Laser alignment system with modulated field

Details Laser alignment system with modulated field Laser alignment system with modulated field

1987-01-27

1988-07-12

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356152, 356400, G01B 1126, G01C 308

Patent

active

047566175

ABSTRACT:
A laser alignment system includes a transmitter and one or more receivers. The transmitter produces an alignment field by projecting laser energy in a non-planar reference cone, and the receivers locate this reference cone with photodetectors. The laser energy in the alignment field is modulated at 8 kHz and the signals produced by the photodetectors are filtered and amplified to increase the range of the system. Each receiver operates a display which indicates when it is aligned in the reference cone, and it produces an out-of-level indication when the transmitter is not properly aligned.

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