CN208937798U - A kind of optical system of star sensor that wide spectrum is small-sized - Google Patents
A kind of optical system of star sensor that wide spectrum is small-sized Download PDFInfo
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- CN208937798U CN208937798U CN201821651463.4U CN201821651463U CN208937798U CN 208937798 U CN208937798 U CN 208937798U CN 201821651463 U CN201821651463 U CN 201821651463U CN 208937798 U CN208937798 U CN 208937798U
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- lens
- optical system
- star sensor
- small
- wide spectrum
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Abstract
The utility model discloses a kind of optical system of star sensor that wide spectrum is small-sized, it include: aperture diaphragm, the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and as plane, the aperture diaphragm is located on the first lens；First lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and as plane is arranged successively with optical axis along the direction of light incidence；Fixed star detecting light spectrum width under the identical bore of the utility model optical system is 1.8 times of conventional optical system of star sensor；Under the premise of the detectivity of needs is identical, this optical system bore can be reduced, the weight and size of star sensor complete machine is reduced, is suitably applied in star sensor field.
Description
Technical field
The utility model relates to a kind of optical system, in particular to a kind of star sensor optical system that wide spectrum is small-sized
System.
Background technique
The star sensor fixed star accurately known by detection space position, is identified by the detection of position and angle, is realized
Attitude angle of the spacecraft under space inertial coordinate system.In known attitude measuring, star sensor has
The advantages of detection accuracy is high and attitude accuracy does not drift about at any time, has been widely used.The development trend of star sensor is
Big visual field, small light and high-precision etc..
In research high-performance optical system of star sensor technical aspect, core is to pursue guaranteeing fixed star detection demand (packet
Include image quality, disc of confusion it is symmetrical and it is low distortion etc.) on the basis of, reduce optical system of star sensor to greatest extent
Weight and volume, meet the small light demand of star sensor.
In terms of solving above-mentioned problem, the prior art specifically includes that (1) using non-spherical lens, reduces star sensor light
The number of lenses of system, to reduce the weight and volume of optical system, but therewith bring processing, adjustment cost substantially on
It rises, does not meet economy；(2) fixed star detectivity is improved using object lens of large relative aperture optical system, advantageously reduces optical system
Length, but radial dimension is still larger, and optical system and the weight of star sensor are directly proportional to radial dimension of square
Increase, it is difficult to further decrease the weight and size of optical system.
Utility model content
Technical problem to be solved by the utility model is: reducing star sensor optics while guaranteeing fixed star detection accuracy
System bulk and weight.
The solution that the utility model solves its technical problem is: a kind of star sensor optical system that wide spectrum is small-sized
System, comprising: aperture diaphragm, the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th are thoroughly
Mirror and as plane, the aperture diaphragm is located on the first lens；
First lens, 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 the direction of light incidence with optical axis；
The combination of first lens, the second lens and the third lens is positive light coke, and meets following formula: 1.75 φ≤
φ123≤2.65φ；
The combination of 4th lens, the 5th lens and the 6th lens is negative power, and meets following formula: 3.55 φ≤
|φ456|≤4.25φ；
7th power of lens meets following formula: 1.55 φ≤φ7≤2.25φ；
Wherein φ123For the combination focal power of the first lens, the second lens and the third lens, φ456For the 4th lens, the 5th
The combination focal power of lens and the 6th lens, φ7For the 7th power of lens, φ is optical system overall focal power.
Further, first lens, the third lens and the 5th power of lens are positive, second lens,
Four lens and the 6th power of lens are negative, and the 7th power of lens is positive.
Further, the material of first lens is quartz, and the material of second lens is lanthanum flint glass or special type
Flint glass, the materials of the third lens are lanthanum crown glass or heavy-lanthanide flint glass, and the material of the 4th lens is attached most importance to fire
The material of stone glass, the 5th lens and the 7th lens is attached most importance to lanthanum flint glass, and the material of the 6th lens is dense flint
Glass.
Further, first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and
Seven lens are spherical lens.
Further, the Entry pupil diameters φ 12.85mm of the optical system.
Fixed star detecting light spectrum width under the identical bore of the utility model optical system is conventional optical system of star sensor
1.8 times；Under the premise of the detectivity of needs is identical, this optical system bore can be reduced, reduces star sensor complete machine
Weight and size.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described.Obviously, described attached drawing is a part of the embodiment of the utility model, rather than complete
Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it
His design scheme and attached drawing.
Fig. 1 is the composed structure schematic diagram of the utility model；
Fig. 2 is the point range curve graph of the utility model light；
Fig. 3 is the utility model optical transfer function curve graph；
Fig. 4 is the utility model relative distortion curve graph.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation
Clear, complete description, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field
Art personnel other embodiments obtained without creative efforts belong to the model of the utility model protection
It encloses.In addition, all connection relationships being previously mentioned in text, not singly refer to that component directly connects, and referring to can be according to specific implementation feelings
Condition, by adding or reducing connection auxiliary, Lai Zucheng more preferably connection structure.Each technology in the utility model creation is special
Sign, can be with combination of interactions under the premise of not conflicting conflict.
