Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-11-21
1990-05-08
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356381, G01N 2186
Patent
active
049241052
ABSTRACT:
An optical measuring device for measuring a thickness of a workpiece or a height of a step thereof comprises a pair of deviation measuring means disposed in opposing relation to the workpiece, a pulse generating circuit for producing alternative pulse signals to control the deviation measuring means and signal processing means for adding outputs of the deviation measuring means each including an optical position detecting element having a light receiving plane disposed on an optical axis having a predetermined angle with respect to an optical axis of light beam irradiating the workpiece, a laser light source for emitting the light beam, a drive circuit responsive to the pulse signal to control the laser light source such that the optical position detecting element is irradiated with the light beam alternatively so that the deviation measuring means is operable only when the laser light source is emitting the light beam.
REFERENCES:
patent: 4298286 (1981-11-01), Maxey et al.
patent: 4555633 (1985-11-01), Bjorkelund
patent: 4806776 (1989-02-01), Kley
Mitsubishi Denki & Kabushiki Kaisha
Nelms David C.
LandOfFree
Optical measuring device with alternately-activated detection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical measuring device with alternately-activated detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical measuring device with alternately-activated detection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2350996