CN105759403A - Micro projection lens - Google Patents
Micro projection lens Download PDFInfo
- Publication number
- CN105759403A CN105759403A CN201610244038.2A CN201610244038A CN105759403A CN 105759403 A CN105759403 A CN 105759403A CN 201610244038 A CN201610244038 A CN 201610244038A CN 105759403 A CN105759403 A CN 105759403A
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- lens
- eyeglass
- focal length
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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
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Abstract
The invention discloses a micro projection lens. The micro projection lens includes a first group lens, a diaphragm, a second group lens, a splitter, protective glass and an imaging surface, wherein the first group lens includes a first lens, a second lens, a third lens and a fourth lens; the second group lens includes a fifth lens, a sixth lens, a seventh lens and a eighth lens; the second lens and the seventh lens are aspherical lenses made of E48R materials; and other lenses are spherical lenses made of glass. The micro projection lens has the advantages of being small in size, being compact in structure, being low in cost and being high in the imaging quality, and utilizes a telecentric optical system design so as to effectively solve the defect that the first lens of the micro projection lens is easy to scrape and the projection lens is easy to shift focus because of heating.
Description
Technical field
The present invention relates to projection lens, especially relate to a kind of Miniature projection lens.
Background technology
Projection lens is the core component of projector equipment: light is after the reflective or light changing device of penetration, it is necessary to imaging in projection lens projects to projection screen.
Along with projector equipment role in life gets more and more, the field being applied to also can get more and more.More equipment needs to embed micro-projection device, and this is also more and more higher to the requirement of projection lens, smaller, and structure is compacter, and imaging effect is better, and cost is lower.
Existing projection lens on the market, the aspheric use of plastic cement all can be arranged far from the first eyeglass and last eyeglass of diaphragm, therefore following defect can be brought: 1, plastic cement aspheric surface easily can scratch because of plastic cement hardness is less than normal at first, 2, plastic lens is arranged on last one side can because plastic cement be heated and excessive causes that camera lens runs Jiao.
Summary of the invention
In order to solve the problems referred to above, it is as follows that the present invention designs a kind of Miniature projection lens configuration:
A kind of Miniature projection lens, it is characterised in that include first group's lens, diaphragm, second group's lens, light-splitting device, protection glass and imaging surface.
Further, a kind of Miniature projection lens, it is characterised in that described first group's lens and second group's lens are positive focal length；First group's focal length of lens should meet 14.3 < f9 < 16.8；Second group's focal length of lens should meet 10.0 < f10 < 12.5.
Further, a kind of Miniature projection lens, it is characterised in that described first group's lens include the first eyeglass, the second eyeglass, the 3rd eyeglass and the 4th eyeglass.
Further, a kind of Miniature projection lens, it is characterised in that described first eyeglass has negative power platycelous lens for adopting made by glass material, and its midplane is towards amplifying end, and two surfaces are sphere, and its effective focal length should meet-16.1 < f1 <-14.3；Second eyeglass has negative power selenodont lens for adopting made by E48R material, and two surfaces are aspheric surface, and its effective focal length should meet-26.2 < f2 < 23.5；3rd eyeglass has positive light coke lenticular lens for adopting made by glass material, and two surfaces are sphere, and its effective focal length should meet 19.1 < f3 < 21.4；4th eyeglass has positive light coke selenodont lens for adopting made by glass material, and wherein convex surface is towards amplifying end, and two surfaces are sphere, and its effective focal length should meet 18.2 < f4 < 20.6.
Further, a kind of Miniature projection lens, it is characterised in that described second group's lens include the 5th eyeglass, the 6th eyeglass, the 7th eyeglass and the 8th eyeglass.
Further, a kind of Miniature projection lens, it is characterised in that described 5th eyeglass has negative power double concave type lens for adopting made by glass material, and two surfaces are sphere, and its effective focal length should meet-7.2 < f5 <-5.2；6th eyeglass has positive light coke lenticular lens for adopting made by glass material, and two surfaces are sphere, and its effective focal length should meet 43.5 < f6 < 47.2；7th eyeglass has positive light coke lenticular lens for adopting made by E48R plastic material, and two surfaces are aspheric surface, and its effective focal length should meet 13.2 < f7 < 15.1；8th eyeglass has positive light coke lenticular lens for adopting made by glass material, and two surfaces are sphere, and its effective focal length should meet 25.0 < f8 < 27.3.
