CN204439920U - A kind of wide-angle zoom object lens of constant aperture - Google Patents
A kind of wide-angle zoom object lens of constant aperture Download PDFInfo
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- 239000000571 coke Substances 0.000 claims abstract description 23
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- 230000003287 optical effect Effects 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 13
- 230000005499 meniscus Effects 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 abstract description 5
- 239000012467 final product Substances 0.000 abstract description 4
- 238000003384 imaging method Methods 0.000 abstract description 4
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Abstract
The utility model discloses a kind of wide-angle zoom object lens of constant aperture, the first lens combination is from left to right disposed with along object incident light side at object lens body, second lens combination, diaphragm, 3rd lens combination, 4th lens combination and sensitive film, first lens combination is fixedly connected with object lens body with the 3rd lens combination, second lens combination has negative power, can be moved to image planes side by object side, realize camera lens by wide-angle side to telescope end zoom, 4th lens combination has positive light coke, as image speckles offset lens, can move vertically relative to object lens body, image speckles is compensated, the utility model maximum ring in zoom process is constant, the large aperture that visual field is greater than 74 °, its structural design is compact, be easy to realize object lens miniaturization, in addition, each lens combination of the utility model is when high/low temperature changes, and its focal length is constant, and make the utility model in the temperature range of-45 DEG C-85 DEG C, can get final product blur-free imaging without the need to again focusing, resolution reaches more than eight mega pixels, has excellent resolving power.
Description
[technical field]
The utility model relates to field of optical lens, particularly relates to a kind of wide-angle zoom object lens of constant aperture.
[background technology]
Objective with variable focal length just has actual designing and employing in eighties of last century, but due to image quality poor than common fix-focus lens, so use popularity rate is not high.Along with lens design techniques development, the occasion of zoom lens application increases gradually.Nowadays, objective with variable focal length has been widely used in the field such as the product for civilian use, safety monitoring.Even so, but conventional multifocal still exists many defects relative to fix-focus lens apart from object lens.If conventional multifocal distance object lens are in zoom process, maximum diameter of hole can change along with the change of zoom ratio; Objective with variable focal length cannot obtain large visual field; Objective with variable focal length F number is larger; Certain gap is deposited greatly with fix-focus lens.
For the above-mentioned defect of objective with variable focal length, namely the utility model is researched and proposed for the deficiencies in the prior art.
[utility model content]
The technical problems to be solved in the utility model is to provide a kind of wide-angle zoom object lens of constant aperture, the first lens combination is from left to right disposed with along object incident light side at object lens body, second lens combination, diaphragm, 3rd lens combination, 4th lens combination and sensitive film, first lens combination is fixedly connected with object lens body with the 3rd lens combination, second lens combination has negative power, can be moved to image planes side by object side, realize camera lens by wide-angle side to telescope end zoom, 4th lens combination has positive light coke, as image speckles offset lens, can move vertically relative to object lens body, image speckles is compensated, adopt the object lens of said structure, in zoom process, maximum ring is constant, the large aperture that visual field is greater than 74 °, its structural design is compact, be easy to realize object lens miniaturization, in addition, each lens combination of the utility model is when high/low temperature changes, and its focal length is constant, and make the utility model in the temperature range of-45 DEG C-85 DEG C, can get final product blur-free imaging without the need to again focusing, resolution reaches more than eight mega pixels, has excellent resolving power.
For solving the problems of the technologies described above, the wide-angle zoom object lens of a kind of constant aperture of the utility model, comprise object lens body, and described object lens body is from left to right disposed with along object incident light side:
First lens combination, has positive light coke, and relative object lens body is fixedly connected with;
Second lens combination, has negative power, can be moved relative to object lens body by object side to image planes side, realizes camera lens by wide-angle side to telescope end zoom;
3rd lens combination, has positive light coke, and relative object lens body is fixedly connected with;
4th lens combination, has positive light coke, as image speckles offset lens, can move vertically relative to object lens body, realize the compensation of image speckles;
Diaphragm, is located between described second lens combination and the 3rd lens combination, is fixedly connected with object lens body;
Sensitive film, for photosensitive process image, is fixedly connected with object lens body.
