Infrared beam steering system using diffused infrared light and

Details Infrared beam steering system using diffused infrared light and Infrared beam steering system using diffused infrared light and

1993-06-04

1996-06-18

Sikes, William L.

Optical: systems and elements

Holographic system or element

Having optical element between object and recording medium

359 54, 359159, 250351, G02F 113, H04B 1024

Patent

active

055283918

ABSTRACT:
A system for scanning a room to find the location of target devices, and then locking onto them with stationary directed beams for two-way communication. In one embodiment, a base system in each room comprises an IR source/receiver combination plus an LCD display panel which covers the source/receiver and is addressed in such a way as to open up dynamic apertures through which IR radiation in a scanning mode can be directed toward any particular location in the room. When a device at that location senses that it is being irradiated by the base station, the targeted device responds by emitting a coded packet of IR pulses. This system takes advantage of the higher bandwidth communication that can be obtained with point-to-point communications, while still allowing for multiple devices at arbitrary locations in the same room.

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T. L. Miller, Liquid Crystal Devices Free Space Optical Communications, SPIE, vol. 1059, Space Sensing, Communications, and Networking (1989), pp. 154-161.
K. M. Flood et al., Continuous Wide Angle Beam Steering Using Translation of Binary Microlens Arrays and A Liquid Crystal Phased Array, SPIE, vol. 1211, Computer and Optically Formed Holographic Optics (1990), pp. 296-304.

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