Algorithm for Suppressing Optical Spot Crosstalk in Angular Position Detection of Micromirror Array

Ting Wang; Jingpei Hu; Lihua Huang; Aijun Zeng; Huijie Huang; Sergey Avakaw

doi:10.3788/CJL230482

Journals >Chinese Journal of Lasers >Volume 50 >Issue 23 >Page 2304003 > Article

Chinese Journal of Lasers
Vol. 50, Issue 23, 2304003 (2023)

Algorithm for Suppressing Optical Spot Crosstalk in Angular Position Detection of Micromirror Array

Ting Wang^1、2, Jingpei Hu^1、2、*, Lihua Huang^1、2, Aijun Zeng^1、2, Huijie Huang^1、2, and Sergey Avakaw³

Author Affiliations

¹Laboratory of Information Optics and Optoelectronic Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

²Centerof Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

³Company of KBTEM-OMO Republication Unitary Scientific and Production Enterprise, Minsk 220033, Belarus

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DOI: 10.3788/CJL230482 Cite this Article Set citation alerts

Ting Wang, Jingpei Hu, Lihua Huang, Aijun Zeng, Huijie Huang, Sergey Avakaw. Algorithm for Suppressing Optical Spot Crosstalk in Angular Position Detection of Micromirror Array[J]. Chinese Journal of Lasers, 2023, 50(23): 2304003 Copy Citation Text

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Fig. 1. Schematics of MMA

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Fig. 2. Schematic of angle position detection module

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Fig. 3. Schematic of light intensity distribution of large size Gaussian spot on MMA

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Gaussian beam divergence angle /（°）	Size of spot along long axis /mm	Size of spot along short axis /mm	Size ratio	Extra-spot ratio
0.024	0.470614	0.392755	0.28880	0
0.050	0.943926	0.777051	1.14606	0.14606
0.070	1.316465	1.079978	2.22149	1.22149

Table 1. Ratio of Gaussian spot size on MMA to MMA mirror size under different Gaussian divergence angles

Mirror No.	Extra-spot ratio is 0		Extra-spot ratio is 14.6%		Extra-spot ratio is 122.1%
Mirror No.	$α$	$β$	$α$	$β$	$α$	$β$
1	1.78	1.20×10^-2	411.78	1.96	980.72	19.01
2	1.75	1.97×10^-2	295.45	171.78	340.69	930.71
3	1.78	8.59×10^-3	411.42	1.26	981.29	10.91
4	1.56	1.35×10^-2	413.54	27.60	828.47	292.78
5	4.59	4.35	1630.42	1587.64	5181.64	5387.48
6	1.57	3.39×10^-2	412.34	28.13	826.03	285.32
7	1.56	2.16×10^-2	396.32	2.73	947.39	16.84
8	1.56	5.72×10^-2	278.23	173.74	300.24	933.25
9	1.58	6.56×10^-2	395.90	2.02	945.72	9.52

Table 2. Errors of mirror angular positions without crosstalk suppression algorithm

Mirror No.	Extra-spot ratio is 0		Extra-spot ratio is 14.6%		Extra-spot ratio is 122.1%
Mirror No.	$α$	$β$	$α$	$β$	$α$	$β$
1	2.27×10^-2	5.60×10^-3	2.41×10^-1	5.11×10^-1	7.29	4.45
2	2.09×10^-2	5.37×10^-3	2.11×10^-1	6.61×10^-2	7.02	2.47×10^-1
3	2.09×10^-2	3.77×10^-3	2.37×10^-1	4.55×10^-1	7.29	4.42
4	3.49×10^-3	3.70×10^-3	2.44×10^-2	4.91×10^-1	1.26×10^-1	4.27
5	0	0	1.75×10^-2	1.75×10^-2	1.75×10^-2	1.75×10^-2
6	1.75×10^-3	1.66×10^-3	2.27×10^-2	4.37×10^-1	8.73×10^-2	4.26
7	1.92×10^-2	3.14×10^-4	2.95×10^-1	4.58×10^-1	7.27	4.33
8	1.92×10^-2	4.97×10^-5	1.85×10^-1	1.77×10^-2	6.90	2.69×10^-1
9	1.92×10^-2	1.15×10^-3	2.91×10^-1	4.13×10^-1	7.24	4.29

Table 3. Errors of mirror angular positions with crosstalk suppression algorithm

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