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Optical Engineering

Development of a miniature single lens dual-aperture stereo imaging system towards stereo endoscopic imaging application
Author(s): Sam Y. Bae; Ronald J. Korniski; John M. Choi; Michael Shearn; Poyan Bahrami; Harish M. Manohara; Hrayr K. Shahinian
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Paper Abstract

Studies have shown that stereo images improve surgeons' visuomotor tasks and therefore constructively affect the outcome of a minimally invasive surgery. Stereo images are captured by a stereo endoscope, which consists commonly of duplicate lens systems. However, stereo images can also be captured by a single lens system following a dual aperture scheme (DAS). DAS creates two spatially separated optical channels by placing a dual aperture plate in the limiting aperture of a single lens system. This paper describes efforts to miniaturize the DAS-based imaging system for use in minimally invasive surgery. To demonstrate feasibility, a prototype was fabricated using lens elements 3 mm in diameter and was tested for its stereo depth effect (SDE). The SDE of the prototype was then compared to a duplicate lens system that was constructed theoretically in the same diameter as the 3-mm prototype. The results show that the prototype yields 4/7 of the SDE of the theoretical model. However, the SDE of the prototype provides sufficient SDE, in a viewing range of 1 to 2.5 cm from the lens, for minimally invasive surgery.

Paper Details

Date Published: 4 October 2012
PDF: 6 pages
Opt. Eng. 51(10) 103202 doi: 10.1117/1.OE.51.10.103202
Published in: Optical Engineering Volume 51, Issue 10
Show Author Affiliations
Sam Y. Bae, California Institute of Technology (United States)
Ronald J. Korniski, California Institute of Technology (United States)
John M. Choi, California Institute of Technology (United States)
Michael Shearn, California Institute of Technology (United States)
Poyan Bahrami, California Institute of Technology (United States)
Harish M. Manohara, California Institute of Technology (United States)
Hrayr K. Shahinian, Skull Base Institute (United States)

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