CN203337908U - Eight-stack nine-patch digital short-focus projection lens infrastructure - Google Patents
Eight-stack nine-patch digital short-focus projection lens infrastructure Download PDFInfo
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- CN203337908U CN203337908U CN2013204485553U CN201320448555U CN203337908U CN 203337908 U CN203337908 U CN 203337908U CN 2013204485553 U CN2013204485553 U CN 2013204485553U CN 201320448555 U CN201320448555 U CN 201320448555U CN 203337908 U CN203337908 U CN 203337908U
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- 239000000463 material Substances 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000005304 optical glass Substances 0.000 claims description 12
- 230000004075 alteration Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 210000001747 pupil Anatomy 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model discloses an eight-stack nine-patch digital short-focus projection lens infrastructure which comprises a projection lens body. The projection lens body, in the direction opposite to a screen, is successively provided with a first lens group, a second lens group, a diaphragm and a third lens group. With the application of the infrastructure form, the digital short-focus projection lens is designed. The lens infrastructure only has an even aspheric surface, and can fit with usage of various digital projectors of 3LCD or DMD type with display chip size being 0.55-0.98 inch. Maximum clear aperture can reach F/2.0; maximum throw ratio can reach 0.48:1; and maximum retrofocus ratio can reach 6 times. The projection lens infrastructure is used for short-distance large-frame projection, guarantees definition and brightness of a projection picture, and provides maximum possibility for wide popularization and application of digital short-focus projection. The problem that a traditional technology cannot be popularized and applied due to high requirements and low brightness of a projection picture is solved.
Description
Technical field
The utility model relates to a kind of short out-of-focus projection lens construction, particularly the short out-of-focus projection of a kind of numeral of eight group of nine chip camera lens foundation structure.
Background technology
Between projector and screen the distance to picture dimension, be directly proportional, projector from screen more close to, the picture dimension projected is less, on the contrary picture is larger.Yet, if projector space is little, but, while needing again to show a larger picture, just have to projector is placed on to the maximal projection distance.Especially on mini-session, people can only sit around and stand light dazzling before having in mind and the noise of fan in the place ahead of projector and carry out conference presentation and exchange.If the speaker before screen shelters from unintentionally light often, therefore the people who watches under platform more can be greatly affected.So, in limited space, with the shortest distance, realize that maximum clear picture just becomes a new demand place in current and following practical application, be also the inexorable trend of projection field development.And short Jiao (wide-angle) shadow casting technique becomes the gordian technique that solves this bottleneck.
At present, short out-of-focus projection technology is widely used in the numeral teaching field and take edge fusion technology as basic modernization numbers show engineering field, ，Ru exhibition center, field, museum, science and technology center, the Art Museums etc. such as hyperchannel Circamara, advertising.Along with popularizing of numeral teaching and digital display and demonstration means, on market, the demand of the short out-of-focus projection of numeral technology is the trend of rapid growth.
Architectural characteristic due to digital projector light engine itself, require projection lens have at least 4 times instead more than, while is due to the restriction of digital projector brightness, just require projection lens should there is larger relative aperture, and simple optical texture, reduce the optical energy loss of camera lens itself as far as possible.At present, the short out-of-focus projection of existing numeral lens construction generally comprises 11～14 lens, and physical dimension is larger, especially little projection is than the optical texture of (the same projection distance, project than less, and projection image is larger), it has 11～13 lens, and contain 2～4 aspheric surfaces, in addition, the relative aperture of existing optical texture all generally is less than 1/2.4.Therefore, the short out-of-focus projection of existing numeral camera lens, its structure is comparatively complicated, physical dimension is large, production technology is poor, production cost is higher, yield rate is lower, causes that the camera lens selling price is expensive, manufacturing technique requirent is high and projected picture brightness is low and can't be applied on a large scale.So existing digital short-focus lens structure needs further Improvement and perfection.
Summary of the invention
In view of the situation of above-mentioned prior art, the utility model provides the short out-of-focus projection of a kind of eight group of nine chip numeral camera lens foundation structure, has minimum 0.48:1 projection ratio, and the relative aperture maximum reaches 1/2.0.Under the prerequisite that guarantees the overall aberration excellence, simplify the structure to greatest extent, dwindled physical dimension, improved production technology and projected picture brightness, reduced production cost.This camera lens foundation structure only has an even aspheric surface, can meet the use of the various digital projectors of the 3LCD of 0.55～0.98 inch or single DMD type.
