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US 8,941,913 B2Granted
Infrared optical lens system
AssigneeSamsung Techwin Co., Ltd.
InventorsMi-won Kang, Byoung-guy Lee
Life of this patent
Estimating the term…
Abstract
Provided is an infrared optical lens system including: a first lens having negative refractive power; and a second lens having positive refractive power, wherein the first lens and the second lens are disposed in this order from an object side to an image side.
Claims17
An infrared imaging optical lens system comprising:
- a first lens having negative refractive power and being formed of a material comprising germanium;
- and
- a second lens having positive refractive power and being formed of a material comprising germanium,
- wherein the first lens and the second lens are disposed in this order from an object side to an image side,
- wherein the total number of lenses of the infrared imaging optical lens system is two,
- wherein lights incident on the first lens at specific angles are collected at a point of an image sensor,
- wherein each of the first lens and the second lens has a convex surface facing the image side, and
- wherein a back focal length of the infrared optical lens system is equal to or greater than 20 mm.
5 more elements
Dependencies are inferred from the claim text.