CN102537842B - Deign method of light-type controllable lens with double freeform surfaces - Google Patents
Deign method of light-type controllable lens with double freeform surfaces Download PDFInfo
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- CN102537842B CN102537842B CN201210013686.9A CN201210013686A CN102537842B CN 102537842 B CN102537842 B CN 102537842B CN 201210013686 A CN201210013686 A CN 201210013686A CN 102537842 B CN102537842 B CN 102537842B
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Abstract
本发明公开了一种光型可控的双自由曲面透镜设计方法，该方法按照能量等分原理，以光源为坐标原点，将光源的三维空间按经纬线划分成经线和纬线相交的光通量相等的网格图；将目标面划分成等面积的光通量相等的格子区域；并根据待设计的双自由曲面透镜的目标面的对称性及给定的内、外表面的函数关系或者通过从光源和目标面的划分得到的透镜的入射光线的方向以及最终的出射光线的方向分配光线在双自由曲面透镜的内、外表面两次偏折角度，进行设计。双自由曲面透镜的内、外表面可以设计成适应不同封装需要的不同的形状，经过内、外表面能够实现光束控制，满足各种不同照明要求，实现多种不同的照明效果。
The invention discloses a design method of a double free-form surface lens with controllable light pattern. According to the principle of equal division of energy, the method takes the light source as the origin of coordinates, and divides the three-dimensional space of the light source according to the longitude and latitude into equal luminous flux intersections of the longitude and latitude. Grid diagram; Divide the target surface into grid areas with equal area and equal luminous flux; and according to the symmetry of the target surface of the double free-form surface lens to be designed and the given functional relationship between the inner and outer surfaces or through the light source and the target The direction of the incident light of the lens obtained by the division of the surface and the direction of the final outgoing light are distributed to the two deflection angles of the light on the inner and outer surfaces of the double free-form surface lens, and the design is carried out. The inner and outer surfaces of the double free-form surface lens can be designed into different shapes to meet the needs of different packaging, and the beam control can be realized through the inner and outer surfaces to meet various lighting requirements and achieve a variety of different lighting effects.
Description
Technical field
The invention belongs to LED encapsulation technology, relate to the controlled two free-form surface lens methods for designing of a kind of light beam in LED encapsulation, be applied to especially the application that realizes Beam Control in LED encapsulation, meets different lighting demands.
Background technology
LED (Light Emitting Diode) is a kind of light emitting semiconductor device of making based on P-N junction electroluminescence principle, have that electro-optical efficiency is high, the advantage such as long service life, environmental protection and energy saving, volume are little, be described as 21 century green illumination light source, if be applied to traditional lighting field, will obtain very significant energy-saving effect, this is significant now what be becoming tight global energy day.Along with take the breakthrough of the third generation semiconductor material technology that nitride is representative, semiconductor lighting industry based on high power high brightness led (LED) is risen rapidly in the whole world, just become semi-conductor photoelectronic industry new growth engines, and causing a revolution in traditional lighting field.LED, due to its unique superiority, has started to be used widely in a lot of fields, is thought the main development direction of following lighting engineering by industry, has huge market potential.
General, the illuminating effect that directly adopts large power white light LED to obtain is inhomogeneous circular light spot, cannot meet lighting requirement, therefore, need to adopt optical element to control illuminating effect.What the most extensively adopt at present is that element is lens or secondary lens.But traditional lens design method is only to design lens outer surface, and inner lens surfaces is assumed to be to semisphere, so that Lens Design is simple and convenient.The light sending from LED reaches shadow surface can pass through the inside and outside surface of lens successively, there is twice refraction, in traditional design method, directly inner lens surfaces is assumed to be to semisphere, can lose an important Lens Design degree of freedom, and lens shape can not be arbitrarily adjusted according to application.Therefore, develop a kind of design the inside and outside surface of lens simultaneously and meet the method for designing of different lighting requirements particularly important.
Summary of the invention
The object of the present invention is to provide the method for designing of the controlled two free-form surface lens of a kind of smooth type, the method can design the inside and outside surface of lens simultaneously and meet different lighting requirements.
