CN110579859A - compact type long-focal-length star sensor telecentric optical system - Google Patents
compact type long-focal-length star sensor telecentric optical system Download PDFInfo
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- CN110579859A CN110579859A CN201910826530.4A CN201910826530A CN110579859A CN 110579859 A CN110579859 A CN 110579859A CN 201910826530 A CN201910826530 A CN 201910826530A CN 110579859 A CN110579859 A CN 110579859A
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- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
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- 238000005259 measurement Methods 0.000 description 15
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- 235000019892 Stellar Nutrition 0.000 description 7
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/02—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by astronomical means
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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
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
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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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
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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
- G02B13/22—Telecentric objectives or lens systems
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Abstract
The invention discloses a compact telecentric optical system of a long-focus star sensor, which comprises a front lens group, a reflector group, a rear lens group and an image plane which are sequentially arranged from front to back along the incident direction of light rays, wherein the front lens group comprises a first lens and a second lens which are sequentially arranged from front to back, and the rear lens group comprises a third lens and a fourth lens which are sequentially arranged from front to back; the reflector group comprises a secondary reflector and a main reflector which are sequentially arranged from front to back, a through hole is formed in the middle of the main reflector, the reflecting surfaces of the secondary reflector and the main reflector are opposite, and an aperture diaphragm is arranged on the reflecting surface of the main reflector; the invention adopts a catadioptric structure type based on a global surface optical element, effectively shortens the size of the long-focal-length star sensor optical system, avoids the problem that the wide-spectrum chromatic aberration, particularly the secondary spectrum, is difficult to correct under the condition of long focal length design by adopting a pure transmission type optical system, and solves the design contradiction between light, small size and high precision.
Description
Technical Field
the invention relates to the technical field of optical systems, in particular to a compact long-focus star sensor telecentric optical system.
Background
In the known inertial navigation equipment, the star sensor is used as a measuring instrument with the highest measuring precision, and the measuring precision can reach a sub-second level or even higher. The star sensor adopts an optical system to detect the stellar optical signals with stable distribution of the position and the spectrum in the space, so that the measurement precision does not drift along with time, and stable three-axis attitude angle information output is provided for the long-time high-precision flight of the aerospace craft, thereby being widely applied to the field of high-precision autonomous navigation.
The star sensor optical system is used as a core device of the star sensor and is a key component for realizing high-signal-to-noise ratio constant star spectral energy collection and high-precision star centroid position detection by the star sensor. The object detected by the star sensor optical system is a fixed star with weak energy and wide spectral distribution, and belongs to point target detection. In order to realize sub-pixel subdivision and improve the star position measurement precision, the star light energy needs to be dispersed to 2 x 2 pixels to 5 x 5 pixels for subsequent electronics to carry out subdivision processing so as to achieve the centroid measurement precision of the sub-pixels.
the main parameters of the star sensor optical system comprise focal length, field of view, relative aperture, imaging spectrum, single star measurement accuracy and the like. The focal length of the star sensor optical system is inversely proportional to the single star measurement precision, and the longer the focal length is, the higher the measurement precision is. The focal length of the optical system of the current mainstream star sensor is generally not more than 50mm, most of the focal length is concentrated in the range of 20 mm-30 mm, the detection view field is larger, the detection spectrum range is generally not more than 300nm, the measurement precision of a single star is not high, and the detection capability of the fixed star is limited. In order to pursue higher star detection accuracy, the adoption of a long-focus optical system is an effective means. With the development of the technologies in the fields of high-resolution earth stereo mapping cameras, space astronomical observation telescopes, space guidance weapon systems and the like, the requirements on the star sensor with the sub-second level or even higher precision are provided, and the key performances of high-precision earth positioning, long-time image-stabilized observation or autonomous navigation of flight attitude during long voyage and the like of an application system are met. The core technology is that a long-focus star sensor optical system is adopted to improve the single-pixel resolution, and then a subdivision algorithm is adopted to further improve the accuracy of the centroid resolution.
however, when the focal length of the optical system of the star sensor is close to or reaches the meter level, the pure transmission optical system is not only long in system size, but also difficult to correct the secondary spectral aberration under the broad spectrum, and cannot realize collection of the stellar optical signal of the broad spectrum, and the application requirements of the space platform cannot be met in terms of both the size and the performance; although the reflection type optical system can realize the folding of the optical path and obtain the compact layout design of the optical system, the aspheric surface is needed to be adopted in the aspect of correcting the aberration, the manufacturing and adjusting difficulty is high, and the cost is not reduced.
