CN202057894U - Elliptical diaphragm projecting lens - Google Patents
Elliptical diaphragm projecting lens Download PDFInfo
- Publication number
- CN202057894U CN202057894U CN2011201526590U CN201120152659U CN202057894U CN 202057894 U CN202057894 U CN 202057894U CN 2011201526590 U CN2011201526590 U CN 2011201526590U CN 201120152659 U CN201120152659 U CN 201120152659U CN 202057894 U CN202057894 U CN 202057894U
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- China
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- projection lens
- elliptical
- dmd device
- light hurdle
- diaphragm
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Abstract
The utility model relates to an elliptical diaphragm projecting lens, which comprises an elliptical diaphragm and a digital mirror device (DMD) device. The DMD device is a diamond-shaped pixel. The minor axis of the elliptical diaphragm is in a direction perpendicular to the pixel hinge of the DMD device, and the length size of the minor axis of the diaphragm is equal to the numerical value of the aperture of the diaphragm of the projecting lens when the numerical arperture of the projecting lens is F/2.4. The major axis of the elliptical diaphragm is in a direction parallel to the pixel hinge of the DMD device, and the length size of the major axis of the diaphragm is equal to the numerical value of the aperture of the diaphragm of the projecting lens when the numerical aperture of the projecting lens ranges from F/2.4 to F/1.5. The major axis of the elliptical diaphragm of the projecting lens is in a direction parallel to the pixel hinge of the DMD device. Compared with the prior art, the energy utilization rate of a digital projector system is increased while contrast of the digital projector system is not lowered.
Description
Technical field
The utility model relates to the digital projection system of photoelectric display technical field, is a kind of elliptical light hurdle projection lens that can improve the projector system capacity usage ratio that is adapted to use on the digital projector.
Background technology
The existing digital projection camera lens light hurdle that uses, its shape mostly is circle or D font greatly.When circular light hurdle projection lens designed, in order to obtain bigger energy utilization and best picture contrast, the numerical aperture of projection lens and the numerical aperture of illuminator needed a reasonably coupling.If the numerical aperture of projection lens is enough big, the logical light light hurdle of projection lens also will become greatly, and the capacity usage ratio of system can improve like this, but DMD device scattered light also can increase greatly, and the contrast of system will descend, and does not reach good result of use.If the numerical aperture of projection lens is less than the numerical aperture of illuminator, DMD device scattered light will reduce, and the contrast of system can improve, and still, so does the capacity usage ratio that can reduce system.When D font light hurdle projection lens designed, the numerical aperture of projection lens was consistent with illuminator, and DMD device scattered light can reduce, and the contrast of system increases, but capacity usage ratio does not improve.
The utility model content
The purpose of this utility model provides a kind of elliptical light hurdle projection lens, improves digital projector system capacity utilization factor and does not reduce the projector system contrast.
For achieving the above object, the technical scheme that the utility model adopted: this elliptical light hurdle projection lens has elliptical light hurdle and DMD device, wherein: described DMD device is a diamond pixels, be the minor axis on elliptical light hurdle perpendicular to DMD device pixel hinge direction, the Guang Lan aperture numerical value of projection lens when elliptical light hurdle minor axis length size equals the projection lens numerical aperture and is F/2.4, being parallel to DMD device pixel hinge direction is the major axis on elliptical light hurdle, the Guang Lan aperture numerical value of elliptical light hurdle long axis length size equals the projection lens numerical aperture when being F/2.4～F/1.5 projection lens, the major axis on the elliptical light hurdle of described projection lens is parallel with DMD device pixel hinge direction.
Adopt the beneficial effect of technique scheme: this elliptical light hurdle projection lens is when the DMD device is worked, each pixel of DMD device of diamond pixels along hinge direction do not stop in " 12 ° ", " 0 ° ", " 12 ° " upsets (corresponding to 12 ° of DMD devices), the incident light reflection of inciding perpendicular to DMD device pixel hinge direction is entered in the projection lens, this part light is equivalent to the light that the projection lens numerical aperture is F/2.4, the pupil of this part light and illumination path is complementary, thereby this part light is fully used.Extra, after the light that is parallel to DMD device pixel hinge direction is through DMD device pixel reflects, enter projection lens, this part light is equivalent to the light that the projection lens numerical aperture is F/1.5, this light that additionally enters camera lens has increased the capacity usage ratio of system, be that the light hurdle of F/2.4 blocks simultaneously be subjected to the projection lens numerical aperture perpendicular to DMD device pixel hinge direction, therefore, this part veiling glare is blocked, thereby does not reduce the contrast of system.So the elliptical light hurdle projection lens that adopts such scheme to be designed to both can improve digital projector system capacity utilization factor, did not reduce the digital projector system contrast again.
Description of drawings
For satisfying above-mentioned effect requirements, the structural parameters of elliptical light hurdle projection lens are further described below by embodiment.
Fig. 1 is elliptical light of the present utility model hurdle shape figure.
Fig. 2 is the diamond pixels shape figure of DMD device.
Fig. 3 is elliptical light hurdle projection lens and DMD device rigging position synoptic diagram.
Fig. 4 is the light area (border circular areas) that the projection lens of F/2.4 passes through when conventional circular light hurdle for numerical aperture.
