Light detecting and measuring devices

Details Light detecting and measuring devices Light detecting and measuring devices

H - Electricity

04

N

350/38, 178/3.2

H04N 9/04 (2006.01) G01J 1/04 (2006.01) H04N 1/48 (2006.01) H04N 9/11 (2006.01)

Patent

CA 1194985

-0- IMPROVEMENTS IN OR RELATING TO LIGHT DETECTING AND MEASURING DEVICES ABSTRACT OF THE DISCLOSURE A color scanner for scanning a color transparency includes a beam splitter located so as to receive light transmitted through the scanned trans- parency. Some of this light is scattered by scratches and dirt specks on the transparency. Such scattered light is contained and directed through the beam splitter by internally reflective optical path defining means including mirror boxes and/or lenses located between the trans- parency and the exits of the beam splitter. Additional mirror boxes and/or lenses may be positioned between the exits of the beam splitter and respective photo- multipliers to ensure that all the scattered light is detected.

420972

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