Focusing position detecting and automatic focusing apparatus wit

Details Focusing position detecting and automatic focusing apparatus wit Focusing position detecting and automatic focusing apparatus wit

1992-11-09

1993-08-10

Adams, Russell E.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

354402, 2502011, G03B 1336

Patent

active

052353753

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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Patent Abstracts of Japan, vol. 10, No. 341, Nov. 18, 1986.
Patent Abstracts of Japan, vol. 11, No. 212, Jul. 9, 1987.

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