CN111077665B - Low-cost compact type large zoom ratio catadioptric continuous zooming system - Google Patents
Low-cost compact type large zoom ratio catadioptric continuous zooming system Download PDFInfo
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- CN111077665B CN111077665B CN201911395011.3A CN201911395011A CN111077665B CN 111077665 B CN111077665 B CN 111077665B CN 201911395011 A CN201911395011 A CN 201911395011A CN 111077665 B CN111077665 B CN 111077665B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0804—Catadioptric systems using two curved mirrors
- G02B17/0808—Catadioptric systems using two curved mirrors on-axis systems with at least one of the mirrors having a central aperture
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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
- G02B15/16—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/177—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
Abstract
The invention provides a low-cost compact large-zoom-ratio catadioptric continuous zoom system. The zoom system comprises a reflector group, a focusing group, a zoom group, a compensation group, a rear fixing group and an optical filter which are coaxially arranged from left to right in sequence, wherein each lens adopts a spherical lens; the reflector group comprises a front correcting lens with positive focal power, a secondary lens with positive focal power and a primary lens with negative focal power which are horizontally arranged from left to right in sequence; a light through hole for light beams to pass through is formed in the center of the main mirror, and a middle primary image surface is formed at the light through hole; an aperture diaphragm is arranged at the maximum clear aperture of the transmission surface of the primary mirror; the zoom group and the compensation group form an inverted positive group compensation zoom nucleus; the zoom group has positive focal power as a whole, and the compensation group has negative focal power as a whole; the zoom group can move along the optical axis, and the compensation group performs motion compensation on the zoom group so as to realize magnification change and image surface position stabilization of the zoom system. The invention has compact structure, large zoom ratio and low cost.
Description
Technical Field
The invention belongs to the technical field of photoelectric imaging, and particularly relates to a catadioptric continuous zooming optical system with low cost and compact structure.
Background
The continuous zoom system is an optical system in which the focal length is continuously variable within a certain range and the image plane is kept unchanged. At present, there are two main structural forms of a long-focus and zoom optical system: refractive and catadioptric hybrids. For the refractive long focal length system, it is necessary to use larger-caliber abnormal dispersion optical materials (such as calcium fluoride, FK glass and TF glass) to correct the second-order spectrum of the system, and since the large-caliber special optical materials are expensive and difficult to obtain, and the optical properties (such as bubble size, uniformity, etc.) of the materials are not good, the development of the long focal length, zoom refractive system is limited to a large extent. For the traditional catadioptric hybrid zoom system, the reflecting element does not generate chromatic aberration, and the correction pressure of the two-level spectrum of the system is greatly reduced, but the traditional catadioptric zoom system mostly adopts a switching mode instead of a continuous zoom mode. Even if some catadioptric systems are designed in a continuous zooming mode, the systems generally need to adopt an aspheric primary mirror and an aspheric secondary mirror, so that the manufacturing and assembling cost of the systems is high, and the zoom ratio is not high. In addition, in some catadioptric zoom systems, the short focus position beam does not completely fill the full aperture of the primary mirror during zooming.
Chinese patent document CN103913840A discloses a large-aperture catadioptric three-component continuous zooming optical system, which realizes continuous zooming of 2000-6000 mm, has a working wavelength of 500-800 nm and a field of view of 0.33-0.14 degrees, but has a small zoom ratio of only 3 times, and both primary and secondary lenses adopt aspheric surfaces.
Chinese patent document CN107643592A discloses a long-focus variable-focus catadioptric optical system, which realizes four focal lengths of 3.5m, 5m, 7m and 10m by replacing different lens groups, and belongs to a switching catadioptric zoom system.
Chinese patent document CN106772963A discloses a global large-aperture catadioptric continuous zooming optical system, which realizes continuous zooming of 600-3000 mm, the working wave band is 8um-12um, but the zoom ratio is only 5 times, and the short-focus position light beam can not completely fill the full aperture of the primary mirror, thus the short-focus performance of the system can not be fully exerted.
In general, the telephoto ratio (the ratio of the total length of the optical system to the focal length of the telephoto) of the zoom system (the total transmission type and the catadioptric type) is greater than 0.5, and the miniaturization design is difficult to realize.
Therefore, the currently disclosed catadioptric zoom system generally has the disadvantages of small zoom ratio, non-compact structure, high cost, and the like.
