CN114355589B - 31-time miniaturized continuous zoom lens - Google Patents
31-time miniaturized continuous zoom lens Download PDFInfo
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- CN114355589B CN114355589B CN202111624702.3A CN202111624702A CN114355589B CN 114355589 B CN114355589 B CN 114355589B CN 202111624702 A CN202111624702 A CN 202111624702A CN 114355589 B CN114355589 B CN 114355589B
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- 239000003292 glue Substances 0.000 claims description 12
- 238000003384 imaging method Methods 0.000 claims description 7
- 125000005647 linker group Chemical group 0.000 claims description 5
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
- G02B15/1441—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive
- G02B15/144113—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive arranged +-++
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/15—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective compensation by means of only one movement or by means of only linearly related movements, e.g. optical compensation
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- Optics & Photonics (AREA)
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Abstract
The invention relates to a 31-time miniaturized continuous zoom lens, an optical system of the lens comprises a front fixed group A with positive focal power, a zoom group B with negative focal power, a compensation group C with positive focal power and a rear fixed group E with positive focal power, which are sequentially arranged along an incident light path; the front fixed group A is sequentially provided with a positive moon lens A-1, a first gluing group formed by closely connecting a negative meniscus lens A-2 and a positive moon lens A-3, and a positive moon lens A-4; the zoom group B is sequentially provided with a second gluing group which is formed by closely connecting a negative meniscus lens B-1 with a positive meniscus lens B-2, a negative meniscus lens B-3 and a negative meniscus lens B-4; the compensation group C is provided with a positive crescent lens C-1 and a positive crescent lens C-2, and a third gluing group is formed by closely connecting a negative crescent lens C-3 and a positive biconvex lens C-4; the rear fixing group E is provided with a fourth gluing group closely connected with the negative biconcave lens E-2 by the positive crescent lens E-1, a positive biconvex lens E-3, a fifth gluing group closely connected with the negative biconcave lens E-5 by the positive biconvex lens E-4 and a positive biconvex lens E-6.
Description
Technical Field
The invention relates to the technical field of photoelectricity, in particular to a 31-time miniaturized continuous zoom lens.
Background
The existing airborne photoelectric pod detection system is required to be small in size, light in weight, large in detection distance and high in definition, can continuously observe under severe weather conditions such as fog, rain, snow and the like, and can be used for carrying out panoramic search of large area and small multiplying power and carrying out amplification observation of small area and large multiplying power on a target. The optical structure form of the traditional mechanical compensation type varifocal lens consists of four components of a front fixed group, a variable magnification group, a compensation group and a rear fixed group, but the defects of large volume, small variable magnification ratio, low resolution, small acting distance and the like commonly exist, and the detection capability of an airborne system is seriously influenced.
Disclosure of Invention
In view of the above, the present invention aims to provide a 31-fold miniaturized continuous zoom lens with small volume, large zoom ratio and high resolution.
The invention is realized by adopting the following scheme: an optical system of the 31-time miniaturized continuous zoom lens consists of a front fixed group A with positive focal power, a variable-power group B with negative focal power, a compensation group C with positive focal power and a rear fixed group E with positive focal power, which are sequentially arranged along an incident light path; the front fixing group A consists of a positive moon lens A-1, a first gluing group formed by closely connecting a negative meniscus lens A-2 and a positive moon lens A-3 and a positive moon lens A-4 which are sequentially arranged; the zoom group B consists of a second gluing group which is formed by closely connecting a negative meniscus lens B-1 and a positive meniscus lens B-2, a negative meniscus lens B-3 and a negative meniscus lens B-4 which are sequentially arranged; the compensation group C consists of a positive crescent lens C-1 and a positive crescent lens C-2 which are sequentially arranged, and a third gluing group which is closely connected with the positive biconvex lens C-4 by a negative meniscus lens C-3; the rear fixing group E consists of a fourth gluing group which is formed by closely connecting a positive crescent lens E-1 and a negative biconcave lens E-2, a positive biconvex lens E-3, a fifth gluing group which is formed by closely connecting a positive biconvex lens E-4 and a negative biconcave lens E-5 and a positive biconvex lens E-6, wherein the fourth gluing group, the positive biconvex lens E-3 and the fifth gluing group and the positive biconvex lens E-6 are sequentially arranged.
