CN109254384A - A kind of star sensor miniaturized optical system - Google Patents
A kind of star sensor miniaturized optical system Download PDFInfo
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- CN109254384A CN109254384A CN201811184894.9A CN201811184894A CN109254384A CN 109254384 A CN109254384 A CN 109254384A CN 201811184894 A CN201811184894 A CN 201811184894A CN 109254384 A CN109254384 A CN 109254384A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 57
- 239000000463 material Substances 0.000 claims description 21
- 210000001747 pupil Anatomy 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 19
- 238000001228 spectrum Methods 0.000 abstract description 11
- 238000009826 distribution Methods 0.000 description 7
- 230000003595 spectral effect Effects 0.000 description 6
- 238000005457 optimization Methods 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- 235000019892 Stellar Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- 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
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- Optics & Photonics (AREA)
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Abstract
The invention discloses a kind of star sensor miniaturized optical systems, including aperture diaphragm, lens group and as plane, the lens group includes: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, first lens, the second lens, the third lens, the 6th lens and the 7th power of lens are positive, 4th lens and the 5th power of lens are negative, and the aperture diaphragm is between the first lens and the second lens；First lens, aperture diaphragm, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and as plane is arranged successively along entering light incident direction；Optical system of the present invention has preferable color difference and second order spectrum calibration capability, realizes the detection of wide spectrum fixed star, only with seven lens, meets optical system of star sensor small light demand.
Description
Technical field
The present invention relates to a kind of optical system, in particular to a kind of star sensor miniaturized optical system.
Background technique
In known inertial navigation set, measuring instrument of the star sensor as one of measurement accuracy highest, and due to
Detected object is position and the fixed star point target that spatial distribution determines, measurement accuracy is not drifted about at any time, in all kinds of aviations
It is widely applied in aerospace craft.Core apparatus of the optical system of star sensor as star sensor, is star sensor
Realize the critical component of high s/n ratio stellar spectrum collection of energy, the detection of high-precision fixed star centroid position.Compared with photographic lens,
Optical system of star sensor institute detected object is the fixed star that energy is weak, spatial distribution is wide, belongs to point target detection.Simultaneously for reality
Existing sub-pixel subdivision improves star place measurement accuracy, needs starlight energy dispersion to 2 × 2 pixel~5 × 5 pixels, for
Subsequent electronic is finely divided processing, reaches the mass center measurement precision of sub-pixed mapping.According to the demand of star sensor, star sensor light
System should have the characteristics that high dynamic range, big visual field, low distortion and small light, and effectively can inhibit or avoid
False point target except fixed star occurs.
Since fixed star is continuous spectrum distribution, previous optical system of star sensor is designed as realizing object lens of large relative aperture, big view
The performance of field and low distortion, it is larger that aberration controls difficulty.If it is too wide to detect spectral coverage, the color difference and second order spectrum generated therewith
It is difficult to correct, is not easy the image quality obtained, wide spectrum detection can be referred to as by commonly reaching 300nm bandwidth.
Become the noise signal of image quality decline in order to avoid the optical signal outside detection spectral coverage is incident on detector target surface, star is quick
Sensor optical system needs that a thin parallel flat optical filter is added between optical system and detector, plates long wave or short
Wave cut film inhibits the veiling glare outside detection spectral coverage.There are probelem in two aspects for which:
(1) optical filter, which is separately provided, will increase the complexity of optical system of star sensor, and the quantity of optical element increases, leads
It causes manufacturing cost to increase, is unfavorable for the miniaturization of optical system；
(2) parallel flat optical filter be coated with cut film plane it is higher in the residual reflectance of detecting band, between plane
Residual reflection be easy to generate ghost image in detector target surface, reduce the performance of system, increase star sensor fixed star recognition failures
Risk.
Summary of the invention
Present invention solves the technical problem that: the detection spectral coverage of optical system of star sensor is wide, the color difference and secondary light of generation
Spectrum is difficult to correct, and is not easy the image quality obtained, and optical system structure is complicated, is unfavorable for minimizing.
