22 July 1997 Underwater laser imaging system (ULIS)
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Abstract
This paper describes design and characteristics of an underwater laser imaging systems (ULIS) developed for detection of underwater mines and mine-like targets. The ULIS uses a diode pumped Nd:YLF laser, frequency doubled to 523.5 nm as a transmitter and an image intensifier tube (IIT) as a receiver. The transmitter uses an innovative technique of frequency stabilization to reduce laser line- width so that the receiver can use a less than 1 nm narrow band pass filter. This results in a significant reductio of the back-ground noise in the receiver. Also, the IIT based receiver is range gated to reduce back-scatter noise. A polygon scanner is used in the ULIS with the transmitter and the receiver to obtained range resolved imagery. Description of the system components and performance characteristics of the system as ladar are provided.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. A. Acharekar, M. A. Acharekar, } "Underwater laser imaging system (ULIS)", Proc. SPIE 3079, Detection and Remediation Technologies for Mines and Minelike Targets II, (22 July 1997); doi: 10.1117/12.280903; https://doi.org/10.1117/12.280903
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