Image taking lens

Details Image taking lens Image taking lens

2008-12-23

2010-12-14

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S793000

Reexamination Certificate

active

07852573

ABSTRACT:
An image taking lens LA comprises an aperture S1, a first lens L1and a second lens L2which are arranged in this order from an object side to an image side. The first lens L1has a positive power and a meniscus shape with a convex surface facing an object; and the second lens L2has a positive power with a convex surface facing an image. The first lens L1and the second lens L2satisfy the following formulae (1) and (2):in-line-formulae description="In-line Formulae" end="lead"?0.30<R1/R2<0.65  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.30<d3/F<0.50  (2)in-line-formulae description="In-line Formulae" end="tail"?This image taking lens formed of the two lenses is small in size and has a high optical performance, in which the entire image taking lens has a short focal length.

REFERENCES:
patent: 5798872 (1998-08-01), Uzawa
patent: 7167324 (2007-01-01), Saito
patent: 7372639 (2008-05-01), Kim
patent: 2007/0053072 (2007-03-01), Nanba
patent: 2005-121685 (2005-05-01), None
patent: 2006-350275 (2006-12-01), None

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