Image-taking optical system

Details Image-taking optical system Image-taking optical system

2005-05-18

2009-02-03

Ho, Tuan V (Department: 2622)

Television

Camera, system and detail

Optics

C348S360000, C359S648000

Reexamination Certificate

active

07486327

ABSTRACT:
There is provided an image-taking optical system to form an image in a solid-state image pickup element. The image-taking optical system comprises an aperture stop, a positive first lens having a convex surface on an object side, a positive second lens having a convex surface on an image side, and a negative third lens L3having a concave surface on the image side provided in this order from the object side. In addition, a conditional expression: 0.71<f1/f2<1.1 (f1: focal length of the first lens, and f2: focal length of the second lens) is satisfied.

REFERENCES:
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patent: 2-191907 (1990-07-01), None
patent: 4-153612 (1992-05-01), None
patent: 5-188284 (1993-07-01), None
patent: 05188284 (1993-07-01), None
patent: 9-288235 (1997-11-01), None

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