Automatic focus adjusting device
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United States of America Patent
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Dec 1, 1981
Issued Date -
N/A
app pub date -
Jul 12, 1979
filing date -
Dec 10, 1976
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved automatic focusing system for an optical instrument includes a scanner driven oscillatably across an angle to detect a subject positioned between infinity and the minimum focus condition of the objective lens of the optical instrument. The scanner is adjusted in response to the focus condition of the lens to align the bisector of the angle scanned with the subject when the lens is in perfect focus by electronic and mechanical interconnecting feedback means between the objective lens focusing ring and the scanning system.
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