Optics: measuring and testing – Inspection of flaws or impurities – Bore inspection
Patent
1979-05-17
1981-08-04
McGraw, Vincent P.
Optics: measuring and testing
Inspection of flaws or impurities
Bore inspection
350 9626, G01N 2101
Patent
active
042819296
ABSTRACT:
An improved rod optic system for inspecting small diameter, deep bores. The system consists of a rod optic system utilizing a curved mirror at the end of the rod lens such that the optical path through the system is bent 90.degree. to minimize optical distortion in examining the sides of a curved bore. The system is particularly useful in the examination of small bores for corrosion, and is capable of examining 1/16 inch diameter and up to 4 inch deep drill holes, for example. The positioning of the curved mirror allows simultaneous viewing from shallow and right angle points of observation of the same artifact (such as corrosion) in the bore hole. The improved rod optic system may be used for direct eye sighting, or in combination with a still camera or a low-light television monitor; particularly low-light color television.
REFERENCES:
patent: 3221593 (1965-12-01), Ferris
patent: 3413067 (1968-11-01), Froio
patent: 4072427 (1978-02-01), Alsberg
Report UCRL-52431 by D. E. Lord et al., Entitled "Optical Inspection of Small Diameter Deep Bores Using Rod Optics With Low-Light Television & Still Photography" Feb. 22, 1978.
Design News/11-20-78/63, "Mirror, Rod Optics Inspect Deep Bores"; R. F. Stengel, Westerner Editor.
Carter Gary W.
Lord David E.
Petrini Richard R.
Carnahan L. E.
Denny James E.
Gaither Roger S.
McGraw Vincent P.
The United States of America as represented by the United States
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