Embodiment 1, referring to Fig.1, a kind of optical system of star sensor that wide spectrum is small-sized, comprising: aperture diaphragm 9,
One 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 and as plane 8,
The aperture diaphragm 9 is located on the first lens 1；
First lens 1, the second lens 2, the third lens 3, the 4th lens 4, the 5th lens 5, the 6th lens the 6, the 7th
Lens 7 and as plane 8 is arranged successively with optical axis along the direction of light incidence；
The combination of first lens 1, the second lens 2 and the third lens 3 is positive light coke, and meets following formula: 1.75
φ≤φ123≤2.65φ；
The combination of 4th lens 4, the 5th lens 5 and the 6th lens 6 is negative power, and meets following formula: 3.55
φ≤|φ456|≤4.25φ；
The focal power of 7th lens 7 meets following formula: 1.55 φ≤φ7≤2.25φ；
Wherein φ123For the combination focal power of the first lens 1, the second lens 2 and the third lens 3, φ456For the 4th lens 4,
The combination focal power of 5th lens 5 and the 6th lens 6, φ7For the focal power of the 7th lens 7, φ is optical system overall light focus
Degree.
When utility model works, fixed star point target optical signal passes through the first lens 1 that aperture diaphragm 9 limits, and first thoroughly
Mirror 1, the second lens 2 using the third lens 3 form three separation the first lens group as positive lens groups, light is assembled, mainly
Certain astigmatic correction is realized in spherical aberration corrector, coma and axial chromatic aberration, the second lens 2 two faces adjacent with the third lens 3
Ability；Second lens group of three separation of the 4th lens 4, the 5th lens 5 and the 6th lens 6 composition is negative lens group, main school
Positive astigmatism, distortion etc.；The focal power of 7th lens 7 is negative, and corrects remaining distortion, and mainly force down chief ray, real
The optical path of phenomenon side's telecentricity.Seven lens correct the curvature of field by the reasonable distribution of focal power.The mistake of system architecture symmetrically changes
It corrects since imageable target is located at the vertical axial aberration of infinity introducing.The fixed star point target optical signal of different visual fields passes through seven
The transmission of lens is imaged onto as plane 8 in a manner of image space telecentricity, and the angle of chief ray and optical axis is no more than 0.5 °, is avoided
Detector as plane 8 by mechanics vibrate or temperature change caused by centroid position caused by change in location drift about, ensure that it is high at
As precision.
Conventional optical system of star sensor operating spectrum band is generally 300nm, obtains data by experiment, the utility model
Optical system detecting light spectrum width reaches 550nm, improves 1.8 times.It is equal in the case where Entry pupil diameters φ 12.85mm detects bore
The conventional optical system of star sensor detectivity of Entry pupil diameters φ 17.24mm.Under conditions of optical system length is equivalent, light
The volume of system reduces 43.8%.Optical system bore is reduced under the premise of guaranteeing detectivity, is also beneficial to star sensitivity
The spuious Xanthophyll cycle of device complete machine further decreases the weight and size of star sensor complete machine.
The utility model optical system has preferable color difference and second order spectrum calibration capability, and detection stellar spectrum detects model
Enclose width, the response curve of tie detector, fixed star detectivity improves 1.8 than conventional optical system of star sensor under identical bore
Times or more, meet optical system of star sensor small light demand.
The operating spectral range of the utility model optical system is 400nm~950nm, and detection spectral coverage bandwidth is 550nm, is
Unite focal length 36mm, and 25 ° of full filed, Entry pupil diameters φ 12.85mm.
As optimization, the focal power of first lens 1, the third lens 3 and the 5th lens 5 is positive, and described second thoroughly
The focal power of mirror 2, the 4th lens 4 and the 6th lens 6 is negative, and the focal power of the 7th lens 7 is positive.
First lens 1, the second lens 2 and the third lens 3 are distributed using positive and negative, positive focal power, lens strength structure
Combination preferably, is assembled light, main spherical aberration corrector, coma and axial chromatic aberration realize preferable astigmatic correction ability.
As optimization, the materials of first lens 1 is quartz, the material of second lens 2 be lanthanum flint glass or
Extraordinary flint glass, the material of the third lens 3 are lanthanum crown glass or heavy-lanthanide flint glass, the material of the 4th lens 4
For dense flint glass, the material of the 5th lens 5 and the 7th lens 7 is attached most importance to lanthanum flint glass, the material of the 6th lens 6
For dense flint glass.
The utility model optical system aperture diaphragm 9 is located on the first lens, and the material of the first lens is quartz material,
Both there is aberration correcting capability, while also having the effect of anti-irradiation, save quartz window, be conducive to star sensor optical system
The volume and weight of system reduces.The utility model optical system may also adapt to whole response spectrums of detector, saves and cuts
Only optical filter further reduced the cost and weight of optical system of star sensor.
In order to enable optical system obtains excellent image quality and mass center stability in working range, in optical system
System avoids being conducive to correcting chromatic aberration and second order spectrum, but the specific glass material of temperature performance difference using H-FK61, CaF2 etc., being adopted
Matched design is carried out with different temperatures insensitivity glass material, can satisfy star sensor within the scope of -40 DEG C~+60 DEG C
High-precision detection demand.