Compared with prior art, there is advantages that
A kind of Miniature projection lens is by designing, there is the beneficial effect that size is little, compact conformation, cost are low and image quality is high, and adopt telecentric optical system to design, effectively improve that Miniature projection lens the first lens easily scratch, projection lens is easily heated and runs burnt defect.
Accompanying drawing explanation
Fig. 1 is the optical structure chart of a kind of Miniature projection lens.
Fig. 2 is chip face, each visual field transmission function mtf value of a kind of Miniature projection lens.
Fig. 3 is the curvature of field and the distortion figure of a kind of Miniature projection lens.
Fig. 4 is the chromatic longitudiinal aberration figure of a kind of Miniature projection lens.
Specific embodiment
For the technological means making the present invention realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with being specifically illustrating, the present invention is expanded on further.
Fig. 1 show the optical structure chart of a kind of Miniature projection lens.A kind of Miniature projection lens, comprising: first group's lens 1, second group's lens 2, light-splitting device 3, protection glass 4, imaging surface 5 and diaphragm 6.Light sequentially passes through the first lens group 1, diaphragm 6, second group's lens 2, light-splitting device 3, protection glass 4 arrive imaging surface 5 and carries out imaging.Wherein first group's lens 1 include the first eyeglass G1, the second eyeglass P2, the 3rd eyeglass G3 and the four eyeglass G4；Second group's lens 2 include the 5th eyeglass G5, the 6th eyeglass G6, the 7th eyeglass P7 and the eight eyeglass G8.
Wherein the first eyeglass G1 has negative power platycelous lens for adopting made by glass material, and its midplane is towards amplifying end, and two surfaces S1, S2 are sphere, and its effective focal length should meet-16.1 < f1 <-14.3；Second eyeglass P2 has negative power selenodont lens for adopting made by E48R material, and two surfaces S3, S4 are aspheric surface, and its effective focal length should meet-26.2 < f2 < 23.5；3rd eyeglass G3 has positive light coke lenticular lens for adopting made by glass material, and two surfaces S5, S6 are sphere, and its effective focal length should meet 19.1 < f3 < 21.4；4th eyeglass G4 has positive light coke selenodont lens for adopting made by glass material, and wherein convex surface is towards amplifying end, and two surfaces S7, S8 are sphere, and its effective focal length should meet 18.2 < f4 < 20.6；5th eyeglass G5 has negative power double concave type lens for adopting made by glass material, and two surfaces S9, S10 are sphere, and its effective focal length should meet-7.2 < f5 <-5.2；6th eyeglass G6 has positive light coke lenticular lens for adopting made by glass material, and two surfaces S11, S12 are sphere, and its effective focal length should meet 43.5 < f6 < 47.2；7th eyeglass P7 has positive light coke lenticular lens for adopting made by E48R plastic material, and two surfaces S13, S14 are aspheric surface, and its effective focal length should meet 13.2 < f7 < 15.1；8th eyeglass G8 has positive light coke lenticular lens for adopting made by glass material, and two surfaces S15, S16 are sphere, and its effective focal length should meet 25.0 < f8 < 27.3.
Wherein first group's lens 1 focal length should meet 14.3 < f9 < 16.8；Second group's lens 2 focal length should meet 10.0 < f10 < 12.5.
The Miniature projection lens parameter of the present invention comprises the thickness of each eyeglass, spacing, the refractive index Nd(Refractiveindex of each eyeglass), radius of curvature R (Radiusofcurvature), numerical aperture F/NO., focal length F(FocusLength) and the Abbe number Vd(Abbenumber of each eyeglass).Table one specific as follows:
Table one
Wherein having several surface is aspheric surface, the surface S3 of the second eyeglass P2, S4 and the seven eyeglass P7 surface S13, S14, aspherical formula just can draw the curve that sphere is corresponding；Equation below:
Wherein: Z represent the point in aspheric surface from aspheric surface summit distance at optical axis direction；R represents the distance to optical axis of the point on non-surface；C represents aspheric curvature of centre；K represents rate of taper；A4, a6, a8, a10 represent aspheric surface high-order term coefficient.
