Share Email Print
cover

Proceedings Paper

Influence of range-gated intensifiers on underwater imaging system SNR
Author(s): Xia Wang; Ling Hu; Qiang Zhi; Zhen-yue Chen; Wei-qi Jin
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Range-gated technology has been a hot research field in recent years due to its high effective back scattering eliminating. As a result, it can enhance the contrast between a target and its background and extent the working distance of the imaging system. The underwater imaging system is required to have the ability to image in low light level conditions, as well as the ability to eliminate the back scattering effect, which means that the receiver has to be high-speed external trigger function, high resolution, high sensitivity, low noise, higher gain dynamic range. When it comes to an intensifier, the noise characteristics directly restrict the observation effect and range of the imaging system. The background noise may decrease the image contrast and sharpness, even covering the signal making it impossible to recognize the target. So it is quite important to investigate the noise characteristics of intensifiers. SNR is an important parameter reflecting the noise features of a system. Through the use of underwater laser range-gated imaging prediction model, and according to the linear SNR system theory, the gated imaging noise performance of the present market adopted super second generation and generation Ⅲ intensifiers were theoretically analyzed. Based on the active laser underwater range-gated imaging model, the effect to the system by gated intensifiers and the relationship between the system SNR and MTF were studied. Through theoretical and simulation analysis to the image intensifier background noise and SNR, the different influence on system SNR by super second generation and generation Ⅲ ICCD was obtained. Range-gated system SNR formula was put forward, and compared the different effect influence on the system by using two kind of ICCDs was compared. According to the matlab simulation, a detailed analysis was carried out theoretically. All the work in this paper lays a theoretical foundation to further eliminating back scattering effect, improving image SNR, designing and manufacturing higher performance underwater range-gated imaging systems.

Paper Details

Date Published: 16 August 2013
PDF: 8 pages
Proc. SPIE 8912, International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications, 89120E (16 August 2013); doi: 10.1117/12.2032840
Show Author Affiliations
Xia Wang, Science and Technology on Low-Light-Level Night Vision Lab. (China)
Beijing Institute of Technology (China)
Ling Hu, Beijing Institute of Technology (China)
Qiang Zhi, Science and Technology on Low-Light-Level Night Vision Lab. (China)
Zhen-yue Chen, Beijing Institute of Technology (China)
Wei-qi Jin, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 8912:
International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications
Benkang Chang; Hui Guo, Editor(s)

© SPIE. Terms of Use
Back to Top