Small diameter, deep bore optical inspection system

Patent · Thu Jan 01 00:00:00 EST 1981

OSTI ID:863943

Lord, David E ^[1]; Petrini, Richard R ^[1]; Carter, Gary W ^[1]

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1. Livermore, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4281929
• OSTI ID: 863943
• Country of Publication: United States
• Language: English

Related Subjects

diameter
deep
bore
optical
inspection
improved
rod
optic
inspecting
bores
consists
utilizing
curved
mirror
lens
path
bent
90
degree
minimize
distortion
examining
particularly
useful
examination
corrosion
capable
16
inch
drill
holes
example
positioning
allows
simultaneous
viewing
shallow
angle
observation
artifact
direct
eye
sighting
combination
camera
low-light
television
monitor
color
curved mirror
rod optic
particularly useful
optical path
optical inspection
optical distortion
television monitor
rod lens
improved rod
light color
/356/385/