The solution that the present invention solves its technical problem is: a kind of star sensor miniaturized optical system, including aperture
Diaphragm, lens group and as plane, the lens group include: the first lens, the second lens, the third lens, the 4th lens, the 5th thoroughly
Mirror, the 6th lens, the 7th lens, first lens, the second lens, the third lens, the 6th lens and the 7th lens light
Focal power is positive, and the 4th lens and the 5th power of lens are negative, and the aperture diaphragm is located at the first lens and
Between two lens；First lens, aperture diaphragm, the second lens, the third lens, the 4th lens, the 5th lens, the 6th are thoroughly
Mirror, the 7th lens and as plane is coaxially arranged successively along entering light incident direction；
The front surface radius of curvature of first lens is 65.417mm, and rear surface is plane, center thickness 5.0mm,
Lens clear aperture is φ 30.0mm；
The front surface radius of curvature of second lens is 25.172mm, and rear surface radius of curvature is 121.072mm, center
With a thickness of 6.175mm, lens clear aperture is φ 28.6mm；
The front surface radius of curvature of the third lens is 22.839mm, and rear surface radius of curvature is 41.958mm, center
With a thickness of 5.0mm, lens clear aperture is φ 24.9mm；
The front surface radius of curvature of 4th lens is 443.583mm, and rear surface radius of curvature is 15.025mm, center
With a thickness of 5.0mm, lens clear aperture is φ 22.2mm；
The front surface radius of curvature of 5th lens is 36.048mm, and rear surface radius of curvature is 19.460mm, center
With a thickness of 1.6mm, lens clear aperture is φ 18.8mm；
The front surface radius of curvature of 6th lens is 26.010mm, and rear surface radius of curvature is -50.059mm, center
With a thickness of 6.951mm, lens clear aperture is φ 22.4mm；
The front surface radius of curvature of 7th lens is 18.746mm, and rear surface radius of curvature is 17.041mm, center
With a thickness of 5mm, lens clear aperture is φ 22.1mm.
Further, the material of first lens is quartz, and the rear surface of first lens is coated with cut film.
Further, the entrance pupil bore of the optical system is φ 25.0mm.
Further, the material of second lens is H-FK61, and the materials of the third lens is H-LAF53, described the
The material of four lens is H-ZF52, and the material of the 5th lens is H-ZF7LA, the material of the 6th lens and the 7th lens
It is H-ZLAF55A.
Further, first lens are 1.0mm at a distance from the aperture diaphragm；The aperture diaphragm and described second
The distance of lens is 0.1mm；Second lens are 4.94mm at a distance from the third lens；The third lens with it is described
The distance of 4th lens is 2.03mm；4th lens are 2.94mm at a distance from the 5th lens；5th lens
With at a distance from the 6th lens be 4.35mm；6th lens are 0.1mm at a distance from the 7th lens；Described 7th
Lens are with described as being 8.0mm at a distance from plane.
Further, the angle of the chief ray and optical axis of the optical system is less than or equal to 4.8 °.
The beneficial effects of the present invention are: optical system of the present invention has preferable color difference and second order spectrum calibration capability, it is real
Existing wide spectrum fixed star detection, only with seven lens, meets optical system of star sensor small light demand.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described.Obviously, described attached drawing is a part of the embodiments of the present invention, rather than is all implemented
Example, those skilled in the art without creative efforts, can also be obtained according to these attached drawings other designs
Scheme and attached drawing.
Fig. 1 is composed structure schematic diagram of the invention；
Fig. 2 is the point range curve graph of optical system of the present invention；
Fig. 3 is the encircled energy curve graph of optical system of the present invention.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to design of the invention, specific structure and generation clear
Chu, complete description, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair
Bright a part of the embodiment, rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art are not being paid
Other embodiments obtained, belong to the scope of protection of the invention under the premise of creative work.In addition, be previously mentioned in text
All connection relationships not singly refer to that component directly connects, and referring to can be according to specific implementation situation, by adding or reducing connection
Auxiliary, to form more preferably connection structure.Each technical characteristic in the invention, under the premise of not conflicting conflict
It can be with combination of interactions.