Disclosure of Invention
The invention provides a compact telecentric optical system of a long-focus star sensor, which has a folded optical path and greatly reduces the size of the optical system on the premise of ensuring the measurement precision.
The solution of the invention for solving the technical problem is as follows: a compact telecentric optical system of a long-focus star sensor comprises a front lens group, a reflector group, a rear lens group and an image plane which are sequentially arranged from front to back along the incident direction of light, wherein the front lens group comprises a first lens and a second lens which are sequentially arranged from front to back, and the rear lens group comprises a third lens and a fourth lens which are sequentially arranged from front to back; the first lens is a biconvex positive focal power lens, the second lens is a plano-concave negative focal power lens, the third lens is a biconcave negative focal power lens, and the fourth lens is a biconvex positive focal power lens;
the reflecting mirror group comprises a secondary reflecting mirror and a main reflecting mirror which are sequentially arranged from front to back, the secondary reflecting mirror is a convex reflecting mirror, the main reflecting mirror is a concave reflecting mirror, a through hole is formed in the middle of the main reflecting mirror, the reflecting surfaces of the secondary reflecting mirror and the main reflecting mirror are opposite, an aperture diaphragm is arranged on the reflecting surface of the main reflecting mirror, and the secondary reflecting mirror and the main reflecting mirror are spherical;
Incident light sequentially passes through the first lens and the second lens and then is emitted to the main reflector, light beams are reflected by the main reflector and reach the secondary reflector, the secondary reflector reflects the light beams to form reflected light, and the reflected light sequentially passes through the third lens and the fourth lens after passing through the through hole of the main reflector.
When the device works, a stellar optical signal firstly passes through a double-separation lens consisting of a first lens and a second lens, and the propagation direction of light rays is basically unchanged; then, the optical signals are collected through the spherical main reflecting mirror and the spherical secondary reflecting mirror, and the reflecting mirror group bears the main focal power of the optical system. Since the mirrors are all spherical, a large amount of aberrations such as spherical aberration, coma, and the like are generated, and these aberrations are mainly corrected by the front lens group. When the focal power of the current lens group is close to zero, even if the same glass material is adopted, the generated axial chromatic aberration and vertical-axis chromatic aberration are very small, and the reflector does not generate chromatic aberration, so that the spectral design of an ultra-wide spectral band is realized. The third lens and the fourth lens of the rear lens group form a double-separation lens, and residual spherical aberration, coma aberration and chromatic aberration are corrected.
The invention has the beneficial effects that: the invention adopts a catadioptric structure type based on a global surface optical element, effectively shortens the size of the long-focal-length star sensor optical system, avoids the problem that the wide-spectrum chromatic aberration, particularly the secondary spectrum, is difficult to correct under the condition of long focal length design by adopting a pure transmission type optical system, and solves the design contradiction between light, small size and high precision.
as a further improvement of the technical scheme, the included angle between the principal ray of the optical system and the optical axis is not more than 0.1 degree, the image space telecentric optical path design is realized, and the measurement error of the star sensor optical system under the environment of space complex mechanical vibration and temperature change is favorably reduced.