The second each level number of eyeglass P2 and the seven eyeglass P7, such as table two:
Table two
The Miniature projection lens that design parameter according to each lens above-mentioned and imaging system draw is the Miniature projection lens of the present invention, and carries out every detection.
Fig. 2 is chip face, each visual field transmission function mtf value of a kind of Miniature projection lens.The Miniature projection lens of present invention full filed optical transfer function MTF > 51% under 93lp/mm spatial frequency as shown in the figure.
Fig. 3 is the curvature of field and the distortion figure of a kind of Miniature projection lens.As it can be seen, the Miniature projection lens curvature of field of the present invention is in-0.2 ~ 0.2 scope, aberration control is within 0.5%.
Fig. 4 is the chromatic longitudiinal aberration figure of a kind of Miniature projection lens.As it can be seen, the vertical aberration of the Miniature projection lens of the present invention is 4.0 microns to the maximum.
Can learning in sum, the Miniature projection lens of the present invention adopts telecentric optical system design, embodies this camera lens and not only solves easy scratch and be heated and run the defect of Jiao, also has that size is little, compact conformation, cost are low and the advantage of high imaging quality.
The foregoing is only the better embodiment of the present invention, those skilled in the art also can do other change in spirit of the present invention.These changes done according to present invention spirit, all should be included within present invention scope required for protection.
Claims (6)
1. a Miniature projection lens, it is characterised in that include first group's lens, diaphragm, second group's lens, light-splitting device, protection glass and imaging surface.
2. a kind of Miniature projection lens according to claim 1, it is characterised in that described first group's lens and second group's lens are positive focal length；First group's focal length of lens should meet 14.3 < f9 < 16.8；Second group's focal length of lens should meet 10.0 < f10 < 12.5.
3. a kind of Miniature projection lens according to claim 2, it is characterised in that described first group's lens include the first eyeglass, the second eyeglass, the 3rd eyeglass and the 4th eyeglass.
4. a kind of Miniature projection lens according to claim 3, it is characterized in that, described first eyeglass has negative power platycelous lens for adopting made by glass material, and its midplane is towards amplifying end, and two surfaces are sphere, its effective focal length should meet-16.1 < f1 <-14.3；Second eyeglass has negative power selenodont lens for adopting made by E48R material, and two surfaces are aspheric surface, and its effective focal length should meet-26.2 < f2 < 23.5；3rd eyeglass has positive light coke lenticular lens for adopting made by glass material, and two surfaces are sphere, and its effective focal length should meet 19.1 < f3 < 21.4；4th eyeglass has positive light coke selenodont lens for adopting made by glass material, and wherein convex surface is towards amplifying end, and two surfaces are sphere, and its effective focal length should meet 18.2 < f4 < 20.6.
5. a kind of Miniature projection lens according to claim 2, it is characterised in that described second group's lens include the 5th eyeglass, the 6th eyeglass, the 7th eyeglass and the 8th eyeglass.
