CN220137478U - Ultra-clean outdoor projection lens - Google Patents
Ultra-clean outdoor projection lens Download PDFInfo
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- CN220137478U CN220137478U CN202320523223.0U CN202320523223U CN220137478U CN 220137478 U CN220137478 U CN 220137478U CN 202320523223 U CN202320523223 U CN 202320523223U CN 220137478 U CN220137478 U CN 220137478U
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- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 230000004075 alteration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000005308 flint glass Substances 0.000 description 4
- 230000005499 meniscus Effects 0.000 description 4
- 239000005331 crown glasses (windows) Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- 101000801088 Homo sapiens Transmembrane protein 201 Proteins 0.000 description 1
- 102100033708 Transmembrane protein 201 Human genes 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses an ultra-clear outdoor projection lens, which is formed by combining 7 spherical lenses, wherein the combined focal power is positive, and the ultra-clear outdoor projection lens comprises a first focal length lens, a second focal length lens, a third focal length lens, a fourth focal length lens, a fifth focal length lens, a sixth focal length lens and a seventh focal length lens which are sequentially arranged along the direction from an object side to an image side of an optical axis; an aperture stop STO is arranged between the third focal length lens and the fourth focal length lens, and the image source height ImgH of the projection lens and the total effective focal length f of the projection lens meet 0.45< ImgH/f <0.6; the aperture value FNO of the optical lens accords with 1.7< FNO <2. The effective diameter of the pattern can reach 43mm, and the projection lens has super-resolution.
Description
Technical Field
The utility model relates to the technical field of projection lenses, in particular to an ultra-clear outdoor projection lens.
Background
With the development of high technology, projection applications are becoming more and more widespread, movie theatres, stages, squares, offices, families, etc., are now also being applied not only indoors but also outdoors, and the aberration requirements for projection are becoming higher and higher.
The existing outdoor projection lamp has fewer lens patterns (within 30 mm), has insufficient detail degree for some complex patterns, has most of definition in the market, and can not reach some customers with high requirements although the part of definition reaches standard definition.
Disclosure of Invention
In order to achieve the above purpose, the present utility model adopts the following technical scheme: an ultra-clear outdoor projection lens is formed by combining 7 spherical lenses, has positive combined focal power, and comprises a first focal length lens, a second focal length lens, a third focal length lens, a fourth focal length lens, a fifth focal length lens, a sixth focal length lens and a seventh focal length lens which are sequentially arranged along an optical axis from an object side to an image side; an aperture stop STO is arranged between the third focal length lens and the fourth focal length lens, and the image source height ImgH of the projection lens and the total effective focal length f of the projection lens meet 0.45< ImgH/f <0.6; the aperture value FNO of the optical lens accords with 1.7< FNO <2.
Preferably, the focal length of the lens is 81mm, and the projection ratio of the optical lens is 1:0.5.
Preferably, the first focal length lens and the second focal length lens are convex-concave along the direction from the object side to the image side of the optical axis, and the focal power of the first focal length lens and the second focal length lens is positive; the third focal length lens is convex-concave, and the focal power is negative; the fourth focal length lens is concave and flat, and the focal power is negative; the fifth focal length lens is plano-convex, and the focal power is positive; the sixth focal length lens is convex, and the focal power is positive; the seventh focal length lens is convex-concave, and the focal power is positive.
Preferably, the focal length f1 of the first focal length lens and the total effective focal length f of the projection lens satisfy 0.7< f1/f <0.92.
Preferably, the focal length f2 of the second focal length lens and the total effective focal length f of the projection lens satisfy 0.73< f2/f <0.92.
Preferably, the focal length f3 of the third focal length lens and the total effective focal length f of the projection lens satisfy-0.52 < f3/f < -0.36.
Preferably, the focal length f4 of the fourth focal length lens and the total effective focal length f of the projection lens satisfy-0.45 < f4/f < -0.31.
Preferably, the fourth focal length lens and the fifth focal length lens together form a double-cemented lens, and the focal length f45 of the cemented lens and the total effective focal length f of the projection lens satisfy-1.65 < f45/f < -0.98.
Preferably, the focal length f6 of the sixth focal length lens and the total effective focal length f of the projection lens satisfy-0.86 < f6/f <1.03.
