CN108563031B - Collimation light source for monitoring included angle of space camera - Google Patents
Collimation light source for monitoring included angle of space camera Download PDFInfo
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- CN108563031B CN108563031B CN201810072857.2A CN201810072857A CN108563031B CN 108563031 B CN108563031 B CN 108563031B CN 201810072857 A CN201810072857 A CN 201810072857A CN 108563031 B CN108563031 B CN 108563031B
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- 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
- G02B27/30—Collimators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
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- Radar, Positioning & Navigation (AREA)
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- Semiconductor Lasers (AREA)
Abstract
A collimation light source for monitoring the included angle of space camera is composed of LD laser diode assembly, convergent lens assembly, adaptive frame and collimation assembly. The LD laser diode provides a divergent light source, the convergent lens component converges divergent light, and the collimation component completes collimation of laser beams. The invention adopts the low-expansion invar steel material and the zero-expansion glass ceramics as the main supporting structure of the optical system, thereby improving the adaptability of the collimated laser light source to the external thermal environment. The invention has the characteristics of low power consumption, small volume, high stability and the like, and can be used as a measurement light source for monitoring high-precision included angles between space optical remote sensing cameras.
Description
Technical Field
The invention belongs to the technical field of space optical remote sensors, and relates to a collimated light source for monitoring an included angle of a space camera.
Background
The aerospace mapping is an important direction in the field of aerospace optical remote sensing, and in order to meet the requirement of mapping without control points, a high-resolution mapping camera and a high-precision star camera are necessary load configuration. However, under the influence of a ground gravity environment and an in-orbit thermal environment, an included angle between the high-precision star camera and the high-resolution mapping camera has systematic periodic variation, so that a large system error is inevitably brought in the process of transferring the attitude of the star camera to the high-resolution mapping camera, and even if ground calibration is carried out, the star camera still has a large residual error. In order to solve the problem of monitoring the included angle between the star camera and the high-resolution camera, it is necessary to directly establish the association between the star camera and the high-resolution camera on the optical level.
At present, a collimated light source is mainly applied to the fields of projectors, liquid crystal displays, laser pens, large-aperture optical detection and the like, no reference light source specially used for the aerospace in-orbit environment exists, and the research on light sources capable of being used for camera included angle monitoring becomes very important and urgent considering that the precision of reference transmission reaches the sub-second level.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, the collimation light source for monitoring the included angle of the space camera is provided, the collimation light source can be applied to the association between the optical axes of various space cameras, and the attitude determination precision of the space optical remote sensing camera is improved.
The technical scheme of the invention is as follows: a collimation light source for monitoring the included angle of a space camera comprises an LD laser diode component, a converging lens component, an adapting frame and a collimation component; the diode component is connected with the converging lens component, the converging lens component is connected with the adapting frame, and the adapting frame is connected with the collimation component; the LD laser diode component emits divergent laser beams with oval far-field spots, the convergent lens component receives the divergent laser beams for convergence and then emits the divergent laser beams to the collimation component, and the collimation component performs aperture limitation to form fine beam laser and then performs collimation to form collimated beams.
The LD laser diode component comprises an LD laser diode, a diode sleeve, a diode circuit board fastener, a flexible PCB, a connector and a diode component structure frame; the head of the LD laser diode is fixed in the diode sleeve, the pin is welded with the diode circuit board, the diode circuit board is fixed on the diode component structure frame through the diode circuit board fastener, the flexible PCB board and the diode circuit board are integrally printed and connected with the connector, and the connector is fixed on the diode component structure frame; the connector is used for providing an external power interface, and supplies power to the LD laser diode through the diode circuit board, so that the LD laser diode emits divergent laser beams with far-field spots in an elliptical shape.
The convergent lens component comprises a convergent lens reference seat, a convergent lens compression ring and a convergent lens; the convergent lens is arranged in the convergent lens reference seat and is fixed through a convergent lens compression ring; the converging lens assembly is used for converging the divergent laser beam emitted by the LD laser diode and the far-field light spot of the divergent laser beam is elliptical.
The collimation assembly comprises a diaphragm, a gasket, a reference seat, a collimation lens, an embedded part and filling glue; the diaphragm and the gasket are tightly connected with one end of the reference seat, the collimating lens is tightly connected with the other end of the reference seat, and the embedded part is fixed with the reference seat through glue filling; the collimating component is used for limiting and collimating the laser beams converged by the converging lens component, and the laser beams form emergent parallel light after passing through the collimating lens.
The convergent lens reference seat, the convergent lens compression ring and the adaptation frame are all made of low-expansion invar steel materials.
The gasket and the reference seat are both made of zero-expansion microcrystalline glass materials.
