Optics: measuring and testing – Inspection of flaws or impurities – Bore inspection
Patent
1998-02-25
2000-07-18
Pham, Hoa Q.
Optics: measuring and testing
Inspection of flaws or impurities
Bore inspection
359367, 362158, 7386125, 738665, G01N 2100
Patent
active
060914890
ABSTRACT:
An optic device for use in viewing the interior of pressurized vessels, especially high pressure fluid pipelines. Embodiments of the optic device allow manual or automatic insertion/retraction of the viewing head allowing variable depth viewing of the interior. The viewing head is capable of various embodiments including the ability to carry various optic devices and is adapted to withstand high pressures. The automatically insertable optic device can be either hydraulically or pneumatically actuated. Both the automatic and manual optic devices may be fixed or variable focus. The fixed focus devices utilize lenses, ultra-miniature color cameras, and fiberscopes either with or without integral light sources as part of the viewing head. The variable focus device utilizes lenses and a reflector. Preferably, the viewing head utilizes sapphire viewing windows which exhibit excellent light transmission and resistance to high pressures. In this manner, light may be received for pickup by the lenses, camera, fiberscope, or the like.
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Olympus Industrial, "New Fiberoptic Imaging Technology . . . ", Jan. 1997, pp. 1-4.
Olympus Industrial, "Remote Visual Inspection of Natural Gas Pipeline Meters", Aug. 1997, pp. 1-4.
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Marshall Electronics, Inc., "Marshall Product News", approx. Feb. 1997, pp. 1-3.
Pham Hoa Q.
Welker Engineering Company
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