Graduation Year

2010

Document Type

Thesis

Degree

M.S.

Degree Granting Department

Physics

Major Professor

Dennis K. Killinger, Ph.D.

Co-Major Professor

Myung K.Kim, Ph.D

Committee Member

Dale Johnson, Ph.D

Keywords

LED illuminator, Optical reflectors, Beam shaping, Intensity distribution, Ray tracing simulation, CMOS/CCD camera and lens

Abstract

The optical design of a LED illuminator and camera imaging system were studied for potential use in a small medical "robotic type" probe to be used for minimally invasive abdominal surgery. Beam shaping optical reflectors were studied to increase the intensity distribution of the LED beam directed toward a close-by target surface. A CMOS/CCD camera and lens was used to image the targeted area. In addition, extensive optical ray tracing simulations were made to predict the intensity patterns. The experimental measurements and ray tracing simulations were in good agreement, and indicated that 20 degree cone reflectors for the LED sources and appropriate micro-lens/CCD chip imaging optics should provide a useful image at a working distance of about 5 cm.

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