Emission from an infrared diode (48) is collimated (50) and reflected from the cornea, returning through a semitransparent mirror (53) to an enlarging lens (44), pentagonal prism (40), compensating prism (59), diminishing lens (60) and CCD image sensor (63) in optical conjugation with the pupil of the eye (45). The video signal is amplified (65), digitised (66) and corrected by subtraction (67) of error signals previously SlOr in 0M . The COFFCC Sil iS StgF ) temporarily and used to drive a selected CCD (71,72 or 73) corresp. to the direction of viewing. ADVANTAGE - Accuracy is enhanced by elimination of detrimental interference signals produced by optical systems.
Line=of=sight recognition device for photographic viewfinder - uses corrected video data from corneal reflection to address selected imager corresp. to focus recognition zone