Influence of Locally Concentrated Stress in Quartz on Precision of Digital Sun Sensors

Chongjin Song; Hongxia Xi; Jun Cao; Haibo Qu; Li Chen; Yan Liu; Junjie An

doi:10.3788/LOP55.061601

Laser & Optoelectronics Progress, Volume. 55, Issue 6, 061601(2018)

Influence of Locally Concentrated Stress in Quartz on Precision of Digital Sun Sensors

Chongjin Song^{1,2、1; 2;}, Hongxia Xi^{1,2、1; 2;}, Jun Cao^{1,2、1; 2;}, Haibo Qu^{1,2、1; 2;}, Li Chen^{1,2、1; 2;}, Yan Liu^{1,2、1; 2;}, and Junjie An^{1,2、1; 2;}

Author Affiliations

¹ Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China

² Key Laboratory of Infrared System Detection and Imaging Technology, Chinese Academy of Sciences,Shanghai 200083, China

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Figures & Tables(10)

Fig. 1. Working principle for four-holes APS sun sensor

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Fig. 2. Schematic of optical structure for digital sun sensor

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Fig. 3. Impact of interference spot on centroid

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Fig. 4. Schematic of optical path for quarter-wave plate method

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Fig. 5. Stress distribution of different quartz specimens. (a) 1#; (b) 2#; (c) 3#; (d) 4#

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Fig. 6. Schematic of calibration system for sun sensor

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Fig. 7. Light spot images of different quartz specimens when azimuthal angle is 40° and pitch angle is 10°. (a) 1#; (b) 2#; (c) 3#; (d) 4#

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Fig. 8. Light spot images of different quartz specimens when azimuthal angle is 40° and pitch angle is 20°. (a) 1#; (b) 2#; (c) 3#; (d) 4#

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Table 1. Levels of stress birefringence of JGS1 quartz materials[5]
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Table 1. Levels of stress birefringence of JGS1 quartz materials[5]
Classification Birefringence δ_n /(nm·cm^-1)
Level Ⅰ ≤2
Level Ⅱ 2-6
Level Ⅲ 6-10
Level Ⅳ 10-20
Level Ⅴ 20-50

Table 2. Range of interference spot in full visual field

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Table 2. Range of interference spot in full visual field

Pitch angle δ /(°)	Azimuth angle a /(°)
9	39.9179-40.5193
10	39.9000-40.5017
11	39.7906-40.4930
12	39.7902-40.4931
13	39.7988-40.4017
14	39.8163-40.4197
15	39.7422-40.3463
16	39.6770-40.3823
17	39.6208-40.2261
18	39.5737-40.1799
19	39.6369-40.1426
20	39.5069-40.1149
21	39.4875-39.8936
22	39.4775-39.8842
23	39.4771-39.7829
24	39.4864-39.6907
25	39.1983-39.7102
26	39.0214-39.5348
27	38.9564-39.2655
28	38.7978-39.2113
29	38.9595-39.1668

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Chongjin Song, Hongxia Xi, Jun Cao, Haibo Qu, Li Chen, Yan Liu, Junjie An. Influence of Locally Concentrated Stress in Quartz on Precision of Digital Sun Sensors[J]. Laser & Optoelectronics Progress, 2018, 55(6): 061601

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