Researching | Measurement of underwater camera imaging resolution using underwater collimator

Infrared and Laser Engineering, Volume. 52, Issue 2, 20220397(2023)

Measurement of underwater camera imaging resolution using underwater collimator

Zhe Ding^1,2, Guojun Wu^1,2, Yafeng Wu¹, Fei Feng^1,2, and Bo Liu¹

Author Affiliations

¹Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China

²University of Chinese Academy of Sciences, Beijing 100049, China

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Fig. 1. Schematic diagram of underwater camera resolution measurement

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Fig. 2. Optical path of underwater collimator system

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Fig. 3. USAF1951 Φ30×3 mm negative film

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Fig. 4. Underwater collimator aberration curve

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Fig. 5. Underwater collimator aberration curve in water and air

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Fig. 6. Underwater collimator MTF curve at different wavelengths

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Fig. 7. Experimental setup

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Fig. 8. Detection results

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Table 1. USAF1951 line pair count (Unit: lp/mm)

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Table 1. USAF1951 line pair count (Unit: lp/mm)

Element	Group number
Element	0	1	2	3	4	5	6
1	1.00	2.00	4.00	8.00	16.00	32.00	64.00
2	1.12	2.24	4.49	8.98	17.95	36.00	71.80
3	1.26	2.52	5.04	10.10	20.16	40.30	80.60
4	1.41	2.83	5.66	11.30	22.62	45.30	90.50
5	1.59	3.17	6.35	12.70	25.39	50.80	102.00
6	1.78	3.56	7.13	14.30	28.51	57.00	114.00

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Zhe Ding, Guojun Wu, Yafeng Wu, Fei Feng, Bo Liu. Measurement of underwater camera imaging resolution using underwater collimator[J]. Infrared and Laser Engineering, 2023, 52(2): 20220397

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Paper Information

Category: Optical design

Received: Jun. 8, 2022

Accepted: --

Published Online: Mar. 13, 2023

The Author Email:

DOI:10.3788/IRLA20220397

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology