CN103499848B - Laser micro thruster optical system and installation method thereof - Google Patents
Laser micro thruster optical system and installation method thereof Download PDFInfo
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Abstract
The invention belongs to the field of optics, and particularly relates to an optical system of a laser micro thruster and an installation method thereof, which are mainly used for developing the laser micro thruster in an attitude adjustment system of a space micro satellite. The laser micro thruster optical system comprises a semiconductor laser, a diffraction element high-order aspheric surface micro lens array and a target zone, wherein the semiconductor laser is arranged in the laser micro thruster; laser of the semiconductor laser forms a laser target surface through convergence of the high-order aspheric micro lens array of the diffraction element, the laser target surface is adjusted to coincide with a target zone during installation, and then the target zone is ablated to generate strong thrust. The invention has the advantages of volume, light weight, good focusing effect, simple debugging method, low energy consumption and the like.
Description
Technical field
The invention belongs to optical field, be specifically related to a kind of laser micro thruster optical system and installation method thereof, be mainly used in the development of laser microthruster in space flight microsatellite attitude adjustment System.
Background technology
Laser microthruster is a kind of novel micromass culture system, is mainly used in the position maintenance of minitype spacecraft, gesture stability, gravitation compensation and orbit adjusting.The laser micro thruster optical system studied herein is mainly used in focusing on the integer of superlaser.Laser micro thruster optical system complex structure in the past, bulky, the miniaturization of space flight microsatellite, low-power consumption demand for development cannot be met.Therefore, need to study a kind of miniaturization, light-weighted optical system, to meet the manufacture claim of microsatellite.
At present, the key of laser microthruster model machine performance concentrates on 2 points: improve the power density of hot spot and improve target performance, therefore, this just requires that laser micro thruster optical system should have good focusing performance.Thrust technical optics system for aerospacecraft mainly contains two kinds, the first: realize Laser Focusing ablation by parabolic type condenser; The second: the hot spot being realized laser instrument by poly-lens group focuses on ablation.Although above-mentioned two kinds of methods are widely used in Practical Project, still there is a lot of defect.Although first method is very strong for thrust that it produces aerospacecraft, structure is simple, be easy to realize, but for space flight Microstar, first require that the physical dimension of microthruster is little, but adopt its physical dimension will be made in this way to strengthen, Microstar's global design miniaturization, light-weighted requirement cannot be met.Second method, although come into operation successively in a lot of Microstar, but the application of many mirrors group not only light path complexity, debugging also difficulty, focusing effect is not good all the time, causes system energy efficiency to reduce.In order to meet final use, total power input can only be improved, thus the power consumption making system total increases, and will greatly reduce the serviceable life in-orbit of Microstar like this.Therefore, above-mentioned two kinds of methods are badly in need of improving further.
In sum, considering that the research of this problem is the gordian technique for developing space flight microsatellite, the research of this technology success, will imply that domestic space flight Microstar microthrust technology enters a new step.Therefore, carry out the research of laser micro thruster optical system, play promotion effect by the development of China's space satellite cause.
Summary of the invention
In order to solve the problem in background technology, the invention provides a kind of miniaturization, lightweight and a kind of laser micro thruster optical system that focusing effect is good, adjustment method is simple, energy consumption is little and installation method thereof.
Concrete technical scheme of the present invention is:
A kind of laser micro thruster optical system, comprises the semiconductor laser, diffraction element high order aspheric surface microlens array and the target band that are arranged on laser microthruster inside;
Described diffraction element high order aspheric surface microlens array is arranged between semiconductor laser emergent ray and target band incident ray; Described semiconductor laser emergent ray is converged by diffraction element high order aspheric surface microlens array and forms laser target surface; Described laser target surface and target band coincide;
Described target band produces ablation under the effect of laser beam; Described target band adopts black ink paper or double-base powder to make.
