CN116107073A - Ultra-large multiple low-distortion short wave infrared optical system - Google Patents
Ultra-large multiple low-distortion short wave infrared optical system Download PDFInfo
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- CN116107073A CN116107073A CN202211669859.2A CN202211669859A CN116107073A CN 116107073 A CN116107073 A CN 116107073A CN 202211669859 A CN202211669859 A CN 202211669859A CN 116107073 A CN116107073 A CN 116107073A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 47
- 230000005499 meniscus Effects 0.000 claims abstract description 35
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 11
- 239000006185 dispersion Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000004075 alteration Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
Abstract
The invention relates to an ultra-large multiple low-distortion short wave infrared optical system, which comprises a front fixed group A, a variable-magnification group B, a compensation group C and a rear fixed group D, wherein the front fixed group A consists of a meniscus negative lens A1, a biconvex positive lens A2, a meniscus positive lens A3, a meniscus negative lens A4 and a meniscus positive lens A5; the zoom group B consists of a first gluing group and a biconcave negative lens B4, wherein the first gluing group is formed by closely connecting a meniscus negative lens B1, a biconcave negative lens B2 and a meniscus positive lens B3; the compensation group C consists of a biconvex positive lens C1, a meniscus negative lens C2, a biconvex positive lens C3 and a second gluing group with a meniscus negative lens C4 closely connected; the rear fixed group D consists of a biconcave negative lens D1, a meniscus positive lens D2, a biconvex positive lens D3, a biconcave negative lens D4, a biconvex positive lens D5 and a third gluing group. The invention has reasonable design, realizes ultra-large optical zoom multiple in a short wave infrared band, and is beneficial to the detection of various complex environments; the maximum distortion is less than 1%, and information loss caused by image distortion is avoided.
Description
Technical field:
the invention relates to an ultra-large multiple low-distortion short wave infrared optical system.
The background technology is as follows:
short wave infrared is one of the atmospheric optical windows between the near infrared band and the thermal infrared band. The short-wave infrared image and the visible light are light radiation from the surrounding environment reflected by the ground object target, and the similarity enables the short-wave infrared image to have abundant detail characteristics and be comparable with the short-wave infrared image with the visible light image quality. The ability of short wave infrared smoke transmission, fog transmission imaging and imaging in low illumination environments enables all-day and all-weather observations.
With the development of uncooled short-wave infrared focal plane arrays, short-wave infrared imaging is rapidly developed, and plays an increasingly important role in the fields of science and technology, national economy, national defense, military and the like. Therefore, the development of a short-wave infrared optical system with large multiples has important practical significance.
The invention comprises the following steps:
the invention aims to provide an ultra-large multiple low-distortion short-wave infrared optical system.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the optical system is sequentially provided with a front fixed group A with positive focal power, a variable group B with negative focal power, a compensation group C with positive focal power and a rear fixed group D with positive focal power along the incidence direction of light rays from left to right, wherein the front fixed group A consists of a meniscus negative lens A1, a biconvex positive lens A2, a meniscus positive lens A3, a meniscus negative lens A4 and a meniscus positive lens A5 which are sequentially arranged from left to right; the variable magnification group B consists of a first gluing group and a biconcave negative lens B4, wherein the first gluing group and the biconcave negative lens B4 are closely connected with the biconcave negative lens B2 and the meniscus positive lens B3 which are sequentially arranged from left to right; the compensation group C consists of a biconvex positive lens C1, a meniscus negative lens C2, a biconvex positive lens C3 and a meniscus negative lens C4 which are sequentially arranged from left to right and are closely connected with each other; the rear fixing group D consists of a biconcave negative lens D1, a meniscus positive lens D2, a biconvex positive lens D3 and a biconcave negative lens D4 which are sequentially arranged from left to right, and a third gluing group and a biconvex positive lens D5 which are closely connected.
Further, the air interval between the front fixed group A and the variable-magnification group B is 19.95-218 mm; the air interval between the variable-magnification group B and the compensation group C is 251.46-1.88 mm; the air interval between the variable-magnification group C and the rear fixed group D is 2.57-54.1 mm.
