Optical communications – Receiver
Reexamination Certificate
2006-05-02
2006-05-02
Mullen, Thomas (Department: 2632)
Optical communications
Receiver
C250S208200, C398S208000, C398S212000
Reexamination Certificate
active
07039326
ABSTRACT:
A communication system including an infrared receiver that receives optical infrared signals. The infrared receiver utilizes an array of photo-sensors for detecting optical infrared signals within a solid angle. Each photo-sensor, however, detects optical infrared signals in only a predetermined portion of the solid angle. On detecting optical infrared signals, each photo-sensor converts and forwards a corresponding electrical signal to a filter circuit that selectively determines whether the signal meets a predetermined criteria such as a frequency threshold. The filter circuit or other processing circuitry is thereby able to identify photo-sensor(s) providing an optimal infrared communication link. The infrared receiver may include an optical system comprising a lens assembly that directs the optical infrared signals towards the array of photo-sensors. In one embodiment, the lens assembly employs a diffused lens having an imperfect focus to facilitate the detection of optical infrared signals emanating from transmitters that have a relatively small solid angle.
REFERENCES:
patent: 3987297 (1976-10-01), Brienza et al.
patent: 5103108 (1992-04-01), Crimmins
patent: 5355242 (1994-10-01), Eastmond et al.
patent: 5557443 (1996-09-01), Nakamura et al.
Ersmarker and Nilsson, “Tjoreven—Wireless computer communication in local networks—Master's Thesis,” Feb. 18, 1998.
Williams et al., “Infrared Data Association, Serial Infrared Link Access Protocol (IrLAP),” Infrared Data AssociationSM, Version 1.1, Jun. 16, 1996.
ESS Technology, Inc.
Farjami & Farjami LLP
Mullen Thomas
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