The installation method of this optical system is now provided based on above-mentioned laser micro thruster optical system, it is characterized in that, comprise the following steps:
Step 1] diffraction element high order aspheric surface microlens array connects to form by multiple diffraction element aspherical microlens, the Connection Step of this diffraction element high order aspheric surface microlens array is:
Step 1.1) first diffraction element high order aspheric surface lenticule is placed on the two-dimension adjustment platform of composite instrument, by the position that the microscopic system of composite instrument finds first diffraction element high order aspheric surface lenticule to place, and this position is recorded as initial position;
Step 1.2) by the movement of two-dimension adjustment platform, first diffraction element high order aspheric surface lenticule is migrated out the field of view center of microscopic system, then second diffraction element high order aspheric surface lenticule is placed on two-dimension adjustment platform, and first diffraction element high order aspheric surface lenticule and second diffraction element high order aspheric surface lenticule are coupled together;
Step 1.3) observe second lenticular attitude of diffraction element high order aspheric surface by the imaging being arranged on the monitor on composite instrument, and adjust second lenticular attitude of diffraction element high order aspheric surface, ensure first diffraction element high order aspheric surface lenticule and confocal of second diffraction element high order aspheric surface lenticule;
Step 1.4) repeat step 1.2) and 1.3), required multiple diffraction element high order aspheric surface lenticules are coupled together, need observe the lenticular attitude of each diffraction element high order aspheric surface by monitor thus adjust the lenticular attitude of each diffraction element high order aspheric surface in connection procedure, make multiple confocal of diffraction element high order aspheric surface lenticule, finally form diffraction element high order aspheric surface microlens array;
Step 2] laser thruster is placed on two-dimension adjustment platform, then semiconductor laser, target band are mounted in laser microthruster, again by step 1.4) in mounted diffraction element high order aspheric surface microlens array be arranged between semiconductor laser and target band, utilize the microscopic system of composite instrument to adjust, until the laser target surface of semiconductor laser emergent ray formation after diffraction element high order aspheric surface microlens array converges and target band coincide, the ablation of target band, thus produce powerful expulsive force.
Above-mentioned diffraction element high order aspheric surface microlens array is connected by the mode of glueing joint by multiple diffraction element high order aspheric surface lenticule.
The semiconductor laser target bar above-mentioned semiconductor laser is provided with for semiconductor laser heat radiation is heat sink.
The invention has the beneficial effects as follows:
1. this laser micro thruster optical system and installation method thereof, optical system adopts diffraction element high order aspheric surface microlens array first, changes with laser micro thruster optical system method for designing in the past, and system architecture is simpler, physical dimension is less;
2. this laser micro thruster optical system and installation method thereof, it is higher that the Curve guide impeller of optical system can imitate utilization factor, greatly can reduce the power consumption utilization rate of satellite, extend the serviceable life of satellite;
3. this laser micro thruster optical system and installation method thereof, change existing optical system alignment theory, utilize composite instrument monitoring technology, control the posture position of each lens in real time, can the mutual alignment of each lens of rapid adjustment, ensure that lens arra has good consistance;
4. this laser micro thruster optical system and installation method thereof, when optical system is installed, utilizes two-dimension adjustment platform can splice multiple lens array simultaneously, ensure that debuging fast of multiple lens array, and what improve many group optical systems debugs efficiency.
Accompanying drawing explanation
Fig. 1 laser micro thruster optical system structural representation.
Fig. 2 laser micro thruster optical system installation diagram.
Reference numeral is as follows:
1-semiconductor laser target bar is heat sink; 2-semiconductor laser; 3-diffraction element high order aspheric surface microlens array; 4-target band; 5-composite instrument; 6-microscopic system; 7-two-dimension adjustment platform; 8-monitor.
Embodiment
Below laser micro thruster optical system of the present invention and installation method thereof are described in detail:
As shown in Figure 1, the laser micro thruster optical system in the present invention mainly comprises the semiconductor laser 2, diffraction element high order aspheric surface microlens array 3 and the target band 4 that are arranged on laser microthruster inside;
Diffraction element high order aspheric surface microlens array 3 is arranged between semiconductor laser 2 emergent ray and target band incident ray; Semiconductor laser 2 emergent ray is converged by diffraction element high order aspheric surface microlens array 3 and forms laser target surface; Laser target surface and target band 4 coincide, and now target band 4 ablation, produces powerful energy afterwards, for providing the powerful expulsive force needed for laser microthruster.