As a further improvement of the above technical solution, the focal power of the first lens isThe focal power of the second lens isThe optical system has an optical power ofWhereinandSatisfies the following conditions:
as a further improvement of the technical scheme, the combined focal power of the reflector group isThe optical system has an optical power ofThenandSatisfies the following conditions:
As a further improvement of the above technical solution, the focal power of the rear lens group isThe optical system has an optical power ofThenAndSatisfies the following conditions:
As a further improvement of the above technical solution, when the total length of the optical system is L, where L is a distance from the front surface of the first lens to the image plane, and the total focal length of the optical system is f, L and f satisfy:
L/f≤0.265。
As a further improvement of the technical scheme, the curvature radius of the front surface of the first lens is 645.8mm, the curvature radius of the rear surface of the first lens is-529.5 mm, the center thickness of the first lens is 10mm, and the clear aperture of the first lens isthe curvature radius of the front surface of the second lens is-298.3 mm, the rear surface of the second lens is a plane, the center thickness of the second lens is 6mm, and the clear aperture of the second lens isthe curvature radius of the secondary reflector is-166.8 mm; the curvature radius of the main reflector is-364.8 mm; the curvature radius of the front surface of the third lens is-102.5 mm, the curvature radius of the rear surface of the third lens is 35.6mm, and the center thickness of the third lens is 2.5 mm; the radius of curvature of the front surface of the fourth lens is 36.8mm, the radius of curvature of the rear surface is-102.58 mm, and the center thickness is 14 mm.
As a further improvement of the above technical scheme, the first lens and the second lens are made of crown glass, the third lens is made of heavy lanthanum flint glass, and the fourth lens is made of flint glass.
the optical system is compact in design, the light path under the long focal length is highly folded, the spectral detection of an ultra-wide spectrum band is obtained, the light and small size of the optical system and the image quality close to the diffraction limit are realized, and the star position measurement precision and the star light energy collection efficiency are improved.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is a schematic structural view of an optical system in an embodiment;
FIG. 2 is a graph of an optical transfer function of the optical system in the embodiment;
FIG. 3 is a graph of energy concentration of an optical system in an embodiment;
fig. 4 is a distortion design curve of the optical system in the embodiment.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
embodiment 1, referring to fig. 1, a compact telecentric optical system of a long-focus star sensor includes a front lens group, a reflector group, a rear lens group and an image plane 400 sequentially arranged from front to back along a light incidence direction, where the front lens group includes a first lens 101 and a second lens 102 sequentially arranged from front to back, and the rear lens group includes a third lens 301 and a fourth lens 302 sequentially arranged from front to back; the first lens 101 is a biconvex positive focal power lens, the second lens 102 is a plano-concave negative focal power lens, the third lens 301 is a biconcave negative focal power lens, and the fourth lens 302 is a biconvex positive focal power lens;
The reflector group comprises a secondary reflector 201 and a main reflector 202 which are sequentially arranged from front to back, the secondary reflector 201 is a convex reflector, the main reflector 202 is a concave reflector, a through hole 204 is formed in the middle of the main reflector 202, the reflecting surfaces of the secondary reflector 201 and the main reflector 202 are opposite, and an aperture diaphragm 203 is arranged on the reflecting surface of the main reflector 202;
The incident light sequentially passes through the first lens 101 and the second lens 102 and then is emitted to the primary reflector 202, the light beam is reflected by the primary reflector 202 and reaches the secondary reflector 201, the secondary reflector 201 reflects the light beam to form reflected light, and the reflected light sequentially passes through the third lens 301 and the fourth lens 302 after passing through the through hole 204 of the primary reflector 202.
The incident direction of the incident light is from front to back.
The secondary reflector 201 and the primary reflector 202 are both spherical, which is beneficial to reducing the difficulty and cost of processing and detection.
The first lens 101, the second lens 102, the third lens 301 and the fourth lens 302 are all spherical lenses. The first lens 101 and the second lens 102 constitute a dual-split lens, and the third lens 301 and the second lens 102 constitute a dual-split lens.
The optical system adopts a catadioptric optical system structure type based on a global surface optical element, avoids the problem that a pure transmission type optical system is difficult to correct wide spectrum chromatic aberration, particularly secondary spectrum under the condition of long focal length design, can obtain the design result that the length of the optical system is far less than the focal length, and makes the long focal length optical system possible to be applied to a space flight platform with severe requirements on important and size.
in order to reduce the processing and manufacturing cost of the optical system and obtain a design scheme with high cost performance, the reflector and the lens of the embodiment both adopt spherical surface types, and the manufacturing and detection of all optical elements can be realized by adopting a conventional processing technology.
