Patent Number: 7,271,963

Title: Bi-curvature lens for light emitting diodes and photo detectors

Abstract: A bi-curvature lens for diodes in an infrared wireless communication transceiver is disclosed. Devices having such a bi-curvature lens, such as a light emitting device, a light detecting device, and a transceiver are also disclosed. A method for designing such a lens, and a method for fabricating a device having such a lens are also disclosed. The bi-curvature lens disclosed has a bottom hemispherical portion and a top aspherical portion. Light emitting diodes and photo detectors used in conjunction with bi-curvature lenses display symmetrical radiation intensity profiles, in accordance with Infrared Data Association standards and protocols.

Inventors: Saxena; Kuldeep Kumar (Singapore, SG), Tan; Wee Sin (Singapore, SG), Ng; Peng Yam (Singapore, SG), Lim; Sin Heng (Singapore, SG)

Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.

International Classification: G02B 3/10 (20060101); F21V 5/00 (20060101); F21V 5/04 (20060101); G02B 3/02 (20060101)

Expiration Date: 2019-09-18 0:00:00