CN106019538A - Digital double-unit opposite-projecting reflective half-fulldome projecting camera structure - Google Patents
Digital double-unit opposite-projecting reflective half-fulldome projecting camera structure Download PDFInfo
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- CN106019538A CN106019538A CN201610623955.1A CN201610623955A CN106019538A CN 106019538 A CN106019538 A CN 106019538A CN 201610623955 A CN201610623955 A CN 201610623955A CN 106019538 A CN106019538 A CN 106019538A
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- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 239000005304 optical glass Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 8
- 210000001747 pupil Anatomy 0.000 claims description 3
- 230000004075 alteration Effects 0.000 abstract description 17
- 201000009310 astigmatism Diseases 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract 1
- 238000002834 transmittance Methods 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 206010010071 Coma Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
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Abstract
The invention discloses a digital double-unit opposite-projecting reflective half-fulldome projecting camera structure. The camera structure comprises a projecting camera body, a first lens group, a second lens group, a diaphragm and a third lens group are sequentially arranged on the projecting camera body from the fulldome side, the second lens group comprises a fourth lens, and the third lens group comprises a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from the fulldome side. The projecting camera structure can overcome defects of the prior art and has the optical characteristics of high transmittance, high definition, high contrast, low astigmatism and small chromatic aberration.
Description
Technical field
The present invention relates to a kind of reflective hemisphere curtain projection lens structure, especially a kind of numeral two-shipper is to projection hemisphere curtain projection lens structure.
Background technology
Ball-screen projection, is a kind of emerging display technique, and it has broken the limitation that conventional projection picture can only be plane regular figure.Ball-screen projection is divided into two kinds according to the difference of digital projector present position: one is outer pitching, the digital projector used is positioned at outside spheroid, project image onto outer surface of spheroid, owing at least needing 4 digital projectors, and site requirements is big, and the factor such as viewing poor effect, and seldom it is used；Another kind is interior pitching, the digital projector used is positioned at ball interior, project image onto ball interior, at present, this interior delivery system is broadly divided into two classes: a class is transmission-type, ball curtain form mostly is hemispherical, and ball curtain diameter range is about 0.5 meter 1.8 meters, and spectators watch projected picture outside spheroid；Another kind of is reflective, and ball curtain form is based on hemisphere, and the direct scope of ball curtain is about 2 meters 12 meters, and spectators watch projected picture at ball interior.Reflective half ball curtain projection system has, because of it, the image effect more shaken, and is widely used observatory, seismological bureau, the place such as NASA, school, museum, exhibition center, science and technology center, space theatre.Reflective half ball curtain projection system mainly has two kinds of implementations: one is that digital projector is placed in hemisphere curtain center, the fish eye lens of an angle of visual field 180 ° of arranging in pairs or groups, signal projects spherical screen imaging, and the advantage of this mode is low cost, and picture uniformity is preferable, easily realize, later maintenance is few, shortcoming be picture brightness and resolution on the low side, the utilization rate of chip is the lowest, energy loss is big, and digital projector occupies the optimum position of viewing ball curtain picture；Another kind is as hemisphere curtain edge by multiple stage digital projector (not less than four), collocation standard lens, sherical seamless picture true to nature is presented by edge fusion technology, advantage is picture brightness and definition height, have more viewing space, shortcoming is high cost, and integration technology requires height, and later maintenance complexity is loaded down with trivial details.
nullFor large-scale ball screen cinema projection system，Equally exist similar technical problem，In order to change this state of the art，Patent of invention CN104020547A gives a kind of Two bors d's oeuveres to throwing digital ball-screen cinema camera lens，But this lens construction contents just to the use of the d-cinema projectors of the three target surface DLP that chip size is 0.95 inch～1.38 inches，Lens construction in this patent of invention coordinate chip size be 0.55 inch～1.2 inches single target surface DLP or three target surface LCD digital projector for two-shipper to projection half ball-screen projection time，Its projected picture effect is poor，Such as poor definition，Astigmatism is big，Aberration is serious，Poor contrast，Brightness is low，Have a strong impact on viewing effect，Additionally，This lens construction is complex，Manufacturing cost is high，And entirety transmitance is low.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of numeral two-shipper to projection hemisphere curtain projection lens structure, it is possible to solves the deficiencies in the prior art, has high permeability, fine definition, high-contrast, low astigmatism, the optical characteristics of little aberration.
For solving above-mentioned technical problem, the technical solution used in the present invention is as follows.
A kind of numeral two-shipper is to projection hemisphere curtain projection lens structure, including projection lens body, projection lens body is disposed with the first lens group, the second lens group, diaphragm and the 3rd lens group from ball curtain side, the first lens that the first lens group includes setting gradually from ball curtain side, the second lens, the 3rd lens；Second lens group includes the 4th lens；3rd lens group includes the 5th lens, the 6th lens and the 7th lens set gradually from ball curtain side.
As preferably, described first lens, the second lens, the 3rd lens are negative curved month type, and the convex surface of camera lens is all towards ball curtain side.
As preferably, described 4th lens are biconvex, and the bigger side of its curvature absolute value is towards ball curtain side.
As preferably, described 5th lens and the 6th lens are double glued mirror groups, described 5th lens are negative curved month type, camera lens convex surface facing ball curtain side, described 6th lens are biconvex, the side that its curvature absolute value is bigger is biconvex towards ball curtain side, the 7th lens, and the bigger side of its curvature absolute value is towards ball curtain side.
As preferably, the distance of described diaphragm and the second lens group is more than diaphragm and the distance of the 3rd lens group.
As preferably, the focal power absolute value of described first lens group, the second lens group and the 3rd lens group is followed successively by 1: 0.193: 0.493 than from front to back, wherein the focal power of the first lens group is negative value, the focal power of the second lens group be on the occasion of, the focal power of the 3rd lens group be on the occasion of, the focal power sum of the first lens group and the second lens group is negative value, and the ratio of the absolute value of the focal power of the absolute value of the focal power sum of the first lens group and the second lens group and the 3rd lens group is 1:0.61.
As preferably, the optical performance parameter scope of described camera lens is: focal distance f ＇=5.94mm～15.75mm；Relative aperture D/f ＇=1/1.8～1/2.0；The angle of visual field 2 ω=90 °～110 °；Anti-more than for 3.5～6.1；Wherein D is Entry pupil diameters.
As preferably, the coloured light wave-length coverage that described camera lens is suitable for is 430nm～660nm.
As preferably, described first lens, the second lens, the 3rd lens all use weight crown system colouless optical glass material；4th lens use dense flint system colouless optical glass material；5th lens, the 6th lens, the 7th lens use dense flint system, weight crown system, weight crown system colouless optical glass material successively.
nullWhat employing technique scheme was brought has the beneficial effects that: the present invention is according to reversibility of optical path principle，Utilize " non-similar " image-forming principle and Modern Geometry optical aberration theoretical basis，Set up suitable initial optical structure，Certain thickness equivalent parallel plate optical glass is added after initial optical structure，For simulating the internal color splitting and mixing prism of digital projector，Participate in aberration coupling and the balance of optical texture，The most reasonably calculate projection distortion numerical value，By the Aided Design of optical design software，And combine artificial mathematical interpolation analysis method，Reasonably distribution system focal power，By constructing front group of negative power，For increasing the angle of visual field and producing rational distortion curve，Middle group of positive light coke，For reducing by the front group of coma produced、Spherical aberration、Astigmatism and reduction senior aberration amount，Rear group of positive light coke，For compensating front group and the residual aberration of middle group，Finally，Through constantly amendment parameter objectives value and various aberration target control value，Constantly each group of structure is modified transformation again，Again through repeatedly optimizing re-optimization，Solve existing Two bors d's oeuveres camera lens projected picture poor definition，Astigmatism is big，Aberration is serious，Poor contrast，Brightness is low，Structure is complicated，Manufacturing cost is high，The problems such as transmitance is low.This lens construction is made up of 6 groups of 7 optical glass lens, have the angle of visual field of maximum 110 °, relative aperture is up to 1/1.8, bigger anti-more than, maximum 6.1 times, the use of the various digital projectors of single target surface DLP that chip size is 0.55 inch～1.2 inches or three target surface LCD can be satisfied with.Having the optical property advantages such as high brightness, fine definition, high-contrast, low astigmatism, little aberration, the ball curtain projection system low cost of composition, later maintenance is simple, and has more viewing space.