In addition, semiconductor laser target bar semiconductor laser is provided with for semiconductor laser heat radiation is heat sink.
Specifically, the target band 4 in the present invention adopts black ink paper or double-base powder to make usually.
Composition graphs 2, the installation method of laser micro thruster optical system in the present invention, comprises the following steps:
First be the installation method of diffraction element high order aspheric surface microlens array:
Step 1] diffraction element high order aspheric surface microlens array 3 connects to form by multiple diffraction element aspherical microlens, the Connection Step of this diffraction element high order aspheric surface microlens array is:
Step 1.1) first diffraction element high order aspheric surface lenticule is placed on the two-dimension adjustment platform 7 of composite instrument 5, by the position that the microscopic system 6 of composite instrument 8 finds first diffraction element high order aspheric surface lenticule to place, and this position is recorded as initial position;
Step 1.2) by the movement of two-dimension adjustment platform 7, first diffraction element high order aspheric surface lenticule is migrated out the field of view center of microscopic system 6, then second diffraction element high order aspheric surface lenticule to be placed on two-dimension adjustment platform 7 and first diffraction element high order aspheric surface lenticule and second diffraction element high order aspheric surface lenticule are coupled together;
Step 1.3) observe second lenticular attitude of diffraction element high order aspheric surface by the monitor 8 be arranged on composite instrument 5, adjust second lenticular attitude of diffraction element high order aspheric surface, ensure first diffraction element high order aspheric surface lenticule and confocal of second diffraction element high order aspheric surface lenticule;
Step 1.4) repeat step 2.2) and 2.3), required multiple diffraction element high order aspheric surface lenticules are coupled together, need by monitoring that 8 devices are observed the lenticular attitude of each diffraction element high order aspheric surface thus adjust the lenticular attitude of each diffraction element high order aspheric surface in connection procedure, make multiple confocal of diffraction element high order aspheric surface lenticule, finally form diffraction element high order aspheric surface microlens array 3;
Step 2] laser thruster is placed on two-dimension adjustment platform 7, then semiconductor laser 2, target band 4 are mounted in laser microthruster, again by step 1.4) in mounted diffraction element high order aspheric surface microlens array 3 be arranged between semiconductor laser 2 and target band 4, the microscopic system 6 of composite instrument 5 is utilized to adjust, until the laser target surface of semiconductor laser 2 emergent ray formation after diffraction element high order aspheric surface microlens array 3 converges and target band 4 coincide, target band 4 ablation, thus produce powerful expulsive force.
Special feature, the diffraction element high order aspheric surface microlens array in the present invention is connected to form by the mode of glueing joint by multiple diffraction element high order aspheric surface lenticule.
By the usage quantity adopting diffraction element high order aspheric surface lens effectively can reduce optical element, thus the physical dimension of optical system can be made to reduce, and effectively can improve the efficiency of light energy utilization, its final efficiency of light energy utilization can be increased to 86% by former 65%.
Claims (5)
1. a laser micro thruster optical system, is characterized in that: comprise the semiconductor laser, diffraction element high order aspheric surface microlens array and the target band that are arranged on laser microthruster inside;
Described diffraction element high order aspheric surface microlens array is arranged between semiconductor laser emergent ray and target band incident ray; Described semiconductor laser emergent ray is converged by diffraction element high order aspheric surface microlens array and forms laser target surface; Described laser target surface and target band coincide;
Described target band produces ablation under the effect of laser beam; Described target band adopts black ink paper or double-base powder to make.