Two free-form surface lens methods for designing that a kind of smooth type provided by the invention is controlled, is characterized in that:
According to energy in part principle, with light source O, be positioned at true origin place, the three dimensions of light source is divided into warp and the crossing grid chart of parallel by warp and weft, the luminous flux of each grid is equated; Target face is divided into the grid area of homalographic, the luminous flux of each grid area equates;
According to the symmetry selection mode A of the target face of two free-form surface lens to be designed or mode B, design:
Mode A: when the target face of two free-form surface lens to be designed is Rotational Symmetry, according to given condition, select corresponding design to be:
A1: by the funtcional relationship of given two free-form surface lens inside surfaces, the direction of the incident ray of the lens that obtain by the division from light source and target face, according to two free-form surface lens inside surface funtcional relationships, according to Snell's law, obtain light by the direction of the refracted ray of two free-form surface lens inside surfaces, then in conjunction with the direction of final emergent ray, according to Snell's law, obtain normal direction and the tangential direction of two free-form surface lens outside surfaces, and then obtain the coordinate figure put on two free-form surface lens outside surfaces, then the point of the outside surface of the two free-form surface lens that obtain is coupled together with smooth curve, in conjunction with given two free-form surface lens inside surfaces, obtain the xsect of two free-form surface lens, xsect is rotated around axis of symmetry, obtain rotational symmetric pair of free-form surface lens,
A2: by the funtcional relationship of given two free-form surface lens outside surfaces, the direction of the incident ray of the lens that obtain by the division in conjunction with from light source and target face, and light is in two free-form surface lens, the direction of the refraction relation of outside surface and final emergent ray, according to Snell's law, solve light by the coordinate of putting on the inside surface of two free-form surface lens, then the point of the inside surface of the two free-form surface lens that obtain is coupled together with smooth curve, in conjunction with given two free-form surface lens outside surfaces, obtain the xsect of two free-form surface lens, xsect is rotated around axis of symmetry, obtain rotational symmetric pair of free-form surface lens,
A3: the direction of the direction of the incident ray of the lens that obtain by the division from light source and target face and final emergent ray, obtain light through in two free-form surface lens, deflection of light angle after outside surface, then according to predefined allocation proportion, total deflection of light angle is divided into deflection of light angle and for the second time deflection of light angle for the first time, incident ray when deflection of light angle refers to the inside surface that occurs in the two free-form surface lens of light process for the first time and the angle of refracted ray, incident ray when deflection of light angle occurs in light through the outside surface of two free-form surface lens for the second time and the angle of refracted ray, in conjunction with the direction of incident ray and deflection of light angle for the first time, according to Snell's law, obtain light in the exit direction of the inside surface of two free-form surface lens, and then obtain the coordinate put on two free-form surface lens inside surfaces, from the refracted ray of the inside surface of two free-form surface lens, be the incident ray of the outside surface of two free-form surface lens, then, in conjunction with the direction of final emergent ray, according to Snell's law, obtain the coordinate of putting on two free-form surface lens outside surfaces, then the point on the inside and outside surface of the two free-form surface lens that obtain is coupled together with smooth curve, obtain the xsect of two free-form surface lens, xsect is rotated around axis of symmetry, obtain rotational symmetric pair of free-form surface lens,
Mode B: when the target face of two free-form surface lens to be designed is non-rotating symmetry, according to given condition, select corresponding design to be:
B1: by the funtcional relationship of given two free-form surface lens inside surfaces, the direction of the incident ray of the lens that obtain by the division from light source and target face, according to two free-form surface lens inside surface funtcional relationships, according to Snell's law, obtain light by the direction of the refracted ray of two free-form surface lens inside surfaces, then in conjunction with the direction of final emergent ray, according to Snell's law, obtain normal direction and the tangential direction of two free-form surface lens outside surfaces, and then obtain the coordinate of the point on two free-form surface lens outside surfaces; Article one kind line using the two free-form surface lens outer surface curve that obtain as two free-form surface lens, the section of corresponding point on the direction by incident ray and last kind line, obtains the coordinate of putting on next kind line of two free-form surface lens; Obtain after all kind lines, point on the kind line of the outside surface of the two free-form surface lens that obtain is coupled together with smooth curve, obtain the free curve of a rule, then all free curves are stitched into free form surface, in conjunction with given two free-form surface lens inside surfaces, obtain two free-form surface lens of non-rotating symmetry;
B2: by the funtcional relationship of given two free-form surface lens outside surfaces, the direction of the incident ray of the lens that obtain by the division in conjunction with from light source and target face, and light is in the direction of the refraction relation on the inside and outside surface of two free-form surface lens and final emergent ray, according to Snell's law, solve light by the coordinate of putting on the inside surface of two free-form surface lens, then the point of the inside surface obtaining is coupled together with smooth curve, obtain article one kind line of two free-form surface lens; The section of direction and last kind line corresponding point by incident ray, obtains the coordinate of the point on next kind lines of two free-form surface lens inside surfaces; Obtain after the coordinate of the point on the kind line of all two free-form surface lens inside surfaces, point on every kind line is coupled together with smooth curve, obtain the free curve of a rule, then all free curves are stitched into free form surface, in conjunction with given two free-form surface lens outside surfaces, obtain two free-form surface lens of non-rotating symmetry;
