CN207636023U - Cube-corner prism retroreflective light spot positioning accuracy detection device - Google Patents
Cube-corner prism retroreflective light spot positioning accuracy detection device Download PDFInfo
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Abstract
In order to solve the problem that current corner cube prism retroreflection facula positioning accuracy detection device precision is lower, the design degree of difficulty is high, the utility model provides a corner cube prism retroreflection facula positioning accuracy detection device that detects the precision height, the design is simple. The utility model discloses at first mark the school in order to reduce the influence of systematic error to detecting the precision to the light path optical axis, then simulate different on-satellite vibration condition through vibration simulation platform, adopt the high-accuracy measurement of facula central point position error as detecting element of four-quadrant detector that the refresh rate is high.
Description
Technical field
The utility model belongs to laser space communication field, is related to a kind of facula position detection device and method, specifically relates to
And a kind of prism of corner cube retroeflection hot spot positioning accuracy detection device.
Background technology
Prism of corner cube is a kind of high-precision retrodirective reflection optics element, because it is with good light beam retroreflection characteristics, and
It is widely used in the laser ranging of cooperative target, laser space communication.Laser space communication is thick, essence tracking light path light axis
Calibration in, corner cube reflector plays very important effect, and the property of retroeflection hot spot determines that in-orbit optic communication satellite is thick
The error in pointing of smart tracking optical axis eventually affects the quality of laser space communication.
In laser space communication, there are many reason of causing prism of corner cube retroeflection hot spot position error, such as high frequency vibrating on star
After error, prism of corner cube synthesis angle error, prism of corner cube caused by dynamic retroeflection light spot energy uneven distribution etc. is caused to diffraction.
The prism of corner cube spot location accuracy detecting device used at present is the autocollimatic based on CCD (Charge-coupled Device)
Straight method.Due to the problems such as CCD pixel responsiveness is uneven, refresh rate is low, cause that accuracy of detection is low, simulated environment in high-frequency vibration
It is lower not applicable.It two hot spots and is compared in addition, autocollimation method needs to obtain, but two hot spots cannot have when due to detection
Overlapping needs to carry out " windowing " processing to ccd detector, increases the design difficulty of device.
Utility model content
In order to solve, existing prism of corner cube retroeflection hot spot positioning accuracy detection device precision is relatively low, design difficulty is high asks
Topic, the utility model provide that a kind of accuracy of detection is high, the simple prism of corner cube retroeflection hot spot positioning accuracy detection device of design.
The technical solution of the utility model is：
Prism of corner cube retroeflection hot spot positioning accuracy detection device, including data acquisition processing system；It is characterized in that：
Further include laser, beam spread collimation optical system, diaphragm and the spectroscope set gradually along same light path；
Laser is connect with beam spread collimation optical system by optical fiber；
Bore of the opening of diaphragm more than or equal to prism of corner cube to be measured；
It is first plane of incidence to define face of the spectroscope towards diaphragm, and another side is second plane of incidence；Enter in spectroscope first
It penetrates on the reflected light path in face, is provided with plane mirror, remittance is disposed on the reflected light path of second plane of incidence of spectroscope
Poly- lens and the 4 quadrant detector being connected with the data acquisition processing system；4 quadrant detector is located at the coke of plus lens
On face；
Vibration simulation platform is used for fixed placement prism of corner cube to be measured and the laser, beam spread collimation optical system, light
Door screen, spectroscope, plus lens and 4 quadrant detector, and vibration environment on the star of simulation is provided；
It is that Y-axis is positive to define diaphragm output light path optical axis direction, and the beam optical axis side of plus lens is incident to from spectroscope
To for Z axis negative sense, X-axis forward direction is determined according to left-handed coordinate system；Any of four pixels by 4 quadrant detector target surface are remembered
It is denoted as B pixels, C pixels and D pixels successively using A pixels as starting point inverse clock serial number for A pixels, 4 quadrant detector is logical
It crosses six degree of freedom and adjusts stage+module on the vibration simulation platform, position and posture should make the A pixels and B pixels
Cut-off rule and X-axis and the angle of Y-axis be 45 °；
Data acquisition processing system acquires the output current value of four pixels of the 4 quadrant detector, using diagonal algorithm
Calculate the retroeflection hot spot positioning accuracy of prism of corner cube to be measured.
Further, the laser, beam spread collimation optical system, diaphragm, spectroscope, prism of corner cube to be measured, convergence are saturating
Mirror and 4 quadrant detector and vibration simulation platform are rigid connection.
The utility model has the advantages that：
In view of the light energy distribution of laser output is Gauss light, the depth of parallelism of input light will influence whether that four-quadrant is visited
The distribution of device target surface light energy is surveyed, therefore laser is connect with beam-expanding collimation system using optical fiber by the utility model, to obtain
More good Gaussian Profile directional light；
Method by being detected after first calibration, eliminates the interference of systematic error, improves accuracy of detection；
It simulates on vibration simulation platform and is vibrated on star, it, can be with using the high 4 quadrant detector of refresh rate (KHz ranks)
Realize the detection of spot location precision under High-precision high-frequency vibration environment；
Using 4 quadrant detector as detecting element, the height of spot center site error is realized in cooperation " diagonal line algorithm "
Precision measure.