Disclosure of Invention
The purpose of the invention is: the problems that an existing catadioptric zooming optical system is small in zoom ratio, high in processing cost, not compact in structure, difficult to achieve high zoom ratio, small in design and the like are solved.
In order to achieve the purpose, the invention provides a new zooming optical structure form, which adopts design ideas such as a secondary imaging light path, a novel zooming core structure (an inverted positive group compensation zooming core), a global surface reflector and the like to realize a large zoom ratio, refraction and reflection and global surface continuous zooming optical system, and the system has the characteristics of large zoom ratio, compact structure, low cost, long focal length, excellent imaging and the like, and simultaneously has visible light imaging and optical fog penetration functions.
The technical scheme of the invention is as follows:
the low-cost compact large-zoom-ratio catadioptric continuous zoom system comprises a reflector group, a focusing group, a zoom group, a compensation group, a rear fixing group and an optical filter which are coaxially arranged from left to right horizontally, wherein each lens adopts a spherical lens;
the left side of the reflector group is an object space, and the right side of the optical filter is an image surface; the reflector group comprises a front correcting lens with positive focal power, a secondary lens with positive focal power and a primary lens with negative focal power which are horizontally arranged from left to right in sequence; the left side surface of the secondary mirror is a secondary mirror reflecting surface, and the right side surface of the secondary mirror is a transmission surface; the left side surface of the main mirror is a transmission surface, the right side surface of the main mirror is a reflection surface, a light through hole for light beams to pass through is formed in the center of the main mirror, and a middle primary image surface is formed at the light through hole; an aperture diaphragm is arranged at the maximum clear aperture of the transmission surface of the primary mirror;
the zoom group and the compensation group form an inverted positive group compensation zoom nucleus; the zoom group has positive focal power as a whole, and the compensation group has negative focal power as a whole; the zoom group can move along the optical axis, and the compensation group performs motion compensation on the zoom group at the same time so as to realize magnification change of the zoom system and stable image surface position (for the purpose of realizing compact structure, a certain zoom position in the whole focal length section is required to meet the positive group compensation root-changing condition, namely when the magnification of the zoom group is-1 at a certain zoom position, the magnification of the compensation group is-1);
an incident beam from an object space passes through the front correcting mirror, is reflected to the secondary mirror through the main mirror, is reflected by the secondary mirror, passes through a light through hole in the center of the main mirror, and sequentially passes through the focusing group, the compensation group, the zooming group, the rear fixing group and the optical filter to irradiate to an image surface.
Based on the scheme, the invention further optimizes the following important steps:
the focal power of each component in the zoom system satisfies the following conditions:
2≤∣f1/fL∣≤3；
0.2≤∣f2/fL∣≤0.5；
0.1≤∣f3/fL∣≤0.3；
-0.2<f4/fL<0；
∣f5/fL∣≤0.1；
f3>0；
f4<0；
in the formula:
fL is the short focal length of the optical system; based on the short-focus focal length, the focal lengths of the focusing group, the zooming group, the compensation group and the like can be controlled within a reasonable range;
f1 is the focal length of the reflector set;
f2 is the focal length of the focusing group;
f3 is focal length of variable magnification group;
f4 is the compensation group focal length;
f5 is the back fixed set focal length.
The refractive index of the optical material of the primary mirror is more than or equal to 1.8 and less than or equal to n1 and less than or equal to 2.0, and the refractive index of the optical material of the secondary mirror is more than or equal to 1.60 and less than or equal to n2 and less than or equal to 1.8.
The front correcting lens of the reflector group adopts a first plano-convex positive lens, the primary lens adopts a first negative meniscus lens, and the secondary lens adopts a first positive meniscus lens; the convex surface bending directions of the first plano-convex positive lens, the first negative meniscus lens and the first positive meniscus lens are deviated from the image surface.
The focusing group adopts a second positive meniscus lens, and the convex surface of the second positive meniscus lens is bent in a direction away from the image surface.
The zoom group comprises a second negative meniscus lens and a first biconvex positive lens which are arranged horizontally from left to right in sequence, and the concave surface of the second negative meniscus lens is bent to the image surface; the compensation group comprises a first biconcave negative lens and a third meniscus negative lens which are sequentially arranged from left to right, and the convex surface of the third meniscus negative lens is bent in a direction deviating from the image surface.