The technical scheme that the utility model adopts is: the eight group of nine short out-of-focus projection of chip numeral camera lens foundation structure, comprise the projection lens body, the first lens group, the second lens group, diaphragm and the 3rd lens group that set gradually in the corresponding screen direction of described projection lens body; Wherein:
First lens in the first lens group is negative curved month type, and convex surface forward, the second lens are negative curved month type, and convex surface forward, the 3rd lens are double concave type, and the curvature absolute value is forward-facing little;
The 4th lens in the second lens group are negative curved month type, and convex surface forward, the 5th lens are biconvex, and the curvature absolute value is forward-facing large;
The 6th lens in the 3rd lens group and the 7th lens are two gummed mirror groups, described the 6th lens are biconvex, the curvature absolute value is forward-facing little, the 7th lens are double concave type, the curvature absolute value is forward-facing large, and the 8th lens are biconvex, and the curvature absolute value is forward-facing little, the 9th lens are biconvex, and the curvature absolute value is forward-facing large;
Described diaphragm is arranged between the second lens group and the 3rd lens group and the position of close the 3rd lens group;
The focal power absolute value of described first lens group, the second lens group and the 3rd lens group is followed successively by 1: 0.314: 0.686 than from front to back, wherein first lens group's focal power is negative value, the focal power sum of the second lens group and the 3rd lens group be on the occasion of, and both absolute values ratio is 1: 0.8;
The convex surface face type of the first lens in described first lens group is the even aspheric surface, and concave surface face type is sphere, and the second lens, the 3rd lens are spherical lens;
The 4th lens, the 5th lens in described the second lens group are spherical lens;
The 6th lens in described the 3rd lens group, the 7th lens, the 8th lens, the 9th lens are spherical lens.
In this is novel, described first lens is that employing optical plastic or crown are the optical glass material; It is the optical glass material that described the second lens, the 3rd lens adopt heavy crown.
In this is novel, described the 4th lens, the 5th lens adopt successively the lanthanum crown to be or heavy crown is, dense flint is the optical glass material.
In this is novel, it is the optical glass material that described the 6th lens, the 7th lens, the 8th lens, the 9th lens adopt heavy crown system, dense flint system, heavy crown system or crown system, heavy crown system or crown successively.
In this is novel, the optical performance parameter scope of the short out-of-focus projection of related numeral camera lens is: focal distance f ＇=6mm～11mm; Relative aperture D/ f ＇=1/2.0～1/2.2; Projection is than being 1.0: 1～0.48: 1; Instead more than being 4～6; Wherein D is the entrance pupil diameter.
This is novel described anti-more than the ratio that refers to lens optical rear cut-off distance L ＇ and focal distance f ＇.
In this is novel, the short out-of-focus projection of related numeral camera lens foundation structure is carried out the focal length convergent-divergent in proportion, and a little suitable matching relationship of adjusting each main aberration, can meet the application that two kinds of target surfaces of LCD and DMD are of a size of single target surface or the various digital projectors of three target surfaces of 0.55～0.98 inch fully.
In this is novel, the applicable look wavelength coverage of the short out-of-focus projection of related numeral lens construction is: 430～685nm.
The beneficial effect the utlity model has is: the short out-of-focus projection of the numeral of using this foundation structure creation of forms to design camera lens, by eight groups of nine lens, formed, and only contain an aspheric surface, it is the optical glass material that non-spherical lens adopts the most frequently used optical plastic or crown, spherical lens all adopts commonly used, price is low, the Chinese trade mark optical glass of stable performance, the clear aperature maximum can reach F/2.0, projection can reach 0.48:1 than maximum, instead more than maximum, can reach 6 times, and have outstanding image quality, can be used for connecting the display chip size fully at the 3LCD of 0.55～0.98 inch or the various digital projectors of single DMD type, projection for the large picture of short distance, and sharpness and the brightness of projected picture have been guaranteed.Simultaneously, this is simple in structure, small, production technology is good, greatly reduces production cost and resetting difficulty.In addition, non-spherical lens material in this structure is in the situation that the employing crown is optical glass, by computing machine CNC Lapping & Polishing method, aspheric surface is processed, be suitable for the production and processing of smallest number, the non-spherical lens material is in the situation that adopt optical plastic, with injection molding method, aspheric surface is processed, be suitable for large batch of production and processing, for the short out-of-focus projection of numeral applies on a large scale, provided great possibility.