Fig. 5 for the major axis numerical aperture be F/1.8, minor axis numerical aperture be the ellipse-shaped light hurdle of projection lens of F/2.4 by light area (elliptical region), border circular areas is that numerical aperture is the light area that the projection lens of F/2.4 passes through when conventional circular light hurdle.
Embodiment
Elliptical light hurdle projection lens as shown in Figure 1, 2, 3 has elliptical light hurdle 1 and DMD device 4, DMD device 4 is the DMD device of diamond pixels, there is the elliptical light hurdle minor axis 3 perpendicular to DMD device pixel 6 hinge direction on elliptical light hurdle 1, and elliptical light hurdle major axis 2 compositions that are parallel to DMD device pixel hinge direction 5.The Guang Lan aperture numerical value of the Guang Lan aperture numerical value of projection lens when elliptical light hurdle minor axis length size equals projection lens 7 numerical apertures and is F/2.4, elliptical light hurdle long axis length size equal projection lens 7 numerical apertures when being F/2.4～F/1.5 projection lens.And the size of major axis numerical aperture can be considered according to the designing requirement of projection lens: such as, be subjected to projection lens outside dimension, performance, structure and cost requirement, numerical aperture can be from F/2.4 to F/1.5 between choose reasonable.
For instance, at design DMD device is 0.45 "; resolution is 1280 X800 pixels; projection is than being 1.35:1, and when vertical off setting was 100% elliptical light hurdle projection lens, the numerical aperture on projection lens ellipse short shaft direction was F/2.4; then its minor axis length is 8.6mm; limited by contour structure size, aberration and cost, and the major axis numerical aperture of projection lens is got F/1.8, and then its long axis length is 11.7mm.Because this specification DMD device pixel hinge direction 5 is above-below directions, therefore, major axis is provided with along the vertical direction during the assembling of elliptical light hurdle.Numerical aperture is the light area that the projection lens of F/2.4 passes through when conventional circular light hurdle as shown in Figure 4, be border circular areas, the major axis numerical aperture is F/1.8 as shown in Figure 5, the minor axis numerical aperture is that the ellipse-shaped light hurdle of the projection lens of F/2.4 passes through the light area, be elliptical region, border circular areas is that numerical aperture is the light area that the projection lens of F/2.4 passes through when conventional circular light hurdle, the light that additionally enters camera lens has increased the capacity usage ratio of system, be that the light hurdle of F/2.4 blocks simultaneously be subjected to the projection lens numerical aperture perpendicular to DMD device pixel hinge direction, therefore, this part veiling glare is blocked, thereby does not reduce the contrast of system.
Claims (1)
1. elliptical light hurdle projection lens, have elliptical light hurdle and DMD device, it is characterized in that: described DMD device is a diamond pixels, be the minor axis on elliptical light hurdle perpendicular to DMD device pixel hinge direction, the Guang Lan aperture numerical value of projection lens when elliptical light hurdle minor axis length size equals the projection lens numerical aperture and is F/2.4, being parallel to DMD device pixel hinge direction is the major axis on elliptical light hurdle, the Guang Lan aperture numerical value of elliptical light hurdle long axis length size equals the projection lens numerical aperture when being F/2.4～F/1.5 projection lens, the major axis on the elliptical light hurdle of described projection lens is parallel with DMD device pixel hinge direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201526590U CN202057894U (en) | 2011-05-13 | 2011-05-13 | Elliptical diaphragm projecting lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201526590U CN202057894U (en) | 2011-05-13 | 2011-05-13 | Elliptical diaphragm projecting lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202057894U true CN202057894U (en) | 2011-11-30 |
Family
ID=45017864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201526590U Expired - Lifetime CN202057894U (en) | 2011-05-13 | 2011-05-13 | Elliptical diaphragm projecting lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202057894U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183835A (en) * | 2011-05-13 | 2011-09-14 | 利达光电股份有限公司 | Oval diaphragm protection lens |
| CN107850819A (en) * | 2015-07-23 | 2018-03-27 | 优势电影有限公司 | For camera lens or for photo or the ellipticity aperture of film camera |
| TWI659239B (en) * | 2018-11-14 | 2019-05-11 | 大立光電股份有限公司 | Imaging optical lens assembly, imaging apparatus and electronic device |
-
2011
- 2011-05-13 CN CN2011201526590U patent/CN202057894U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183835A (en) * | 2011-05-13 | 2011-09-14 | 利达光电股份有限公司 | Oval diaphragm protection lens |
| CN107850819A (en) * | 2015-07-23 | 2018-03-27 | 优势电影有限公司 | For camera lens or for photo or the ellipticity aperture of film camera |
| US10942420B2 (en) | 2015-07-23 | 2021-03-09 | Vantage Film Gmbh | Ellipse-like aperture for a camera lens assembly or for a photo or film camera |
| TWI659239B (en) * | 2018-11-14 | 2019-05-11 | 大立光電股份有限公司 | Imaging optical lens assembly, imaging apparatus and electronic device |
| US11442256B2 (en) | 2018-11-14 | 2022-09-13 | Largan Precision Co., Ltd. | Imaging optical lens assembly, imaging apparatus and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190725 Address after: 473000 No. 366 Xinchen West Road, Nanyang High-tech Zone, Henan Province Patentee after: Nanyang Lida Photoelectric Co., Ltd. Address before: 473000 Nanyang Industrial Road, Henan, No. 508 Patentee before: Lida Optical and Electronic Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111130 |