Distortion analysis and focal length testing of off-axis optical system

Qiang CHENG; Haixiang HU; Longxiang LI; Xiaokun WANG; Xiao LUO; Xuejun ZHANG

doi:10.37188/OPE.20223022.2839

Optics and Precision Engineering, Volume. 30, Issue 22, 2839(2022)

Distortion analysis and focal length testing of off-axis optical system

Qiang CHENG^1、*, Haixiang HU¹, Longxiang LI¹, Xiaokun WANG¹, Xiao LUO¹, and Xuejun ZHANG^1,2

¹Changchun Institute of Optics， Fine Mechanics and Physics， Chinese Academy of Sciences， Key Laboratory of Optical System Advanced Manufacturing Technology， Changchun30033， China

²University of Chinese Academy of Sciences， Beijing100049， China

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Figures & Tables(5)

Fig. 1. Distortion measurement schematic diagram

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Fig. 2. Corresponding relationship between feature points on each detector and ground object coordinates

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Table 1. Comparison between equivalent focal length calculated by the fifth order distortion coefficient and ZEMAX ray tracing results

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Table 1. Comparison between equivalent focal length calculated by the fifth order distortion coefficient and ZEMAX ray tracing results

离轴角Y/（°）	视场角X/（°）	方向	五阶畸变系数/mm	ZEMAX光线追迹/mm	绝对偏差/mm
3.96	0	X	8 836.990	8 836.983	0.007
3.96	0	Y	9 019.132	9 019.185	-0.053
3.96	0.5	X	8 841.366	8 841.340	0.026
3.96	0.5	Y	9 020.857	9 020.887	-0.03
3.96	1	X	8 854.559	8 854.453	0.106
3.96	1	Y	9 026.046	9 026.009	0.037
3.96	1.5	X	8 876.756	8 876.514	0.242
3.96	1.5	Y	9 034.740	9 034.596	0.144
3.96	1.75	X	8 891.323	8 891.447	-0.124
3.96	1.75	Y	9 040.422	9 040.688	-0.266
4.33	0	X	8 855.021	8 855.017	0.004
4.33	0	Y	9 076.584	9 076.771	-0.187
4.33	0.5	X	8 859.478	8 859.787	-0.309
4.33	0.5	Y	9 078.388	9 078.554	-0.166
4.33	1	X	8 872.910	8 872.790	0.12
4.33	1	Y	9 083.816	9 083.920	-0.104
4.33	1.5	X	8 895.508	8 895.235	0.273
4.33	1.5	Y	9 092.909	9 092.917	-0.008
4.33	1.75	X	8 910.336	8 909.970	0.366
4.33	1.75	Y	9 098.851	9 098.803	0.048

Table 2. Object two dimension angle and actual image height data table on grid plate

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Table 2. Object two dimension angle and actual image height data table on grid plate

序号	物方角度/（°）		实际像高数据/mm
序号	X	Y	X	Y
1	4.237	-1.532 8	656.761	-237.195
2	3.983	-1.194 7	615.960	-184.485
3	4.240	-0.852 6	656.760	-131.775
4	3.985	-0.512 5	615.961	-79.065
5	4.241	-0.170 6	656.759	-26.355
6	3.984	0.170 8	615.962	26.355
7	4.239	0.511 7	656.761	79.065
8	3.985	0.853 8	615.961	131.775
9	4.242	1.193 0	656.762	184.485
10	3.982	1.535 2	615.960	237.195

Table 3. Coordinates of three feature points on each detector

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Table 3. Coordinates of three feature points on each detector

探测器序号	特征点1	特征点2	特征点3
1	（-210.315，667.8）	（-237.195，667.8）	（-264.075，667.8）
2	（-157.605，627）	（-184.485，627）	（-211.365，627）
3	（-104.895，667.8）	（-131.775，667.8）	（-158.665，667.8）
4	（-52.185，627）	（-79.065，627）	（-105.945，627）
5	（0.525，667.8）	（-26.355，667.8）	（-53.235，667.8）
6	（53.235，627）	（26.355，627）	（-0.525，627）
7	（105.945，667.8）	（79.065，667.8）	（52.185，667.8）
8	（158.655，627）	（131.775，627）	（104.895，627）
9	（211.365，667.8）	（184.485，667.8）	（157.605，667.8）
10	（264.075，627）	（237.195，627）	（210.315，627）

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Qiang CHENG, Haixiang HU, Longxiang LI, Xiaokun WANG, Xiao LUO, Xuejun ZHANG. Distortion analysis and focal length testing of off-axis optical system[J]. Optics and Precision Engineering, 2022, 30(22): 2839

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Paper Information

Category: Modern Applied Optics

Received: Apr. 25, 2022

Accepted: --

Published Online: Nov. 28, 2022

The Author Email: CHENG Qiang (chengq@ciomp.ac.cn)

DOI:10.37188/OPE.20223022.2839

Topics

laser devices and laser physics

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