CN112965220A - Adjustable ultra-short-focus projection lens - Google Patents
Adjustable ultra-short-focus projection lens Download PDFInfo
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- CN112965220A CN112965220A CN202110403086.2A CN202110403086A CN112965220A CN 112965220 A CN112965220 A CN 112965220A CN 202110403086 A CN202110403086 A CN 202110403086A CN 112965220 A CN112965220 A CN 112965220A
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- projection lens
- short
- focus projection
- ultra
- mirror surface
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- 238000000034 method Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 239000005304 optical glass Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 230000004075 alteration Effects 0.000 abstract description 10
- 206010010071 Coma Diseases 0.000 abstract description 4
- 201000009310 astigmatism Diseases 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 240000004282 Grewia occidentalis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- WABPQHHGFIMREM-OIOBTWANSA-N lead-204 Chemical compound [204Pb] WABPQHHGFIMREM-OIOBTWANSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/28—Reflectors in projection beam
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention provides an adjustable ultra-short focus projection lens which comprises a refraction lens component, a deformed mirror surface unit and a reflector, wherein an image beam enters the deformed mirror surface unit after passing through the refraction lens component, enters the reflector after being reflected by the deformed mirror surface unit, and is finally imaged on a screen after being reflected. The ultra-short-focus projection lens has a simple structure, is easy to realize, overcomes the problem of poor image quality under the conditions of low projection ratio and different projection sizes of the traditional ultra-short-focus projection lens, skillfully introduces a method for adjusting the deformable mirror surface, can effectively compensate aberration such as distortion, field curvature, coma aberration, astigmatism and the like generated by lens processing, assembly, process and the like, and further improves the image projection quality.
Description
Technical Field
The invention belongs to the field of projection display lenses, and particularly relates to an adjustable ultra-short-focus projection lens.
Background
Through continuous development, projectors are widely applied to the fields of office, family, education, entertainment and the like, and become necessary choices of large indoor sizes. Particularly, with the advocation of eye health, projectors are widely used as eye protection first-choice.
The ultra-short-focus projection technology has a low projection ratio, and can realize a huge screen display effect at a short working distance, so that the ultra-short-focus projection technology is favored by consumers.
In practical applications, due to the processing, assembly, and process of the lens, aberrations such as distortion, field curvature, coma, and astigmatism may be generated, which affects the imaging quality, and the lens needs to be designed. The hybrid mode of the refraction lens group and the reflector group is the mainstream design mode of the ultra-short focus projection lens in the market at present.
One key parameter of the ultra-short focus projection technology is the throw ratio, and the lower the throw ratio, the better the ultra-short focus effect, but the higher the requirements on the lens. The projection ratio of the prior art is generally lower than 0.3 but higher than 0.2, and the lower the projection ratio is, the higher the requirement on the quality of the lens is, the lower the projection ratio is than 0.2, and the ideal screen image is required to be achieved, so the prior art is difficult to achieve; moreover, the traditional ultra-short focal lens is generally fixed in size, and ideal effects of various sizes are difficult to achieve if a display screen of 80-150 inches is considered.
Disclosure of Invention
In view of the above technical problems, the present invention provides an adjustable ultra-short focus projection lens, which can effectively solve the aberration problem of the ultra-short focus lens under a low throw ratio, and is suitable for a larger screen size range to obtain a clear picture.
In order to solve the problems, the invention provides an adjustable ultra-short focus projection lens, which changes the wave front appearance by introducing a deformable mirror unit into the traditional ultra-short focus lens group and changing the appearance of a reflector, thereby realizing the adjustment of wave front aberration and improving the imaging quality.
Specifically, the adjustable ultra-short focus projection lens of the present invention comprises: a refractive lens component, an anamorphic mirror unit, and a reflector. The image beam is incident to the deformable mirror unit after passing through the refractive lens assembly, is incident to the reflector after being reflected by the deformable mirror unit, and is finally imaged on a screen after being reflected.
The deformable mirror unit comprises a reflecting mirror, a piezoelectric material, a substrate and a lead, wherein the piezoelectric material is positioned between the reflecting mirror and the substrate, and the lead penetrates through the substrate and is connected with the piezoelectric material.
Furthermore, the reflecting mirror surface of the deformable mirror unit may be made of metal, or may be made of one of optical glass, silicon, and the like.
Furthermore, the reflecting mirror surface of the deformable mirror unit has a good resonant frequency of 500Hz or above and has a certain elastic deformation.
Furthermore, the piezoelectric material of the deformable mirror unit may be piezoelectric ceramic, or may be one of piezoelectric polymer and/or piezoelectric composite material.
Furthermore, the driving mode of the deformable mirror unit can adopt piezoelectric type, or other driving modes which can change the appearance of the reflecting surface, such as electromagnetic type, and the like.
Further, the reflector is a plane mirror or a free-form surface reflector.
Further, the base of the deformable mirror unit is made of a material having high rigidity such as silicon or ceramic and metal, and mainly functions to support the entire deformable mirror unit and serve as a fixed substrate.
Furthermore, the piezoelectric materials of the deformable mirror units can be arranged in an array mode or a four-corner mode.
Compared with the prior art, the invention can realize the following beneficial effects:
the adjustable ultra-short focus projection lens has a simple structure, is easy to realize, overcomes the problem of image quality deterioration under the condition of low projection ratio of the traditional ultra-short focus projection lens, skillfully introduces a method of adjusting a deformable mirror surface, can effectively compensate aberration such as distortion, field curvature, coma aberration, astigmatism and the like generated by lens processing, assembly, process and the like, and further improves the image projection quality.
Drawings
FIG. 1 is a light path diagram of the method of the present invention;
FIG. 2 is a schematic structural diagram of an anamorphic mirror element;
FIG. 3 is a top view of an anamorphic mirror element substrate and piezoelectric material;
FIG. 4 is a flow chart of the method of the present invention.
The reference numerals have the meanings: 1 is a refractive lens component, 2 is an anamorphic mirror unit, 3 is a mirror, 201 is a mirror surface, 202 is a piezoelectric material, 203 is a substrate, and 204 is a lead wire.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Examples
In an exemplary embodiment of the present invention, an adjustable ultra-short focus projection lens is provided, which includes a refractive lens assembly 1, an anamorphic mirror unit 2, and a reflector 3, wherein an image beam enters the anamorphic mirror unit 2 after passing through the refractive lens assembly 1, enters the reflector 3 after being reflected by the anamorphic mirror unit 2, and is finally imaged on a screen after being reflected.
The deformable mirror unit 2 comprises a mirror 201, a piezoelectric material 202, a substrate 203 and leads 204. The piezoelectric material is located between the mirror surface and the substrate, and the lead wires are connected to the piezoelectric material through the substrate.
The adjustable ultra-short-focus projection lens comprises the following working steps:
referring to fig. 1 to 4, the method of the present embodiment includes:
step 1: as shown in fig. 1, the light passes through the ultra-short focus lens set to eliminate most of the aberration and then is imaged on the screen;
step 2: as shown in fig. 2 and 3, forty-nine array elements of seven by seven are adopted, and the driving voltage of the lead 204 at the corresponding position of the deformed mirror unit is adjusted according to the definition of the picture on the screen;
and step 3: as shown in fig. 2 and 3, the lead driving voltage corresponding to the unclear position of the image causes the piezoelectric material 202 at the corresponding position to deform in a stretching manner;
and 4, step 4: the piezoelectric material drives the reflecting mirror 201 to deform slightly, so as to change the optical path difference and compensate the image difference, thereby improving the quality of the projected image.
In the embodiment, the core idea of the adjustable ultra-short focus projection lens overcomes the problem of poor image quality of the traditional ultra-short focus projection lens under the conditions of low projection ratio and different projection sizes, and the invention skillfully introduces a method for adjusting a deformable mirror surface to change the wave surface optical path difference, so that aberrations such as distortion, field curvature, coma aberration, astigmatism and the like generated by lens processing, assembly, process and the like can be effectively compensated, and the image projection quality is improved.
So far, the embodiments of the present invention have been described in detail with reference to the accompanying drawings. From the above description, those skilled in the art should clearly recognize that the phase difference wavefront sensor based on image compensation of the present invention.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the modifications or substitutions within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. An adjustable ultra-short-focus projection lens is characterized by comprising a refraction lens component (1), a deformed mirror surface unit (2) and a reflector (3), wherein an image beam enters the deformed mirror surface unit (2) after passing through the refraction lens component (1), enters the reflector (3) after being reflected by the deformed mirror surface unit (2), and is finally imaged on a screen after being reflected;
the deformable mirror unit (2) comprises a reflecting mirror surface (201), a piezoelectric material (202), a substrate (203) and a lead (204), wherein the piezoelectric material is positioned between the reflecting mirror surface and the substrate, and the lead penetrates through the substrate to be connected with the piezoelectric material.