The accompanying drawing explanation
Fig. 1 is this novel structural representation;
Fig. 2 is the ray tracing schematic diagram of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
The eight group of nine short out-of-focus projection of chip numeral camera lens foundation structure as shown in Figure 1, comprise the projection lens body, the first lens group 11, the second lens group 12, diaphragm 13 and the 3rd lens group 14 that set gradually corresponding to screen A direction at described projection lens body.The described first lens group 11 of the present embodiment, the second lens group 12 and the 3rd lens group 14 are by arranged spaced, and wherein diaphragm 13 is arranged between the second lens group 12 and the 3rd lens group 14 and the position of close the 3rd lens group 14.The corresponding screen A of the described first lens group 11 of the present embodiment direction sets gradually first lens 1101, the second lens 1102 and the 3rd lens 1103 form three mirror groups, wherein first lens 1101 is negative curved month types, convex surface (is established camera lens when the projection duty forward, screen A end is for front), convex surface face type is high-order even aspheric surface, play balance off-axis aberration, improve relative aperture, increase field angle, the effect of simplified structure, the second lens 1102 are negative curved month type, convex surface forward, the 3rd lens 1103 are double concave type, the curvature absolute value is forward-facing little, play the effect that reduces preposition eyeglass bore.Described the second lens group 12 of the present embodiment comprises that the 4th lens 1201 and the 5th lens 1202 form two mirror groups, wherein the 4th lens 1201 are negative curved month type, convex surface forward, the 5th lens 1202 are biconvex, the curvature absolute value is forward-facing large, plays the dispersed light focal power, reduces the senior aberration amount.Described the 3rd lens group 14 of the present embodiment comprises the 6th lens 1401-1, the 7th lens 1401-2, the 8th lens 1402 and the 9th lens 1403, wherein the 6th lens 1401-1 and the 7th lens 1401-2 form a cemented doublet group, work to proofread and correct paraxial spherical aberration and aberration, the 6th lens 1401-1 is biconvex, the curvature absolute value is forward-facing little, the 7th lens 1401-2 is double concave type, the curvature absolute value is forward-facing large, it is biconvex that the 8th lens 1402 form a mirror group, the curvature absolute value is forward-facing little, it is biconvex that the 9th lens 1403 form a mirror group, the curvature absolute value is forward-facing large.It is the optical glass material that the 8th lens 1402 in the present embodiment and the 9th lens 1403 all adopt heavy crown system or crown, play a part to widen back work distance from.The total several lens of the projection lens of the present embodiment form eight mirror groups and form.In above-mentioned, the focal power absolute value of described first lens group 11, the second lens group 12, the 3rd lens group 14 is followed successively by 1: 0.314: 0.686 than from front to back, described first lens group's 11 focal power is negative value, the focal power sum of the second lens group 12 and the 3rd lens group 14 be on the occasion of, and both absolute values ratio is 1: 0.8.
In above-mentioned, the convex surface face type of the first lens 1101 in first lens group 11 is the even aspheric surface, and concave surface face type is sphere, and the second lens 1102, the 3rd lens 1103 are spherical lens,
The 4th lens 1201 in the second lens group 12, the 5th lens 1202 are spherical lens, and the 6th lens 1401-1 in the 3rd lens group 14, the 7th lens 1401-2, the 8th lens 1402, the 9th lens 1403 are spherical lens.
In the present embodiment, described camera lens fundamental performance parameter is: focal distance f ＇=7.7mm; Relative aperture D/ f ＇=1/2.1; Projection is than being 0.51: 1; More than (ratio of lens optical rear cut-off distance L ＇ and focal distance f ＇), be instead 4.4; Wherein D is the entrance pupil diameter.
In the present embodiment, after related digital short-focus lens structure bi-directional scaling, can meet the application that two kinds of target surfaces of LCD and DMD are of a size of single target surface or the various digital projectors of three target surfaces of 0.55～0.98 inch.