Embodiment 1, referring to Fig.1, a kind of star sensor miniaturized optical system, including aperture diaphragm 9, lens group and as flat
Face 8, the lens group include: the first lens 1, the second lens 2, the third lens 3, the 4th lens 4, the 5th lens 5, the 6th lens
6, the 7th lens 7, first lens 1, the second lens 2, the third lens 3, the focal power of the 6th lens 6 and the 7th lens 7
It is positive, the focal power of the 4th lens 4 and the 5th lens 5 is negative, and the aperture diaphragm 9 is located at the first lens 1 and
Between two lens 2；First lens 1, aperture diaphragm 9, the second lens 2, the third lens 3, the 4th lens 4, the 5th lens 5,
6th lens 6, the 7th lens 7 and as plane 8 is coaxially arranged successively along entering light incident direction；
The front surface radius of curvature of first lens 1 is 65.417mm, and rear surface is plane, center thickness 5.0mm,
Lens clear aperture is φ 30.0mm；
The front surface radius of curvature of second lens 2 is 25.172mm, and rear surface radius of curvature is 121.072mm, in
For the heart with a thickness of 6.175mm, lens clear aperture is φ 28.6mm；
The front surface radius of curvature of the third lens 3 is 22.839mm, and rear surface radius of curvature is 41.958mm, center
With a thickness of 5.0mm, lens clear aperture is φ 24.9mm；
The front surface radius of curvature of 4th lens 4 is 443.583mm, and rear surface radius of curvature is 15.025mm, in
For the heart with a thickness of 5.0mm, lens clear aperture is φ 22.2mm；
The front surface radius of curvature of 5th lens 5 is 36.048mm, and rear surface radius of curvature is 19.460mm, center
With a thickness of 1.6mm, lens clear aperture is φ 18.8mm；
The front surface radius of curvature of 6th lens 6 is 26.010mm, and rear surface radius of curvature is -50.059mm, in
For the heart with a thickness of 6.951mm, lens clear aperture is φ 22.4mm；
The front surface radius of curvature of 7th lens 7 is 18.746mm, and rear surface radius of curvature is 17.041mm, center
With a thickness of 5mm, lens clear aperture is φ 22.1mm.
When the invention works, light writes system into light by aperture diaphragm 9, and the first lens 1 carry out light appropriate
It assembles, the second lens 2 further assemble light with the third lens 3, and third lens and the 4th lens 4 correct ball together
Difference, coma, astigmatism and color difference etc.；5th lens 5, the 6th lens 6 play correcting distorted effect, and the 7th lens 7 correct field
Song, and the optical path close to image space telecentricity is obtained, convergence of rays is described as plane 8 is imaged.
Aperture diaphragm 9 of the invention effectively reduces each member of optical system between the first lens 1 and the second lens 2
The size of part is conducive to optical system miniaturization.All lens are spherical lens, reduce difficulty of processing and adjustment is difficult
Degree is conducive to the manufacturability and assembly yield of optical system of star sensor.
Optical system of the present invention has preferable color difference and second order spectrum calibration capability, realizes the detection of wide spectrum fixed star, only
Using seven lens, optical system of star sensor small light demand is met.
As optimization, the material of first lens 1 is quartz, and the rear surface of first lens 1 is coated with cut film.
First lens, 1 rear surface is coated with the cut film of shortwave 350nm~550nm, will be in the response wave of 350nm~550nm
Duan Jinhang cut-off.
The material of first lens 1 is the quartz material of radiation protection, anti-Energetic particle irradiation can have both been played, after protection
The performances such as face lens transmitance will detect the light outside spectral coverage in the cut film that prolonged space radiation declines, while being coated with
Signal cut-off eliminates the optical filtering between existing optical system and detector the case where guaranteeing the image quality of optical system
Piece, the ghost image in spot distribution for avoiding the residual reflection between plane from generating.