As optimization, the Entry pupil diameters φ 12.85mm of the optical system.
Blocking element is set before the utility model optical system, so that Entry pupil diameters reach φ 12.85mm.
As optimization, first lens 1, the second lens 2, the third lens 3, the 4th lens 4, the 5th lens the 5, the 6th are thoroughly
Mirror 6 and the 7th lens 7 are spherical lens.
All lens of the utility model are spherical lens, reduce difficulty of processing and resetting difficulty, it is quick to be conducive to star
The manufacturability and assembly yield of sensor optical system.
The parameter for each lens that the present embodiment uses is as shown in table 1.Wherein, mirror surface S1 is front, and mirror surface S2 is reverse side,
When light incidence, the mirror surface S1 of lens, then the S2 for passing through lens are first passed through.
Table 1: the parameter of each lens
With reference to Fig. 2, Fig. 2 is the asterism of different visual fields in the convergence situation as plane 8, and ordinate is disc of confusion position, horizontal
Coordinate is disperse shape of spot.Each visual field stigma symmetrical shape distribution, disperse spot size are approximately circle, meet star sensor progress
The hot spot distributed needs of sub-pixed mapping mass center subdivision.
With reference to Fig. 3, Fig. 3 is the sagitta of arc and meridian amplitude transfer function curve in different visual fields, characterizes different frequency point
The decline situation of the function of cloth contrast after optical system.In 60lp/mm, the amplitude transfer function value of each visual field is big
In 0.5, the image quality of the utility model optical system meets design requirement.
With reference to Fig. 4, the longitudinal axis is visual field, and horizontal axis is relative distortion value, and the relative distortion of full filed is less than 0.01%, less than 1 μ
M illustrates that distortion correction result is good.
The better embodiment of the utility model is illustrated above, but the utility model creation is not limited to
The embodiment, those skilled in the art can also make various etc. without departing from the spirit of the present invention
Same variation or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (5)
1. a kind of optical system of star sensor that wide spectrum is small-sized, it is characterised in that: include: aperture diaphragm, the first lens,
Two lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and as plane, the aperture diaphragm is located at
On first lens；
First lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and as flat
Face is arranged successively along the direction of light incidence with optical axis；
The combination of first lens, the second lens and the third lens is positive light coke, and meets following formula: 1.75 φ≤φ123
≤2.65φ；
The combination of 4th lens, the 5th lens and the 6th lens is negative power, and meets following formula: 3.55 φ≤|
φ456|≤4.25φ；
7th power of lens meets following formula: 1.55 φ≤φ7≤2.25φ；
Wherein φ123For the combination focal power of the first lens, the second lens and the third lens, φ456For the 4th lens, the 5th lens
With the combination focal power of the 6th lens, φ7For the 7th power of lens, φ is optical system overall focal power.
2. a kind of small-sized optical system of star sensor of wide spectrum according to claim 1, it is characterised in that: described
One lens, the third lens and the 5th power of lens are positive, the light focus of second lens, the 4th lens and the 6th lens
Degree is negative, and the 7th power of lens is positive.
3. a kind of small-sized optical system of star sensor of wide spectrum according to claim 2, it is characterised in that: described
The material of one lens is quartz, and the material of second lens is lanthanum flint glass or extraordinary flint glass, the third lens
Material be lanthanum crown glass or heavy-lanthanide flint glass, the materials of the 4th lens is dense flint glass, the 5th lens and
The material of 7th lens is attached most importance to lanthanum flint glass, and the material of the 6th lens is dense flint glass.
4. a kind of small-sized optical system of star sensor of wide spectrum according to claim 3, it is characterised in that: described
One lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens are spherical lens.
5. a kind of small-sized optical system of star sensor of wide spectrum according to claim 1, it is characterised in that: the light
The Entry pupil diameters φ 12.85mm of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821651463.4U CN208937798U (en) | 2018-10-11 | 2018-10-11 | A kind of optical system of star sensor that wide spectrum is small-sized |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821651463.4U CN208937798U (en) | 2018-10-11 | 2018-10-11 | A kind of optical system of star sensor that wide spectrum is small-sized |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208937798U true CN208937798U (en) | 2019-06-04 |
Family
ID=66724234
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821651463.4U Expired - Fee Related CN208937798U (en) | 2018-10-11 | 2018-10-11 | A kind of optical system of star sensor that wide spectrum is small-sized |
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| Country | Link |
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| CN (1) | CN208937798U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254383A (en) * | 2018-10-11 | 2019-01-22 | 佛山科学技术学院 | A kind of optical system of star sensor that wide spectrum is small-sized |
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2018
- 2018-10-11 CN CN201821651463.4U patent/CN208937798U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254383A (en) * | 2018-10-11 | 2019-01-22 | 佛山科学技术学院 | A kind of optical system of star sensor that wide spectrum is small-sized |
| CN109254383B (en) * | 2018-10-11 | 2023-11-28 | 佛山科学技术学院 | Wide-spectrum light and small star sensor optical system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190604 Termination date: 20201011 |