B3: the direction of the direction of the incident ray of the lens that obtain by the division from light source and target face and final emergent ray, obtain light through in two free-form surface lens, deflection of light angle after outside surface, then predefined allocation proportion, total deflection of light angle is divided into deflection of light angle and for the second time deflection of light angle for the first time, incident ray when deflection of light angle refers to the inside surface that occurs in the two free-form surface lens of light process for the first time and the angle of refracted ray, incident ray when deflection of light angle occurs in light through the outside surface of two free-form surface lens for the second time and the angle of refracted ray, in conjunction with the direction of the incident ray of lens and deflection of light angle for the first time, obtain light in the exit direction of the inside surface of two free-form surface lens, and then according to Snell's law, obtain the coordinate of the point of two free-form surface lens inside surfaces, from the refracted ray of the inside surface of two free-form surface lens, be the incident ray of the outside surface of two free-form surface lens, then in conjunction with the direction of final emergent ray, according to Snell's law, obtain the coordinate of the point of two free-form surface lens outside surfaces, point in the inside and outside surface curve of two free-form surface lens obtaining is coupled together with smooth curve, obtain article one kind line on the inside and outside surface of two free-form surface lens, the section of direction and last kind line corresponding point by incident ray, obtains the coordinate of putting on next kind line on the inside and outside surface of two free-form surface lens, obtain after the coordinate of the point on the kind line on all inside and outside surfaces of two free-form surface lens, point on kind of line is coupled together with smooth curve, obtain the free curve of a rule, then all free curves are stitched into free form surface, obtain two free-form surface lens of non-rotating symmetry.
The inside and outside surface elevation of two free-form surface lens can regulate according to different LED packing forms, highly controlled, can be applied to the packing forms such as LED support formula, chip on board, array, system in package, printed circuit board (PCB) encapsulation and silicon based package.The inside and outside surface configuration of two free-form surface lens can be the difformities that adapt to different encapsulation needs, such as semisphere, cylindrical, elliposoidal, parabolical, cube shaped, terrace with edge shape, truncated cone-shaped or free form surface shape etc.Beam Control can be realized in the inside and outside surface of two free-form surface lens, meets various different lighting requirements, realizes multiple different illuminating effect, such as Homogeneous Circular hot spot, even rectangular light spot, even polygon hot spot etc.
Accompanying drawing explanation
Fig. 1 is the division methods of the light source of the inventive method;
The division methods of the target face that Fig. 2 (1), Fig. 2 (2), Fig. 2 (3) are the inventive method;
Fig. 3 (1), Fig. 3 (2), of the present invention pair of free-form surface lens kind line design method of Fig. 3 (3);
Fig. 4 (1) is the building method of rotational symmetric pair of free-form surface lens, the building method of two free-form surface lens that Fig. 4 (2) is non-rotating symmetry;
Fig. 5 (1), Fig. 5 (2) are two free-form surface lens schematic diagram and the Illumination Distribution figure of the first embodiment;
Fig. 6 (1), Fig. 6 (2) are two free-form surface lens schematic diagram and the Illumination Distribution figure of the second embodiment;
Fig. 7 (1), Fig. 7 (2) are two free-form surface lens schematic diagram and the Illumination Distribution figure of the 3rd embodiment;
Fig. 8 (1), Fig. 8 (2) are two free-form surface lens schematic diagram and the Illumination Distribution figure of the 4th embodiment;
Fig. 9 (1), Fig. 9 (2), Fig. 9 (3) are respectively two free-form surface lens vertical views, A-A sectional view and the B-B sectional view of the 5th embodiment.
300: target face, 301: two free-form surface lens outside surfaces, 302: two free-form surface lens inside surfaces, 303; Section.
Embodiment
As shown in Figure 1, establish light source O and be positioned at true origin place, three dimensions is divided according to warp and weft and divided, parallel is divided into N part, and warp is divided into M part, obtains the crossing grid chart of warp and parallel.The principle that parallel and warp are divided is that the luminous flux that guarantees each Micro-cell Mesh equates.Grid by light source is divided, and obtains the direction of every light.
Target face is divided into the grid area of homalographic, the luminous flux of each grid area equates.According to illumination needs, target face can be circular, rectangle or other shapes, and the shape of grid area can be annular, fan-shaped, rectangle, trapezoidal or other shapes;
As shown in Fig. 2 (1), when target face is circle, target face is divided into N part by warp and weft, parallel is concentric circles, and the area of each annulus is equal, and warp is that equal angles is divided into M part, and each unit dimension equates.As shown in Fig. 2 (2), when target face is rectangle, by symmetry, gets 1/4th of target face and divide, the dash of target face is divided into equal N part, be widely divided into M part, each infinitesimal face is rectangle, area equates; Or as shown in Fig. 2 (3), a right angle of 1/4th target face is divided into N part, long and is widely divided into M part, what each infinitesimal face was homalographic is trapezoidal.The span of M, N determines according to computational accuracy and calculated amount, and generally speaking, the span of M, N is 100 to 2000, and the concrete value of the two can not wait.
