7 July 1997 Real-time 3D underwater imaging and mapping using a laser line scan technique
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Recently developed undersea imaging systems are cable of providing three-dimensional surface maps of the image space using a scanning laser configuration. Triangulation methods, whereby the scene is viewed from a separate location, provide depth information, while instantaneous position of the laser scanning elements are used to estimate the lateral position in object space. A specially developed detector provides an approximate position for the apparent landing spot of the laser beam for each scan angle, which in turn, is used to compute an estimated range value in real time. Several prototype systems constructed using these techniques are in a testing phase. One system reported here is designed to scan a 10 by 10 degree field-of-view with a 10 milliwatt laser at distances from 20 to 40 centimeters with a resolution of less than 1 millimeter.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frank M. Caimi, Donna M. Kocak, "Real-time 3D underwater imaging and mapping using a laser line scan technique", Proc. SPIE 3131, Optical Scanning Systems: Design and Applications, (7 July 1997); doi: 10.1117/12.277754; https://doi.org/10.1117/12.277754

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