Zoom lens

Details Zoom lens Zoom lens

2005-05-24

2005-05-24

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S676000

Reexamination Certificate

active

06898023

ABSTRACT:
The present invention provides a small, thin, light and low cost zoom lens suitable for cellular telephones, portable information terminals, etc. In particular, it can provide a small and thin, high performance zoom lens having a zoom ratio of approximately 2, a depth of less than 9 mm during shooting and in storage, a total lens length of less than 30 mm, an angle of view of approximately 61°, and a F number of approximately 2.8 providing a sufficient light, with various aberrations all suitably corrected.

REFERENCES:
patent: 5648835 (1997-07-01), Uzawa
patent: 6339508 (2002-01-01), Nozawa et al.
patent: 20030179464 (2003-09-01), Amanai
patent: 20030214726 (2003-11-01), Mihara
patent: 09-211287 (1997-08-01), None
patent: 2000-187160 (2000-07-01), None
Patent Abstracts of Japan for JP09-211287 published on Aug. 15, 1997.
Patent Abstracts of Japan for JP2000-187160 published on Jul. 4, 2000.

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