The focal length of described first lens combination is f1, and the focal length of described second lens combination is f2, and the focal length of described 3rd lens combination is f3, and the focal length of described 4th lens combination is f4, meets:
-2.8≥f1/f2≥-4.8，
2.1≥f1/f3≥1.2，
2.7≥f1/f4≥1.3。
Described first lens combination comprises first lens with negative power and second lens all with positive light coke and the 3rd lens, described first lens and the second lens are balsaming lens and cemented surface bends towards diaphragm, described first lens, the second lens and the 3rd lens from left to right set gradually along object incident light side, or described 3rd lens, the first lens and the second lens from left to right set gradually along object incident light side.
Described first lens, the second lens and the 3rd lens are made up of glass material, described first lens d optical index and Abbe number are respectively n1 and v1, described second lens light refractive index and Abbe number are respectively n2 and v2, and described 3rd lens d optical index and Abbe number are respectively n3 and v3, meet:
n1≥1.75,v1<30，
1.63≥n2≥1.45，v2＞60，
1.75≥n3≥1.60，v3＞50。
Described second lens combination comprises the 4th lens with negative power from left to right set gradually along object incident light side, has the 5th lens of negative power, has the 6th lens of positive light coke, and described 5th lens and the 6th lens are balsaming lens.
Described 4th lens, the 5th lens and the 6th lens are made up of glass material, described 4th lens d optical index and Abbe number are respectively n4 and v4, described 5th lens d optical index and Abbe number are respectively n5 and v5, and described 6th lens d optical index and Abbe number are respectively n6 and v6, meet:
n4≥1.80，v4＞30，
3.5≥n5+0.044×v5≥4.8，
n6≥1.75，v6<30。
Described 3rd lens combination comprises the 7th lens, 8th lens, 9th lens, tenth lens and the 11 lens, described 7th lens have positive light coke, described 8th lens are meniscus lens and diaphragm curving dorsad, described 9th lens and the tenth lens are balsaming lens, described 11 lens are meniscus lens and diaphragm curving in opposite directions, described 7th lens, 8th lens, 9th lens, tenth lens and the 11 lens from left to right set gradually along object incident light side, or described 7th lens, 9th lens, tenth lens, 8th lens and the 11 lens from left to right set gradually along object incident light side.
Described 7th lens, the 8th lens, the 9th lens, the tenth lens and the 11 lens are made up of glass material, described 7th lens d optical index and Abbe number are respectively n7 and v7, described 8th lens d optical index and Abbe number are respectively n8 and v8, described 9th lens d optical index and Abbe number are respectively n9 and v9, described tenth lens d optical index and Abbe number are respectively n10 and v10, described 11 lens d optical index and Abbe number are respectively n11 and v11, meet:
n7≥1.80，v7＞30，
n8≥1.80，v8<30，
1.103≥n9/n10≥0.805，
0.3≥v9/v10≥0.65，
n11≥1.55，v11＞55。
Described 4th lens combination comprises the 12 lens, the 13 lens and the 14 lens, described 12 lens and the 13 lens have positive light coke, described 13 lens and the 14 lens are balsaming lens and cemented surface bends towards diaphragm side in opposite directions, described 12 lens, the 13 lens and the 14 lens from left to right set gradually along object incident light side, or described 13 lens and the 14 lens and the 12 lens from left to right set gradually along object incident light side.
Described 12 lens, 13 lens and the 14 lens are made up of glass material, described 12 lens d optical index and Abbe number are respectively n12 and v12, described 13 lens d optical index and Abbe number are respectively n13 and v13, described 14 lens d optical index and Abbe number are respectively n14 and v14, meet:
n12≥1.68,v12<45，
0.85≥n13/n14≥0.72，
4.95≥v13/v14≥1.85。
Compared with prior art, the wide-angle zoom object lens of a kind of constant aperture of the utility model, tool has the following advantages:
1, in zoom process, maximum ring is constant, the large aperture that visual field is greater than 74 °;
2, structural design is compact, is easy to realize object lens miniaturization;
3, in the temperature range of-45 DEG C-85 DEG C, can get final product blur-free imaging without the need to again focusing, resolution reaches more than eight mega pixels, has excellent resolving power.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail, wherein:
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the spherical aberration curve map of wide-angle side of the present utility model.
