Lens system installed in mobile communication terminal

Details Lens system installed in mobile communication terminal Lens system installed in mobile communication terminal

2005-01-18

2005-01-18

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S735000, C359S689000, C359S740000, C359S784000

Reexamination Certificate

active

06844989

ABSTRACT:
Disclosed is a lens system installed in a mobile communication terminal, comprising: a first lens including at least one aspherical plane and having a positive refractivity; a perforated iris separated from the first lens by a designated distance for preventing unnecessary incident light from being incident onto an optical system; a second lens separated from the perforated iris by a designated distance, including at least one aspherical plane and having a positive refractivity; and a third lens separated from the second lens by a designated distance, including at least one aspherical plane and having a negative refractivity, wherein the first lens, the perforated iris, the second lens and the third lens are arranged sequentially from a subject, and the perforated iris is located between the first lens and the second lens.

REFERENCES:
patent: 4540249 (1985-09-01), Mogami
patent: 5071235 (1991-12-01), Mori et al.
patent: 5087988 (1992-02-01), Nakayama
patent: 5760966 (1998-06-01), Tanaka et al.
patent: 2002-64179 (2002-08-01), None

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