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Environmental performance bounds for undersea pulsed laser serial imagers

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Date Issued:
Title: Environmental performance bounds for undersea pulsed laser serial imagers.
Name(s): Dalgleish, Fraser R.
Vuorenkoski, Anni K.
Nootz, G.
Ouyang, Bing
Caimi, F. M.
Type of Resource: text
Genre: Article
Date Issued: 2013
Publisher: United States Naval Research Laboratory
Place of Publication: Washington, D.C.
Physical Form: pdf
Extent: 26 p.
Language(s): English
Identifier: FA00007401 (IID)
Note(s): This paper examines imaging performance bounds for undersea electro-optic identification (EOID) sensors that use pulsed-laser line scanners to form serial images, typically utilizing one laser pulse for each formed image element. The experimental results presented include the use of two distinct imaging geometries; firstly where the laser source and single element optical detector are nearly co-aligned (near monostatic) and secondly where the laser source is deployed on a separate platform positioned closer to the target (bistatic) with the detector being positioned much further from the target. The former system uses synchronous scanning in order to significantly limit the required instantaneous angular acceptance function of the detector and has the desired intention of acquiring only ballistic photons and the undesirable property of acquiring multiply-scattered snake photon contributions that indirectly arrive into the detector aperture. The latter system utilizes a staring detector with a much wider angular acceptance function, the objective being to deliver maximum photon density to each target element and acquire diffuse, snake and ballistic photon contributions in order to maximize the signal. The study investigates received pulse energy variance from both the direct (target) component and the snake (forward scatter) in clear filtered water, as well as various well-characterized particle suspensions with and without an artificial thin random scattering layer. For each dataset, efforts were made to measure variance due to device shot noise in order to assess the impact of the environment on image quality.
Florida Atlantic University. Harbor Branch Oceanographic Institute contribution 1834
This manuscript is an author version with the final publication available and may be cited as: Dalgleish, F. R., Vuorenkoski, A. K., Nootz, G., Ouyang, B., & Caimi, F. M. (2013). Environmental performance bounds for undersea pulsed laser serial imagers. Journal for Underwater Acoustics (US Navy), Special Edition on Electro-Optics, Online June 27, 2013 SIPRNet.
Subject(s): Underwater imaging systems
Imaging systems--Image quality
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Host Institution: FAU