Compact fisheye objective lens

Details Compact fisheye objective lens Compact fisheye objective lens

2011-01-11

2011-01-11

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

Reverse telephoto

C359S752000

Reexamination Certificate

active

07869141

ABSTRACT:
A compact fisheye objective lens comprising a series of six lens elements arranged on an optical axis to focus an image on an image plane, the compact fisheye objective lens having a first lens element with a convex object surface that faces the object and a concave image surface that faces image plane, and a second lens element spaced to the right of the first lens element concave image surface, the second lens element having a concave object surface and a concave image surface. The compact fisheye objective lens having singlet third and fourth lens elements, the fifth and sixth lens elements being combined to form a doublet having a positive power.

REFERENCES:
patent: 5477389 (1995-12-01), Ito et al.
patent: 6687061 (2004-02-01), Sensui
patent: 6987623 (2006-01-01), Shibayama
patent: 7280289 (2007-10-01), Yamakawa
patent: 7286302 (2007-10-01), Ohzawa et al.
patent: 2005/0219715 (2005-10-01), Kimura et al.
patent: 2008/0291542 (2008-11-01), Yamamoto

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