During operation, a stellar optical signal firstly passes through a double-separation lens consisting of a first lens 101 and a second lens 102, and the propagation direction of light rays is basically unchanged; the optical signal is then collected by the spherical primary mirror 202 and the spherical secondary mirror, which assume the main focal power of the optical system. Since the mirrors are all spherical, a large amount of aberrations such as spherical aberration, coma, and the like are generated, and these aberrations are mainly corrected by the front lens group. When the focal power of the current lens group is close to zero, even if the same glass material is adopted, the generated axial chromatic aberration and vertical-axis chromatic aberration are very small, and the reflector does not generate chromatic aberration, so that the spectral design of an ultra-wide spectral band is realized. The third lens 301 and the fourth lens 302 of the rear lens group form a double-separation lens, so that residual spherical aberration, coma aberration and chromatic aberration are corrected, and image space telecentric optical path design is realized.
The optical system of the invention has compact design, highly folds the light path under the long focal length, avoids the use of large chromatic aberration optical elements, realizes the design of low chromatic aberration and secondary spectrum, obtains the spectrum detection of ultra-wide spectrum band, realizes the light and small size of the optical system and the image quality close to the diffraction limit, improves the collection efficiency of the stellar light signal, and solves the design contradiction of the light and small size and high precision of the optical system.
Further preferably, the angle between the principal ray of the optical system and the optical axis is not more than 0.1 °.
The optical system realizes the image space telecentric light path design and improves the measurement precision of the optical system in a complex application environment.
further preferably, the first lens 101 has an optical power ofThe focal power of the second lens 102 isThe optical system has an optical power ofwhereinAndSatisfies the following conditions:
The combined power of the front lens group of the optical system of the present embodiment is close to zero.
further preferably, the combined focal power of the reflector group isThe optical system has an optical power ofThenAndSatisfies the following conditions:
Further preferably, the power of the rear lens group isThe optical system has an optical power ofthenAndSatisfies the following conditions:
Further preferably, when the total length of the optical system is L, the L is the distance from the front surface of the first lens 101 to the image plane 400, and the total focal length of the optical system is f, the L and f satisfy:
L/f≤0.265。
In a further preferred embodiment, the front surface of the first lens 101 has a radius of curvature of 645.8mm, the rear surface has a radius of curvature of-529.5 mm, the center thickness is 10mm, and the clear aperture of the lens is set to be equal tothe curvature radius of the front surface of the second lens 102 is-298.3 mm, the rear surface is a plane, the center thickness is 6mm, and the clear aperture of the lens isThe radius of curvature of the rear surface of the secondary mirror 201 is-166.8 mm; the radius of curvature of the front surface of the primary mirror 202 is-364.8 mm; the curvature radius of the front surface of the third lens 301 is-102.5 mm, the curvature radius of the rear surface is 35.6mm, and the center thickness is 2.5 mm; the radius of curvature of the front surface of the fourth lens 302 is 36.8mm, the radius of curvature of the rear surface is-102.58 mm, and the center thickness is 14 mm.
In this embodiment, the rear surface of the second lens 102, the front surface of the secondary reflector 201, and the rear surface of the primary reflector 202 are all flat surfaces, and the rear surface of the second lens 102 and the front surface of the secondary reflector 201 are centered and glued together, so as to avoid the need of separately designing a support structure for the secondary reflector 201.
the optical surface of the second lens 102 close to the secondary reflector 201 is the rear surface of the second lens 102, and the rear surface of the secondary reflector 201 is processed into a plane during processing and manufacturing, so that the secondary reflector 201 and the second lens 102 are glued.
In a preferred embodiment, the first lens 101 and the second lens 102 are made of crown glass, the third lens 301 is made of heavy lanthanum flint glass, and the fourth lens 302 is made of flint glass.
the distance between the rear surface of the first lens 101 and the front surface of the second lens 102 is 4 mm; the distance between the rear surface of the second lens 102 and the front surface of the main mirror 202 is 131.2 mm; the distance between the front surface of the main reflector 202 and the rear surface of the secondary reflector 201 is 126.2 mm; the distance from the rear surface of the secondary reflector 201 to the front surface of the third lens 301 is 136.8 mm; the distance from the rear surface of the third lens 301 to the front surface of the fourth lens 302 is 14.1mm, and the distance from the rear surface of the fourth lens 302 to the image plane 400 is 15.6 mm.