As optimization, the entrance pupil bore of the optical system is φ 25.0mm.
One blocking element is set before optical system, makes entrance pupil bore φ 25.0mm.
As optimization, the material of second lens 2 is H-FK61, and the material of the third lens 3 is H-LAF53, institute
The material for stating the 4th lens 4 is H-ZF52, and the material of the 5th lens 5 is H-ZF7LA, and the 6th lens 6 and the 7th are saturating
The material of mirror 7 is H-ZLAF55A.
This optical system does not use H-FK61, and the poor specific glass material of the hot propertys such as CaF2 has good sky
Between adaptability, within the scope of -40 DEG C~+60 DEG C defocusing amount be no more than 0.02mm, full filed centroid position variation be no more than 2.5
μm, meet the high-precision detection demand of star sensor.
As optimization, first lens 1 are 1.0mm at a distance from the aperture diaphragm 9；The aperture diaphragm 9 and institute
The distance for stating the second lens 2 is 0.1mm；Second lens 2 are 4.94mm at a distance from the third lens 3；The third
Lens 3 are 2.03mm at a distance from the 4th lens 4；4th lens 4 are at a distance from the 5th lens 5
2.94mm；5th lens 5 are 4.35mm at a distance from the 6th lens 6；6th lens 6 and the 7th lens
7 distance is 0.1mm；7th lens 7 are with described as being 8.0mm at a distance from plane 8.
As optimization, the chief ray of the optical system and the angle of optical axis are less than or equal to 4.8 °.
Light by optical system pupil center is chief ray.
The operating spectral range of this optical system be 550nm~950nm, system focal length 40mm, 23 ° of full filed, phase
It is F/1.6 to aperture, the angle of chief ray and optical axis is no more than 4.8 °.
Reference Fig. 2, Fig. 2 reflect the asterism of different visual fields in the convergence situation as plane 8, and ordinate is disc of confusion position
It sets, abscissa is disperse shape of spot.Each visual field stigma symmetrical shape distribution, disperse spot size are approximately circle, meet star sensitivity
The hot spot distributed needs of device progress sub-pixed mapping mass center subdivision.
The encircled energy distribution of optical system of star sensor is reflected referring to Fig. 3, Fig. 3, abscissa is diameter, ordinate
It is the percentage of light spot energy accounting under corresponding diameter dimension, includes 0 ° of detection viewing field in figure, 4.2 ° of detection viewing field, detect
7 ° of visual field, 9 ° of detection viewing field, the encircled energy distribution of 11.5 ° of detection viewing field equal 5 visual fields is concentrated in 30 μm of self-energys of φ
Degree is more than 85% energy, meets application demand.Wherein lines 10 represent 0 ° of detection viewing field in Fig. 3, and lines 11 represent detection view
4.2 ° of field, lines 12 represent 7 ° of detection viewing field, and lines 13 represent 9 ° of detection viewing field, and lines 14 represent 11.5 ° of detection viewing field.
Better embodiment of the invention is illustrated above, but the invention is not limited to the implementation
Example, those skilled in the art can also make various equivalent modifications on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (6)
1. a kind of star sensor miniaturized optical system, including aperture diaphragm, lens group and as plane, it is characterised in that: it is described
Lens group includes: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, institute
It states the first lens, the second lens, the third lens, the 6th lens and the 7th power of lens to be positive, the 4th lens
It is negative with the 5th power of lens, the aperture diaphragm is between the first lens and the second lens；First lens,
Aperture diaphragm, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and as plane along
Entering light incident direction is coaxially arranged successively；
The front surface radius of curvature of first lens is 65.417mm, and rear surface is plane, center thickness 5.0mm, lens
Clear aperture is φ 30.0mm；
The front surface radius of curvature of second lens is 25.172mm, and rear surface radius of curvature is 121.072mm, center thickness
For 6.175mm, lens clear aperture is φ 28.6mm；
The front surface radius of curvature of the third lens is 22.839mm, and rear surface radius of curvature is 41.958mm, center thickness
For 5.0mm, lens clear aperture is φ 24.9mm；
The front surface radius of curvature of 4th lens is 443.583mm, and rear surface radius of curvature is 15.025mm, center thickness
For 5.0mm, lens clear aperture is φ 22.2mm；
The front surface radius of curvature of 5th lens is 36.048mm, and rear surface radius of curvature is 19.460mm, center thickness
For 1.6mm, lens clear aperture is φ 18.8mm；
The front surface radius of curvature of 6th lens is 26.010mm, and rear surface radius of curvature is -50.059mm, center thickness
For 6.951mm, lens clear aperture is φ 22.4mm；
The front surface radius of curvature of 7th lens is 18.746mm, and rear surface radius of curvature is 17.041mm, center thickness
For 5mm, lens clear aperture is φ 22.1mm.
