CN100437190C - Two sets mobile variable-focus projection lens - Google Patents
Two sets mobile variable-focus projection lens Download PDFInfo
- Publication number
- CN100437190C CN100437190C CNB2006101069387A CN200610106938A CN100437190C CN 100437190 C CN100437190 C CN 100437190C CN B2006101069387 A CNB2006101069387 A CN B2006101069387A CN 200610106938 A CN200610106938 A CN 200610106938A CN 100437190 C CN100437190 C CN 100437190C
- Authority
- CN
- China
- Prior art keywords
- lens
- mobile
- lens group
- negative
- picture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Lenses (AREA)
Abstract
The invention relates to a two groups of movable variable-focus projection lens, wherein it is characterized in that: the optical system of lens is formed by front movable lens group U1 with passive focal power and the back movable lens group U2 with positive focal power; the front and back lens groups along optical axle are arranged from screen to image plane, and move from wide angle end to remote end to change focus. The invention can avoid general front and back fixed lens groups, and all lens use spherical lens, to confirm the image quality, reduce the lens number, and reduce the cost.
Description
Technical field
The invention belongs to the optical instrument technical field, is matching used two sets mobile variable-focus projection lens on a kind of DLP of being adapted at projector.
Background technology
The DLP projection display technique develops rapidly in recent years, and its development trend is that the image of giant-screen, high definition, high brightness shows, and more can realize modern product characteristics such as volume is little, in light weight.The more employing of core component in the DLP technology be DMD digital picture chip, DMD is the digital picture chip of exclusive exploitation of TIX and grasp, because its time that emerges is shorter relatively, therefore the technology of the DLP projection imaging optical system that is complementary with the DMD technology is few, and existing LCD, what projection lens such as LCOS adopted is telecentric system, can not satisfy the supporting requirement of DMD digital picture chip, mainly be because the miniature reflective mirror on the DMD has the upset of 10 or 12 degree with image digital signal when work, to enter the entrance pupil of projection lens by the upset back reflection of little reflective mirror from the light beam of lighting source, and focus on the screen.
In existing technology, disclosed Zooming-projection camera lens, a part has been used the aspheric surface technology, promptly improves the image quality of system in the optical system of Zooming-projection camera lens by the adding non-spherical lens.But the non-spherical lens of using is unfavorable for the raising of production efficiency and the reduction of cost to its processing and matching requirements strictness.Other do not adopt in the technology of non-spherical lens, in order to reach optical property preferably, its technical measures one are the quantity that increases combination of lenses, generally more than 12, the 2nd, the high gear optical material of the high index of refraction of the external import of employing, the material of FCD1 that aberration is significantly improved and so on for example, it costs an arm and a leg, manufacturability is poor, working (machining) efficiency and yield rate are very low, can not satisfy the manufacturability requirement of production in enormous quantities.In the disclosed a kind of Zooming-projection camera lens of Jap.P. 02120574 technology, the material that is adopted just comprises high-grade materials such as FCD1, LAF, and lens numbers is all more than 12, thereby has problems such as cost height, work efficiency be low too.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can be complementary, and compact conformation, lens numbers is few, cost is low, production efficiency is high, be fit to the two sets mobile variable-focus projection lens of requirements of mass production with DMD digital picture chip.
For reaching such purpose, Zooming-projection camera lens provided by the present invention, its optical system is made up of front moving lens group U1 with negative power and the back mobile lens group U2 with positive light coke, wherein, front moving lens group U1, back mobile lens group U2 along optical axis from screen side to the series arrangement of image planes side, and from wide-angle side to the end of dolly-out,ing dolly-back along the optical axis realization zoom that relatively moves, promptly this Zooming-projection camera lens is a two sets mobile variable-focus, the combined focal length of front moving lens group is f1, the focal distance f 2 of back mobile lens group, both opposite in signs, and satisfy inequality: 0.86＜| f1/f2|＜1.17.