As shown in Fig. 3 (1), when the funtcional relationship z=f (x, y) of the outside surface 301 of given pair of free-form surface lens, wherein, (x, y, z) represents point on the two free-form surface lens outside surfaces coordinate in X-Y-Z three dimensions.According to installing, need given couple of free-form surface lens inside surface 302 summit A
0as the starting altitude of two free-form surface lens inside surfaces 302, and its normal vertically upward, its section 303 levels; By the division of the light source shown in Fig. 1, obtain the angle of all incident raies; According to incident ray OA
1with mistake A
0section 303, obtain two free-form surface lens inside surface 302 second point A
1coordinate; According to A
1coordinate and target face 300 corresponding point R
1coordinate and the section of outside surface 301, by Snell's law, obtain two free-form surface lens outside surface 301 second point B
1coordinate, and then obtain two free-form surface lens inside surface 302 refracted ray A
1b
1direction, in conjunction with incident ray OA
1direction, by Snell's law, obtain A
1normal direction and the section 303 of point; The like, obtaining institute on two free-form surface lens inside surfaces 302 has an A
ncoordinate.
Shown in Fig. 3 (2), when the funtcional relationship z=f (x, Y) of the inside surface 302 of given pair of free-form surface lens, wherein, (x, y, z) represents point on the two free-form surface lens inside surfaces coordinate in X-Y-Z three dimensions.The outside surface 301 summit B that need given pair of free-form surface lens are installed according to lens
0as the starting altitude of two free-form surface lens outside surfaces 301, and its normal vertically upward, its section 303 levels; By the division of the light source shown in Fig. 1, obtain the angle of all incident raies; According to article one incident ray OA
1with the funtcional relationship z=(x, y) of inside surface 302, obtain 302 first A of inside surface
1coordinate and the direction A of inside surface 302 refracted rays
1b
1; According to light A
1b
1direction and cross B
0the section 303 of point, obtains 301 first B of outside surface by Snell's law
1coordinate; According to light A
1b
1with final emergent ray B
1r
1, by Snell's law, obtain 301 first B of outside surface
1normal direction and section 303 directions; The like, obtain a B that outside surface 301 has
ncoordinate.
The outside surface 301 of two free-form surface lens or the starting altitude of inside surface 302 (are the summit B of outside surface 301
0the summit A of coordinate or inside surface 302
0coordinate) be to determine according to type and the size of two free-form surface lens: if lens, the span of the starting altitude of inside surface 302 is 1 millimeter to 5 millimeters, and the span of the starting altitude of outside surface 301 is 2 millimeters to 10 millimeters; If secondary lens, the span of the starting altitude of inside surface 302 is 3 millimeters to 10 millimeters, and the span of the starting altitude of outside surface 301 is 5 millimeters to 30 millimeters.
The outside surface 301 of two free-form surface lens or the funtcional relationship of inside surface 302 are next given by the starting altitude of predefined surface configuration and two free-form surface lens, such as working as surface configuration, it is semisphere, starting altitude is 4 millimeters, and funtcional relationship is z=(4
2-x
2-y
2)
0.5; When surface configuration is cylindrical, starting altitude is 2 millimeters, and funtcional relationship is z=(x
2+ y
2)
0.5(0≤z≤2).
Shown in Fig. 3 (3), the division by the target face 300 shown in the energy of light source division shown in Fig. 1 and Fig. 2, obtains all incident ray OA
idirection and goal face 300 on corresponding point R
icoordinate, and then obtain total deviation angle D of every light
i; The deviation angle of every light is split into two little deviation angles according to predefined proportionate relationship, be designated as deviation angle d
1iwith deviation angle d
2i; According to needs, given A are installed
0and B
0for the starting altitude of inner lens surfaces 302, outside surface 301, and its normal vertically upward, its section 303 levels; According to the first rule incident ray OA
1with mistake A
0the section 303 of point, obtains A on inside surface 302
1coordinate; According to deviation angle d
11, by Snell's law, obtain inside surface 302 refracted ray A
1b
1direction and A
1the section 303 of point; According to refracted ray A
1b
1and deviation angle d
12, obtain final emergent ray B
1r
1direction, and then obtain B on outside surface 301 by Snell's law
1coordinate and section 303; The like, obtain on inside surface 302, outside surface 301, there is an A
nand B
ncoordinate.
Described two predefined proportionate relationships of deviation angle determine according to twice deflection of light degree conventionally, and its proportionate relationship is generally 1: 20 to 20: 1.
Described Snell's law is described is the relation between the normal orientation three of incident ray, refracted ray and the body surface of light while inciding body surface, knows that wherein any two amounts just can be obtained the 3rd amount.