The rear fixed group comprises a second plano-convex positive lens, a cemented lens, a third plano-convex positive lens and a third meniscus positive lens which are sequentially arranged from left to right horizontally; the cemented lens is formed by cementing a negative lens and a positive lens, and the cemented surface deviates from the aperture diaphragm and bends to the image surface; the convex surface of the second plano-convex positive lens is bent in a direction away from the image surface, and the convex surfaces of the third plano-convex positive lens and the third meniscus positive lens are bent in a direction away from the aperture diaphragm.
The optical filter comprises at least two optical filters with different transmission wavelengths, and is used for switching according to requirements, and the position of the optical filter in an optical path is unchanged.
The two filters are absorption filters and have different spectral transmission ranges and different center thicknesses so as to respectively compensate chromatic aberration of the optical systems of the spectral bands, thereby ensuring the required spectral transmission range and reducing the possible stray light interference generated by the filters. Among them, the absorption filter is selected in consideration that although the reflection filter has the same transmission spectrum as the absorption filter, the reflection filter has a high surface reflectance and tends to generate stray light as compared with the absorption filter.
The root changing point of the zoom system is located at a short-focus position, the short-focus focal length fL is 250mm, and the magnification of the position variable magnification group and the magnification of the compensation group are both-1.
The references to "left" and "right" are relative orientations, and are intended to define a direction for ease of description and not to limit the absolute spatial location of the product.
Compared with the prior art, the invention has the advantages that:
1. the invention adopts the design ideas of a secondary imaging light path, a novel zooming core structure (an inverted positive group compensation zooming core), a global surface reflector and the like, and realizes a global surface continuous zooming optical system with compact structure, low cost, large zoom ratio and refraction and reflection.
2. The invention adopts the lens group with positive focal power as the zoom group, the lens group with negative focal power (an inverted positive group compensation mode) as the compensation group, and the positive focal power lens group is positioned at the left side of the negative focal power lens group, thereby breaking through the limitation that the zoom group is negative focal power and the compensation group is positive focal power in the traditional positive group compensation nucleus, and the negative focal power group is positioned at the left side of the positive focal power group. The focal length design of a miniature refractive-reflective zoom optical system with a large zoom ratio is realized by reasonably controlling the focal power of each group in an inverted positive group compensation mode.
3. The zoom ratio (the ratio of the total length of the optical system to the focal length of the telephoto) of the zoom system is more than 0.5, the zoom ratio is only 0.21, and the zoom lens is very compact and small in structure.
4. Each lens of the optical system adopts a spherical lens, so that good imaging quality can be obtained without an aspheric surface, the system cost is low, and the processing and the assembly are convenient.
5. The optical system has the characteristics of long focal length, large relative aperture, low cost, excellent imaging, strong environmental adaptability and the like, realizes the good environmental adaptability of the large-aperture long focal length system at wide working temperature, compensates through the axial movement of the focusing set, and can ensure that the image surface cannot be out of focus at temperature.
Drawings
FIG. 1 is a schematic diagram of an optical configuration of one embodiment of the present invention;
FIG. 2 is a schematic diagram of the embodiment in the short focus position;
FIG. 3 is a schematic diagram of the embodiment in the mid-focus position;
FIG. 4 is a schematic structural view of the embodiment in the tele position;
FIG. 5 is a graph of the optical transfer function for the short focus position of the embodiment;
FIG. 6 is a graph of the optical transfer function for the intermediate focus position of the embodiment;
FIG. 7 is a graph of the optical transfer function for the embodiment in the tele position.
The reference numerals in the drawings are explained as follows:
1-a reflector group, 101-a front correcting mirror, 102-a primary mirror and 103-a secondary mirror;
2-intermediate primary image plane;
3-a focusing group;
4-zoom group, 401-second meniscus negative lens, 402-first biconvex positive lens;
5-compensation group, 501-first biconcave negative lens, 502-third meniscus negative lens;
6-rear fixed group, 601-second plano-convex positive lens, 602-cemented lens, 603-third plano-convex positive lens, 604-third meniscus positive lens;
7-a switchable filter;
and 8, an image surface.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the embodiment provides a low-cost compact large-zoom-ratio catadioptric continuous zoom system, which includes a mirror group 1, a focusing group 3, a zoom group 4, a compensation group 5, a rear fixed group 6 and a switchable filter 7, which are coaxially arranged horizontally from left to right;
the reflector group 1 comprises a front correction lens 101 with positive focal power, a secondary lens 103 with positive focal power and a primary lens 102 with negative focal power which are horizontally arranged from left to right in sequence; the front correcting lens 101 is a first plano-convex positive lens; the primary mirror 102 adopts a first negative meniscus lens made of chemically colorless glass HZLAF75A and having a refractive index of 1.91; the secondary mirror 103 adopts a first positive meniscus lens, the material of the first positive meniscus lens adopts HZBAF21, and the refractive index is 1.72. The convex bending directions of the first plano-convex positive lens, the first negative meniscus lens and the first positive meniscus lens are deviated from the image surface 9;
the left side surface of the secondary mirror 103 is a reflecting surface, and the right side surface is a transmitting surface; the left side surface of the main mirror 102 is a transmission surface, the right side surface is a reflection surface, and the center of the main mirror is provided with a light through hole for light beam to pass through, and the light through hole is a middle primary image surface 2; an aperture diaphragm is arranged at the maximum clear aperture of the transmission surface of the primary mirror 102.
