Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-01-29
1992-12-15
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356387, G01B 1124
Patent
active
051720019
ABSTRACT:
System to automatically compensate the transversal oscillation of the scanning plane in a laser scanner used for profile measurement, by means of a special device.
The invention concerns a system which automatically compensates the transversal oscillation of the scanning plane in a laser scanner used for profile measurement, by means of a device consisting in a triangular plane (1) integral with the gage, or by a mask photoengraved onto a plane-parallel glass plate (which is the last element of the optical chain) or onto the main lens, or by a pin in the shape of a truncated cone integral with the gage, or by opto-electronic components of different kind, such as, for example, multiple-element photo-sensitive devices, analogical photo-sensitive position sensors, linear arrays of photodiodes, etc.
This system allows to determine the precise position of the scanning plane in comparison with the piece to be gaged, compensation achieved by means of one of the above-mentioned mechanical and opto-electronic devices.
REFERENCES:
patent: 4758729 (1988-07-01), Monnin
patent: 4794262 (1988-12-01), Sato et al.
Aeroel S.R.L.
Allen S.
Nelms David C.
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