Optical system design of star sensor with long focal length and athermalization

Parameters	Values
Focal length/mm	95±0.5
FOV/(°)	≥8×8
Pupil(F#)	2.4
Waveband range/nm	450−1 000
Energy concentration	≥85% in 3 ×3 pixels
Centroid excursion/(″)	≤1.5
Distortion	≤0.05%
Temperature/℃	0-40

Table 2.
Distribution values of wavelength weight with different temperature stars
不同色温恒星的波长权重分配值

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Table 2.
Distribution values of wavelength weight with different temperature stars
不同色温恒星的波长权重分配值

Wavelength/nm	Temperature/K
Wavelength/nm	2 600	3 100	4 300	5 000	5 500	6 000	6 800	7 600	9 800
475	10	18	37	44	47	48	50	52	55
525	32	51	87	96	99	99	99	99	99
575	51	71	97	99	98	95	91	88	82
625	70	86	99	94	90	85	78	73	66
675	87	96	95	86	80	73	65	60	51
725	98	99	86	74	67	60	53	47	38
775	99	92	72	60	53	47	40	35	28
825	92	80	56	45	39	34	29	25	19
875	83	68	44	34	29	25	21	18	13
925	68	53	32	24	20	17	14	12	9
975	31	21	12	9	7	6	5	4	3

Table 3.
Results of optical system design
光学系统设计结果

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Table 3.
Results of optical system design
光学系统设计结果

Parameters	Results
Focal length/mm	94.932 1
FOV/(°)	8×8
Pupil(F#)	2.4
Waveband range/mm	450−1 000
Energy concentration	≥85% in 3×3 pixels
Centroid excursion/(″)	≤1.0
Distortion	≤0.003 25%
Temperature/℃	0−40

Table 4.
Relative value of centroid drifting under change of star temperature (Unit: μm)
恒星色温改变质心变化相对值（单位：μm）

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Table 4.
Relative value of centroid drifting under change of star temperature (Unit: μm)
恒星色温改变质心变化相对值（单位：μm）

Relative field		0 W	0.3 W	0.5 W	0.7 W	0.85 W	1.0 W
Relative centroid drifting/μm	2 600 K	0	−0.038 4	−0.075 6	−0.152 9	0.089 6	0.268 4
	3 100 K	0	−0.042 5	−0.068 7	0.317 5	0.207 8	−0.236 4
	4 300 K	0	−0.034 6	−0.045 2	0.249 3	0.187 6	−0.197 8
	5 000 K	0	−0.015 8	−0.027 2	0.132 1	0.096 2	0.105 8
	5 500 K	0	0	0	0	0	0
	6 000 K	0	0.008 4	0.009 6	−0.156 2	−0.126 5	−0.205 9
	6 800 K	0	0.012 7	0.015 3	−0.184 4	−0.152 3	0.079 8
	7 600 K	0	0.015 2	0.018 5	−0.232 1	−0.205 9	0.183 9
	9 800 K	0	0.027 8	0.048 7	−0.355 4	−0.248 1	0.213 1

Table 5.
Relative value of centroid drifting under change of temperature (Unit: μm)
温度改变质心变化相对值（单位：μm）

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Table 5.
Relative value of centroid drifting under change of temperature (Unit: μm)
温度改变质心变化相对值（单位：μm）

Temperature /℃	Relative field
Temperature /℃	0 W	0.3 W	0.5 W	0.7 W	0.85 W	1.0 W
0	0	−0.201 3	−0.286 4	−0.389 6	−0.254 1	−0.756 2
5	0	−0.089 5	−0.152 6	−0.256 8	−0.215 2	−0.198 3
10	0	−0.065 8	−0.095 6	−0.201 7	−0.195 8	−0.232 5
15	0	−0.023 1	−0.012 6	0.058 9	0.037 5	0.025 9
20	0	0	0	0	0	0
25	0	0.033 5	0.015 2	0.085 6	0.075 3	0.085 2
30	0	0.074 6	0.112 3	0.193 3	0.172 5	0.264 6
35	0	0.113 5	0.203 7	0.356 4	0.250 9	0.325 4
40	0	0.250 4	0.321 8	0.450 5	0.279 5	0.563 7

Table 6.
Focal lengths and relative change under different temperatures
不同温度下系统焦距及相对变化值
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Table 6.
Focal lengths and relative change under different temperatures
不同温度下系统焦距及相对变化值
Temperature /℃ 0 5 10 15 20 25 30 35 40
Focal length /mm 94.929 4 94.930 2 94.930 8 94.931 5 94.932 1 94.932 7 94.933 3 94.933 9 94.934 5
Difference /μm −2.7 −1.9 −1.3 −0.6 0 0.6 1.2 1.8 2.4

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Yanxiong Wu, Jian Qiao, Liping Wang. Optical system design of star sensor with long focal length and athermalization[J]. Infrared and Laser Engineering, 2020, 49(9): 20200061

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Paper Information

Category: Optical design

Received: Mar. 1, 2020

Accepted: --

Published Online: Jan. 4, 2021

The Author Email: Wang Liping (home313@126.com)

DOI:10.3788/IRLA20200061

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Parameters of optical system design光学系统设计指标

Table 1. Parameters of optical system design光学系统设计指标

Table 2. Distribution values of wavelength weight with different temperature stars不同色温恒星的波长权重分配值

Table 2. Distribution values of wavelength weight with different temperature stars不同色温恒星的波长权重分配值

Table 3. Results of optical system design光学系统设计结果

Table 3. Results of optical system design光学系统设计结果

Table 4. Relative value of centroid drifting under change of star temperature (Unit: μm)恒星色温改变质心变化相对值（单位：μm）

Table 4. Relative value of centroid drifting under change of star temperature (Unit: μm)恒星色温改变质心变化相对值（单位：μm）

Table 5. Relative value of centroid drifting under change of temperature (Unit: μm)温度改变质心变化相对值（单位：μm）

Table 5. Relative value of centroid drifting under change of temperature (Unit: μm)温度改变质心变化相对值（单位：μm）

Table 6. Focal lengths and relative change under different temperatures不同温度下系统焦距及相对变化值

Table 6. Focal lengths and relative change under different temperatures不同温度下系统焦距及相对变化值

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Table 1.
Parameters of optical system design
光学系统设计指标

Table 1.
Parameters of optical system design
光学系统设计指标

Table 2.
Distribution values of wavelength weight with different temperature stars
不同色温恒星的波长权重分配值

Table 2.
Distribution values of wavelength weight with different temperature stars
不同色温恒星的波长权重分配值

Table 3.
Results of optical system design
光学系统设计结果

Table 3.
Results of optical system design
光学系统设计结果

Table 4.
Relative value of centroid drifting under change of star temperature (Unit: μm)
恒星色温改变质心变化相对值（单位：μm）

Table 4.
Relative value of centroid drifting under change of star temperature (Unit: μm)
恒星色温改变质心变化相对值（单位：μm）

Table 5.
Relative value of centroid drifting under change of temperature (Unit: μm)
温度改变质心变化相对值（单位：μm）

Table 5.
Relative value of centroid drifting under change of temperature (Unit: μm)
温度改变质心变化相对值（单位：μm）

Table 6.
Focal lengths and relative change under different temperatures
不同温度下系统焦距及相对变化值

Table 6.
Focal lengths and relative change under different temperatures
不同温度下系统焦距及相对变化值