Infrared network transceiver apparatus

Details Infrared network transceiver apparatus Infrared network transceiver apparatus

1991-05-16

1993-03-02

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359152, H04B 1000

Patent

active

051914611

ABSTRACT:
The present invention is for an illumination transmitter. The transmitter projects a signal onto a planar reflective surface such as the ceiling of an open office environment. The transmitter includes a plurality of illumination sources positioned in a line wherein the line has a predetermined orientation to the planar surface. The illumination sources are preferably infrared LEDs. The transmitter has means for jointly aiming the illumination sources toward a desired location on the planar surface. The location on the planar surface is usually used to allow multiple transmitters coupled to infrared receivers to allow communication between computers in a LAN. The transmitter also includes means for maintaining the predetermined orientation between the planar surface and the line. The orientation is usually parallel to allow transmitters located large distances from the illumination to project a relatively small illumination spot onto the planar surface.

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