In order to absolutely prove the present embodiment, when the camera lens equivalent focal length is 1mm, its Optic structure parameter is as follows:
| Sequence number | Spherical radius/mm | Spacer thickness/mm | Material | Remarks |
| S1 | 11.149 | 0.78 | PMMA | ? |
| S2 | 5.941 | 2.094 | ? | ? |
| S3 | 9.595 | 0.65 | H-ZK11 | ? |
| S4 | 4.400 | 2.511 | ? | ? |
| S5 | -140.232 | 0.325 | H-ZK9A | ? |
| S6 | 5.804 | 9.402 | ? | ? |
| S7 | 6.950 | 0.638 | H-LAK3 | ? |
| S8 | 3.412 | 2.212 | ? | ? |
| S9 | 5.334 | 1.076 | H-ZF6 | ? |
| S10 | -44.792 | 3.265 | ? | ? |
| STO | Infinity | 0.069 | ? | ? |
| S12 | 12.783 | 0.862 | H-ZK3 | ? |
| S13 | -3.014 | 0.79 | H-ZF13 | ? |
| S14 | 5.570 | 0.131 | ? | ? |
| S15 | 9.858 | 0.523 | H-ZK11 | ? |
| S16 | -5.888 | 0.121 | ? | ? |
| S17 | 4.882 | 0.563 | H-ZK11 | ? |
| S18 | -20.398 | 2.341 | ? | ? |
| S19 | Infinity | 2.601 | H-K9L | Light engine prism simulation size |
| S20 | Infinity | 0.325 | ? | ? |
S1 aspheric surface parameter:
| Conic constant (K) | 1.856 |
| 4 rank coefficients (A) | 2.712e-004 |
| 6 rank coefficients (B) | 2.529e-006 |
| 8 rank coefficients (C) | -2.947e-008 |
| 10 rank coefficients (D) | -3.209e-009 |
| 12 rank coefficients (E) | 8.709e-011 |
Fig. 2 has provided the ray tracing schematic diagram of the utility model embodiment.As can be seen from the figure the feature light a of each specific visual field of digital short-focus lens structure moves towards, and feature light a is at the incoming position of each lens surface.
Above-mentioned given embodiment, only for explaining embodiment of the present utility model and the beneficial effect had, not for limiting protection domain of the present utility model.
Claims (7)
1. the one kind eight groups nine short out-of-focus projection of chips numerals camera lens foundation structures, comprise the projection lens body, the first lens group (11), the second lens group (12), diaphragm (13) and the 3rd lens group (14) that set gradually in the corresponding screen direction of described projection lens body; Wherein:
First lens (1101) in first lens group (11) is negative curved month type, and convex surface forward, the second lens (1102) are negative curved month type, and convex surface forward, the 3rd lens (1103) are double concave type, and the curvature absolute value is forward-facing little;
The 4th lens (1201) in the second lens group (12) are negative curved month type, and convex surface forward, the 5th lens (1202) are biconvex, and the curvature absolute value is forward-facing large;
The 6th lens (1401-1) in the 3rd lens group (14) and the 7th lens (1401-2) are two gummed mirror groups, described the 6th lens (1401-1) are biconvex, the curvature absolute value is forward-facing little, the 7th lens (1401-2) are double concave type, the curvature absolute value is forward-facing large, and the 8th lens (1402) are biconvex, and the curvature absolute value is forward-facing little, the 9th lens (1403) are biconvex, and the curvature absolute value is forward-facing large;
Described diaphragm (13) is arranged between the second lens group (12) and the 3rd lens group (14) and the position of close the 3rd lens group;
The focal power absolute value of described first lens group (11), the second lens group (12) and the 3rd lens group (14) is followed successively by 1: 0.314: 0.686 than from front to back, wherein first lens group's (11) focal power is negative value, the focal power sum of the second lens group (12) and the 3rd lens group (14) be on the occasion of, and both absolute values ratio is 1: 0.8;
The convex surface face type of the first lens (1101) in described first lens group (11) is the even aspheric surface, and concave surface face type is sphere, and the second lens (1102), the 3rd lens (1103) are spherical lens;
The 4th lens (1201), the 5th lens (1202) in described the second lens group (12) are spherical lens;
The 6th lens (1401-1) in described the 3rd lens group (14), the 7th lens (1401-2), the 8th lens (1402), the 9th lens (1403) are spherical lens.
2. the short out-of-focus projection of eight group of nine chip numeral according to claim 1 camera lens foundation structure, is characterized in that, described first lens (1101) is that employing optical plastic or crown are the optical glass material; It is the optical glass material that described the second lens (1102), the 3rd lens (1103) adopt heavy crown.
3. the short out-of-focus projection of eight group of nine chip numeral according to claim 1 camera lens foundation structure, is characterized in that, described the 4th lens (1201), the 5th lens (1202) adopt successively the lanthanum crown to be or heavy crown is, dense flint is the optical glass material.
