Small diameter, deep bore optical inspection system
An improved rod optic system is described 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* 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.
- Assignee:
- Department of Energy
- Patent Number(s):
- US 4281929
- OSTI ID:
- 5892978
- Resource Relation:
- Patent File Date: Filed date 17 May 1979
- Country of Publication:
- United States
- Language:
- English
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Small diameter, deep bore optical inspection system
Optical inspection of small-diameter deep bores using rod optics with low-light television and still photography. [For corrosion]