Laser receiver

Details Laser receiver Laser receiver

2006-04-04

2006-04-04

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S208500, C356S004060, C356S004070, C356S623000

Reexamination Certificate

active

07022963

ABSTRACT:
A laser receiver for detecting the position of incidence of a beam of laser light thereon includes a first photodetector and a second photodetector aligned in series with each other and spaced apart from each other by a gap. If the laser is evenly distributed between the two photodetectors, then the laser position will be set as the correct position and a corresponding signal will be displayed. However, if the first photodetector detects more light than the second photodetector, then a signal will also be displayed to inform the user that more laser is being projected onto the first photodetector. On the other hand, if the second photodetector detects more light than the first photodetector, then a signal will be displayed to inform the user that more laser being projected onto the second photodetector. These signals will assist users to adjust the laser receiver to accurately position the laser.

REFERENCES:
patent: 4761546 (1988-08-01), Ikari et al.
patent: 4769533 (1988-09-01), Groschl et al.
patent: 5448054 (1995-09-01), Massey
patent: 6308428 (2001-10-01), Creighton, III
patent: 6337473 (2002-01-01), Yamazaki et al.
patent: 6396570 (2002-05-01), Takayanagi et al.
patent: 6747266 (2004-06-01), Yamazaki et al.
patent: 6750953 (2004-06-01), Douglas

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