Optics: measuring and testing – Inspection of flaws or impurities – Bore inspection
Patent
1981-08-24
1985-01-15
Punter, William H.
Optics: measuring and testing
Inspection of flaws or impurities
Bore inspection
250562, 356237, 356394, G01N 2117, G01N 2188, G01B 1130
Patent
active
044935544
ABSTRACT:
A method of determining physical characteristics of a surface. Light or other electromagnetic radiation is directed onto a first portion of a surface and the reflected radiation is received such as by a photodiode. The radiation is also directed onto at least two further portions of the surface and located on either side of and proximate to the first portion. The radiation reflected by the further portions is also received. The radiation reflected from the first portion is compared with the radiation reflected from the two further portions. The radiation and comparison steps are repeated and the comparisons are used to determine a physical characteristic of the surface, such as the presence of one or more flaws. In another embodiment, light or other electromagnetic radiation is used to determine object dimension, such as bore dimension.
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Clarke Donald A.
Hageniers Omer L.
Liptay-Wagner Nicholas
Pastorius Walter J.
Pryor Timothy R.
Diffracto
Punter William H.
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