And the rest parts of the diaphragm except the central D area are blackened and subjected to light-tight treatment.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention provides a high-stability light source for space camera included angle monitoring, so that high-precision camera included angle monitoring on orbit becomes possible.
2) The invention adopts the zero-expansion glass ceramics as the reference seat, greatly reduces the influence of the inconsistency of the on-orbit thermal environment on the light deflection of the reference light source, and provides a foundation for the monitoring precision of the included angle of the space cameras at the sub-second level.
3) The invention adopts a modular design and has the characteristics of low power consumption and small volume.
Drawings
FIG. 1 is a diagram of a collimated laser light source;
FIG. 2 is a diagram of an optical system for collimating a laser light source;
fig. 3 is a front view of the diaphragm 17;
Detailed Description
As shown in fig. 1, 2 and 3, the present invention is a diagram of a collimated laser light source and a diagram of an optical system, which is a basic form of the present invention. It is composed of LD laser diode component, convergent lens component, adapting frame 13, collimation component and corresponding fastener. The diode component consists of an LD laser diode 1, a diode sleeve 2, a diode circuit board 3, a diode circuit board fastener 4, a flexible PCB board 5, a connector assembly 6 and a diode component structure frame 7, and the convergent lens component consists of a convergent lens reference seat 8, a convergent lens press ring 9 and a convergent lens 10; the collimation assembly consists of a diaphragm 17, a gasket 18, a reference seat 19, a collimation lens 20, an embedded part 15 and a filling glue 14. The fasteners include 11, 12, 16.
As shown in fig. 1, the LD laser diode assembly and the converging lens assembly are connected by fasteners 11 (three groups circumferentially and uniformly distributed), the converging lens assembly and the adapting frame are connected by fasteners 12 (three groups circumferentially and uniformly distributed), and the adapting frame and the collimating assembly are connected by fasteners 16 (four groups circumferentially and uniformly distributed); since the datum seats 19 are made of glass material, in order to provide an external fastening point, the datum seats are drilled with embedded parts 15 and are adhesively fastened by the filler 14.
As shown in fig. 1, the LD laser diode 1 has a head fixed in the diode housing 2, a pin soldered to the diode circuit board 3, the diode circuit board 3 fixed to the diode module frame 7 by the diode circuit board fastener 4, the flexible PCB5 printed integrally with the diode circuit board 3 and connected to the connector 6, and the connector 6 fixed to the diode module frame 7. The connector 6 is used for providing an external power interface, and the diode circuit board 3 supplies power to the LD laser diode 1 through the flexible PCB5, so that the LD laser diode 1 emits divergent laser beams with far-field spots in an elliptical shape.
As shown in fig. 1, a condenser lens 10 is housed in a condenser lens reference base 8 and fixed by a condenser lens pressing ring 9. The converging lens assembly is used for converging the divergent laser beam emitted by the LD laser diode 1 and the far-field light spot of the divergent laser beam is elliptical.
As shown in fig. 1 to 3, a diaphragm 17 and a spacer 18 are tightly connected to one end of a reference base 19, a collimating lens 20 is tightly connected to the other end of the reference base 19, an embedded part (15 is fixed to the reference base 19 by a filling adhesive 14. when a laser beam converged by a converging lens assembly passes through the diaphragm 17, the size of the light beam passing through the diaphragm is limited by a light-passing hole D on the diaphragm (the rest part of the diaphragm 17 except the central D region is blackened to be light-tight), and a fine laser beam passing through the diaphragm is collimated by the collimating lens 20 to form a collimated light beam 21.
As shown in fig. 1 to 3, the laser diode 1 is powered by an external power supply through the connector 6, the flexible PCB5, and the diode circuit board 3, generates a divergent laser beam with an elliptical far-field spot, and converges through the converging lens 10, when the convergent light beam passes through the diaphragm 17, the size of the light beam passing through the diaphragm is limited by the light-passing hole D on the diaphragm (the rest part of the diaphragm 17 except the central D region is blackened to be opaque), and the fine laser beam passing through the diaphragm is collimated through the collimating lens 20 to form a collimated light beam 21.
As shown in fig. 1, the convergent lens reference seat 8, the convergent lens compression ring 9 and the adaptation frame 13 are all made of low-expansion invar steel materials, and the gasket 18 and the reference seat 19 are made of zero-expansion glass-ceramic materials, so that the collimation light source designed by the invention has good thermal environment adaptability.