Further, a color filter assembly is disposed behind the rear fixing group E.
Further, the focal length f' of the small view field of the lens and the length L of the first mirror surface of the lens to the imaging surface on the optical axis satisfy the relation: l/f' is less than or equal to 0.57.
Further, the focal length fA' of the front lens fixed group a, and the length L between the first lens surface and the imaging surface on the optical axis satisfy the following relation: fA'/L is more than or equal to 0.6 and less than or equal to 0.65.
Further, the focal length fB ' of the lens variable component B ', the focal length fC ' of the lens compensating component C satisfy the relationship: -0.65 < fB '/fC' < -0.6.
Further, the air interval between the front fixed group A and the variable-magnification group B is 1.9-71.9 mm; the air interval between the variable-magnification group B and the compensation group C is 104-2.8 mm; the air interval between the compensation group C and the rear fixing group E is 3.8-35 mm.
Further, the air interval between the orthodontic tooth lens A-1 and the first bonding group is 11.5mm, and the air interval between the first bonding group and the orthodontic tooth lens A-4 is 1.8mm; the air space between the second glue group and the negative meniscus lens B-3 is 10.95mm, and the air space between the negative meniscus lens B-3 and the negative meniscus lens B-4 is 1.9mm; the air interval between the positive crescent lens C-1 and the positive crescent lens C-2 is 0.1mm, and the air interval between the positive crescent lens C-2 and the third bonding group is 0.2mm; the air space between the fourth glue group and the positive lenticular lens E-3 is 0.5mm, the air space between the positive lenticular lens E-3 and the fifth glue group is 3.4mm, and the air space between the fifth glue group and the positive lenticular lens E-6 is 0.5mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) The miniaturization is realized, the total length of the optical system is shortened as much as possible, the radial dimension is reduced, the total optical length of the lens is less than 239mm, the L/f' is less than or equal to 0.57, and the whole system is small in size;
(2) In order to pursue higher resolution, in the optical design, a gluing group and an orthodontic lens are arranged in a front fixing group, and the two orthodontic lenses bent to the diaphragm surface are made of ultra-low dispersion optical materials, so that aberrations such as a secondary spectrum of an optical lens are effectively reduced, the resolution of the lens is obviously improved, two million pixels are reached, and the optical lens can be matched with a high-definition camera.
(3) The lens has larger zoom ratio, higher resolution and wider application range than the common optical lens, and is suitable for complex airborne environment conditions.
The present invention will be further described in detail below with reference to specific embodiments and associated drawings for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
Drawings
FIG. 1 is a schematic diagram of an optical system according to an embodiment of the present invention;
FIG. 2 is a graph of a large field of view MTF according to an embodiment of the present invention;
FIG. 3 is a graph of a small field of view MTF curve in accordance with an embodiment of the present invention;
FIG. 4 is a graph of large field aberration in accordance with an embodiment of the present invention;
FIG. 5 is a plot of aberration of a small field of view according to an embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1 to 5, an optical system of the 31-fold miniaturized continuous zoom lens is composed of a front fixed group a with positive focal power, a variable-magnification group B with negative focal power, a compensation group C with positive focal power and a rear fixed group E with positive focal power, which are sequentially arranged along an incident light path; the front fixing group A consists of a positive moon lens A-1, a first gluing group formed by closely connecting a negative meniscus lens A-2 and a positive moon lens A-3 and a positive moon lens A-4 which are sequentially arranged; the zoom group B consists of a second gluing group which is formed by closely connecting a negative meniscus lens B-1 and a positive meniscus lens B-2, a negative meniscus lens B-3 and a negative meniscus lens B-4 which are sequentially arranged; the compensation group C consists of a positive crescent lens C-1 and a positive crescent lens C-2 which are sequentially arranged, and a third gluing group which is closely connected with the positive biconvex lens C-4 by a negative meniscus lens C-3; the rear fixing group E consists of a fourth gluing group which is formed by closely connecting a positive crescent lens E-1 and a negative biconcave lens E-2, a positive biconvex lens E-3, a fifth gluing group which is formed by closely connecting a positive biconvex lens E-4 and a negative biconcave lens E-5 and a positive biconvex lens E-6 which are sequentially arranged; in order to pursue higher resolution, the front fixed group is provided with the gluing group and the orthodontic lens, and the two orthodontic lenses bent to the diaphragm surface are made of ultra-low dispersion optical materials, so that the second-level spectrum and other aberrations of the optical lens are effectively reduced, the resolution of the lens is obviously improved, two million pixels are reached, and the lens can be matched with a high-definition camera, so that the lens has a larger zoom ratio, higher resolution and wider application range than a common optical lens, and is suitable for complex airborne environmental conditions.