Further, the optical system satisfies: 0.1< fa/f <0.5; -0.1< fb/f <0;0< fc/f <0.1;0< fd/f <0.2; where f is the focal length of the tele of the optical system, fa is the focal length of the front fixed group A, fb is the focal length of the variable group B, fc is the focal length of the compensation group C, fd is the focal length of the rear fixed group D.
Further, at least two positive lenses in the front fixed group A are made of ultra-low dispersion glass.
Further, at least one positive lens in the compensation group C is made of ultra-low dispersion glass.
Further, the length Jiao Jiaoju of the optical system is greater than 1200mm.
Further, the optical system has an optical zoom magnification of greater than 48 times.
Further, the maximum caliber of the optical system is larger than 160mm.
Further, the maximum distortion of the optical system is less than 1%.
Compared with the prior art, the invention has the following effects: the invention has reasonable design, realizes ultra-large optical zoom multiple in a short wave infrared band, and is beneficial to the detection of various complex environments; the maximum distortion is less than 1%, and information loss caused by image distortion is avoided.
Description of the drawings:
FIG. 1 is a schematic view of a wide-angle end optical configuration according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of the front fixing group A according to the embodiment of the present invention;
fig. 3 is a schematic structural diagram of a variable-magnification group B according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the structure of the compensation group C according to the embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the rear fixing group D according to the embodiment of the present invention;
FIG. 6 is an axial chromatic aberration diagram of the operating band at the wide-angle end of an embodiment of the invention;
FIG. 7 is a vertical chromatic aberration diagram of an operating band at the wide-angle end of an embodiment of the present invention;
fig. 8 is a diagram showing the distortion of the working wave Duan Changqu at the wide-angle end according to an embodiment of the present invention;
FIG. 9 is a graph of the operating band transfer function at the wide-angle end of an embodiment of the present invention;
FIG. 10 is an axial chromatic aberration diagram of an operating band at a telephoto end according to an embodiment of the present invention;
FIG. 11 is a vertical axis color difference chart of a working band at a telescope end according to the embodiment of the invention;
fig. 12 is a diagram showing the distortion of the working wave Duan Changqu at the telephoto end according to the embodiment of the present invention;
fig. 13 is a diagram of an operating band transfer function of a telephoto end according to an embodiment of the present invention.
In the figure:
a-front fixation group A; a1-a meniscus negative lens A1; a2-biconvex positive lens A2; a3-meniscus positive lens A3; a4-meniscus negative lens A4; a5-meniscus positive lens A5; b-variable magnification group B; b1-meniscus negative lens B1; b2-biconcave negative lens B2; b3-meniscus positive lens B3; b4—biconcave negative lens B4; c-compensation group C; c1-biconvex positive lens C1; a C2-meniscus negative lens C2; c3-biconvex positive lens C3; a C4-meniscus negative lens C4; d-post-fixation group D; d1—biconcave negative lens D1; d2-meniscus positive lens D2; d3—biconvex positive lens D3; d4—biconcave negative lens D4; d5—biconvex positive lens D5.
The specific embodiment is as follows:
the invention will be described in further detail with reference to the drawings and the detailed description.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1, the invention provides an ultra-large multiple low-distortion short-wave infrared optical system, which is sequentially provided with a front fixed group A with positive focal power, a variable group B with negative focal power, a compensation group C with positive focal power and a rear fixed group D with positive focal power along the incidence direction of light rays from left to right.
In this embodiment, the front fixed group a is composed of a meniscus negative lens A1, a biconvex positive lens A2, a meniscus positive lens A3, a meniscus negative lens A4, and a meniscus positive lens A5, which are sequentially arranged from left to right.
In this embodiment, the variable magnification group B is composed of a first gluing group, in which the meniscus negative lens B1, the biconcave negative lens B2, and the meniscus positive lens B3 are closely connected, and the biconcave negative lens B4, which are sequentially arranged from left to right.
In this embodiment, the compensation group C is composed of a second bonding group in which a biconvex positive lens C1, a meniscus negative lens C2, a biconvex positive lens C3, and a meniscus negative lens C4 are bonded in this order from left to right.