Accompanying drawing explanation
Fig. 1 is the structure chart of one detailed description of the invention of the present invention.
Fig. 2 is the ray tracing schematic diagram of the present invention.
Fig. 3 is that the digital two-shipper applied of the present invention is to projection half ball curtain projection system structural representation.
Fig. 4 is the transfer curve figure of optical texture of the present invention.
Fig. 5 is the spherical aberration curve chart of optical texture of the present invention.
Fig. 6 is the chromatic longitudiinal aberration curve chart of optical texture of the present invention.
In figure: 11, the first lens group；12, the second lens group；13, diaphragm；14, the 3rd lens group；1101, the first lens；1102, the second lens；1103, the 3rd lens；1201, the 4th lens；1401-1, the 5th lens；1401-2, the 6th lens；1402, the 7th lens；M, ball curtain；A, feature light.
Detailed description of the invention
The standardized element used in the present invention all can be commercially, shaped piece all can carry out customized according to the record with accompanying drawing of description, the concrete connected mode of each part all use in prior art ripe bolt, rivet, weld, the conventional means such as stickup, be not described in detail in this.
With reference to Fig. 1, one detailed description of the invention of the present invention includes projection lens body, projection lens body is disposed with first lens group the 11, second lens group 12, diaphragm 13 and the 3rd lens group 14 from ball curtain side, and the first lens group 11 includes first lens the 1101, second lens the 1102, the 3rd lens 1103 set gradually from ball curtain side；Second lens group 12 includes the 4th lens 1201；3rd lens group 14 includes the 5th lens 1401-1, the 6th lens 1401-2 and the 7th lens 1402 set gradually from ball curtain side.First lens the 1101, second lens the 1102, the 3rd lens 1103 are negative curved month type, and the convex surface of camera lens is all towards ball curtain side.4th lens 1201 are biconvex, and the bigger side of its curvature absolute value is towards ball curtain side.5th lens 1401-1 and the 6th lens 1401-2 is double glued mirror groups, described 5th lens 1401-1 is negative curved month type, camera lens convex surface facing ball curtain side, described 6th lens 1401-2 is biconvex, the bigger side of its curvature absolute value is towards ball curtain side, 7th lens 1402 are biconvex, and the bigger side of its curvature absolute value is towards ball curtain side.The distance of diaphragm 13 and the second lens group 12 is more than diaphragm 13 and the distance of the 3rd lens group 14.The focal power absolute value of first lens group the 11, second lens group 12 and the 3rd lens group 14 is followed successively by 1: 0.193: 0.493 than from front to back, wherein the focal power of the first lens group 11 is negative value, the focal power of the second lens group 12 be on the occasion of, the focal power of the 3rd lens group 14 be on the occasion of, the focal power sum of the first lens group 11 and the second lens group 12 is negative value, and the ratio of the absolute value of the focal power of the absolute value of the focal power sum of the first lens group 11 and the second lens group 12 and the 3rd lens group 14 is 1:0.61.The optical performance parameter scope of camera lens is: focal distance f ＇=5.94mm～15.75mm；Relative aperture D/f ＇=1/1.8～1/2.0；The angle of visual field 2 ω=90 °～110 °；Anti-more than for 3.5～6.1；Wherein D is Entry pupil diameters.The coloured light wave-length coverage that camera lens is suitable for is 430nm～660nm.First lens the 1101, second lens the 1102, the 3rd lens 1103 all use weight crown system colouless optical glass material；4th lens 1201 use dense flint system colouless optical glass material；5th lens 1401-1, the 6th lens 1401-2, the 7th lens 1402 use dense flint system, weight crown system, weight crown system colouless optical glass material successively.
As in figure 2 it is shown, give numeral two-shipper, the feature light a of each specific visual field of projection hemisphere curtain projection lens structure is moved towards, and feature light a is at the incoming position of each lens surface.
