Zoom and focus control method and system

Details Zoom and focus control method and system Zoom and focus control method and system

2006-01-31

2006-01-31

Perkey, W. B. (Department: 2851)

Photography

Having variable focal length of camera objective

Having focus operation

C396S082000, C396S087000, C359S691000, C359S693000, C359S698000

Reexamination Certificate

active

06993256

ABSTRACT:
A focus lens and a zoom lens group having a first zoom lens and a second zoom lens are controlled separately from one another in an internal-focus camera. The positions of the focus lens and the second zoom lens in the zoom lens group are tracked, and are controlled to approach no closer to one another than a minimum safe distance to avert collisions between the focus lens and the second zoom lens.

REFERENCES:
patent: 4161756 (1979-07-01), Thomas
patent: 4827296 (1989-05-01), Haraguchi et al.
patent: 6714731 (2004-03-01), Ogg et al.
patent: 2001-033683 (2001-02-01), None
English language translation of Fujii, JP 11-28169.
English language translation of Takaoka, JP 2001-033683.

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