4. the short out-of-focus projection of eight group of nine chip numeral according to claim 1 camera lens foundation structure, it is characterized in that, it is the optical glass material that described the 6th lens (1401-1), the 7th lens (1401-2), the 8th lens (1402), the 9th lens (1403) adopt heavy crown system, dense flint system, heavy crown system or crown system, heavy crown system or crown successively.
5. the short out-of-focus projection of eight group of nine chip numeral according to claim 1 camera lens foundation structure, is characterized in that, the optical performance parameter scope of the short out-of-focus projection of described numeral camera lens is: focal distance f ＇=6mm～11mm; Relative aperture D/ f ＇=1/2.0～1/2.2; Projection is than being 1.0: 1～0.48: 1; Instead more than being 4～6; Wherein D is the entrance pupil diameter.
6. the short out-of-focus projection of eight group of nine chip numeral according to claim 1 camera lens foundation structure, it is characterized in that, the short out-of-focus projection of described numeral camera lens foundation structure is carried out the focal length convergent-divergent in proportion, and a little suitable matching relationship of adjusting each main aberration, can meet the application that two kinds of target surfaces of LCD and DMD are of a size of single target surface or the various digital projectors of three target surfaces of 0.55～0.98 inch fully.
7. the short out-of-focus projection of eight group of nine chip numeral according to claim 1 camera lens foundation structure, is characterized in that, the applicable look wavelength coverage of the short out-of-focus projection of described numeral lens construction is: 430～685nm.
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| CN2013204485553U CN203337908U (en) | 2013-07-26 | 2013-07-26 | Eight-stack nine-patch digital short-focus projection lens infrastructure |
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| CN2013204485553U CN203337908U (en) | 2013-07-26 | 2013-07-26 | Eight-stack nine-patch digital short-focus projection lens infrastructure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652421A (en) * | 2016-04-01 | 2016-06-08 | 江苏大学 | Camera lens for digital projector |
| CN107167992A (en) * | 2017-06-02 | 2017-09-15 | 合肥科视激光科技有限公司 | A kind of telecentricity digital projector camera lens of the small projection ratio of wide-angle |
| CN108181700A (en) * | 2018-02-09 | 2018-06-19 | 深圳市帅映科技股份有限公司 | A kind of short-focus lens of optical projection system |
| TWI628462B (en) * | 2017-07-07 | 2018-07-01 | 上暘光學股份有限公司 | Telecentric lens system |
| CN110471243A (en) * | 2019-08-21 | 2019-11-19 | 宁波锦辉光学科技有限公司 | A kind of high brightness and resolution is big apart from automobile LOGO projection optical system |
| CN115047605A (en) * | 2022-07-05 | 2022-09-13 | 陈明君 | Imaging lens |
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2013
- 2013-07-26 CN CN2013204485553U patent/CN203337908U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652421A (en) * | 2016-04-01 | 2016-06-08 | 江苏大学 | Camera lens for digital projector |
| CN107167992A (en) * | 2017-06-02 | 2017-09-15 | 合肥科视激光科技有限公司 | A kind of telecentricity digital projector camera lens of the small projection ratio of wide-angle |
| CN107167992B (en) * | 2017-06-02 | 2019-11-05 | 合肥翰视激光科技有限公司 | A kind of telecentricity digital projector camera lens of the small projection ratio of wide-angle |
| TWI628462B (en) * | 2017-07-07 | 2018-07-01 | 上暘光學股份有限公司 | Telecentric lens system |
| CN108181700A (en) * | 2018-02-09 | 2018-06-19 | 深圳市帅映科技股份有限公司 | A kind of short-focus lens of optical projection system |
| CN110471243A (en) * | 2019-08-21 | 2019-11-19 | 宁波锦辉光学科技有限公司 | A kind of high brightness and resolution is big apart from automobile LOGO projection optical system |
| CN115047605A (en) * | 2022-07-05 | 2022-09-13 | 陈明君 | Imaging lens |
| CN115047605B (en) * | 2022-07-05 | 2024-01-19 | 湖北准视光电科技有限公司 | Imaging lens |
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Address after: No. 165, middle section of Hebei Avenue, seaport area, Qinhuangdao, Hebei Province Patentee after: Qinhuangdao audio-visual Machinery Research Institute Co.,Ltd. Address before: No. 165, middle section of Hebei Avenue, seaport area, Qinhuangdao, Hebei Province Patentee before: QINHUANGDAO AUDIO-VISUAL MACHINERY Research Institute |
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Granted publication date: 20131211 |