Described front moving lens group U1 is made up of positive lens L1, negative lens L2, negative lens L3, positive lens L4 to the image planes direction from screen side, and its combined focal length is for negative;
U2 in the mobile lens group of described back is made up of positive lens L5, negative lens L6, positive lens L7, negative lens L8, balsaming lens L9, L10 to the image planes direction from screen side, and its combined focal length is for just.
Positive lens L1 among the described front moving lens group U1 is a biconvex lens, and negative lens L2 is that meniscus lens, negative lens L3 are biconcave lens, and positive lens L4 is a biconvex lens.
Balsaming lens L9, L10 among the described back mobile lens group U2 formed by the lens L9 of crown glass material and the lens L10 gummed of flint glass material, and wherein, the crown glass lens are positioned at image planes one side.
System Guang Lan be arranged among the mobile lens group U2 of back near the picture planar side positive lens L7 position, and in the zoom process, move, and system's hurdle bore remains unchanged with lens combination U2, crossing from the chief ray and the optical axis of picture plane outgoing on the light hurdle.
Among the mobile lens group U2 of described back near directly leaning on mutually with lens L9 among balsaming lens L9, the L10 as the negative lens L8 of planar side.
All lens are spherical lens among front moving lens group U1 and the back mobile lens group U2, and lens add up to 10.
For fully improving the image planes homogeneity, the distance of exit pupil of this projection lens is controlled in the scope that the reflected light angle with the DMD micro-reflector is complementary, in addition, simple and feasible for structure, the bore of the tail end of projection lens is provided with minimum, to guarantee having enough spaces to make illumination path can obtain effective and reasonable layout.The rear portion bore of projection lens can not be provided with too little, with the F number of assurance total system and the illuminance uniformity of imaging surface.
The invention has the advantages that:
1, the non-spherical lens of adopting process complexity not in the system, thereby improved the simplification of lens and zoom lens processing and assembling, improved finished product rate and production efficiency, can satisfy the manufacturability needs of production in enormous quantities.
2, when guaranteeing image quality, constitute total system with the spherical lens of lesser amt, and adopt conventional optical material, can reduce cost of products significantly.
3, pass through the consistance of the interior image quality of the whole focal range of mobile assurance of two lens combination, and can keep the aberration correction of higher level, fixed lens group before and after having saved in the structure, so structure is more compact.
4, the present invention is provided with the short distance of exit pupil that is complementary with DMD digital picture chip and guarantees system, being significantly improved of its luminous energy output and contrast.
5, the present invention has advantages such as compact conformation, focusing are accurately convenient, projection image is clear.
Description of drawings
Fig. 1 is the structural representation of zoom lens of the present invention;
Fig. 2 is the short burnt optical system diagram of zoom lens of the present invention;
Fig. 3 is a varifocal mirror head length Jiao's of the present invention optical system diagram;
Fig. 4 is that zoom lens of the present invention is at short burnt ray trajectory figure;
Fig. 5 is that zoom lens of the present invention is at long burnt ray trajectory figure;
Fig. 6 is that zoom lens of the present invention is at short burnt curvature of field line and distortion curve figure;
Fig. 7 is curvature of field line and the distortion curve figure of zoom lens of the present invention middle Jiao;
Fig. 8 is that zoom lens of the present invention is at long burnt curvature of field line and distortion curve figure;
Fig. 9 is that zoom lens of the present invention is at short burnt transfer curve figure;
Figure 10 is the transfer curve figure of zoom lens of the present invention middle Jiao;
Figure 11 is that zoom lens of the present invention is at long burnt transfer curve figure;
Figure 12 is that zoom lens of the present invention is at short burnt vertical axial aberration curve map;
Figure 13 is the vertical axial aberration curve map of zoom lens of the present invention middle Jiao;
Figure 14 is that zoom lens of the present invention is at long burnt vertical axial aberration curve map.