During as it is shown on figure 3, utilize camera lens of the present invention to carry out numeral two-shipper to projection half ball-screen projection, two the digital engineering scialyscopes being furnished with camera lens of the present invention are separately mounted to the left and right symmetrical both sides on edge under reflective hemisphere curtain M.Projected picture is projected the right portion mostly of reflective hemisphere curtain M by First digital engineering scialyscope with certain elevation angle by camera lens of the present invention, projected picture is projected the left portion mostly of reflective hemisphere curtain M by another digital engineering scialyscope with certain elevation angle by camera lens of the present invention, two projected pictures being projected out have certain overlapping region at the Chi Daochu of reflective hemisphere curtain M, merge for picture.When two digital engineering scialyscope synchronized projection, spectators just can enjoy the projected picture of high brightness, fine definition, high-contrast in the ball curtain Room.
In order to embodiments of the invention are described, when camera lens equivalent focal length is 1, its Optic structure parameter is as follows:
Fig. 4 is the transfer curve figure of lens optical structure of the present invention, and abscissa is the spatial frequency of image planes, and vertical coordinate is the optical transfer function value of system.
Fig. 5 is the spherical aberration curve chart of lens optical structure of the present invention, and abscissa is the numerical value of spherical aberration, and vertical coordinate is normalization aperture.
Fig. 6 is the chromatic longitudiinal aberration curve chart of lens optical structure of the present invention, and abscissa is the numerical value of chromatic longitudiinal aberration, and vertical coordinate is normalization visual field.
In describing the invention, it will be appreciated that, term " longitudinally ", " laterally ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; the principle that the present invention is simply described described in above-described embodiment and description; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within scope of the claimed invention.Claimed scope is defined by appending claims and equivalent thereof.
Claims (9)
1. a digital two-shipper is to projection hemisphere curtain projection lens structure, including projection lens body, projection lens body is disposed with the first lens group (11), the second lens group (12), diaphragm (13) and the 3rd lens group (14) from ball curtain side, it is characterised in that: the first lens (1101) that the first lens group (11) includes setting gradually from ball curtain side, the second lens (1102), the 3rd lens (1103)；Second lens group (12) includes the 4th lens (1201)；3rd lens group (14) includes the 5th lens (1401-1), the 6th lens (1401-2) and the 7th lens (1402) set gradually from ball curtain side.
Numeral two-shipper the most according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterized in that: described first lens (1101), the second lens (1102), the 3rd lens (1103) are negative curved month type, and the convex surface of camera lens is all towards ball curtain side.
Numeral two-shipper the most according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterised in that: described 4th lens (1201) are biconvex, and the bigger side of its curvature absolute value is towards ball curtain side.
Numeral two-shipper the most according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterized in that: described 5th lens (1401-1) and the 6th lens (1401-2) are double glued mirror groups, described 5th lens (1401-1) are negative curved month type, camera lens convex surface facing ball curtain side, described 6th lens (1401-2) are biconvex, the bigger side of its curvature absolute value is towards ball curtain side, 7th lens (1402) are biconvex, and the bigger side of its curvature absolute value is towards ball curtain side.
Numeral two-shipper the most according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterised in that: the distance of described diaphragm (13) and the second lens group (12) is more than diaphragm (13) and the distance of the 3rd lens group (14).
6. according to the digital two-shipper described in claim 1-5 any one to projection hemisphere curtain projection lens structure, it is characterized in that: described first lens group (11), the focal power absolute value of the second lens group (12) and the 3rd lens group (14) is followed successively by 1: 0.193: 0.493 than from front to back, wherein the focal power of the first lens group (11) is negative value, the focal power of the second lens group (12) be on the occasion of, the focal power of the 3rd lens group (14) be on the occasion of, the focal power sum of the first lens group (11) and the second lens group (12) is negative value, and first lens group (11) and the second lens group (12) the absolute value of focal power sum and the ratio of absolute value of focal power of the 3rd lens group (14) be 1:0.61.
