Optical device, control method therefor, and program for...

Details Optical device, control method therefor, and program for... Optical device, control method therefor, and program for...

2011-01-18

2011-01-18

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

With support

C359S697000

Reexamination Certificate

active

07872814

ABSTRACT:
An optical device which makes it possible to reduce time for extending lens units while avoiding collision between lens units during a lens units-extending operation. A first-group barrel is driven by a DC motor. A second-group barrel provided rearward of the first-group barrel on the optical axis is driven by a stepping motor. Photointerrupters detect an intermediate position of the first-group barrel between its retracted position and its shooting position located forward of the retracted position. A control unit controls the DC motor and the stepping motor such that extension of the first-group barrel forward from the retracted position is started, and after the intermediate position is detected by the photointerrupters, extension of the second-group barrel is started.

REFERENCES:
patent: 6370332 (2002-04-01), Kubo
patent: 2006/0182432 (2006-08-01), Yumiki
patent: 2601425 (1997-01-01), None
patent: 2000-194046 (2000-07-01), None

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