The focusing lens 3 adopts a second positive meniscus lens, and the convex surface of the second positive meniscus lens is bent in a direction away from the image surface 8.
The zoom group 4 comprises a second negative meniscus lens 401 and a first double convex positive lens 402 which are horizontally arranged from left to right in sequence; the concave surface of the second negative meniscus lens 401 is curved toward the image plane 8.
The compensation group 5 comprises a first biconcave negative lens 501 and a third negative meniscus lens 502 which are horizontally arranged from left to right in sequence, and the convex surface of the third negative meniscus lens 502 is bent in a direction away from the image surface 8.
The rear fixed group 6 comprises a second plano-convex positive lens 601, a cemented lens 602, a third plano-convex positive lens 603 and a third meniscus positive lens 604 which are horizontally arranged from left to right in sequence; the second plano-convex positive lens 601 and the third plano-convex positive lens 603 use an anomalous dispersion optical material HFK 61. The cemented lens 602 is formed by cementing a negative lens and a positive lens, and the cemented surface deviates from the aperture diaphragm and bends to the image surface 8; the convex curvature direction of the second plano-convex positive lens 601 deviates from the image plane 8, and the convex curvatures of the third plano-convex positive lens 603 and the third meniscus positive lens 604 deviate from the aperture stop towards the image plane 8.
An incident beam from an object space is transmitted to a reflecting surface of the primary mirror 102 through a transmission surface of the primary mirror 102 after passing through the front correcting mirror 101, and then is irradiated onto the secondary mirror 103 through the transmission surface of the primary mirror 102; the light beam is transmitted to the reflecting surface of the secondary mirror 103 through the transmitting surface of the secondary mirror 103 and then passes through the transmitting surface of the secondary mirror 103; after being refracted and reflected by the secondary mirror 103, the light beam passes through the light-passing hole of the primary mirror 102 and then sequentially passes through the focusing lens 3, the zoom group 4, the compensation group 5, the rear fixed group 6 and the optical filter 7 to be irradiated onto the image surface 8.
In the embodiment, the air interval between the focusing group and the zooming group is 25.83-7.18 mm; the air interval between the zooming group and the compensation group is 10.85 mm-72.58 mm; the air interval between the zooming group and the rear fixing group is 45.08 mm-2.00 mm;
in this embodiment, the focal power of each component of the optical system satisfies the following condition:
2≤∣f1/fL∣≤3；
0.2≤∣f2/fL∣≤0.5；
0.1≤∣f3/fL∣≤0.3；
-0.2<f4/fL<0；
∣f5/fL∣≤0.1；
f3>0
f4<0
in the formula: fL is the short focal length of the optical system;
f1 is the focal length of the reflector set;
f2 is the focal length of the focusing group;
f3 is focal length of variable magnification group;
f4 is the compensation group focal length;
f5 is the rear fixed group focal length;
the method can be specifically configured as follows: | f1/fL | -2.28, | f2/fL | -0.31, | f3/fL | -0.13, f4/fL ═ 0.11, f3 ═ 32, f4 ═ 28.7, f5 ═ 21.
In this embodiment, the primary mirror optical material HZLAF75A has a refractive index of 1.91; the refractive index of the secondary mirror optical material, HZBAF21, was 1.72.
In this embodiment, the root point of the zoom system is located at a short-focus position, i.e. a focal length of 250mm, and the magnification of the zoom group and the compensation group at this position are both-1.
In this embodiment, the optical filter 7 includes two types of optical filters, i.e., a visible light filter and a near infrared filter. The visible light filter material is optical colored glass QB21, and the near infrared filter material is optical colored glass HB 700. The two filters are arranged on the filter wheel and can be switched according to requirements, and the positions of the filters in the light path are unchanged.