Numeral two-shipper the most according to claim 6 is to projection hemisphere curtain projection lens structure, it is characterised in that: the optical performance parameter scope of described camera lens is: focal distance f ＇=5.94mm～15.75mm；Relative aperture D/f ＇=1/1.8～1/2.0；The angle of visual field 2 ω=90 °～110 °；Anti-more than for 3.5～6.1；Wherein D is Entry pupil diameters.
Numeral two-shipper the most according to claim 7 is to projection hemisphere curtain projection lens structure, it is characterised in that: the coloured light wave-length coverage that described camera lens is suitable for is 430nm～660nm.
Numeral two-shipper the most according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterised in that: described first lens (1101), the second lens (1102), the 3rd lens (1103) all use weight crown system colouless optical glass material；4th lens (1201) use dense flint system colouless optical glass material；5th lens (1401-1), the 6th lens (1401-2), the 7th lens (1402) use dense flint system, weight crown system, weight crown system colouless optical glass material successively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610623955.1A CN106019538B (en) | 2016-08-03 | 2016-08-03 | It is a kind of number two-shipper to projection hemisphere curtain projection lens structure |
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| CN201610623955.1A CN106019538B (en) | 2016-08-03 | 2016-08-03 | It is a kind of number two-shipper to projection hemisphere curtain projection lens structure |
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| CN106019538B CN106019538B (en) | 2019-02-15 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1161461A (en) * | 1995-06-02 | 1997-10-08 | 德克萨斯仪器股份有限公司 | Offset zoom lens for reflective light modulators |
| US20030133201A1 (en) * | 1999-08-31 | 2003-07-17 | Canon Kabushiki Kaisha | Zoom lens and optical appartus having the same |
| US20040032653A1 (en) * | 2002-08-16 | 2004-02-19 | Gohman Jeffrey Alan | Wide angle lens system having a distorted intermediate image |
| CN102388331A (en) * | 2009-04-24 | 2012-03-21 | 株式会社理光 | Wide angle lens and imaging device |
| JP2013160984A (en) * | 2012-02-07 | 2013-08-19 | Ricoh Co Ltd | Imaging optical system and imaging apparatus |
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| JP2016126254A (en) * | 2015-01-07 | 2016-07-11 | コニカミノルタ株式会社 | Imaging lens, imaging apparatus, and projection device |
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2016
- 2016-08-03 CN CN201610623955.1A patent/CN106019538B/en active Active
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|---|---|---|---|---|
| CN1161461A (en) * | 1995-06-02 | 1997-10-08 | 德克萨斯仪器股份有限公司 | Offset zoom lens for reflective light modulators |
| US20030133201A1 (en) * | 1999-08-31 | 2003-07-17 | Canon Kabushiki Kaisha | Zoom lens and optical appartus having the same |
| US20050030642A1 (en) * | 1999-08-31 | 2005-02-10 | Canon Kabushiki Kaisha | Zoom lens and optical apparatus having the same |
| US20040032653A1 (en) * | 2002-08-16 | 2004-02-19 | Gohman Jeffrey Alan | Wide angle lens system having a distorted intermediate image |
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| JP2013160984A (en) * | 2012-02-07 | 2013-08-19 | Ricoh Co Ltd | Imaging optical system and imaging apparatus |
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Address after: 066000 No. 165 middle section of Hebei Avenue, Qinhuangdao, Hebei. Applicant after: Qinhuangdao audio-visual Machinery Research Institute Co., Ltd. Address before: 066000 No. 165 middle section of Hebei Avenue, Qinhuangdao, Hebei. Applicant before: Qinhuangdao Video-Audio Machinery Inst. |
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Effective date of registration: 20200317 Address after: 066000 room 701, room 702, room 704, room 705, room 706, room 707, room 801, room 708, room 706, building 9, No. 165, middle section of Hebei Street, Haigang District, Qinhuangdao City, Hebei Province Patentee after: Qinhuangdao Meishida Audio Visual Testing Technology Co., Ltd Address before: 066000 No. 165, Hebei Avenue, Qinhuangdao seaport District, Hebei, China Patentee before: Qinhuangdao audio-visual Machinery Research Institute Co.,Ltd. |