The compact long-focus star sensor telecentric optical system in the embodiment achieves the following technical indexes:
Focal length: 800 mm;
Relative pore diameter: f/8;
Visual field: 1.5 degrees;
Spectral range: 450 nm-1100 nm;
The relative distortion is less than or equal to 0.04 percent;
Total length of optical system: l is less than or equal to 207.8 mm.
The ratio of the total length L of the optical system to the focal length f is 0.26.
When the optical system is matched with a cmos detector with the pixel size of 5.5 mu m, the resolution precision of a single pixel reaches 1.38' and is close to the diffraction limit image quality, and the full-field average transfer function MTF is better than 0.35@50 lp/mm.
Referring to fig. 2, fig. 2 represents the optical transfer function curve distribution of the whole optical system in the example of the present invention, and the average optical transfer function value of the optical system reaches more than 0.35 at 50lp/mm, and the imaging quality is excellent.
Referring to FIG. 3, FIG. 3 illustrates an energy concentration profile of an optical system in an example of the invention, except for the edge field of viewThe energy concentration ratio in the range reaches more than 80%, and the stellar optical signals are well gathered.
Referring to fig. 4, fig. 4 represents the relative distortion design result of the optical system in the example of the invention, the distortion is not more than 0.04%, and the measurement error of the star position caused by the distortion is avoided.
the invention realizes the design of the star sensor optical system with the focal length close to the meter, the detection spectral range reaches 650nm, the measurement precision of the star position and the collection of star light energy are improved, and the star detection capability can be improved by more than 1 time under the same detection caliber.
the optical system adopts a global surface optical element, has compact structure, highly folds the light path under long focal length, avoids the use of a large-chromatic-aberration optical element, realizes the design of low chromatic aberration and secondary spectrum while realizing the lightness and the smallness of the optical system, can meet various aircraft platforms with harsh requirements on weight and size in space, solves the design contradiction between lightness and smallness and high precision, obtains the spectrum detection of an ultra-wide spectrum band, realizes the image quality close to the diffraction limit, and improves the collection efficiency of a stellar optical signal.
The optical system is designed for an image space telecentric optical path, improves the measurement precision of the optical system in a complex application environment, and is beneficial to reducing the measurement error of the star sensor optical system in a space complex mechanical vibration and temperature change environment.
the optical system has reasonable focal power distribution, all the lenses and the reflectors are spherical surfaces, the processing, manufacturing and assembling tolerance is loose, the processing difficulty and the assembly and adjustment difficulty are reduced, and the manufacturability and the assembly yield of the long-focus star sensor optical system are favorably improved.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (8)
1. the utility model provides a compact long-focus star sensor telecentric optical system which characterized in that: the optical lens comprises a front lens group, a reflector group, a rear lens group and an image plane which are sequentially arranged from front to back along the incident direction of light, wherein the front lens group comprises a first lens and a second lens which are sequentially arranged from front to back, and the rear lens group comprises a third lens and a fourth lens which are sequentially arranged from front to back; the first lens is a biconvex positive focal power lens, the second lens is a plano-concave negative focal power lens, the third lens is a biconcave negative focal power lens, and the fourth lens is a biconvex positive focal power lens;
The reflecting mirror group comprises a secondary reflecting mirror and a main reflecting mirror which are sequentially arranged from front to back, the secondary reflecting mirror is a convex reflecting mirror, the main reflecting mirror is a concave reflecting mirror, a through hole is formed in the middle of the main reflecting mirror, the reflecting surfaces of the secondary reflecting mirror and the main reflecting mirror are opposite, an aperture diaphragm is arranged on the front surface of the main reflecting mirror, and the secondary reflecting mirror and the main reflecting mirror are spherical;
incident light sequentially passes through the first lens and the second lens and then is emitted to the main reflector, light beams are reflected by the main reflector and then reach the secondary reflector, the secondary reflector reflects the light beams to form reflected light, and the reflected light sequentially passes through the third lens and the fourth lens after passing through the through hole of the main reflector.
2. The compact long-focus star sensor telecentric optical system of claim 1, wherein: the included angle between the chief ray of the optical system and the optical axis is not more than 0.1 degree.