In this embodiment, the rear fixing group D is composed of a biconcave negative lens D1, a meniscus positive lens D2, a biconvex positive lens D3, a biconcave negative lens D4, and a biconvex positive lens D5, which are sequentially arranged from left to right.
In the embodiment, the air interval between the front fixed group A and the variable-magnification group B is 19.95-218 mm; the air interval between the variable-magnification group B and the compensation group C is 251.46-1.88 mm; the air interval between the variable-magnification group C and the rear fixed group D is 2.57-54.1 mm.
In this embodiment, the optical system satisfies: 0.1< fa/f <0.5; -0.1< fb/f <0;0< fc/f <0.1;0< fd/f <0.2; where f is the focal length of the tele of the optical system, fa is the focal length of the front fixed group A, fb is the focal length of the variable group B, fc is the focal length of the compensation group C, fd is the focal length of the rear fixed group D.
In this embodiment, at least two positive lenses in the front fixed group a are made of ultra-low dispersion glass.
In this embodiment, at least one positive lens in the compensation group C is made of ultra-low dispersion glass.
In this embodiment, the length Jiao Jiaoju of the optical system is greater than 1200mm.
In this embodiment, the optical zoom magnification of the optical system is greater than 48 times.
In this embodiment, the maximum aperture of the optical system is greater than 160mm.
In this embodiment, the maximum distortion of the optical system is less than 1%.
The data of the following table will illustrate the optical parameters of the embodiments of the present invention.
Through the lens parameters, the technical indexes of the optical system are as follows:
(1) Maximum lens aperture = 162 mm;
(2) The optical zoom multiple is more than 48 times
(3) Focal length range = 24.6 mm-1230 mm;
(4) The maximum distortion is less than 1%.
The invention has the advantages that: the ultra-large optical zoom multiple is realized in the short wave infrared band, which is beneficial to the detection of various complex environments; the maximum distortion is less than 1%, and information loss caused by image distortion is avoided.
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.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (9)
1. An ultra-large multiple low-distortion short wave infrared optical system is characterized in that: the optical system is sequentially provided with a front fixed group A with positive focal power, a variable group B with negative focal power, a compensation group C with positive focal power and a rear fixed group D with positive focal power along the incidence direction of light rays from left to right, wherein the front fixed group A consists of a meniscus negative lens A1, a biconvex positive lens A2, a meniscus positive lens A3, a meniscus negative lens A4 and a meniscus positive lens A5 which are sequentially arranged from left to right; the variable magnification group B consists of a first gluing group and a biconcave negative lens B4, wherein the first gluing group and the biconcave negative lens B4 are closely connected with the biconcave negative lens B2 and the meniscus positive lens B3 which are sequentially arranged from left to right; the compensation group C consists of a biconvex positive lens C1, a meniscus negative lens C2, a biconvex positive lens C3 and a meniscus negative lens C4 which are sequentially arranged from left to right and are closely connected with each other; the rear fixing group D consists of a biconcave negative lens D1, a meniscus positive lens D2, a biconvex positive lens D3 and a biconcave negative lens D4 which are sequentially arranged from left to right, and a third gluing group and a biconvex positive lens D5 which are closely connected.
2. The ultra-large multiple low distortion short wave infrared optical system according to claim 1, wherein: the air interval between the front fixed group A and the variable-magnification group B is 19.95-218 mm; the air interval between the variable-magnification group B and the compensation group C is 251.46-1.88 mm; the air interval between the variable-magnification group C and the rear fixed group D is 2.57-54.1 mm.
3. The ultra-large multiple low distortion short wave infrared optical system according to claim 1, wherein: the optical system satisfies: 0.1< fa/f <0.5; -0.1< fb/f <0;0< fc/f <0.1;0< fd/f <0.2; where f is the focal length of the tele of the optical system, fa is the focal length of the front fixed group A, fb is the focal length of the variable group B, fc is the focal length of the compensation group C, fd is the focal length of the rear fixed group D.
4. The ultra-large multiple low distortion short wave infrared optical system according to claim 1, wherein: at least two positive lenses in the front fixed group A are made of ultra-low dispersion glass.