Referring to Fig. 4 (1), when lens are Rotational Symmetry, the inner lens surfaces point A obtaining by the method shown in Fig. 3
ior the some B of outside surface
iadopt that point range interpolation, energy approach, the curve constructing method such as curve smoothing or non-unified Rational B Spline Curve connects into a smooth free curve, kind line using the free curve obtaining as lens, rotates and obtains two free-form surface lens entities around rotation axes of symmetry.
Referring to Fig. 4 (2), when lens are non-rotating symmetry, can first design two free-form surface lens of 1/4th, then by twice rotational symmetry, obtain whole pair of free-form surface lens.The point P of the inner lens surfaces obtaining by the method shown in Fig. 3 or outside surface
1ias article one kind line L1; By direction and article one kind line L1 corresponding point P of incident ray I
1itangential direction 303, obtain the upper P of second kind line L2 of two free-form surface lens inside surfaces or outside surface
2icoordinate and section 303; By direction and the second kind line L2 corresponding point P of incident ray I
2itangential direction, obtain the upper P of the 3rd kind line L3 on surface in or beyond two free-form surface lens
3icoordinate and section 303; The like, obtain the kind line on all inside and outside surfaces of two free-form surface lens.Then the point on the kind line on the inside and outside surface of the two free-form surface lens that obtain is coupled together with smooth curve, obtain the free curve of a rule, then all free curves are stitched into free form surface, the two free-form surface lens that obtain 1/4th non-rotating symmetry, then obtain whole pair of free-form surface lens by twice rotational symmetry.
The material of described two free-form surface lens is PC (polycarbonate) or PMMA (polymethylmethacrylate) or PP (polymethylmethacrylate) or ABS (acrylonitrile-butadiene-styrene copolymer) or PVC (Polyvinylchloride) or glass material.
Described two free-form surface lens outside surfaces bottom is provided with the installation foot coordinating with the draw-in groove of substrate or support.
Described two free-form surface lens can be realized by other processing modes such as die sinking injection moulding or Precision Machining.
Described two free-form surface lens are single or array format, and during installation, free-form surface lens and light source corresponding relation are for one to one or one-to-many or many-to-one relationship.
Described two free-form surface lens are applicable to the LED packing forms such as stent-type, chip on board, array, system in package, printed circuit board (PCB) encapsulation and silicon based package.
Below by by embodiment, the present invention being described in further detail, but following examples are only illustrative, and protection scope of the present invention is not subject to the restriction of these embodiment.
Example 1
Referring to Fig. 5 (1), what in the present embodiment, relate to is that a kind of inside surface is the two free-form surface lens of Rotational Symmetry cylindrical, that outside surface is free form surface.In the present embodiment, the material of two free-form surface lens is PC (polycarbonate), and inside surface height is 1 millimeter, and outside surface height is 4 millimeters, and the funtcional relationship of given inside surface is 1=x
2+ y
2(0≤z≤1), being is highly 1 millimeter, radius is the cylinder of 1 millimeter, wherein, the coordinate of the point on the two free-form surface lens inside surfaces of (x, y, z) expression in X-Y-Z three dimensions.Referring to Fig. 2 (1), target face is that radius is the disc of 100 millimeters, according to Fig. 2 (1), divides, and N gets 200, M and gets 300, and light source is 50 millimeters to the distance of target face.Referring to Fig. 5 (2), be the Illumination Distribution figure of the two free-form surface lens in the present embodiment in target face.
Example 2
Referring to Fig. 6 (1), what in the present embodiment, relate to is that a kind of outside surface is the two free-form surface lens of Rotational Symmetry cylindrical, that inside surface is free form surface.In the present embodiment, the material of two free-form surface lens is PMMA (polymethylmethacrylates), and inside surface height is 2 millimeters, and outside surface height is 4 millimeters, and the funtcional relationship of given outside surface is 4=x
2+ y
2(0≤z≤4), being is highly 4 millimeters, radius is the cylinder of 2 millimeters, wherein, the coordinate of the point on the two free-form surface lens outside surfaces of (x, y, z) expression in X-Y-Z three dimensions.Referring to Fig. 2 (1), target face is that radius is the disc of 200 millimeters, according to Fig. 2 (1), divides, and N gets 500, M and gets 800, and light source is 100 millimeters to the distance of target face.Referring to Fig. 6 (2), be the Illumination Distribution figure of the two free-form surface lens in the present embodiment in target face.