Preferably, the focal length f7 of the seventh focal length lens and the total effective focal length f of the projection lens satisfy 1.61< f7/f <2.01.
The utility model has the following beneficial effects:
1. the whole structure of the utility model takes the diaphragm surface as the axis, and is symmetrical left and right, which is beneficial to eliminating coma and aberration.
2. The structure is an image space telecentric lens, and the brightness ratio of the center to the edge can reach more than 0.9.
3. Compared with the existing outdoor projection lamp lens, the pattern effective diameter of the utility model can reach 43mm, and the MTF 50lp/mm is more than 0.3, and the projection lens has super-resolution.
Drawings
Legend description: an L1 first focal length lens, an L2 second focal length lens, an L3 third lens, an L4 fourth focal length lens, an L5 fifth focal length lens, an L6 sixth focal length lens, an L7 seventh focal length lens and an IMA1 pattern piece.
FIG. 1 is a diagram of an optical system of the present lens;
FIG. 2 is a vertical aberration diagram of the optical system of FIG. 1;
FIG. 3 is a field curvature and distortion aberration diagram of the optical system of FIG. 1;
fig. 4 is a spherical aberration diagram of the optical system of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Referring to fig. 1-4 and table 1, one embodiment of the present utility model provides:
the ultra-clear outdoor projection lens is formed by combining 7 spherical lenses, wherein the combined focal power is positive, and the ultra-clear outdoor projection lens comprises a first focal length lens L1, a second focal length lens L2, a third focal length lens L3, a fourth focal length lens L4, a fifth focal length lens L5, a sixth focal length lens L6 and a seventh focal length lens L7, and an aperture stop STO is arranged between the third focal length lens L3 and the fourth focal length lens L4 so as to enable the whole structure to be symmetrical left and right; meanwhile, the image source height ImgH of the projection lens and the total effective focal length f of the projection lens meet 0.45< ImgH/f <0.6, the aperture value FNO of the optical lens meets 1.7< FNO <2, the focal length of the lens is 81mm, and the projection ratio of the optical lens is 1:0.5.
The first focal length lens L1 is a meniscus lens for dense crown glass, and comprises an object side S1 surface and an image side S2 surface, wherein S1 is a convex surface, S2 is a concave surface, and the focal length f1 of the first focal length lens L1 and the total effective focal length f of the projection lens meet 0.7< f1/f <0.92.
The second focal length lens L2 is a meniscus lens of heavy flint glass, and comprises an object side S3 surface and an image side S4 surface, wherein S3 is a convex surface, S4 is a concave surface, and the focal power is positive, and the focal length f2 of the second focal length lens L2 and the total effective focal length f of the projection lens meet 0.73< f2/f <0.92.
The third focal length lens L3 is a meniscus lens of heavy flint glass, and comprises an object side S5 surface and an image side S6 surface, wherein S5 is a convex surface, S6 is a concave surface, and the focal length f3 of the third focal length lens L3 and the total effective focal length f of the projection lens meet-0.52 < f3/f < -0.36.
The fourth focal length lens L4 and the fifth focal length lens L5 together constitute a cemented doublet:
the fourth focal length lens L4 is a plano-concave lens of flint glass, and comprises an object side S7 surface and a public surface S8 surface, wherein S7 is a concave surface, S8 is a plane, the focal power is negative, and the focal length f4 of the fourth focal length lens L4 and the total effective focal length f of the projection lens meet-0.45 < f4/f < -0.31.
The fifth focal length lens L5 is a plano-convex lens of dense crown glass, and comprises a common plane S8 surface and an image side S9 surface, wherein S8 is a plane, S9 is a convex surface, and the focal power is positive.
The fourth focal length lens L4 and the fifth focal length lens L5 form a double-cemented lens together, and the focal length f45 of the cemented lens and the total effective focal length f of the projection lens meet-1.65 < f45/f < -0.98.
The sixth focal length lens L6 is a biconvex lens of dense crown glass, and comprises an object side S10 surface and an image side S11 surface, wherein S10 is a convex surface, S11 is a convex surface, the focal power is positive, and the focal length f6 of the sixth focal length lens L6 and the total effective focal length f of the projection lens meet-0.86 < f4/f <1.03.