3. The compact long-focus star sensor telecentric optical system of claim 1, wherein: the focal power of the first lens isthe focal power of the second lens isThe optical system has an optical power ofWhereinandSatisfies the following conditions:
4. The compact long-focus star sensor telecentric optical system of claim 1, wherein: the combined focal power of the reflector group isThe optical system has an optical power ofThenAndSatisfies the following conditions:
5. The compact long-focus star sensor telecentric optical system of claim 1, wherein: the focal power of the rear lens group isThe optical systemhas an optical power ofThenAndSatisfies the following conditions:
6. The compact long-focus star sensor telecentric optical system of claim 1, wherein: the total length of the optical system is L, the L is the distance from the front surface of the first lens to the image plane, the total focal length of the optical system is f, and then the L and the f satisfy the following conditions:
L/f≤0.265。
7. the compact long-focus star sensor telecentric optical system of claim 1, wherein: the curvature radius of the front surface of the first lens is 645.8mm, the curvature radius of the rear surface of the first lens is-529.5 mm, the center thickness of the first lens is 10mm, and the clear aperture of the first lens isthe curvature radius of the front surface of the second lens is-298.3 mm, the rear surface of the second lens is a plane, the center thickness of the second lens is 6mm, and the clear aperture of the second lens isthe curvature radius of the secondary reflector is-166.8 mm; the curvature radius of the main reflector is-364.8 mm; the curvature radius of the front surface of the third lens is-102.5 mm, the curvature radius of the rear surface of the third lens is 35.6mm, and the center thickness of the third lens is 2.5 mm; the curvature radius of the front surface of the fourth lens is 36.8mm, and the curvature of the rear surface of the fourth lens isThe radius is-102.58 mm, and the center thickness is 14 mm.
8. the compact long-focus star sensor telecentric optical system of claim 1, wherein: the material of first lens and second lens is crown glass, the material of third lens is heavy lanthanum flint glass, the material of fourth lens is flint glass.
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| CN110927940A (en) * | 2019-12-19 | 2020-03-27 | 浙江舜宇光学有限公司 | Image pickup apparatus |
| CN113759536A (en) * | 2021-09-07 | 2021-12-07 | 中国科学院国家天文台南京天文光学技术研究所 | Large-view-field compact catadioptric telescope optical system with clamping type focus |
| CN114137707A (en) * | 2021-12-03 | 2022-03-04 | 湖北久之洋红外系统股份有限公司 | Compact type long-focus athermalized star sensor optical system |
| CN114488508A (en) * | 2021-12-29 | 2022-05-13 | 中国人民解放军63921部队 | Long-focus large-caliber compact space telescopic imaging system and imaging device |
| CN114754984A (en) * | 2022-05-19 | 2022-07-15 | 中国工程物理研究院应用电子学研究所 | Refraction-reflection type pupil optical axis sensor |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2726574A (en) * | 1950-09-11 | 1955-12-13 | Leitz Ernst Gmbh | Reflecting mirror and lens objective of the cassegrain type |
| DE1010755B (en) * | 1955-01-12 | 1957-06-19 | Zeiss Jena Veb Carl | Mirror lens |
| GB975446A (en) * | 1960-09-24 | 1964-11-18 | Zeiss Stiftung | Mirror objective particularly suitable for photographic purposes |
| GB1092013A (en) * | 1965-04-14 | 1967-11-22 | Optische Ind De Oude Delft Nv | Optical mirror system |
| US3515461A (en) * | 1967-01-30 | 1970-06-02 | Perkin Elmer Corp | Catadioptric objective of the cassegrain type |