Embodiment
In conjunction with Fig. 1, referring to Fig. 2, Fig. 3, two sets mobile variable-focus projection lens of the present invention, lens barrel 1, roller 2,5,7, zoom support 3, big spacing ring 4, zoom lens barrel 6, guiding lens barrel 8, septulum circle 9, back lens barrel 10, image planes lens barrel 11 and optical system before comprising, each member is assembling in the usual way all.In this case, except that optical system, all the other members are known technology, and its structure repeats no more.Described optical system adopts two groups of 10 lens arrangements of front moving lens group U1 and back mobile lens group U2, and this system can focus by moving forward and backward of front moving lens group U1 for the projected image of different distance.In Fig. 2,3, U1 is the front moving lens group, and U2 is a back mobile lens group, and dw is short two intervals of moving between group U1 and U2 when burnt, and dt is long interval between U1 and U2 when burnt.The present invention is two groups of zoom system, pancreatic systems that relatively move, just light beam is through later no longer directly forming real image through conventional back fixed lens group behind the mobile lens group U2 on chip, therefore, the focal length of back mobile lens group U2 just is necessary for, be that total system is negative-eurymeric structure, like this can be so that structure is further compact.
Zoom lens front moving lens group U1 comprises 4 lens, i.e. 2 positive lenss and 2 negative lenses, back mobile lens group U2 comprises 6 lens, i.e. 3 positive lenss and 3 negative lenses, like this, can guarantee that by the collocation of the correspondence of positive negative lens the aberration that moves forward and backward lens combination can correct fully alone, also just may constitute a zoom system, pancreatic system that only constitutes and reach satisfied image quality, and the picture element that such structure more helps in the zoom process be stable by two groups of mobile lens.In order not allow the aperture of lens of rear end too big, system Guang Lan is arranged on the rear portion of camera lens, otherwise, to satisfy under the little prerequisite of rear portion aperture of lens, it is very difficult that the rectification of aberration becomes.Can also make that the track of light beam is more level and smooth by suitably strengthening the bore of front lens.
The front moving lens group U1 that light is had disperse function is with near the position of remote object image-forming 2 times of focal lengths of object space of back mobile lens group U2, make back mobile lens group U2 be in magnification, help for realizing that certain zoom ratio is unlikely to the displacement of lens combination long like this near-1 the position.
In order to make Zooming-projection camera lens clear in different projector distance imagings, fixedly the focal power of U1 is reasonable before being distributed in, and should satisfy inequality: 0.86＜| f1/f2|＜1.17.
Wherein, f1 is the combined focal length of preceding fixedly group U1, and f2 is the focal length of back mobile lens group U2, exceeds this scope, the just difficult control of the aberration of other position.
For convenience, establish an empty face in front at first of camera lens, as the structural parameters of zoom configuration, because the relative projector distance of this thickness is very little, so it does not influence practical effect the thickness of this void face yet.The structural parameters of Zooming-projection camera lens of the present invention see Table 1, and the zoom configuration parameter sees Table 2, and the ratio chromatism, of system sees Table 3.
