Optical system, and optical apparatus

Details Optical system, and optical apparatus Optical system, and optical apparatus

2005-08-02

2005-08-02

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Lens

Annular zonal correcting

C359S290000, C359S578000, C349S001000

Reexamination Certificate

active

06924944

ABSTRACT:
The invention relates to an optical system that can be operated with low power consumptions, reduced noises and fast responses, is simplified in mechanical structure and of reduced outer diameter and compact size, and is capable of focusing and zooming. This optical system comprises a rotationally symmetric lens group and an optical element having variable optical properties, whereby focusing or zooming can be performed. Focusing or zooming can be performed by use of a plurality of optical elements having variable optical properties, wherein at least one of the optical elements is configured to a free-form surface shape.

REFERENCES:
patent: 6147789 (2000-11-01), Gelbart
patent: 6166784 (2000-12-01), Murata et al.
patent: 2002/0118464 (2002-08-01), Nishioka et al.
patent: 2003/0035605 (2003-02-01), Bouevitch et al.
patent: 2003/0147146 (2003-08-01), Mikami
patent: 0 961 149 (1999-05-01), None
patent: 2000-0281570 (2000-03-01), None

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