In the embodiment, spherical lenses are all adopted, so that a compact catadioptric continuous zoom system with a large zoom ratio, low cost and high compactness, with a focal length of 250-1500 mm and a zoom ratio of 6 times, on a global surface is completed, the working spectral range is 400-900 nm, the system focal length is 250-1500 mm, the F number is F2.1-F12.5, the field angle is 0.2-1.2 degrees, the total length (to an image surface) of an optical system is only 310mm, and the system telephoto ratio (the ratio of the total length of the optical system to the long focal length) is only 0.21. The number of the detector pixels is 752 multiplied by 582, the size of the pixels is 5.5um, and the highest spatial frequency of the detector is 90 lp/mm. The system has the characteristics of low cost, large zoom ratio, long focal length, excellent imaging, visible light and fog penetration dual-band imaging and the like.
The above is only a preferred embodiment of the present invention, the technical solution of the present invention is not limited thereto, and any conventional modifications made by those skilled in the art based on the technical idea of the present invention are within the protection scope of the present invention.
Claims (9)
1. A low-cost compact type large zoom ratio catadioptric continuous zoom system is characterized in that: the optical filter comprises a reflecting mirror group, a focusing group, a zooming group, a compensation group, a rear fixing group and an optical filter which are coaxially arranged from left to right horizontally, wherein each lens adopts a spherical lens;
the left side of the reflector group is an object space, and the right side of the optical filter is an image surface; the reflector group comprises a front correcting lens with positive focal power, a secondary lens with positive focal power and a primary lens with negative focal power which are horizontally arranged from left to right in sequence; the left side surface of the secondary mirror is a secondary mirror reflecting surface, and the right side surface of the secondary mirror is a transmission surface; the left side surface of the main mirror is a transmission surface, the right side surface of the main mirror is a reflection surface, a light through hole for light beams to pass through is formed in the center of the main mirror, and a middle primary image surface is formed at the light through hole; an aperture diaphragm is arranged at the maximum clear aperture of the transmission surface of the primary mirror;
the zoom group and the compensation group form an inverted positive group compensation zoom nucleus; the zoom group has positive focal power as a whole, and the compensation group has negative focal power as a whole; the zoom group can move along the optical axis, and the compensation group performs motion compensation on the zoom group so as to realize magnification change and image surface position stabilization of the zoom system;
an incident beam from an object space passes through the front correcting mirror, is reflected to the secondary mirror through the primary mirror, is reflected by the secondary mirror, passes through a light through hole in the center of the primary mirror, and sequentially passes through the focusing group, the zooming group, the compensation group, the rear fixing group and the optical filter to irradiate to an image surface;
the optical power of each component in the zoom system satisfies the following conditions:
2≤∣f1/fL∣≤3；
0.2≤∣f2/fL∣≤0.5；
0.1≤∣f3/fL∣≤0.3；
-0.2<f4/fL<0；
∣f5/fL∣≤0.1；
f3>0；
f4<0；
in the formula:
fL is the short focal length of the optical system;
f1 is the focal length of the reflector set;
f2 is the focal length of the focusing group;
f3 is focal length of variable magnification group;
f4 is the compensation group focal length;
f5 is the back fixed set focal length.
2. The low-cost compact large zoom ratio catadioptric zoom system of claim 1, wherein: the refractive index of the optical material of the primary mirror is more than or equal to 1.8 and less than or equal to n1 and less than or equal to 2.0, and the refractive index of the optical material of the secondary mirror is more than or equal to 1.60 and less than or equal to n2 and less than or equal to 1.8.
3. The low-cost compact large zoom ratio catadioptric zoom system of claim 1, wherein: the front correcting lens of the reflector group adopts a first plano-convex positive lens, the primary lens adopts a first negative meniscus lens, and the secondary lens adopts a first positive meniscus lens; the convex surface bending directions of the first plano-convex positive lens, the first negative meniscus lens and the first positive meniscus lens are deviated from the image surface.
4. The low-cost compact large zoom ratio catadioptric zoom system of claim 1, wherein: the focusing group adopts a second positive meniscus lens, and the convex surface of the second positive meniscus lens is bent in a direction away from the image surface.
