Optical measurement apparatus

Details Optical measurement apparatus Optical measurement apparatus

1986-09-12

1988-05-31

LaRoche, Eugene R.

Optics: measuring and testing

By configuration comparison

With photosensitive film or plate

356243, 358199, G01B 1104

Patent

active

047476893

ABSTRACT:
An optical measurement apparatus for determining a plurality of dimensions of an object at linearly spaced locations on the object, in which the object is moved through a measurement station for measurement of a linear dimension of the object, to present the locations to be measured one by one. A light source on one side of the measurement station directs a beam of light at the location of the object in the measuring station transversely to the required line of measurement and to the path of movement of the object through the station. An elongate photo-electric array is disposed on the opposite side of the measurement station to the light source. A lens system focuses an image of the part of the object to be measured on the photo-electric array to form an image thereon. An elongate measurement graticule is provided on which a scale is delineated. Collimated light is directed through the graticule and thence into the lens system to be focused on to the photo-electric array whether or not an object is present in the apparatus for calibration of the array prior to or during a cycle of measurement of an object.

REFERENCES:
patent: 4390278 (1983-06-01), Inoue
patent: 4498778 (1985-02-01), White

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