The lens has the functions of continuous electric zooming, electric focusing, electric dimming, color filter switching, focal length real-time feedback and the like; the maximum speed change Jiao Tulun curve design is adopted, so that the moving range of the zoom group and the compensation group of the system is as small as possible,
in this embodiment, a color filter assembly is disposed behind the rear fixed group E, and a visible light color filter F-1 and a near infrared band color filter F-2 are respectively disposed in the color filter assembly; the high-precision color filter switching device is arranged, the color filter switching mechanism is controlled by driving of the micro motor, so that near infrared wave band is high in transparency, and the fog penetrating function is realized by utilizing the characteristic that the wavelength of the near infrared wave band is longer and fine particles can be diffracted; compared with a conventional lens, the detection capability of the imaging system for long-distance targets in weather conditions such as fog, rain, snow and dust is improved.
In this embodiment, the focal length f' of the small field of view of the lens, and the length L between the first mirror surface of the lens and the imaging surface on the optical axis satisfy the following relation: l/f' is less than or equal to 0.57.
In the present embodiment, the focal length fA' of the lens front fixed group a, the length L of the lens first mirror to the imaging surface on the optical axis, satisfies the relationship: fA'/L is more than or equal to 0.6 and less than or equal to 0.65.
In the present embodiment, the focal length fB ' of the lens variable component B ' and the focal length fC ' of the lens compensating component C satisfy the relationship: -0.65 < fB '/fC' < -0.6.
In the embodiment, the air interval between the front fixed group A and the variable magnification group B is 1.9-71.9 mm; the air interval between the variable-magnification group B and the compensation group C is 104-2.8 mm; the air interval between the compensation group C and the rear fixing group E is 3.8-35 mm.
In the embodiment, the air interval between the orthodontic tooth lens A-1 and the first gluing group is 11.5mm, and the air interval between the first gluing group and the orthodontic tooth lens A-4 is 1.8mm; the air space between the second glue group and the negative meniscus lens B-3 is 10.95mm, and the air space between the negative meniscus lens B-3 and the negative meniscus lens B-4 is 1.9mm; the air interval between the positive crescent lens C-1 and the positive crescent lens C-2 is 0.1mm, and the air interval between the positive crescent lens C-2 and the third bonding group is 0.2mm; the air space between the fourth glue group and the positive lenticular lens E-3 is 0.5mm, the air space between the positive lenticular lens E-3 and the fifth glue group is 3.4mm, and the air space between the fifth glue group and the positive lenticular lens E-6 is 0.5mm.
The specific parameters of each lens in the optical system of this embodiment are shown in the following table:
optical indexes achieved by the camera lens are as follows:
1. focal length: f' =13.5 mm to 420mm;
2. relative pore size: the large visual field D/f 'is better than 1/3.5, and the small visual field D/f' is better than 1/6;
3. the total optical length is less than 239mm;
4. wide-angle end focal length f '=13.5 mm, and telephoto end focal length f' =420 mm.
Any of the above-described embodiments of the present invention disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the invention, and the numerical values listed above should not limit the protection scope of the invention.