5. The low-cost compact large zoom ratio catadioptric zoom system of claim 1, wherein: the zoom group comprises a second negative meniscus lens and a first biconvex positive lens which are arranged horizontally from left to right in sequence, and the concave surface of the second negative meniscus lens is bent to the image surface; the compensation group comprises a first biconcave negative lens and a third meniscus negative lens which are sequentially arranged from left to right, and the convex surface of the third meniscus negative lens is bent in a direction deviating from the image surface.
6. The low-cost compact large zoom ratio catadioptric zoom system of claim 1, wherein: the rear fixed group comprises a second plano-convex positive lens, a cemented lens, a third plano-convex positive lens and a third meniscus positive lens which are sequentially arranged from left to right horizontally; the cemented lens is formed by cementing a negative lens and a positive lens, and the cemented surface deviates from the aperture diaphragm and bends to the image surface; the convex surface of the second plano-convex positive lens is bent in a direction away from the image surface, and the convex surfaces of the third plano-convex positive lens and the third meniscus positive lens are bent in a direction away from the aperture diaphragm.
7. The low-cost compact large zoom ratio catadioptric zoom system of claim 1, wherein: the optical filter comprises at least two optical filters with different transmission wavelengths, and is used for switching according to requirements, and the position of the optical filter in the optical path is unchanged.
8. The low-cost compact large zoom ratio catadioptric zoom system of claim 7, wherein: the two filters are absorption filters and have different spectral transmission ranges and different center thicknesses so as to respectively compensate chromatic aberration of the optical systems of the spectral bands.
9. The low-cost compact large zoom ratio catadioptric zoom system of claim 1, wherein: the root changing point of the zoom system is located at a short-focus position, the short-focus focal length fL is 250mm, and the magnification of the position variable magnification group and the magnification of the compensation group are both-1.
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| CN113325571B (en) * | 2021-05-26 | 2024-01-30 | 长春理工大学 | Compact type target detection optical system with large relative aperture length Jiao Gaoqing |
| CN115185074B (en) * | 2022-07-19 | 2023-06-06 | 凯迈（洛阳）测控有限公司 | Catadioptric miniaturized shortwave infrared imaging optical system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5940222A (en) * | 1997-10-27 | 1999-08-17 | Wescam Inc. | Catadioptric zoom lens assemblies |
| CN106990517A (en) * | 2017-05-22 | 2017-07-28 | 凯迈（洛阳）测控有限公司 | A kind of object lens of large relative aperture long-focus uncooled ir is without thermalization optical system |
| CN107942480A (en) * | 2017-12-14 | 2018-04-20 | 中国科学院光电技术研究所 | A kind of catadioptric mixing infrared optical imaging system of new zoom ratio |
| CN108319006A (en) * | 2018-04-18 | 2018-07-24 | 西安中科飞图光电科技有限公司 | Compact high magnification high definition continuous zooming optical system |
| CN109597187A (en) * | 2018-12-24 | 2019-04-09 | 中国科学院西安光学精密机械研究所 | A kind of large-aperture long-focus is passively without thermalization visible light optical system |
| JP2019090890A (en) * | 2017-11-14 | 2019-06-13 | 株式会社ｎｉｔｔｏｈ | Imaging optical system and imaging apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10514529B2 (en) * | 2017-03-06 | 2019-12-24 | Fotonation Limited | Portrait lens system formed with an adjustable meniscus lens |
-
2019
- 2019-12-30 CN CN201911395011.3A patent/CN111077665B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5940222A (en) * | 1997-10-27 | 1999-08-17 | Wescam Inc. | Catadioptric zoom lens assemblies |
| CN106990517A (en) * | 2017-05-22 | 2017-07-28 | 凯迈（洛阳）测控有限公司 | A kind of object lens of large relative aperture long-focus uncooled ir is without thermalization optical system |
| JP2019090890A (en) * | 2017-11-14 | 2019-06-13 | 株式会社ｎｉｔｔｏｈ | Imaging optical system and imaging apparatus |
| CN107942480A (en) * | 2017-12-14 | 2018-04-20 | 中国科学院光电技术研究所 | A kind of catadioptric mixing infrared optical imaging system of new zoom ratio |
| CN108319006A (en) * | 2018-04-18 | 2018-07-24 | 西安中科飞图光电科技有限公司 | Compact high magnification high definition continuous zooming optical system |
| CN109597187A (en) * | 2018-12-24 | 2019-04-09 | 中国科学院西安光学精密机械研究所 | A kind of large-aperture long-focus is passively without thermalization visible light optical system |
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