2. a kind of star sensor miniaturized optical system according to claim 1, it is characterised in that: first lens
Material is quartz, and the rear surface of first lens is coated with cut film.
3. a kind of star sensor miniaturized optical system according to claim 1, it is characterised in that: the optical system
Entrance pupil bore is φ 25.0mm.
4. a kind of star sensor miniaturized optical system according to claim 1, it is characterised in that: second lens
Material is H-FK61, and the materials of the third lens is H-LAF53, and the material of the 4th lens is H-ZF52, the described 5th
The material of lens is H-ZF7LA, and the material of the 6th lens and the 7th lens is H-ZLAF55A.
5. a kind of star sensor miniaturized optical system according to claim 4, it is characterised in that: first lens with
The distance of the aperture diaphragm is 1.0mm；The aperture diaphragm is 0.1mm at a distance from second lens；Described second thoroughly
Mirror is 4.94mm at a distance from the third lens；The third lens are 2.03mm at a distance from the 4th lens；It is described
4th lens are 2.94mm at a distance from the 5th lens；5th lens are at a distance from the 6th lens
4.35mm；6th lens are 0.1mm at a distance from the 7th lens；7th lens with it is described as plane at a distance from
For 8.0mm.
6. a kind of star sensor miniaturized optical system according to claim 1, it is characterised in that: the optical system
The angle of chief ray and optical axis is less than or equal to 4.8 °.
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| CN201811184894.9A CN109254384B (en) | 2018-10-11 | 2018-10-11 | Star sensor miniaturized optical system |
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|---|---|---|---|
| CN201811184894.9A CN109254384B (en) | 2018-10-11 | 2018-10-11 | Star sensor miniaturized optical system |
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| CN109254384A true CN109254384A (en) | 2019-01-22 |
| CN109254384B CN109254384B (en) | 2023-11-28 |
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| CN110018564A (en) * | 2019-03-12 | 2019-07-16 | 北京威睛光学技术有限公司 | A kind of optical imaging system of the big field depth extending in wavefront coded space |
| CN110441892A (en) * | 2019-08-02 | 2019-11-12 | 佛山科学技术学院 | A kind of low distortion miniaturization high-resolution FISH EYE LENS OPTICS system |
| CN111830687A (en) * | 2020-07-21 | 2020-10-27 | 中国科学院西安光学精密机械研究所 | Transmission-type optical system suitable for wide area detection of space debris |
| CN113219639A (en) * | 2021-05-24 | 2021-08-06 | 深圳市视清科技有限公司 | Optical lens and image pickup apparatus |
| TWI771996B (en) * | 2021-04-23 | 2022-07-21 | 揚明光學股份有限公司 | Fixed-focus lens |
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| CN110441892B (en) * | 2019-08-02 | 2024-02-13 | 佛山科学技术学院 | Low-distortion miniaturized high-resolution fisheye lens optical system |
| CN111830687A (en) * | 2020-07-21 | 2020-10-27 | 中国科学院西安光学精密机械研究所 | Transmission-type optical system suitable for wide area detection of space debris |
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| CN113219639A (en) * | 2021-05-24 | 2021-08-06 | 深圳市视清科技有限公司 | Optical lens and image pickup apparatus |
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