Fig. 3 is the curvature of field and the distortion figure of wide-angle side of the present utility model.
Fig. 4 is one of coma curve map of wide-angle side of the present utility model.
Fig. 5 is the coma curve map two of wide-angle side of the present utility model.
Fig. 6 is the coma curve map three of wide-angle side of the present utility model.
Fig. 7 is the coma curve map four of wide-angle side of the present utility model.
Fig. 8 is the spherical aberration curve map taking the photograph far-end of the present utility model.
Fig. 9 is the curvature of field and the distortion figure that take the photograph far-end of the present utility model.
Figure 10 is one of coma curve map taking the photograph far-end of the present utility model.
Figure 11 is the coma curve map two taking the photograph far-end of the present utility model.
Figure 12 is the coma curve map three taking the photograph far-end of the present utility model.
Figure 13 is the coma curve map four taking the photograph far-end of the present utility model.
[embodiment]
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.
As shown in Figure 1, the wide-angle zoom object lens of a kind of constant aperture of the utility model, comprise object lens body 7, in object lens body 7, be provided with four groups of lens, be namely from left to right disposed with the first lens combination 1, second lens combination 2, the 3rd lens combination 3 and the 4th lens combination 4 along object incident light side.
First lens combination 1, has positive light coke, and relative object lens body 7 is fixedly connected with.
Second lens combination 2, has negative power, can be moved relative to object lens body 7 by object side to image planes 5 side, by regulating the second lens combination 2, can realize camera lens by wide-angle side to telescope end zoom.
3rd lens combination 3, has positive light coke, and relative object lens body 7 is fixedly connected with.
4th lens combination 4, has positive light coke, as image planes 5 bit shift compensation lens, can moving vertically relative to object lens body 7, by regulating the 4th lens combination 4, can realize the compensation of image planes 5 displacement.
Between described second lens combination 2 and the 3rd lens combination 3, be provided with diaphragm 6, diaphragm 6 is fixedly connected with object lens body 7.
Be provided with sensitive film 8 at the right-hand member of object lens body 7, for photosensitive process image, be fixedly connected with object lens body 7.
The focal length of described first lens combination 1 is f1, and the focal length of described second lens combination 2 is f2, and the focal length 3 of described 3rd lens combination is f3, and the focal length of described 4th lens combination 4 is f4, meets:
-2.8≥f1/f2≥-4.8，
2.1≥f1/f3≥1.2，
2.7≥f1/f4≥1.3。
Due to the first lens combination 1 and the 3rd lens combination 3 with object lens body 7 for being fixedly connected with, make it to immobilize relative to image planes 5 position, move along its axis by regulating the second lens combination 2, the utility model can realize zoom, 4th lens combination 4 is the bit shift compensation lens as image planes 5, move vertically by regulating the 4th lens combination 4, can realize carrying out bit shift compensation to image planes 5, in the utility model, the 3rd lens combination 3 is for correcting the spherical aberration because the first lens combination 1 and the second lens combination 2 produce, astigmatism and the curvature of field, excellent to guarantee the utility model picture element in whole zooming procedure.
Described first lens combination 1 comprises first lens 11 with negative power and second lens 12 all with positive light coke and the 3rd lens 13, described first lens 11 and the second lens 12 are for balsaming lens and cemented surface bends towards diaphragm 6, and described first lens 11, second lens 12 and the 3rd lens 13 from left to right set gradually along object incident light side.
As the another kind of structure of the first lens combination 1, the balsaming lens be made up of the first lens 11 and the second lens 12 and the 3rd lens 13 can be carried out evolution, namely from left to right setting gradually along object incident light side is the 3rd lens 13, first lens 11 and the second lens 12.