Example 3
Referring to Fig. 7 (1), what in the present embodiment, relate to is that a kind of inside surface is the two free-form surface lens of Rotational Symmetry that semisphere, outside surface are free form surface.In the present embodiment, the material of two free-form surface lens is PP (polymethylmethacrylates), and inside surface height is 1 millimeter, and outside surface height is 3 millimeters, and the funtcional relationship of given inside surface is z=(1-x
2-y
2)
0.5, be radius and be the hemisphere face of 1 millimeter, wherein, (x, y, z) represents point on the two free-form surface lens inside surfaces coordinate in X-Y-Z three dimensions.Referring to Fig. 2 (1), target face is that radius is the disc of 100 millimeters, according to Fig. 2 (1), divides, and N gets 500, M and gets 500, and light source is 50 millimeters to the distance of target face.Referring to Fig. 7 (2), be the Illumination Distribution figure of the two free-form surface lens in the present embodiment in target face.
Example 4
Referring to Fig. 8 (1), what in the present embodiment, relate to is the two free-form surface lens of Rotational Symmetry that a kind of inside surface and outside surface are free form surface.In the present embodiment, the material of two free-form surface lens is ABS (acrylonitrile-butadiene-styrene copolymers), and inside surface height is 4 millimeters, and outside surface height is 7 millimeters, and two given deflection of light ratios are 1: 1.Referring to Fig. 2 (1), target face is that radius is the disc of 1000 millimeters, according to Fig. 2 (1), divides, and N gets 500, M and gets 800, and light source is 500 millimeters to the distance of target face.Referring to Fig. 8 (2), be the Illumination Distribution figure of the two free-form surface lens in the present embodiment in target face.
Example 5
Referring to Fig. 9 (1), Fig. 9 (2), Fig. 9 (3), what in the present embodiment, relate to is that a kind of inside surface for road lighting is two free-form surface lens of semisphere, the outside surface non-rotating symmetry that is free form surface.In the present embodiment, the material of two free-form surface lens is PVC (Polyvinylchloride), and inside surface height is 2 millimeters, and outside surface height is 5 millimeters, and the funtcional relationship of given inside surface is z=(2
2-x
2-y
2)
0.5, be radius and be the hemisphere face of 2 millimeters, wherein, (x, y, z) represents point on the two free-form surface lens inside surfaces coordinate in X-Y-Z three dimensions.Referring to Fig. 2 (2), target face is long 1000 millimeters, and the rectangle of wide 500 millimeters is divided according to Fig. 2 (2), and N gets 500, M and gets 500, and light source is 500 millimeters to the distance of target face.The illuminating effect of example 5 also meets lighting requirement.
The above is preferred embodiment of the present invention, but the present invention should not be confined to the disclosed content of this embodiment and accompanying drawing.So every, do not depart from the equivalence completing under spirit disclosed in this invention or revise, all falling into the scope of protection of the invention.
Claims (9)
1. controlled two free-form surface lens methods for designing of light type, is characterized in that:
According to energy in part principle, with light source O, be positioned at true origin place, the three dimensions of light source is divided into warp and the crossing grid chart of parallel by warp and weft, the luminous flux of each grid is equated; Target face is divided into the grid area of homalographic, the luminous flux of each grid area equates;
When the target face of two free-form surface lens to be designed is Rotational Symmetry, by the funtcional relationship of given two free-form surface lens inside surfaces, described inner surface configuration is free form surface shape, the direction of the incident ray of the lens that obtain by the division from light source and target face, according to two free-form surface lens inside surface funtcional relationships, according to Snell's law, obtain light by the direction of the refracted ray of two free-form surface lens inside surfaces, then in conjunction with the direction of final emergent ray, according to Snell's law, obtain normal direction and the tangential direction of two free-form surface lens outside surfaces, and then obtain the coordinate figure put on two free-form surface lens outside surfaces, then the point of the outside surface of the two free-form surface lens that obtain is coupled together with smooth curve, in conjunction with given two free-form surface lens inside surfaces, obtain the xsect of two free-form surface lens, xsect is rotated around axis of symmetry, obtain rotational symmetric pair of free-form surface lens.
2. controlled two free-form surface lens methods for designing of light type, is characterized in that:
According to energy in part principle, with light source O, be positioned at true origin place, the three dimensions of light source is divided into warp and the crossing grid chart of parallel by warp and weft, the luminous flux of each grid is equated; Target face is divided into the grid area of homalographic, the luminous flux of each grid area equates;
When the target face of two free-form surface lens to be designed is Rotational Symmetry, by the funtcional relationship of given two free-form surface lens outside surfaces, the direction of the incident ray of the lens that obtain by the division in conjunction with from light source and target face, and light is in two free-form surface lens, the direction of the refraction relation of outside surface and final emergent ray, according to Snell's law, solve light by the coordinate of putting on the inside surface of two free-form surface lens, then the point of the inside surface of the two free-form surface lens that obtain is coupled together with smooth curve, in conjunction with given two free-form surface lens outside surfaces, obtain the xsect of two free-form surface lens, xsect is rotated around axis of symmetry, obtain rotational symmetric pair of free-form surface lens.