Description of the drawings
Fig. 1 is the principle schematic diagram of the utility model prism of corner cube retroeflection hot spot positioning accuracy detection device；
Fig. 2 is the spot location error schematic diagram using " diagonal line algorithm ", and wherein ABCD is respectively 4 quadrant detector
Four pixels, σx、σyBe spot center position respectively X-coordinate and Y coordinate；
101- lasers；102- beam spread collimation optical systems；103- diaphragms；104- spectroscopes；105- plane mirrors；
106- prism of corner cubes to be measured；107- plus lens；108- 4 quadrant detectors；109- six degree of freedoms adjust platform；110- vibrates
Analog platform；111- data acquisition processing systems.
Specific implementation mode
It elaborates to the utility model below in conjunction with the drawings and specific embodiments.
For convenience of description, it is that Y-axis is positive to define 103 output light path optical axis direction of diaphragm, and convergence is incident to from spectroscope 104
The beam optical axis direction of lens 107 is Z axis negative sense, and X-axis forward direction is determined according to left-handed coordinate system.
Referring to Fig. 1, prism of corner cube retroeflection hot spot positioning accuracy detection device provided by the utility model, including along same
Laser 101 that light path is set gradually, beam spread collimation optical system 102, diaphragm 103, spectroscope 104；Vibration simulation platform 110
For simulating vibration environment on star；Laser 101 is connect with beam-expanding collimation transmissive optical system 102 using optical fiber, more excellent to provide
The Gaussian Profile directional light of matter；The opening of diaphragm 103 is more than or equal to the bore of prism of corner cube 106 to be measured, so that hot spot stuffing horn
Otherwise cone prism specular cross section can only obtain prism of corner cube part retroeflection hot spot position error.
It is first plane of incidence to define face of the spectroscope 104 towards diaphragm 103, and the face towards prism of corner cube 106 to be measured is the
Two planes of incidence；On the reflected light path of 104 first plane of incidence of spectroscope, it is provided with plane mirror 105, in spectroscope 104
The four-quadrant for being disposed with plus lens 107 on the reflected light path of two planes of incidence and being connected with data acquisition processing system 111
Detector 108；The target surface of 4 quadrant detector 108 is located at the focal plane of plus lens 107；
Laser 101, beam spread collimation optical system 102, diaphragm 103, spectroscope 104, prism of corner cube to be measured 106, convergence
Lens 107,4 quadrant detector 108
Any of four pixels (i.e. output pin) of 108 target surface of 4 quadrant detector are denoted as A pixels, with A pixels
For starting point inverse clock serial number, it is denoted as B pixels, C pixels and D pixels successively, 4 quadrant detector 108 passes through six degree of freedom tune
It saves platform 109 to be mounted on vibration simulation platform 110, the position of 4 quadrant detector 108 should make point of A pixels and B pixels
Secant and the angle of X-axis, Y-axis are 45 °, and the specific installation position of 4 quadrant detector 108 is as shown in Figure 2.
The detection process of the utility model：
The light beam that laser 101 is sent out is irradiated to after 102 collimator and extender of beam spread collimation optical system on diaphragm 103, is adjusted
103 size of whole diaphragm makes the light beam being emitted from diaphragm 103 cover the effective area of prism of corner cube 106 to be measured；Go out from diaphragm 103
A part of (the present embodiment 1 of laser penetrated:1 beam splitting) after the transmission of spectroscope 104, in vertical incidence to prism of corner cube 106, angle
The light beam backtracking that cone prism 106 reflects is irradiated on spectroscope 104, and remittance is radiated at after the face of spectroscope 104 two is reflected
On poly- lens 107, plus lens 107 converges the directional light of irradiation on it, and obtained convergence hot spot focuses on four-quadrant
It limits on 108 target surface of detector, the output electricity of 108 4 pixels of 4 quadrant detector is acquired using data acquisition processing system 111
Stream calculates displacement of the spot center apart from 4 quadrant detector target center, the i.e. positioning accuracy of retroeflection hot spot.
The detection method that prism of corner cube retroeflection hot spot positioning accuracy is realized using above-mentioned apparatus, is included the following steps：
(1) adjusting plane mirror 105 keeps its reflecting surface parallel with Y-axis；It adjusts six degree of freedom and adjusts platform 109, adjust
In the process, it should ensure that the A pixels of 4 quadrant detector 108 and the cut-off rule of B pixels and the angle of X-axis, Y-axis are 45 ° always,
When the output current of 108 4 pixels of 4 quadrant detector is equal in magnitude, Z-direction light path calibration is completed.