Table 1
Surf Type Radius Thickness Glass
OBJ STANDARD Infinity 2000
1 STANDARD Infinity S1
2 STANDARD 100.6 5.2 1.5164 64.12
3 STANDARD -186.21 2.37
4 STANDARD 51.208 6 1.6204 60.27
5 STANDARD 15.772 5.786116
6 STANDARD -32.40031 1.6 1.8061 33.3
7 STANDARD 32.4 7.52
8 STANDARD 63.18 4.2 1.7552 27.5
9 STANDARD -91.876 S9
10 STANDARD 88.23 4 1.7859 43.9
11 STANDARD -47.37411 5.75
12 STANDARD -22.54 1.4 1.8052 25.5
13 STANDARD -43.1 10.57
STO STANDARD 25.82 4.5 1.5164， 64.12
15 STANDARD -43.64337 4.25
16 STANDARD 30.2144 1.8 1.6034 38
17 STANDARD 16.14 0.93
18 STANDARD 28.585 5.2 1.5400 59.66
19 STANDARD -13.11143 1.4 1.8061 33.3
20 STANDARD -43.05 0.5
21 STANDARD Infinity 3 1.4875 70.4
22 STANDARD Infinity S22
23 STANDARD Infinity 27
24 STANDARD Infinity 0.15
IMA STANDARD Infinity
Table 2
| Spaced surface | Short burnt 21.4mm | In burnt 23.5mm | Long burnt 25.68mm |
| APER | 2.37 | 2.43 | 2.49 |
| S1 | 0 | 1.058 | 1.98 |
| S9 | 6.9215 | 4.95 | 3 |
| S22 | 0.2 | 1.225 | 2.351 |
Table 3
In the table 3, Field is the visual field coordinate of complete relatively visual field, and R is the ratio chromatism, of long wave and reference light, unit: micron, B is the ratio chromatism, of shortwave and reference light, unit: micron.
Fig. 4, Fig. 5 are respectively that zoom lens of the present invention is at short burnt, long burnt ray trajectory figure.
Fig. 6, Fig. 7, Fig. 8 are respectively that zoom lens of the present invention is at short Jiao, middle Jiao, long burnt curvature of field line and distortion curve figure.
Fig. 9, Figure 10, Figure 11 are respectively that zoom lens of the present invention is at short Jiao, middle Jiao, long burnt transfer curve figure at 46lp/mm.
Figure 12, Figure 13, Figure 14 are respectively that zoom lens of the present invention is at short Jiao, middle Jiao, long burnt vertical axial aberration curve map.
Claims (4)
1, a kind of two sets mobile variable-focus projection lens, the optical system of this camera lens is made up of front moving lens group [U1] with negative power and back mobile lens group [U2] with positive light coke, front moving lens group [U1], back mobile lens group [U2] along optical axis from screen side to the picture planar side series arrangement, and from wide-angle side to the end of dolly-out,ing dolly-back along the optical axis realization zoom that relatively moves, it is characterized in that: described front moving lens group [U1] from screen side to the picture in-plane by biconvex positive lens [L1], bent moon negative lens [L2], double-concave negative lens L3], biconvex positive lens [L4] is formed, and its combined focal length is for negative; Back mobile lens group [U2] is made up of positive lens [L5], negative lens [L6], positive lens [L7], negative lens [L8], balsaming lens [L9, L10] to the picture in-plane from screen side, its combined focal length is being for just, and is being provided with the Guang Lan of system at positive lens [L7] position near the picture planar side.
2, two sets mobile variable-focus projection lens according to claim 1, it is characterized in that: described balsaming lens [L9, L10] is formed by the lens [L9] of crown glass material and lens [L10] gummed of flint glass material, wherein, the crown glass lens are positioned at image planes one side.
3, two sets mobile variable-focus projection lens according to claim 1, it is characterized in that: mobile lens group [U2] is mobile together subsequently in the zoom process on described system light hurdle, system's light hurdle bore remains unchanged, and is crossing on the light hurdle from the chief ray and the optical axis of picture plane outgoing.