2. an installation method for laser micro thruster optical system, is characterized in that, comprises the following steps:
1] because diffraction element high order aspheric surface microlens array is connected to form by multiple diffraction element aspherical microlens, the Connection Step of this diffraction element high order aspheric surface microlens array is:
1.1) first diffraction element high order aspheric surface lenticule is placed on the two-dimension adjustment platform of composite instrument, by the position that the microscopic system of composite instrument finds first diffraction element high order aspheric surface lenticule to place, and this position is recorded as initial position;
1.2) by the movement of two-dimension adjustment platform, first diffraction element high order aspheric surface lenticule is migrated out the field of view center of microscopic system, then second diffraction element high order aspheric surface lenticule is placed on two-dimension adjustment platform, and first diffraction element high order aspheric surface lenticule and second diffraction element high order aspheric surface lenticule are coupled together;
1.3) second lenticular attitude of diffraction element high order aspheric surface is observed in the imaging by being arranged on the monitor on composite instrument, and adjust second lenticular attitude of diffraction element high order aspheric surface, ensure first diffraction element high order aspheric surface lenticule and confocal of second diffraction element high order aspheric surface lenticule;
1.4) step 1.2 is repeated) and 1.3), required multiple diffraction element high order aspheric surface lenticules are coupled together, need observe the lenticular attitude of each diffraction element high order aspheric surface by monitor thus adjust the lenticular attitude of each diffraction element high order aspheric surface in connection procedure, make multiple confocal of diffraction element high order aspheric surface lenticule, finally form diffraction element high order aspheric surface microlens array;
2] laser thruster is placed on two-dimension adjustment platform, then semiconductor laser, target band are mounted in laser microthruster, again by step 1.4) in mounted diffraction element high order aspheric surface microlens array be arranged between semiconductor laser and target band, utilize the microscopic system of composite instrument to adjust, until the laser target surface of semiconductor laser emergent ray formation after diffraction element high order aspheric surface microlens array converges and target band coincide.
3. laser micro thruster optical system according to claim 1, is characterized in that: described diffraction element high order aspheric surface microlens array is connected by the mode of glueing joint by multiple diffraction element high order aspheric surface lenticule.
4. the installation method of laser micro thruster optical system according to claim 2, is characterized in that: described diffraction element high order aspheric surface microlens array is connected by the mode of glueing joint by multiple diffraction element high order aspheric surface lenticule.
5. the laser micro thruster optical system according to claim 1 or 3, is characterized in that: the semiconductor laser target bar described semiconductor laser is provided with for semiconductor laser heat radiation is heat sink.
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| CN106597629A (en) * | 2016-12-29 | 2017-04-26 | 中国科学院西安光学精密机械研究所 | Micro-lens optical splicing system and method |
| CN116296270B (en) * | 2023-02-15 | 2024-04-26 | 中国人民解放军战略支援部队航天工程大学 | Method and system for monitoring on-orbit working state of target belt type laser ablation micro-thruster |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5148322A (en) * | 1989-11-09 | 1992-09-15 | Omron Tateisi Electronics Co. | Micro aspherical lens and fabricating method therefor and optical device |
| CN102022299A (en) * | 2010-12-07 | 2011-04-20 | 中国人民解放军国防科学技术大学 | Laser microthruster |
| CN102749042A (en) * | 2012-07-16 | 2012-10-24 | 南京理工大学 | Double-triangle type multi-channel medium wave infrared interference detection device |
| CN103165717A (en) * | 2013-03-29 | 2013-06-19 | 苏州百纳思光学科技有限公司 | Concentrating photovoltaic module comprising small Fresnel lens array |
| CN203480064U (en) * | 2013-09-06 | 2014-03-12 | 中国科学院西安光学精密机械研究所 | Laser micro thruster optical system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06229871A (en) * | 1993-02-02 | 1994-08-19 | Hitachi Cable Ltd | Adjusting method for optical axis of optical component |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5148322A (en) * | 1989-11-09 | 1992-09-15 | Omron Tateisi Electronics Co. | Micro aspherical lens and fabricating method therefor and optical device |
| CN102022299A (en) * | 2010-12-07 | 2011-04-20 | 中国人民解放军国防科学技术大学 | Laser microthruster |
| CN102749042A (en) * | 2012-07-16 | 2012-10-24 | 南京理工大学 | Double-triangle type multi-channel medium wave infrared interference detection device |
| CN103165717A (en) * | 2013-03-29 | 2013-06-19 | 苏州百纳思光学科技有限公司 | Concentrating photovoltaic module comprising small Fresnel lens array |
| CN203480064U (en) * | 2013-09-06 | 2014-03-12 | 中国科学院西安光学精密机械研究所 | Laser micro thruster optical system |
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