| CH559372A5 (en) * | 1974-01-03 | 1975-02-28 | Wiedemann Erwin | Catadioptric system for astrophotography - in direction of movement of light comprises meniscus and corrective lenses |
| GB1388545A (en) * | 1971-06-09 | 1975-03-26 | Rank Organisation Ltd | Catadioptric lenses |
| DE19613009A1 (en) * | 1996-03-25 | 1997-12-11 | Frank Gallert | Catadioptric objective using meniscus collective and dispersing mirrors |
| RU2006110432A (en) * | 2006-03-31 | 2007-10-10 | Казенное предпри тие "Центральное конструкторскоебюро "Арсенал" (UA) | MIRROR LENS LENS |
| RU2007144624A (en) * | 2007-11-22 | 2009-05-27 | Василий Андреевич Сениченков (RU) | LIGHT MIRROR LENS LENS |
| CN203433177U (en) * | 2013-08-30 | 2014-02-12 | 深圳市荣者光电科技发展有限公司 | Super-remote-distance fold back type shimmer night vision large lens |
| CN210465831U (en) * | 2019-09-03 | 2020-05-05 | 佛山科学技术学院 | Compact type long-focal-length star sensor telecentric optical system |
-
2019
- 2019-09-03 CN CN201910826530.4A patent/CN110579859B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2726574A (en) * | 1950-09-11 | 1955-12-13 | Leitz Ernst Gmbh | Reflecting mirror and lens objective of the cassegrain type |
| DE1010755B (en) * | 1955-01-12 | 1957-06-19 | Zeiss Jena Veb Carl | Mirror lens |
| GB975446A (en) * | 1960-09-24 | 1964-11-18 | Zeiss Stiftung | Mirror objective particularly suitable for photographic purposes |
| GB1092013A (en) * | 1965-04-14 | 1967-11-22 | Optische Ind De Oude Delft Nv | Optical mirror system |
| US3515461A (en) * | 1967-01-30 | 1970-06-02 | Perkin Elmer Corp | Catadioptric objective of the cassegrain type |
| GB1388545A (en) * | 1971-06-09 | 1975-03-26 | Rank Organisation Ltd | Catadioptric lenses |
| CH559372A5 (en) * | 1974-01-03 | 1975-02-28 | Wiedemann Erwin | Catadioptric system for astrophotography - in direction of movement of light comprises meniscus and corrective lenses |
| DE19613009A1 (en) * | 1996-03-25 | 1997-12-11 | Frank Gallert | Catadioptric objective using meniscus collective and dispersing mirrors |
| RU2006110432A (en) * | 2006-03-31 | 2007-10-10 | Казенное предпри тие "Центральное конструкторскоебюро "Арсенал" (UA) | MIRROR LENS LENS |
| RU2007144624A (en) * | 2007-11-22 | 2009-05-27 | Василий Андреевич Сениченков (RU) | LIGHT MIRROR LENS LENS |
| CN203433177U (en) * | 2013-08-30 | 2014-02-12 | 深圳市荣者光电科技发展有限公司 | Super-remote-distance fold back type shimmer night vision large lens |
| CN210465831U (en) * | 2019-09-03 | 2020-05-05 | 佛山科学技术学院 | Compact type long-focal-length star sensor telecentric optical system |
Non-Patent Citations (1)
| Title |
|---|
| 李建林;雷广智;白杨;文延;林上民;: "大口径折反式星敏感器光学系统的光路设计", 光子学报, vol. 49, no. 06, 30 June 2020 (2020-06-30), pages 0611002 - 1 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927940A (en) * | 2019-12-19 | 2020-03-27 | 浙江舜宇光学有限公司 | Image pickup apparatus |
| US11914127B2 (en) | 2019-12-19 | 2024-02-27 | Zhejiang Sunny Optics Co., Ltd | Camera apparatus |
| CN113759536A (en) * | 2021-09-07 | 2021-12-07 | 中国科学院国家天文台南京天文光学技术研究所 | Large-view-field compact catadioptric telescope optical system with clamping type focus |
| CN114137707A (en) * | 2021-12-03 | 2022-03-04 | 湖北久之洋红外系统股份有限公司 | Compact type long-focus athermalized star sensor optical system |
| CN114488508A (en) * | 2021-12-29 | 2022-05-13 | 中国人民解放军63921部队 | Long-focus large-caliber compact space telescopic imaging system and imaging device |
| CN114488508B (en) * | 2021-12-29 | 2023-08-15 | 中国人民解放军63921部队 | Long-focal-length large-caliber compact space telescopic imaging system and imaging device |
| CN114754984A (en) * | 2022-05-19 | 2022-07-15 | 中国工程物理研究院应用电子学研究所 | Refraction-reflection type pupil optical axis sensor |
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