Described first lens 11, second lens 12 and the 3rd lens 13 are made up of glass material, described first lens 11d optical index and Abbe number are respectively n1 and v1, described second lens 12 optical index and Abbe number are respectively n2 and v2, described 3rd lens 13d optical index and Abbe number are respectively n3 and v3, meet:
n1≥1.75,v1<30，
1.63≥n2≥1.45，v2＞60，
1.75≥n3≥1.60，v3＞50。
Described second lens combination 2 comprises the 4th lens 21 with negative power from left to right set gradually along object incident light side, there are the 5th lens 22 of negative power, have the 6th lens 23 of positive light coke, described 5th lens 22 and the 6th lens 23 are balsaming lens.
Described 4th lens 21, the 5th lens 22 and the 6th lens 23 are made up of glass material, described 4th lens 21d optical index and Abbe number are respectively n4 and v4, described 5th lens 22d optical index and Abbe number are respectively n5 and v5, described 6th lens 23d optical index and Abbe number are respectively n6 and v6, meet:
n4≥1.80，v4＞30，
3.5≥n5+0.044×v5≥4.8，
n6≥1.75，v6<30。
Described 3rd lens combination 3 comprises the 7th lens 31, the 8th lens 32, the 9th lens 33, the tenth lens the 34 and the 11 lens 35, described 7th lens 31 have positive light coke, described 8th lens 32 are meniscus lens and diaphragm 6 curving dorsad, described 9th lens 33 and the tenth lens 34 are balsaming lens, described 11 lens 35 are meniscus lens and diaphragm 6 curving in opposite directions, and described 7th lens 31, the 8th lens 32, the 9th lens 33, the tenth lens the 34 and the 11 lens 35 from left to right set gradually along object incident light side.
As the another kind of structure of the 3rd lens combination 3,8th lens 32 can be carried out evolution with the balsaming lens be made up of the 9th lens 33 and the tenth lens 34, namely from left to right setting gradually along object incident light side is the 7th lens 31, the 9th lens 33, the tenth lens 34, the 8th lens the 32 and the 11 lens 35.
Described 7th lens 31, the 8th lens 32, the 9th lens 33, the tenth lens the 34 and the 11 lens 35 are made up of glass material, described 7th lens 31d optical index and Abbe number are respectively n7 and v7, described 8th lens 32d optical index and Abbe number are respectively n8 and v8, described 9th lens 33d optical index and Abbe number are respectively n9 and v9, described tenth lens 34d optical index and Abbe number are respectively n10 and v10, described 11 lens 35d optical index and Abbe number are respectively n11 and v11, meet:
n7≥1.80，v7＞30，
n8≥1.80，v8<30，
1.103≥n9/n10≥0.805，
0.3≥v9/v10≥0.65，
n11≥1.55，v11＞55。
Described 4th lens combination 4 comprises the 12 lens the 41, the 13 lens the 42 and the 14 lens 43, described 12 lens the 41 and the 13 lens 42 have positive light coke, described 13 lens 42 and the 14 lens 43 are for balsaming lens and cemented surface bends towards diaphragm 6 side in opposite directions, and described 12 lens the 41, the 13 lens the 42 and the 14 lens 43 from left to right set gradually along object incident light side.
As the another kind of structure of the 4th lens combination 4,12 lens 41 can be carried out evolution with the balsaming lens be made up of the 13 lens the 42 and the 14 lens 43, namely from left to right setting gradually along object incident light side is the 13 lens the 42, the 14 lens the 43 and the 12 lens 41.
Described 12 lens 41,13 lens the 42 and the 14 lens 43 are made up of glass material, described 12 lens 41d optical index and Abbe number are respectively n12 and v12, described 13 lens 42d optical index and Abbe number are respectively n13 and v13, described 14 lens 43d optical index and Abbe number are respectively n14 and v14, meet:
n12≥1.68,v12<45，
0.85≥n13/n14≥0.72，
4.95≥v13/v14≥1.85。
The utility model adopts four groups of lens combination, and often organizing lens combination all has some pieces of lens, and carry out respective specified to the parameter of each lens combination and each piece of lens, make the utility model, in zoom process, maximum ring is constant, the large aperture that visual field is greater than 74 °.
