Spectrometer, Cancer, Breast
Wednesday, September 20, 2006
A multichannel Spectrometer for Breast Cancer detection has been designed and developed utilizing a unique holographic transmission grating. The grating contains a photosensitive gel material with periodic index of refraction. Reduced light scattering results because of the gel material, fewer edges are exposed. This type of holographic grating provides refraction throughout the gel material volume with more light reaching the photodetector. Spectral efficiency of 80 percent and a spectral wavelength range from 500nm to 1100nm has been achieved.
Light illumination passes through the breast over a few centimeters and measurements are taken at several locations. The light beam leaving the breast is collimated and imaged onto the grating. A CCD camera collects spectral signals from the grating’s refracted light beam. This configuration allows the imaging of several light beams channel simultaneously in real time.
Source: Photonics Spectra, April 2003
Reference: Lothar Lilge, Ontario Cancer Institute, Prince Margaret Hospital, Toronto, Canada; Ph: 416-946-4501, Ext. 5743; Olga Pawluczuk, P&P Optica Inc., Kitchener, Ontario, Canada,
Industrial Products
posted by JD52 @ 8:29 PM,