Claims (1)
1. A collimated light source for monitoring included angle of space camera is characterized in that: comprises an LD laser diode component, a converging lens component, an adapting frame (13) and a collimation component; the diode component is connected with the converging lens component, the converging lens component is connected with the adapting frame (13), and the adapting frame (13) is connected with the collimation component; the LD laser diode component emits divergent laser beams with oval far-field spots, the convergent lens component receives the divergent laser beams for convergence and then emits the divergent laser beams to the collimation component, and the collimation component performs aperture limitation to form fine laser beams and then performs collimation to form collimated beams;
the LD laser diode component comprises an LD laser diode (1), a diode sleeve (2), a diode circuit board (3), a diode circuit board fastener (4), a flexible PCB (5), a connector assembly (6) and a diode component structure frame (7); the head of an LD laser diode (1) is fixed in a diode sleeve (2), a pin is welded with a diode circuit board (3), the diode circuit board (3) is fixed on a diode assembly structure frame (7) through a diode circuit board fastener (4), a flexible PCB (5) and the diode circuit board (3) are integrally printed and are connected with a connector (6), and the connector (6) is fixed on the diode assembly structure frame (7); the connector (6) is used for providing an external power interface, and supplies power to the LD laser diode (1) through the diode circuit board (3), so that the LD laser diode (1) emits a divergent laser beam with an elliptical far-field light spot;
the collimation assembly comprises a diaphragm (17), a gasket (18), a reference seat (19), a collimation lens (20), an embedded part (15) and a filler (14); the diaphragm (17) and the gasket (18) are tightly connected with one end of the reference seat (19), the collimating lens (20) is tightly connected with the other end of the reference seat (19), and the embedded part (15) is fixed with the reference seat (19) through the filling glue (14); the collimating component is used for limiting and collimating the laser beams converged by the converging lens component, and the laser beams form emergent parallel light after passing through the collimating lens (20);
the LD laser diode component and the converging lens component are uniformly connected by three groups in the circumferential direction through a fastener (11), the converging lens component and the adapting frame are uniformly connected by three groups in the circumferential direction through a fastener (12), and the adapting frame and the collimating component are uniformly connected by four groups in the circumferential direction through a fastener (16); drilling a hole on the reference seat (19) to insert an embedded part (15), and bonding and fastening by using filling glue (14);
the convergent lens reference seat (8), the convergent lens compression ring (9) and the adaptation frame (13) are all made of low-expansion invar steel materials;
the gasket (18) and the reference seat (19) are both made of zero-expansion microcrystalline glass materials;
the rest part of the diaphragm (17) except the central D area is blackened and is subjected to light-tight treatment;
the convergent lens assembly comprises a convergent lens reference base (8), a convergent lens compression ring (9) and a convergent lens (10); the convergent lens (10) is arranged in a convergent lens reference seat (8) and is fixed by a convergent lens compression ring (9); the converging lens assembly is used for converging divergent laser beams emitted by the LD laser diode (1) and the far-field light spots of the divergent laser beams are elliptical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810072857.2A CN108563031B (en) | 2018-01-25 | 2018-01-25 | Collimation light source for monitoring included angle of space camera |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810072857.2A CN108563031B (en) | 2018-01-25 | 2018-01-25 | Collimation light source for monitoring included angle of space camera |
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| Publication Number | Publication Date |
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| CN108563031A CN108563031A (en) | 2018-09-21 |
| CN108563031B true CN108563031B (en) | 2021-04-13 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6577448B2 (en) * | 2001-09-25 | 2003-06-10 | Siemens Dematic Electronic Assembly Systems, Inc. | Laser system by modulation of power and energy |
| CN2618179Y (en) * | 2003-05-16 | 2004-05-26 | 金志良 | Laser calibrating light source |
| JP4280290B2 (en) * | 2007-03-28 | 2009-06-17 | Ｏｋｉセミコンダクタ株式会社 | Optical module and manufacturing method thereof |
| CN101303457A (en) * | 2008-06-30 | 2008-11-12 | 中国科学院力学研究所 | Light beam collimation uniform method of wave front recombination and light source system thereof |
| CN101629903B (en) * | 2009-08-19 | 2011-01-05 | 南京信息工程大学 | Optical system of scattering-type cloud particle detector |
| CN101949700B (en) * | 2010-08-27 | 2011-11-09 | 中国航空工业第六一八研究所 | Laser gyro cavity length control reflecting mirror assembly |
| CN202748544U (en) * | 2012-09-14 | 2013-02-20 | 常州市正宇佳华激光设备有限公司 | Laser line source module |
| US9671565B2 (en) * | 2014-10-02 | 2017-06-06 | Bae Systems Information And Electronic Systems Integration Inc. | High-power precision compact variable-focus fiber optic collimator |
| US10584832B2 (en) * | 2015-05-29 | 2020-03-10 | Signify Holding B.V. | Light emitting device combining light from several LEDs |
| CN105759254A (en) * | 2016-04-15 | 2016-07-13 | 中国科学院上海技术物理研究所 | Optical axis monitoring method and device for high precision active and passive detection system |
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