6. a kind of Miniature projection lens according to claim 5, it is characterised in that described 5th eyeglass has negative power double concave type lens for adopting made by glass material, and two surfaces are sphere, and its effective focal length should meet-7.2 < f5 <-5.2；6th eyeglass has positive light coke lenticular lens for adopting made by glass material, and two surfaces are sphere, and its effective focal length should meet 43.5 < f6 < 47.2；7th eyeglass has positive light coke lenticular lens for adopting made by E48R plastic material, and two surfaces are aspheric surface, and its effective focal length should meet 13.2 < f7 < 15.1；8th eyeglass has positive light coke lenticular lens for adopting made by glass material, and two surfaces are sphere, and its effective focal length should meet 25.0 < f8 < 27.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244038.2A CN105759403B (en) | 2016-04-19 | 2016-04-19 | Miniature projection lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244038.2A CN105759403B (en) | 2016-04-19 | 2016-04-19 | Miniature projection lens |
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| CN105759403A true CN105759403A (en) | 2016-07-13 |
| CN105759403B CN105759403B (en) | 2022-09-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681037A (en) * | 2018-07-13 | 2018-10-19 | 嘉兴中润光学科技有限公司 | It can be seen that with infrared synchronous imaging lens |
| CN109445075A (en) * | 2018-12-29 | 2019-03-08 | 深圳市点睛创视技术有限公司 | A kind of Miniature projection lens |
| CN112269241A (en) * | 2020-11-20 | 2021-01-26 | 四川长虹电器股份有限公司 | Projection lens suitable for DLP photocuring 3D printing |
| CN108681037B (en) * | 2018-07-13 | 2024-05-17 | 嘉兴中润光学科技股份有限公司 | Visible and infrared synchronous imaging lens |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6353504B1 (en) * | 1999-09-20 | 2002-03-05 | Fuji Photo Optical Co., Ltd. | Objective lens for endoscope |
| CN103048777A (en) * | 2011-10-17 | 2013-04-17 | 精工爱普生株式会社 | Projection zoom lens |
| CN203275751U (en) * | 2013-05-10 | 2013-11-06 | 中山联合光电科技有限公司 | High definition resolution and 210 degree super large wide angle optical system capable of being used day and night |
| CN103676114A (en) * | 2012-09-07 | 2014-03-26 | 索尼公司 | Imaging lens and imaging apparatus |
| CN104076486A (en) * | 2014-01-25 | 2014-10-01 | 徐中一 | Full-width lens of digital camera |
| CN104965298A (en) * | 2015-06-30 | 2015-10-07 | 东莞市宇瞳光学科技有限公司 | Small-size wide-angle zoom lens |
| CN105445908A (en) * | 2015-12-24 | 2016-03-30 | 中山联合光电科技股份有限公司 | High-image quality, large-image frame and small-distortion optical imaging system |
| CN205121048U (en) * | 2015-09-10 | 2016-03-30 | 深圳市点睛创视技术有限公司 | Miniature projecting lens |
-
2016
- 2016-04-19 CN CN201610244038.2A patent/CN105759403B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6353504B1 (en) * | 1999-09-20 | 2002-03-05 | Fuji Photo Optical Co., Ltd. | Objective lens for endoscope |
| CN103048777A (en) * | 2011-10-17 | 2013-04-17 | 精工爱普生株式会社 | Projection zoom lens |
| CN103676114A (en) * | 2012-09-07 | 2014-03-26 | 索尼公司 | Imaging lens and imaging apparatus |
| CN203275751U (en) * | 2013-05-10 | 2013-11-06 | 中山联合光电科技有限公司 | High definition resolution and 210 degree super large wide angle optical system capable of being used day and night |
| CN104076486A (en) * | 2014-01-25 | 2014-10-01 | 徐中一 | Full-width lens of digital camera |
| CN104965298A (en) * | 2015-06-30 | 2015-10-07 | 东莞市宇瞳光学科技有限公司 | Small-size wide-angle zoom lens |
| CN205121048U (en) * | 2015-09-10 | 2016-03-30 | 深圳市点睛创视技术有限公司 | Miniature projecting lens |
| CN105445908A (en) * | 2015-12-24 | 2016-03-30 | 中山联合光电科技股份有限公司 | High-image quality, large-image frame and small-distortion optical imaging system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681037A (en) * | 2018-07-13 | 2018-10-19 | 嘉兴中润光学科技有限公司 | It can be seen that with infrared synchronous imaging lens |
| CN108681037B (en) * | 2018-07-13 | 2024-05-17 | 嘉兴中润光学科技股份有限公司 | Visible and infrared synchronous imaging lens |
| CN109445075A (en) * | 2018-12-29 | 2019-03-08 | 深圳市点睛创视技术有限公司 | A kind of Miniature projection lens |
| CN109445075B (en) * | 2018-12-29 | 2024-04-16 | 深圳市点睛创视技术有限公司 | Miniature projection lens |
| CN112269241A (en) * | 2020-11-20 | 2021-01-26 | 四川长虹电器股份有限公司 | Projection lens suitable for DLP photocuring 3D printing |
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| CN105759403B (en) | 2022-09-13 |
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