Method and apparatus for determining dimensional information con

Details Method and apparatus for determining dimensional information con Method and apparatus for determining dimensional information con

1982-12-10

1984-08-14

Punter, William H.

Optics: measuring and testing

By polarized light examination

With light attenuation

356241, 356376, G01B 1112, G01B 1124

Patent

active

044653743

ABSTRACT:
Method and apparatus for determining dimensional information concerning an object. A ring of light is directed onto an object surface such that at least a portion of the ring of light is incident upon the object surface. An image is formed of the incident light reflected from the surface. The width or position of the image is determined. The location of the surface is determined from the image width or position, and dimensional information about the object is determined from the surface location.

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patent: 4281931 (1981-08-01), Chikama
Kharizomenov et al., "Photoelectric Instrument for Automatic Measurement of Dimensions In Cutting", Meas. Tech. (USA) vol. 15, #1 (1-72) pp. 47-50.
Vesnina et al., "Instrument for Measuring the Depth of Scratches on Inside Surfaces of Tubes", Soviet Jr. of Optical Technology, vol. 39, 1-72, pp. 33-35.

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