主动照明光学系统设计 -

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主动照明光学系统设计

doi:10.3788/CO.20160903.0342

中国科学院长春光学精密机械与物理研究所, 吉林长春 130033

基金项目:

国家高技术研究发展计划(863计划)资助项目No.2014AA7031082A

详细信息

通讯作者:
刘韬(1989-),男,吉林长春人,硕士,研究实习员,2012年于北京理工大学获得硕士学位,主要从事光学系统设计方面的研究。E-mail:liutaosd123@126.com

中图分类号:TN202
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- 被引次数:0
出版历程
- 收稿日期:2016-01-18
- 修回日期:2016-02-13
- 刊出日期:2016-01-25

Design of laser active illumination optical system

Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

Funds:

Supported by National High-tech R&D Program of ChinaNo.2014AA7031082A

摘要

摘要:为提高跟踪测量系统对暗弱目标的探测能力,设计一套自动化主动照明光学系统,对跟踪测量视场范围进行主动辅助照明。该系统在0.2~5 km距离处的照明直径均为10 m,计算出其在-20℃及+45℃的温度调焦量,照明仿真结果表明系统照明不均匀性<15%。通过研究系统像差对照明均匀性的影响,以及对设计的调光组进行分析,得到调光组移动量与照明距离之间的理论关系,表明自动调节调光组位置即可实现不同照明距离处的均匀照明。设计和分析结果表明,该主动照明系统能够自动调节调光组位置,实现跟踪测量视场内的均匀照明,有利于跟踪测量系统对于暗弱目标的探测。
- 主动照明/
- 自动化/
- 照度均匀
Abstract:In order to improve detection ability of tracking system for the dim target, a set of automatic laser active illumination system is designed for actively illuminating the view field of tracking and measurement. The illumination diameter is always 10 meters at a distance of 0.2 km to 5 km away from the system. The amount of focusing group movement at -20℃ and 45℃ is given. The simulation results show that the illumination nonuniformity is less than 15%. By analyzing the optical aberration effects on the illumination uniformity and designed dimming group, the theoretical relationship between the dimming group movement and the illumination distance is gotten. The design result shows that the illumination in different distances will be uniform by adjusting the dimming group position automatically. The design and analysis results show that laser active illumination system can accomplish uniform illumination for the view field of tracking and measurement by moving the dimming group, which is beneficial for the dim target detection and measurement.
- laser active illumination/
- automation/
- uniform illumination

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图 1 主动成像系统示意图

Figure 1.Schematic diagram of laser active imaging system

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图 2 主动照明光学系统结构图

Figure 2.Structure of laser active illumination system

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图 3不同距离处照度分布情况

Figure 3.Illumination distribution at different distances

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图 4调光组移动量与照明距离关系曲线

Figure 4.Relation curves between the dimming group movement and illumination distances

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图 5各照明距离对应系统波像差

Figure 5.Wave aberration RMS at different illumination distances

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图 6照明距离为0.78 km处照度分布情况

Figure 6.Illumination distribution with the illumination distance of 0.78 km

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图 7检测位置公差分析后MTF变化情况

Figure 7.MTF change of test position after tolerance analysis

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图 8照明系统结构

Figure 8.Mechanical structure of illumination system

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表 1照明距离与照明孔径角关系

Table 1.Relation between illumination distance and aperture angle

照射距离/km	照明发散角度θ/mrad	孔径角θ₁/mrad
5	2	0
3	10/3	4/3
1	10	8
0.5	20	18
0.2	50	48

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表 2不同距离处照明分布情况

Table 2.Illumination distribution at different distances

照明距离/km	10 m内接收功率/W	均匀照明直径/m	均匀区域平均照明功率/(W·m^-2)	照明不均匀性/%
5.0	48.65	9.8	0.64	8.0
1.0	50.00	7.6	0.78	13.4
0.2	48.4	9.7	0.65	9.5

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表 3不同距离处温度调焦情况

Table 3.Temperature focusing at different distances

照明距离/km	温度/℃	温度调焦量/mm
5	+45	+0.150
	-20	-0.245
1	+45	+0.144
	-20	-0.221
0.2	+45	+0.107
	-20	-0.175

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表 4理论调光组移动量与CODE V仿真结果对比表

Table 4.Contrast results of the dimming group theoretical movement and CODE V simulation

照明距离/km	理论移动量/mm	仿真结果/mm	偏差值/mm
5	0	0.010 36	0.010 36
4	0.225 4	0.235 6	0.010 2
3	0.601 1	0.599 0	-0.002 1
2	1.352 6	1.351 2	-0.001 4
1	3.606 9	3.602 0	-0.004 9
0.2	21.741 1	21.744 4	0.003 3

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