Virtual reality system with an optical position-sensing facility

Details Virtual reality system with an optical position-sensing facility Virtual reality system with an optical position-sensing facility

1996-12-20

1998-12-01

Hellner, Mark

Optics: measuring and testing

Angle measuring or angular axial alignment

Relative attitude indication along 3 axes with photodetection

3561413, G01B 1126

Patent

active

058446745

ABSTRACT:
A virtual reality system permanently connected with a device to be worn by a user is disclosed which has an optical position-sensing facility that contains at least one radiation source defining a fixed reference point in space and an optical receiving system permanently connected with the device. The optical receiving system includes three radiation detectors, whose optical axes are parallel to each other. The first radiation detector has a reception pattern which shows a rising/falling sensitivity characteristic in a first angular range. The second radiation detector has a reception pattern which shows a rising/falling sensitivity characteristic in a second angular range. The third radiation detector has a reception pattern which shows a slowly varying sensitivity characteristic within at least the first and second angular ranges.

REFERENCES:
patent: 5023943 (1991-06-01), Heberle
patent: 5187540 (1993-02-01), Morrison
patent: 5577981 (1996-11-01), Jarvik

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