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US 7,411,747 B2Granted
Infrared laser light source spreader
AssigneeCamdeor Technology Co., Ltd.
InventorSung-Ken Lin
Life of this patent
Estimating the term…
Abstract
An infrared laser light source spreader has a first biconvex lens, a biconcave lens, a convex-concave lens, and a second biconvex lens. Light from an infrared laser light source is emitted incident to the first biconvex lens, spreads and exits to be incident on the biconcave lens, is further spread and inverted by the biconcave lens, exits to be incident on the convex-concave lens, which collimates the light, and becomes incident on the second biconvex lens, which spreads the light further.
Claims8
An infrared laser light source spreader comprising:
- a first biconvex lens;
- a convex-concave lens;
- and
- a biconcave lens disposed between the first biconvex lens and the convex-concave lens;
- wherein the first biconvex lens has a first radius of curvature in a range from 17.45 mm to 21.14 mm, a second radius of curvature in a range from 20.49 mm to 48.42 mm, and a center thickness in a range from 3.37 mm to 3.95 mm;
- the biconcave lens has a first radius of curvature in a range from 10.10 mm to 14.55 mm, a second radius of curvature in a range from 19.91 mm to 45.54 mm, and a center thickness of 1.85 mm;
- the convex-concave lens has a first radius of curvature in a range from 35.22 mm to 68.31 mm, a second radius of curvature in a range from 14.04 mm to 20.42 mm, and a center thickness in a range from 2.28 mm to 3.47 mm;
- and the first biconvex lens and the biconcave lens are separated by a distance in a range from 3.32 mm to 4.20 mm, the biconcave lens and the convex-concave lens are separated by a distance in a range from 2.99 mm to 4.52 mm.
5 more elements
Dependencies are inferred from the claim text.