4, according to claim 1 or 3 described two sets mobile variable-focus projection lens, it is characterized in that: directly lean on mutually with lens [L9] in the balsaming lens [L9, L10] near the negative lens [L8] of picture planar side in the described back mobile lens group [U2].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101069387A CN100437190C (en) | 2006-08-28 | 2006-08-28 | Two sets mobile variable-focus projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101069387A CN100437190C (en) | 2006-08-28 | 2006-08-28 | Two sets mobile variable-focus projection lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1920609A CN1920609A (en) | 2007-02-28 |
| CN100437190C true CN100437190C (en) | 2008-11-26 |
Family
ID=37778369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101069387A Active CN100437190C (en) | 2006-08-28 | 2006-08-28 | Two sets mobile variable-focus projection lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100437190C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110673314B (en) * | 2019-09-29 | 2021-12-03 | 凯迈（洛阳）测控有限公司 | Negative compensation type large-target-surface medium-wave refrigeration infrared continuous zooming optical system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179473A (en) * | 1989-10-03 | 1993-01-12 | Canon Kabushiki Kaisha | Zoom lens |
| US5319495A (en) * | 1991-10-25 | 1994-06-07 | Fuji Photo Optical Company, Ltd. | Zoom lens |
| JP2002148515A (en) * | 2000-11-10 | 2002-05-22 | Nitto Kogaku Kk | Zoom lens for projection and projector device |
| US7038857B1 (en) * | 2005-05-12 | 2006-05-02 | Asia Optical Co., Inc. | Projection zoom lens |
-
2006
- 2006-08-28 CN CNB2006101069387A patent/CN100437190C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179473A (en) * | 1989-10-03 | 1993-01-12 | Canon Kabushiki Kaisha | Zoom lens |
| US5319495A (en) * | 1991-10-25 | 1994-06-07 | Fuji Photo Optical Company, Ltd. | Zoom lens |
| JP2002148515A (en) * | 2000-11-10 | 2002-05-22 | Nitto Kogaku Kk | Zoom lens for projection and projector device |
| US7038857B1 (en) * | 2005-05-12 | 2006-05-02 | Asia Optical Co., Inc. | Projection zoom lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1920609A (en) | 2007-02-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10962750B2 (en) | Projection optical system, projection apparatus, and projection system | |
| CN101329443B (en) | Projection zoom lens and projection display device | |
| CN101556372B (en) | Projection zoom lens system and projection type display apparatus | |
| CN103777314A (en) | Wide-angle projection lens | |
| CN201740911U (en) | Wide-angle zoom lens for projection and projection display device | |
| CN101915980B (en) | Image space telecentric projection camera lens | |
| CN100492090C (en) | DLP zooming projection lens | |
| CN100543511C (en) | The DLP long back work distance zooming projection lens | |
| CN103246047A (en) | Large-field angle low-projection ratio digital projector lens | |
| CN210323733U (en) | Projection lens and projection device | |
| CN108132526A (en) | A kind of fringe projection camera lens for three-dimensional measurement | |
| CN109407288B (en) | Refraction and reflection type ultra-short-focus projection lens system | |
| CN111123481A (en) | Ultra-short focus projection lens based on refraction and reflection type optical lens | |
| CN107167992A (en) | A kind of telecentricity digital projector camera lens of the small projection ratio of wide-angle | |
| CN207457592U (en) | A kind of ultrashort out-of-focus projection's camera lens | |
| CN108227150B (en) | High-resolution low-distortion miniature projection lens | |
| CN111580247B (en) | Integrally-focusing high-definition micro-projection lens | |
| CN105182511A (en) | Eight-group ten-sheet refraction and reflection type ultra-low projection ratio projection lens foundation structure | |
| CN107817593A (en) | A kind of ultrashort out-of-focus projection's camera lens | |
| CN100437190C (en) | Two sets mobile variable-focus projection lens | |
| CN101915983B (en) | Continuous zooming projection lens | |
| CN201122199Y (en) | DLP zooming projection lens | |
| CN201141936Y (en) | DLP long rear work distance zooming projection lens | |
| CN107121767B (en) | High-resolution projection lens for DLP (digital light processing) engineering projector | |
| CN100507632C (en) | Zooming projection lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190802 Address after: 473000 No. 366 Xinchen West Road, Nanyang High-tech Zone, Henan Province Patentee after: Nanyang Lida Photoelectric Co., Ltd. Address before: 473003 No. 254, Zhongzhou Road, Nanyang, Henan Patentee before: Lida Optical and Electronic Co., Ltd. |
|
| TR01 | Transfer of patent right |