Bi-curvature lens for light emitting diodes and photo detectors

Details Bi-curvature lens for light emitting diodes and photo detectors Bi-curvature lens for light emitting diodes and photo detectors

2007-09-18

2007-09-18

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

Plural focal length

C359S708000, C362S326000, C362S332000, C362S335000

Reexamination Certificate

active

11074883

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.

REFERENCES:
patent: 4740259 (1988-04-01), Heinen
patent: 2004/0126064 (2004-07-01), Vandentop et al.
patent: 0 813 079 (1998-01-01), None
patent: 1251366 (2002-10-01), None
patent: 1 453 108 (2004-09-01), None
patent: 2-106056 (1990-04-01), None
patent: 2001-281541 (2001-10-01), None
UK Search Report dated Jul. 4, 2006 involving counterpart UK application No. GB0604476.2.

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