3. controlled two free-form surface lens methods for designing of light type, is characterized in that:
According to energy in part principle, with light source O, be positioned at true origin place, the three dimensions of light source is divided into warp and the crossing grid chart of parallel by warp and weft, the luminous flux of each grid is equated; Target face is divided into the grid area of homalographic, the luminous flux of each grid area equates;
When the target face of two free-form surface lens to be designed is Rotational Symmetry, the direction of the direction of the incident ray of the lens that obtain by the division from light source and target face and final emergent ray, obtain light through in two free-form surface lens, deflection of light angle after outside surface, then according to predefined allocation proportion, total deflection of light angle is divided into deflection of light angle and for the second time deflection of light angle for the first time, incident ray when deflection of light angle refers to the inside surface that occurs in the two free-form surface lens of light process for the first time and the angle of refracted ray, incident ray when deflection of light angle occurs in light through the outside surface of two free-form surface lens for the second time and the angle of refracted ray, in conjunction with the direction of incident ray and deflection of light angle for the first time, according to Snell's law, obtain light in the exit direction of the inside surface of two free-form surface lens, and then obtain the coordinate put on two free-form surface lens inside surfaces, from the refracted ray of the inside surface of two free-form surface lens, be the incident ray of the outside surface of two free-form surface lens, then, in conjunction with the direction of final emergent ray, according to Snell's law, obtain the coordinate of putting on two free-form surface lens outside surfaces, then the point on the inside and outside surface of the two free-form surface lens that obtain is coupled together with smooth curve, obtain the xsect of two free-form surface lens, xsect is rotated around axis of symmetry, obtain rotational symmetric pair of free-form surface lens.
4. controlled two free-form surface lens methods for designing of light type, is characterized in that:
According to energy in part principle, with light source O, be positioned at true origin place, the three dimensions of light source is divided into warp and the crossing grid chart of parallel by warp and weft, the luminous flux of each grid is equated; Target face is divided into the grid area of homalographic, the luminous flux of each grid area equates;
When the target face of two free-form surface lens to be designed is non-rotating symmetry, by the funtcional relationship of given two free-form surface lens inside surfaces, described inner surface configuration is free form surface shape; The direction of the incident ray of the lens that obtain by the division from light source and target face, according to two free-form surface lens inside surface funtcional relationships, according to Snell's law, obtain light by the direction of the refracted ray of two free-form surface lens inside surfaces, then in conjunction with the direction of final emergent ray, according to Snell's law, obtain normal direction and the tangential direction of two free-form surface lens outside surfaces, and then obtain the coordinate of the point on two free-form surface lens outside surfaces; Article one kind line using the two free-form surface lens outer surface curve that obtain as two free-form surface lens, the section of corresponding point on the direction by incident ray and last kind line, obtains the coordinate of putting on next kind line of two free-form surface lens; Obtain after all kind lines, point on the kind line of the outside surface of the two free-form surface lens that obtain is coupled together with smooth curve, obtain the free curve of a rule, then all free curves are stitched into free form surface, in conjunction with given two free-form surface lens inside surfaces, obtain two free-form surface lens of non-rotating symmetry.
5. controlled two free-form surface lens methods for designing of light type, is characterized in that:
According to energy in part principle, with light source O, be positioned at true origin place, the three dimensions of light source is divided into warp and the crossing grid chart of parallel by warp and weft, the luminous flux of each grid is equated; Target face is divided into the grid area of homalographic, the luminous flux of each grid area equates;
When the target face of two free-form surface lens to be designed is non-rotating symmetry, by the funtcional relationship of given two free-form surface lens outside surfaces, the direction of the incident ray of the lens that obtain by the division in conjunction with from light source and target face, and light is in two free-form surface lens, the direction of the refraction relation of outside surface and final emergent ray, according to Snell's law, solve light by the coordinate of putting on the inside surface of two free-form surface lens, then the point of the inside surface obtaining is coupled together with smooth curve, obtain article one kind line of two free-form surface lens, the section of direction and last kind line corresponding point by incident ray, obtains the coordinate of the point on next kind lines of two free-form surface lens inside surfaces, obtain after the coordinate of the point on the kind line of all two free-form surface lens inside surfaces, point on every kind line is coupled together with smooth curve, obtain the free curve of a rule, then all free curves are stitched into free form surface, in conjunction with given two free-form surface lens outside surfaces, obtain two free-form surface lens of non-rotating symmetry.