Optical parametric of the present utility model is as shown in Table 1:
Table one
In the utility model, each optics of lens parameter is as shown in Table 2:
Table two
In the utility model, between adjacent two lens combination, zoom spacing parameter is as shown in Table 3:
Table three
In addition, the each lens combination of the utility model all adopts glass material, material factor is considered when the utility model designs, make the utility model when high/low temperature changes, its focal length is constant, in the temperature range of-45 DEG C-85 DEG C, can get final product blur-free imaging without the need to again focusing, resolution reaches more than eight mega pixels, has excellent resolving power.
Claims (10)
1. wide-angle zoom object lens for constant aperture, is characterized in that comprising object lens body (7), and described object lens body (7) is from left to right disposed with along object incident light side:
First lens combination (1), has positive light coke, and relative object lens body (7) is fixedly connected with;
Second lens combination (2), has negative power, can be moved, realize camera lens by wide-angle side to telescope end zoom relative to object lens body (7) by object side to image planes (5) side;
3rd lens combination (3), has positive light coke, and relative object lens body (7) is fixedly connected with;
4th lens combination (4), has positive light coke, as image planes (5) bit shift compensation lens, can move vertically relative to object lens body (7), realize the compensation of image planes (5) displacement;
Diaphragm (6), is located between described second lens combination (2) and the 3rd lens combination (3), is fixedly connected with object lens body (7);
Sensitive film (8), for photosensitive process image, is fixedly connected with object lens body (7).
2. the wide-angle zoom object lens of a kind of constant aperture according to claim 1, the focal length that it is characterized in that described first lens combination (1) is f1, the focal length of described second lens combination (2) is f2, the focal length (3) of described 3rd lens combination is f3, the focal length of described 4th lens combination (4) is f4, meets:
-2.8≥f1/f2≥-4.8，
2.1≥f1/f3≥1.2，
2.7≥f1/f4≥1.3。
3. the wide-angle zoom object lens of a kind of constant aperture according to claim 1 and 2, it is characterized in that described first lens combination (1) comprises first lens (11) with negative power and second lens (12) all with positive light coke and the 3rd lens (13), described first lens (11) and the second lens (12) are for balsaming lens and cemented surface bends towards diaphragm (6), described first lens (11), second lens (12) and the 3rd lens (13) from left to right set gradually along object incident light side, or described 3rd lens (13), first lens (11) and the second lens (12) from left to right set gradually along object incident light side.
4. the wide-angle zoom object lens of a kind of constant aperture according to claim 3, it is characterized in that described first lens (11), the second lens (12) and the 3rd lens (13) are made up of glass material, described first lens (11) d optical index and Abbe number are respectively n1 and v1, described second lens (12) optical index and Abbe number are respectively n2 and v2, described 3rd lens (13) d optical index and Abbe number are respectively n3 and v3, meet:
n1≥1.75,v1<30，
1.63≥n2≥1.45，v2＞60，
1.75≥n3≥1.60，v3＞50。
5. the wide-angle zoom object lens of a kind of constant aperture according to claim 1 and 2, it is characterized in that described second lens combination (2) comprises the 4th lens (21) with negative power from left to right set gradually along object incident light side, there are the 5th lens (22) of negative power, have the 6th lens (23) of positive light coke, described 5th lens (22) and the 6th lens (23) are balsaming lens.
