Development of a miniature single lens dual-aperture stereo imaging system towards stereo endoscopic imaging application

作者：Bae Sam Y^*; Korniski Ron J; Choi John M; Shearn Michael; Bahrami Poyan; Manohara Harish; Shahinian Hrayr K

来源：Optical Engineering, 2012, 51(10): 103202.

DOI：10.1117/1.OE.51.10.103202

• dual aperture
• dual lens
• stereo endoscope
• disparity
• stereoscopic depth effect
• depth perception

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.

• 出版日期2012-10