Zoom lens and photographing system

Details Zoom lens and photographing system Zoom lens and photographing system

2005-11-15

2005-11-15

Spector, David N. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C396S080000

Reexamination Certificate

active

06965481

ABSTRACT:
In a zoom lens in/from which a magnification changing optical unit for changing an overall focal length of the zoom lens can be inserted/removed, wherein a wobbling unit which can be slightly amplitude-driven in an optical axis direction to detect a best imaging position is placed closer to an image side than an insertion position of said magnification changing optical unit.

REFERENCES:
patent: 5138492 (1992-08-01), Hamano et al.
patent: 5521758 (1996-05-01), Hamano
patent: 5758206 (1998-05-01), Imaoka
patent: 5771123 (1998-06-01), Hamano
patent: 5786853 (1998-07-01), Ohkawara et al.
patent: 1 220 001 (2002-03-01), None
Patent Abstracts of Japan, Publication No. 02 210975, Publication Date Aug. 22, 1990.
Patent Abstracts of Japan, Publication No. 04 078808, Publication Date Mar. 12, 1992.
European Search Report, Mar. 27, 2002, Application EP 0131 0870.

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