Bubble macro mode lens

Details Bubble macro mode lens Bubble macro mode lens

2006-08-08

2006-08-08

Perkey, W. B. (Department: 2851)

Photography

With exposure objective focusing means, focusing aid, or...

C396S072000, C348S345000, C359S665000

Reexamination Certificate

active

07088917

ABSTRACT:
A lens system has an optical path through a lens that is in contact with a liquid. The focal length of the lens system can be changed through introduction of a bubble in the optical path at the lens-liquid interface. The bubble changes the refractive index difference at the lens surface and thereby changes the focal length of the lens system. In a camera, the lens system can operate in a macro mode corresponding to a shorter focal length or a normal mode corresponding to a longer focal length.

REFERENCES:
patent: 4536061 (1985-08-01), Nishimura
patent: 4615580 (1986-10-01), Mayer
patent: 5066301 (1991-11-01), Wiley
patent: 5443506 (1995-08-01), Garabet
patent: 6904192 (2005-06-01), Schroeder et al.
patent: 2004/0227838 (2004-11-01), Atarashi et al.

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