5. The ultra-large multiple low distortion short wave infrared optical system according to claim 1, wherein: at least one positive lens in the compensation group C is made of ultra-low dispersion glass.
6. The ultra-large multiple low distortion short wave infrared optical system according to claim 1, wherein: the length Jiao Jiaoju of the optical system is greater than 1200mm.
7. The ultra-large multiple low distortion short wave infrared optical system according to claim 1, wherein: the optical system has an optical zoom magnification of greater than 48 times.
8. The ultra-large multiple low distortion short wave infrared optical system according to claim 1, wherein: the maximum caliber of the optical system is larger than 160mm.
9. The ultra-large multiple low distortion short wave infrared optical system according to claim 1, wherein: the maximum distortion of the optical system is less than 1%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211669859.2A CN116107073B (en) | 2022-12-25 | 2022-12-25 | Ultra-large multiple low-distortion short wave infrared optical system |
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| CN202211669859.2A CN116107073B (en) | 2022-12-25 | 2022-12-25 | Ultra-large multiple low-distortion short wave infrared optical system |
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| CN116107073A true CN116107073A (en) | 2023-05-12 |
| CN116107073B CN116107073B (en) | 2024-03-15 |
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|---|---|---|---|---|
| JP2008241884A (en) * | 2007-03-26 | 2008-10-09 | Fujinon Corp | High power zoom lens and imaging apparatus |
| US20100302640A1 (en) * | 2009-05-27 | 2010-12-02 | Nikon Corporation | Lens system, optical apparatus and manufacturing method |
| CN110687668A (en) * | 2019-08-29 | 2020-01-14 | 福建福光股份有限公司 | Optical passive type athermal long-focus short-wave infrared continuous zoom lens |
| US20200333621A1 (en) * | 2016-07-15 | 2020-10-22 | Nikon Corporation | Zoom optical system, optical apparatus and method for manufacturing the zoom optical system |
| CN112666692A (en) * | 2020-12-22 | 2021-04-16 | 福建福光股份有限公司 | Large-zoom-ratio ultra-long-focal-length high-definition fog-penetrating lens and imaging method thereof |
| CN114355593A (en) * | 2021-12-29 | 2022-04-15 | 福建福光股份有限公司 | High-definition multi-component large-zoom-ratio optical zoom lens and imaging method thereof |
| CN115032777A (en) * | 2022-06-15 | 2022-09-09 | 湖北华中长江光电科技有限公司 | Double-working-waveband large-magnification wide-temperature continuous zooming optical lens and detector |
| WO2022198787A1 (en) * | 2021-03-22 | 2022-09-29 | 福建福光股份有限公司 | Telephoto visible light continuous zoom lens |
-
2022
- 2022-12-25 CN CN202211669859.2A patent/CN116107073B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008241884A (en) * | 2007-03-26 | 2008-10-09 | Fujinon Corp | High power zoom lens and imaging apparatus |
| US20100302640A1 (en) * | 2009-05-27 | 2010-12-02 | Nikon Corporation | Lens system, optical apparatus and manufacturing method |
| US20200333621A1 (en) * | 2016-07-15 | 2020-10-22 | Nikon Corporation | Zoom optical system, optical apparatus and method for manufacturing the zoom optical system |
| CN110687668A (en) * | 2019-08-29 | 2020-01-14 | 福建福光股份有限公司 | Optical passive type athermal long-focus short-wave infrared continuous zoom lens |
| CN112666692A (en) * | 2020-12-22 | 2021-04-16 | 福建福光股份有限公司 | Large-zoom-ratio ultra-long-focal-length high-definition fog-penetrating lens and imaging method thereof |
| WO2022198787A1 (en) * | 2021-03-22 | 2022-09-29 | 福建福光股份有限公司 | Telephoto visible light continuous zoom lens |
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| CN115032777A (en) * | 2022-06-15 | 2022-09-09 | 湖北华中长江光电科技有限公司 | Double-working-waveband large-magnification wide-temperature continuous zooming optical lens and detector |
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| CN116107073B (en) | 2024-03-15 |
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