6. controlled two free-form surface lens methods for designing of light type, is characterized in that:
According to energy in part principle, with light source O, be positioned at true origin place, the three dimensions of light source is divided into warp and the crossing grid chart of parallel by warp and weft, the luminous flux of each grid is equated; Target face is divided into the grid area of homalographic, the luminous flux of each grid area equates;
When the target face of two free-form surface lens to be designed is non-rotating symmetry, the direction of the direction of the incident ray of the lens that obtain by the division from light source and target face and final emergent ray, obtain light through in two free-form surface lens, deflection of light angle after outside surface, then predefined allocation proportion, total deflection of light angle is divided into deflection of light angle and for the second time deflection of light angle for the first time, incident ray when deflection of light angle refers to the inside surface that occurs in the two free-form surface lens of light process for the first time and the angle of refracted ray, incident ray when deflection of light angle occurs in light through the outside surface of two free-form surface lens for the second time and the angle of refracted ray, in conjunction with the direction of the incident ray of lens and deflection of light angle for the first time, obtain light in the exit direction of the inside surface of two free-form surface lens, and then according to Snell's law, obtain the coordinate of the point of two free-form surface lens inside surfaces, from the refracted ray of the inside surface of two free-form surface lens, be the incident ray of the outside surface of two free-form surface lens, then in conjunction with the direction of final emergent ray, according to Snell's law, obtain the coordinate of the point of two free-form surface lens outside surfaces, point in the inside and outside surface curve of two free-form surface lens obtaining is coupled together with smooth curve, obtain article one kind line on the inside and outside surface of two free-form surface lens, the section of direction and last kind line corresponding point by incident ray, obtains the coordinate of putting on next kind line on the inside and outside surface of two free-form surface lens, obtain after the coordinate of the point on the kind line on all inside and outside surfaces of two free-form surface lens, point on kind of line is coupled together with smooth curve, obtain the free curve of a rule, then all free curves are stitched into free form surface, obtain two free-form surface lens of non-rotating symmetry.
7. according to arbitrary described controlled two free-form surface lens methods for designing of a kind of smooth type in claim 1 to 6, it is characterized in that, the size that adopts two free-form surface lens that described method designs is determined by the starting altitude on the inside and outside surface of two free-form surface lens.
8. according to arbitrary described controlled two free-form surface lens methods for designing of a kind of smooth type in claim 1 to 6, inside surface is free form surface, the outside surface of lens is free form surface, inside surface is recessed to outside surface, inner lens surfaces is the plane of light incidence of lens, the optics exit facet that lens outer surface is lens.
9. according to arbitrary described controlled two free-form surface lens methods for designing of a kind of smooth type in claim 1 to 6, the material of free-form surface lens is polycarbonate, polymetylmethacrylate, polypropylene PP, acrylonitrile-butadiene-styrene copolymer ABS, polyvinylchloride or glass material.
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| CN106764554A (en) * | 2016-12-21 | 2017-05-31 | 中国科学院工程热物理研究所 | A kind of secondary optical lens method for designing that uniform irradiation is measured based on quantum |
| CN106641793B (en) * | 2016-12-21 | 2020-03-17 | 中国科学院工程热物理研究所 | Secondary optical lens design method based on photon measurement non-uniform irradiation |
| CN107687623A (en) * | 2017-07-21 | 2018-02-13 | 华南理工大学 | Double optical lens with free curved surface for LED car high beam |
| CN108613136A (en) * | 2018-04-09 | 2018-10-02 | 深圳民爆光电技术有限公司 | A kind of control method and system generating free-form surface lens based on energy distribution method |
| CN108870318B (en) * | 2018-05-21 | 2020-06-02 | 广东工业大学 | A design method of LED free-form surface lens |
| CN112946906A (en) * | 2021-03-26 | 2021-06-11 | 暨南大学 | Space light intensity homogenizing system for DMD projection lithography and design method thereof |
| CN114442317A (en) * | 2022-03-01 | 2022-05-06 | 北京有竹居网络技术有限公司 | Method for designing an optical element and associated optical system |
| CN116293525B (en) * | 2022-12-31 | 2024-12-03 | 中国人民解放军空军特色医学中心 | Method and device for achieving uniform irradiance distribution of LED |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482652A (en) * | 2009-02-12 | 2009-07-15 | 复旦大学 | Light distribution lens design method aiming at point light source |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005209601A (en) * | 2003-12-25 | 2005-08-04 | Ichikoh Ind Ltd | Projector type vehicle lamp |
-
2012
- 2012-01-16 CN CN201210013686.9A patent/CN102537842B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482652A (en) * | 2009-02-12 | 2009-07-15 | 复旦大学 | Light distribution lens design method aiming at point light source |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2005-209601A 2005.08.04 |
| 大功率LED封装与应用的自由曲面光学研究;王恺;《华中科技大学博士学位论文》;20111015;26-65，77-124 * |
| 王恺.大功率LED封装与应用的自由曲面光学研究.《华中科技大学博士学位论文》.2011, |
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