title: Compact dual-view endoscope without field obscuration.
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.
authors.affiliation: University of Arizona, College of Optical Sciences, 1630 East University Boulevard, Tucson, Arizona 85721.
authors.forename: Rajender
authors.initials: R
authors.lastname: Katkam
authors.affiliation: University of Arizona, College of Optical Sciences, 1630 East University Boulevard, Tucson, Arizona 85721bUniversity of Arizona, College of Medicine, 1501 North Campbell Avenue, Tucson, Arizona 85724cUniversity of Arizona, Department of Biomedical Enginee.
authors.forename: Bhaskar
authors.initials: B
authors.lastname: Banerjee
authors.affiliation: University of Arizona, College of Optical Sciences, 1630 East University Boulevard, Tucson, Arizona 85721.
authors.forename: Chih Yu
authors.initials: CY
authors.lastname: Huang
authors.affiliation: University of Arizona, College of Optical Sciences, 1630 East University Boulevard, Tucson, Arizona 85721.
authors.forename: Xiaoyin
authors.initials: X
authors.lastname: Zhu
authors.affiliation: University of Arizona, College of Medicine, 1501 North Campbell Avenue, Tucson, Arizona 85724.
authors.forename: Luis
authors.initials: L
authors.lastname: Ocampo
authors.affiliation: University of Arizona, Department of Biomedical Engineering, 1127 East James E. Rogers Way, Tucson, Arizona 85721.
authors.forename: Jerri-Lynn
authors.initials: JL
authors.lastname: Kincade
authors.affiliation: University of Arizona, College of Optical Sciences, 1630 East University Boulevard, Tucson, Arizona 85721.
authors.forename: Rongguang
authors.initials: R
authors.lastname: Liang
mesh_terms: D003113:Colonoscopy; D017076:Computer-Aided Design; D019723:Endoscopes; D004724:Endoscopy / Q000295:instrumentation* / Q000379:methods*; D004867:Equipment Design; D006801:Humans; D008954:Models, Biological