Image-forming lens set

Details Image-forming lens set Image-forming lens set

2008-05-06

2008-05-06

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S784000

Reexamination Certificate

active

11402954

ABSTRACT:
An image-forming lens set includes a first lens, a second lens, an aperture and a third lens arranged orderly from an objective side toward an image side in sequence. The first lens is made of plastic material and has a positive diopter and two opposite surfaces including a convex surface facing the image side. The second lens is made of plastic material and has a negative diopter and two opposite surfaces including a concave surface facing the image side. The third plastic lens is made of plastic material and has a positive diopter and two opposite surfaces including a convex surface facing the image side.

REFERENCES:
patent: 5071235 (1991-12-01), Mori et al.
patent: 5654826 (1997-08-01), Suzuki
patent: 6141084 (2000-10-01), Kitahara
patent: 6259508 (2001-07-01), Shigematsu
patent: 6532342 (2003-03-01), Yoneyama

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