Reference
Katkam R, Banerjee B, Huang CY, Zhu X, Ocampo L, Kincade J-L, Liang R. 2015. Compact dual-view endoscope without field obscuration. J Biomed Opt. 20:76007. doi:10.1117/1.JBO.20.7.076007.
Abstract
We have developed a compact dual-view endoscopic probe without field obscuration to address the need of simultaneously observing forward and backward fields of view (FOVs) in the colon. The objective is compact with the forward-view and rear-view optical paths sharing the same optical elements. The compact objective is new in that no FOV is blocked. The illumination for forward-view imaging is provided by the cylindrical light guide and backward illumination is achieved with a reflector. We have designed, prototyped, and tested the endoscope by comparing it to a standard clinical colonoscope. We will discuss the system concept, objective design, fabrication of the freeform lens, and test results.