Lens position detecting device and lens position detecting...

Details Lens position detecting device and lens position detecting... Lens position detecting device and lens position detecting...

2011-08-16

2011-08-16

Hasan, Mohammed (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S698000

Reexamination Certificate

active

08000029

ABSTRACT:
A lens position detecting device includes a lens, a lens driver for moving the lens in the optical axis direction, a lens drive command unit for outputting a drive command to the lens driver, a position detector for detecting that the lens is located at a predetermined position, and a first reference position detector that moves the lens to a first position upon starting a detecting operation, receives an output signal from the position detector while moving the lens in one direction along the optical axis direction from the first position, and detects a reference position of the lens based on the output signal.

REFERENCES:
patent: 4412737 (1983-11-01), Iwanade et al.
patent: 5144491 (1992-09-01), Ushiro et al.
patent: 5179409 (1993-01-01), Kazami et al.
patent: 5847874 (1998-12-01), Sasao et al.
patent: 2001-324664 (2001-11-01), None

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