Imaging optical system with focusing function

Details Imaging optical system with focusing function Imaging optical system with focusing function

2007-11-27

2007-11-27

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

Fluid

C359S796000

Reexamination Certificate

active

11261617

ABSTRACT:
An imaging optical system is provided and has a focusing section including a cemented lens (first and second lenses), which includes first and second fluid materials having different refractive indices from each other; and whose cemented surface shape can be electrically controlled. A refractive index Nd1of the first fluid material, a refractive index Nd2of the second fluid material, a minimum value RA of a radius of curvature of the cemented surface of the cemented lens, a focal length fa of the whole cemented lens, and a focal length f of the whole lens system satisfy the conditions specified in the specification.

REFERENCES:
patent: 6344930 (2002-02-01), Kaneko et al.
patent: 2005/0200973 (2005-09-01), Kogo et al.
patent: 2006/0056042 (2006-03-01), Kim et al.
Philips Research Press Release, “Philips' Fluid Lenses Bring Things into Focus”, Mar. 3, 2004, on the Internet URL:http://www.research. philips.com
ewscenter/archive/2004/fluidfocus.html).

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