Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1977-10-25
1979-10-16
Corbin, John K.
Optics: measuring and testing
By polarized light examination
With light attenuation
250237R, 356 1, G01B 900, G01C 308
Patent
active
041711602
ABSTRACT:
A distance measuring instrument comprising a source of coherent light and a receiver is disclosed which may be used to measure the one dimensional position of an object surface. Coherent light is directed at a predetermined angle onto the object surface and the angle at which diffusely reflected light from this surface enters the receiver is measured. This entrance angle is measured with a photosensor and a movable aperture formed by the intersection of a fixedly mounted diaphragm and a movably mounted diaphragm. By measuring the position of the movably mounted diaphragm when the movable aperture is placed so as to allow reflected light to pass from the illuminated surface to the photosensor, the entrance angle of the reflected light and hence the position of the object is determined.
REFERENCES:
patent: 2524807 (1950-10-01), Kallmann
patent: 2565745 (1951-08-01), Skalka
patent: 3254226 (1966-05-01), Bobula et al.
patent: 3950096 (1976-04-01), Aeschlimann et al.
Corbin John K.
Dr. Johannes Heidenhain GmbH
Punter Wm. H.
LandOfFree
Distance measuring instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Distance measuring instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distance measuring instrument will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-803439