Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1988-12-19
1990-06-19
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
354403, 356376, G01C 300, G01C 500
Patent
active
049348108
ABSTRACT:
The invention relates to a method and apparatus for controlling the quantity of emitted light in an optical measuring head. The control of the emitted light quantity of a laser diode mounted in the optical measuring head is dependent upon the stray light characteristics of the workpiece and is achieved by controlling the pulse width of the laser diode. The light pulses are synchronized with the machine clock frequency of the coordinate measuring apparatus on which the measuring head is fixedly mounted such that the center of the pulse coincides always with the counter strobe of the measuring system of the coordinate measuring apparatus.
REFERENCES:
patent: 3612890 (1971-10-01), Cornyn et al.
patent: 4375921 (1983-03-01), Morander
patent: 4521106 (1985-06-01), Lambeth
patent: 4522492 (1985-06-01), Masunaga
patent: 4587622 (1986-05-01), Herzog
patent: 4639140 (1987-01-01), Lerat
patent: 4674869 (1987-06-01), Pryor et al.
patent: 4708483 (1987-11-01), Lorenz
Ballmer Horst
Kammleiter Berndt
Koch Klaus-Peter
Nagele Ulrich
Buczinski Stephen C.
Carl-Zeiss-Stiftung
Ottesen Walter
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