Laser operation for survey instruments

Details Laser operation for survey instruments Laser operation for survey instruments

2008-01-29

2008-01-29

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C372S030000, C356S005010

Reexamination Certificate

active

07323670

ABSTRACT:
The performance of a laser scanner is optimized in the field by automatically determining appropriate laser parameters for the scan location. A laser control system uses information such as the environmental temperature to select an appropriate range of start points for various laser parameters, such as pump temperature and laser currents. Test pulses over that range can be used to determine optimal operating parameters. In order to also meet safety regulations, the laser control system can use information such as range and pulse timing information to fire regularly spaced pulses that do not exceed acceptable exposure limits. Alternatively, the laser can be operated at a regular speed of about 24 Hz, or can be operated in burst mode where a burst of pulses creates what appears to be a brighter scan spot, but the time delay between bursts allows time for a blink reflex.

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