The seventh focal length lens L7 is a meniscus lens made of flint glass, and comprises an object side S12 surface and an image side S13 surface, wherein S12 is a convex surface, S13 is a concave surface, and the focal length f7 of the seventh focal length lens L7 and the total effective focal length f of the projection lens meet 1.61< f7/f <2.01.
The super-resolution is realized through the scheme.
TABLE 1
Finally, it should be noted that: the foregoing description of the preferred embodiments of the present utility model is not intended to be limiting, but rather, it will be apparent to those skilled in the art that the foregoing description of the preferred embodiments of the present utility model can be modified or equivalents can be substituted for some of the features thereof, and any modification, equivalent substitution, improvement or the like that is within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. An ultra-clear outdoor projection lens, characterized in that: the outdoor projection lens is formed by combining 7 spherical lenses, the combined focal power is positive, and the outdoor projection lens comprises a first focal length lens, a second focal length lens, a third focal length lens, a fourth focal length lens, a fifth focal length lens, a sixth focal length lens and a seventh focal length lens which are sequentially arranged along the direction from an object side to an image side of an optical axis; an aperture stop STO is arranged between the third focal length lens and the fourth focal length lens, and the image source height ImgH of the projection lens and the total effective focal length f of the projection lens meet 0.45< ImgH/f <0.6; the aperture value FNO of the optical lens accords with 1.7< FNO <2.
2. The ultra-clear outdoor projection lens of claim 1, wherein the lens focal length is 81mm and the optical lens has a throw ratio of 1:0.5.
3. The ultra-clear outdoor projection lens of claim 1, wherein the first and second focal length lenses are convex-concave along the direction from the object side to the image side, and the focal power is positive; the third focal length lens is convex-concave, and the focal power is negative; the fourth focal length lens is concave and flat, and the focal power is negative; the fifth focal length lens is plano-convex, and the focal power is positive; the sixth focal length lens is convex, and the focal power is positive; the seventh focal length lens is convex-concave, and the focal power is positive.
4. A super-clear outdoor projection lens as claimed in any one of claims 1 to 3, wherein the focal length f1 of the first focal length lens and the total effective focal length f of the projection lens satisfy 0.7< f1/f <0.92.
5. A super-clear outdoor projection lens as claimed in any one of claims 1 to 3, wherein the focal length f2 of the second focal length lens and the total effective focal length f of the projection lens satisfy 0.73< f2/f <0.92.
6. A super-clear outdoor projection lens as claimed in any one of claims 1 to 3, wherein the focal length f3 of the third focal length lens and the total effective focal length f of the projection lens satisfy-0.52 < f3/f < -0.36.
7. A super-clear outdoor projection lens as claimed in any one of claims 1 to 3, wherein the focal length f4 of the fourth focal length lens and the total effective focal length f of the projection lens satisfy-0.45 < f4/f < -0.31.
8. A super-clear outdoor projection lens as claimed in any one of claims 1 to 3, wherein the fourth and fifth focal length lenses together form a double cemented focal length lens with a focal length f45 and a total effective focal length f of the projection lens satisfying-1.65 < f45/f < -0.98.
9. A super-clear outdoor projection lens as claimed in any one of claims 1 to 3, wherein the focal length f6 of the sixth focal length lens and the total effective focal length f of the projection lens satisfy-0.86 < f6/f <1.03.
10. A super-clear outdoor projection lens as claimed in any one of claims 1 to 3, wherein the focal length f7 of the seventh focal length lens and the total effective focal length f of the projection lens satisfy 1.61< f7/f <2.01.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320523223.0U CN220137478U (en) | 2023-03-17 | 2023-03-17 | Ultra-clean outdoor projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320523223.0U CN220137478U (en) | 2023-03-17 | 2023-03-17 | Ultra-clean outdoor projection lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220137478U true CN220137478U (en) | 2023-12-05 |
Family
ID=88958111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320523223.0U Active CN220137478U (en) | 2023-03-17 | 2023-03-17 | Ultra-clean outdoor projection lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220137478U (en) |
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2023
- 2023-03-17 CN CN202320523223.0U patent/CN220137478U/en active Active
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