Focusing position detecting and automatic focusing apparatus with optimal focusing position calculation method
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United States of America Patent
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Aug 10, 1993
Issued Date -
N/A
app pub date -
Nov 9, 1992
filing date -
Apr 12, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A driving section relatively drives an optical system and an object in a direction of an optical axis of the optical system. An information detecting section detects information of the object obtained by the optical system. A focusing position detecting section detects evaluation values representing in-focus states of a plurality of positions in a focusing position and positions near the focusing position, in response to a plurality of focusing position calculation methods different from each other, based on the information of said object respectively. An initializing section initializes an optimal focusing position calculation method, of the plurality of focusing position calculation methods, which is most suitable for a focusing operation of the object.
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