Lens drive apparatus, lens system and lens-operation...

Details Lens drive apparatus, lens system and lens-operation... Lens drive apparatus, lens system and lens-operation...

2007-07-24

2009-08-04

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

With support

C359S823000

Reexamination Certificate

active

07570441

ABSTRACT:
A lens drive apparatus is disclosed which is capable of optionally restricting the range of manual operations without reducing operability and usability of a lens apparatus. The apparatus includes an electric driving switch for instructing electric drive of an operation member, a clutch provided in a power transmission path from a motor to the operation member, a position detector detecting the position of the operation member, a range setter setting a permissible movement range of the operation member, and a controller. When the detected position by the position detector changes from the inside of the permissible movement range to the outside thereof in a non-motor-driven state, the controller controls the clutch so that a load on the movement of the operation member is increased in comparison with a case where the detected position is within the permissible movement range.

REFERENCES:
patent: 7242645 (2007-07-01), Takahashi et al.
patent: 04-329505 (1992-11-01), None
patent: 2001-290070 (2001-10-01), None
patent: 2004-102000 (2004-04-01), None
patent: 2005-018035 (2005-01-01), None

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