2. The adjustable ultra-short focus projection lens of claim 1, wherein the deformable mirror unit has a reflective mirror surface made of one of metal, optical glass, and silicon.
3. The adjustable ultra-short focus projection lens of claim 1, wherein the resonant frequency of the mirror surface of the deformable mirror unit is 500Hz or more.
4. The adjustable ultra-short focus projection lens of claim 1, wherein the piezoelectric material of the deformable mirror unit is one of piezoelectric ceramic, piezoelectric polymer or piezoelectric composite material.
5. The adjustable ultra-short focus projection lens of claim 1, wherein the deformable mirror unit is driven by piezoelectric or electromagnetic.
6. The adjustable ultra-short focus projection lens of claim 1, wherein the reflector is a plane mirror or a free-form surface reflector.
7. The adjustable ultra-short focus projection lens as claimed in claim 1, wherein the substrate of the deformable mirror unit is made of a material with high rigidity such as silicon or ceramic and metal, and mainly functions as a support for the whole deformable mirror unit and a fixed substrate.
8. The adjustable ultra-short focus projection lens of claim 1, wherein the piezoelectric material of the deformable mirror unit is arranged in an array or a quadrangle.
9. The adjustable ultra-short focus projection lens of claim 87, wherein said array of piezoelectric materials of said deformable mirror unit is composed of two by two or more rows and columns.
10. The method for adjusting an ultra-short-focus projection lens by using the adjustable ultra-short-focus projection lens as claimed in claim 1, comprising the steps of:
step 1: the image is imaged on a screen through an ultra-short-focus projection lens;
step 2: adjusting the driving voltage in the lead (204) of the deformed mirror unit according to the clear condition of the picture on the screen;
and step 3: the driving voltage causes the piezoelectric material (202) to be deformed in a stretching way;
and 4, step 4: the piezoelectric material drives the reflecting mirror surface to generate micro deformation, so that the quality of the projected image is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110403086.2A CN112965220A (en) | 2021-04-15 | 2021-04-15 | Adjustable ultra-short-focus projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110403086.2A CN112965220A (en) | 2021-04-15 | 2021-04-15 | Adjustable ultra-short-focus projection lens |
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| Publication Number | Publication Date |
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| CN112965220A true CN112965220A (en) | 2021-06-15 |
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| CN202110403086.2A Pending CN112965220A (en) | 2021-04-15 | 2021-04-15 | Adjustable ultra-short-focus projection lens |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030117719A1 (en) * | 2001-09-17 | 2003-06-26 | Hiroshi Wakai | Optical system and imaging device |
| KR20060069233A (en) * | 2004-12-17 | 2006-06-21 | 한국전자통신연구원 | Image distortion control device and method of the projector system |
| CN108333879A (en) * | 2017-01-17 | 2018-07-27 | 上海微电子装备（集团）股份有限公司 | A kind of projection objective aberration correcting mechanism and method |
| US20200089015A1 (en) * | 2018-09-18 | 2020-03-19 | Disney Enterprises, Inc. | Free-viewpoint collimated display systems for collimated effects |
| CN215375921U (en) * | 2021-04-15 | 2021-12-31 | 南充明德之星科技有限公司 | Adjustable ultra-short-focus projection lens |
-
2021
- 2021-04-15 CN CN202110403086.2A patent/CN112965220A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030117719A1 (en) * | 2001-09-17 | 2003-06-26 | Hiroshi Wakai | Optical system and imaging device |
| KR20060069233A (en) * | 2004-12-17 | 2006-06-21 | 한국전자통신연구원 | Image distortion control device and method of the projector system |
| CN108333879A (en) * | 2017-01-17 | 2018-07-27 | 上海微电子装备（集团）股份有限公司 | A kind of projection objective aberration correcting mechanism and method |
| US20200089015A1 (en) * | 2018-09-18 | 2020-03-19 | Disney Enterprises, Inc. | Free-viewpoint collimated display systems for collimated effects |
| CN215375921U (en) * | 2021-04-15 | 2021-12-31 | 南充明德之星科技有限公司 | Adjustable ultra-short-focus projection lens |
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