Infrared wink ranging system

Details Infrared wink ranging system Infrared wink ranging system

G - Physics

03

B

88/121, 95/53.4

G03B 13/20 (2006.01) G02B 7/32 (2006.01) G03B 7/16 (2006.01) G03B 15/05 (2006.01)

Patent

CA 1298129

7277 INFRARED WINK RANGING SYSTEM ABSTRACT OF THE DISCLOSURE A black, infrared pass filter is disposed in front of the strobe element of an automatic rangefinding camera to provide an infrared ranging wink for ranging during the pre-exposure steps of a camera cycle. As the cycle continues, the filter is temporarily displaced from in front of the strobe element to allow a visible light, flash firing for scene illumination. Once the exposure firing is complete, the filter resumes its original posi- tion in front of the strobe element such that the filter allows only infrared light to be transmitted from the strobe element except during exposure strobe firing.

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