6. the wide-angle zoom object lens of a kind of constant aperture according to claim 5, it is characterized in that described 4th lens (21), the 5th lens (22) and the 6th lens (23) are made up of glass material, described 4th lens (21) d optical index and Abbe number are respectively n4 and v4, described 5th lens (22) d optical index and Abbe number are respectively n5 and v5, described 6th lens (23) d optical index and Abbe number are respectively n6 and v6, meet:
n4≥1.80，v4＞30，
3.5≥n5+0.044×v5≥4.8，
n6≥1.75，v6<30。
7. the wide-angle zoom object lens of a kind of constant aperture according to claim 1 and 2, it is characterized in that described 3rd lens combination (3) comprises the 7th lens (31), 8th lens (32), 9th lens (33), tenth lens (34) and the 11 lens (35), described 7th lens (31) have positive light coke, described 8th lens (32) for meniscus lens and dorsad diaphragm (6) curving, described 9th lens (33) and the tenth lens (34) are balsaming lens, described 11 lens (35) for meniscus lens and in opposite directions diaphragm (6) curving, described 7th lens (31), 8th lens (32), 9th lens (33), tenth lens (34) and the 11 lens (35) from left to right set gradually along object incident light side, or described 7th lens (31), 9th lens (33), tenth lens (34), 8th lens (32) and the 11 lens (35) from left to right set gradually along object incident light side.
8. the wide-angle zoom object lens of a kind of constant aperture according to claim 7, it is characterized in that described 7th lens (31), 8th lens (32), 9th lens (33), tenth lens (34) and the 11 lens (35) are made up of glass material, described 7th lens (31) d optical index and Abbe number are respectively n7 and v7, described 8th lens (32) d optical index and Abbe number are respectively n8 and v8, described 9th lens (33) d optical index and Abbe number are respectively n9 and v9, described tenth lens (34) d optical index and Abbe number are respectively n10 and v10, described 11 lens (35) d optical index and Abbe number are respectively n11 and v11, meet:
n7≥1.80，v7＞30，
n8≥1.80，v8<30，
1.103≥n9/n10≥0.805，
0.3≥v9/v10≥0.65，
n11≥1.55，v11＞55。
9. the wide-angle zoom object lens of a kind of constant aperture according to claim 1 and 2, it is characterized in that described 4th lens combination (4) comprises the 12 lens (41), 13 lens (42) and the 14 lens (43), described 12 lens (41) and the 13 lens (42) have positive light coke, described 13 lens (42) and the 14 lens (43) are for balsaming lens and cemented surface bends towards diaphragm (6) side in opposite directions, described 12 lens (41), 13 lens (42) and the 14 lens (43) from left to right set gradually along object incident light side, or described 13 lens (42) and the 14 lens (43) and the 12 lens (41) from left to right set gradually along object incident light side.
10. the wide-angle zoom object lens of a kind of constant aperture according to claim 9, it is characterized in that described 12 lens (41), 13 lens (42) and the 14 lens (43) are made up of glass material, described 12 lens (41) d optical index and Abbe number are respectively n12 and v12, described 13 lens (42) d optical index and Abbe number are respectively n13 and v13, described 14 lens (43) d optical index and Abbe number are respectively n14 and v14, meet:
n12≥1.68,v12<45，
0.85≥n13/n14≥0.72，
4.95≥v13/v14≥1.85。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520008864.8U CN204439920U (en) | 2015-01-05 | 2015-01-05 | A kind of wide-angle zoom object lens of constant aperture |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520008864.8U CN204439920U (en) | 2015-01-05 | 2015-01-05 | A kind of wide-angle zoom object lens of constant aperture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570301A (en) * | 2015-01-05 | 2015-04-29 | 舜宇光学(中山)有限公司 | Constant-aperture wide-angle varifocus objective |
| CN109425974A (en) * | 2017-09-01 | 2019-03-05 | 罗布照明公司 | Varifocal optical system |
-
2015
- 2015-01-05 CN CN201520008864.8U patent/CN204439920U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570301A (en) * | 2015-01-05 | 2015-04-29 | 舜宇光学(中山)有限公司 | Constant-aperture wide-angle varifocus objective |
| CN109425974A (en) * | 2017-09-01 | 2019-03-05 | 罗布照明公司 | Varifocal optical system |
| CN109425974B (en) * | 2017-09-01 | 2021-04-27 | 罗布照明公司 | Zoom optical system |
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