If the invention discloses or relates to components or structures fixedly connected with each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (4)
1. A 31-fold miniaturized continuous zoom lens, characterized in that: the optical system of the lens consists of a front fixed group A with positive focal power, a variable-magnification group B with negative focal power, a compensation group C with positive focal power and a rear fixed group E with positive focal power, which are sequentially arranged along an incident light path; the front fixing group A consists of a positive moon lens A-1, a first gluing group formed by closely connecting a negative meniscus lens A-2 and a positive moon lens A-3 and a positive moon lens A-4 which are sequentially arranged; the zoom group B consists of a second gluing group which is formed by closely connecting a negative meniscus lens B-1 and a positive meniscus lens B-2, a negative meniscus lens B-3 and a negative meniscus lens B-4 which are sequentially arranged; the compensation group C consists of a positive crescent lens C-1 and a positive crescent lens C-2 which are sequentially arranged, and a third gluing group which is closely connected with the positive biconvex lens C-4 by a negative meniscus lens C-3; the rear fixing group E consists of a fourth gluing group which is formed by closely connecting a positive crescent lens E-1 and a negative biconcave lens E-2, a positive biconvex lens E-3, a fifth gluing group which is formed by closely connecting a positive biconvex lens E-4 and a negative biconcave lens E-5 and a positive biconvex lens E-6 which are sequentially arranged; the focal length f' of the small view field of the lens and the length L of the first mirror surface of the lens to the imaging surface on the optical axis satisfy the relation: l/f' is less than or equal to 0.57; the focal length fA' of the lens front fixed group a, and the length L of the lens first mirror surface to the imaging surface on the optical axis satisfy the relation: fA'/L is more than or equal to 0.6 and less than or equal to 0.65; the focal length fB ' of the lens magnification-varying component B ', and the focal length fC ' of the lens compensation component C satisfy the relation: -0.65 < fB '/fC' < -0.6.
2. The 31-fold miniaturized continuous zoom lens of claim 1, wherein: a color filter assembly is arranged behind the rear fixing group E.
3. The 31-fold miniaturized continuous zoom lens of claim 1, wherein: the air interval between the front fixed group A and the variable-magnification group B is 1.9-71.9 mm; the air interval between the variable-magnification group B and the compensation group C is 104-2.8 mm; the air interval between the compensation group C and the rear fixing group E is 3.8-35 mm.
4. A 31-fold miniaturized continuous zoom lens according to claim 3, wherein: the air interval between the orthodontic tooth lens A-1 and the first gluing group is 11.5mm, and the air interval between the first gluing group and the orthodontic tooth lens A-4 is 1.8mm; the air space between the second glue group and the negative meniscus lens B-3 is 10.95mm, and the air space between the negative meniscus lens B-3 and the negative meniscus lens B-4 is 1.9mm; the air interval between the positive crescent lens C-1 and the positive crescent lens C-2 is 0.1mm, and the air interval between the positive crescent lens C-2 and the third bonding group is 0.2mm; the air space between the fourth glue group and the positive lenticular lens E-3 is 0.5mm, the air space between the positive lenticular lens E-3 and the fifth glue group is 3.4mm, and the air space between the fifth glue group and the positive lenticular lens E-6 is 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111624702.3A CN114355589B (en) | 2021-12-29 | 2021-12-29 | 31-time miniaturized continuous zoom lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111624702.3A CN114355589B (en) | 2021-12-29 | 2021-12-29 | 31-time miniaturized continuous zoom lens |
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| Publication Number | Publication Date |
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| CN114355589A CN114355589A (en) | 2022-04-15 |
| CN114355589B true CN114355589B (en) | 2023-07-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118519261A (en) * | 2024-05-29 | 2024-08-20 | 福建福光股份有限公司 | Zoom lens |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5423556A (en) * | 1977-07-22 | 1979-02-22 | Canon Inc | Zoom lens |
| JP4898410B2 (en) * | 2006-12-14 | 2012-03-14 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
| JP5438620B2 (en) * | 2010-07-29 | 2014-03-12 | 富士フイルム株式会社 | Zoom lens and imaging device |
| WO2014196022A1 (en) * | 2013-06-04 | 2014-12-11 | Cbc株式会社 | Zoom lens |
| CN107255861B (en) * | 2017-08-10 | 2019-10-25 | 福建福光股份有限公司 | A kind of subminaturization, big multiple proportions, the airborne pick-up lens of high definition zoom |
| JP2019113750A (en) * | 2017-12-25 | 2019-07-11 | オリンパス株式会社 | Zoom optical system, image capturing optical system, and image capturing device having the same |
| CN110716294B (en) * | 2018-07-13 | 2025-04-18 | 嘉兴中润光学科技股份有限公司 | Miniaturized, large-surface, high-definition zoom optical system |
| CN108873277B (en) * | 2018-08-17 | 2021-06-01 | 福建福光股份有限公司 | Compact wide-angle high-zoom-ratio high-definition zoom lens |
| CN208921959U (en) * | 2018-09-04 | 2019-05-31 | 福建福光股份有限公司 | High definition Penetrating Fog broadband visible light camera lens |
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2021
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