(2) plane mirror 105 is removed or is blocked, prism of corner cube 106 to be measured is placed on vibrations analog platform 110,
Under conditions of being not turned on vibration simulation platform 110 (i.e. under stationary state), prism of corner cube 106 to be measured is adjusted, four-quadrant is made to visit
Survey 108 4 pixel output currents of device are equal in magnitude, complete the calibration of Y-direction light path at this time.
(3) posture of prism of corner cube 106 to be measured is fixed by self-locking device, then uses rigid connector by angle measurement
Cone prism 106 is connect with vibration simulation platform 110.
(4) vibration simulation platform 110 is opened, the Vibration Condition of satellite under varying environment is simulated, records 4 quadrant detector
The output current I of 108 4 pixelsA、IB、IC、IDSize；
(5) it according to the output current value of 108 4 pixels of 4 quadrant detector obtained in step (4), is calculated using diagonal
Method calculates the coordinate σ in X-direction of spot center positionxWith the coordinate σ in Y directiony, calculation formula is：
Wherein, k is photoelectric conversion factors.
(6) the retroeflection hot spot positioning accuracy of prism of corner cube 106 to be measured, that is, spot center is apart from 4 quadrant detector target
The displacement r of the heart is：
Claims (2)
1. prism of corner cube retroeflection hot spot positioning accuracy detection device, including data acquisition processing system (111)；It is characterized in that：
Further include the laser (101) set gradually along same light path, beam spread collimation optical system (102), diaphragm (103) and point
Light microscopic (104)；
Laser (101) is connect with beam spread collimation optical system (102) by optical fiber；
The opening of diaphragm (103) is more than or equal to the bore of prism of corner cube to be measured (106)；
The definition face of spectroscope (104) towards diaphragm (103) is first plane of incidence, and another side is second plane of incidence；In spectroscope
On the reflected light path of (104) first planes of incidence, it is provided with plane mirror (105), in the anti-of (104) second plane of incidence of spectroscope
The Quadrant detector for being disposed with plus lens (107) and being connected with the data acquisition processing system (111) is penetrated in light path
Device (108)；4 quadrant detector (108) is located on the focal plane of plus lens (107)；
Vibration simulation platform (110) is used for fixed placement prism of corner cube to be measured (106) and the laser (101), beam-expanding collimation
Optical system (102), diaphragm (103), spectroscope (104), plus lens (107) and 4 quadrant detector (108), and mould is provided
Vibration environment on quasi- star；
It is that Y-axis is positive to define diaphragm (103) output light path optical axis direction, and plus lens (107) is incident to from spectroscope (104)
Beam optical axis direction is Z axis negative sense, and X-axis forward direction is determined according to left-handed coordinate system；By four of 4 quadrant detector (108) target surface
Any of pixel is denoted as A pixels, using A pixels as starting point inverse clock serial number, is denoted as B pixels, C pixels and D pixels successively,
4 quadrant detector (108) adjusts platform (109) by six degree of freedom and is mounted on the vibration simulation platform (110), position
Setting should so that the cut-off rule of the A pixels and B pixels and the angle of X-axis and Y-axis are 45 ° with posture；
Data acquisition processing system (111) acquires the output current value of (108) four pixels of 4 quadrant detector, is calculated using diagonal
Method calculates the retroeflection hot spot positioning accuracy of prism of corner cube (106) to be measured.
2. prism of corner cube retroeflection hot spot positioning accuracy detection device according to claim 1, it is characterised in that：The laser
Device (101), beam spread collimation optical system (102), diaphragm (103), spectroscope (104), prism of corner cube to be measured (106), convergence are saturating
Mirror (107) and 4 quadrant detector (108) and vibration simulation platform are rigid connection.
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| CN201721772364.7U CN207636023U (en) | 2017-12-18 | 2017-12-18 | Cube-corner prism retroreflective light spot positioning accuracy detection device |
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| CN201721772364.7U CN207636023U (en) | 2017-12-18 | 2017-12-18 | Cube-corner prism retroreflective light spot positioning accuracy detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207587A (en) * | 2019-06-10 | 2019-09-06 | 北京航天计量测试技术研究所 | A kind of prism of corner cube optical apex measuring device and measurement method |
| CN110567377A (en) * | 2019-06-10 | 2019-12-13 | 北京航天计量测试技术研究所 | Pyramid prism length standard rod length measuring device and measuring method thereof |
-
2017
- 2017-12-18 CN CN201721772364.7U patent/CN207636023U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110207587A (en) * | 2019-06-10 | 2019-09-06 | 北京航天计量测试技术研究所 | A kind of prism of corner cube optical apex measuring device and measurement method |
| CN110567377A (en) * | 2019-06-10 | 2019-12-13 | 北京航天计量测试技术研究所 | Pyramid prism length standard rod length measuring device and measuring method thereof |
| CN110567377B (en) * | 2019-06-10 | 2021-08-03 | 北京航天计量测试技术研究所 | Pyramid prism length standard rod length measuring device and measuring method thereof |
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