Borescope Inspection Of Intersecting Passages

Rigid borescope, boroscope, side view mirror sleeve

Typical Rigid Borescope Mirror Tube

Intersecting passages can be viewed using a rigid borescope or semi-rigid borescope with the appropriate direction of view. If coaxial lighting is needed to view into a very small passage, a mirror tube may be needed. However, if the passage is large enough it can be illuminated using separate prisms. If intersecting passages are to be viewed, a mirror tube may be the best way to achieve the direction of view. A mirror tube is a close fitting tube that slips over the OD of the scope to position a mirror at the tip of the scope to reflect the image and illumination at 90°. While mirror tubes are very susceptible to dirt, they offer a coaxial lighting effect that helps to view deeply into a passage at right angles to the scope axis. When the passage is at an angle other than 90°, a mirror tube may not be the appropriate solution.

A flexible borescope may be needed to enter the intersecting passage, and a tool of some kind can be used to help the scope around the bend. Normal practice has been to use articulating borescopes for this, but they are not necessary. Standard borescope products will do a good job if they can be guided into the passages. They can also be customized for special requirements.

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About Paul Fitzgerald

Paul C. Fitzgerald, President and CEO, Advanced Inspection Technologies Inc. has been involved in the remote visual inspection industry (RVI), Since leaving the US Marines in 1992. He has a background in business with an economics degree from the University of Rochester and an MBA from Florida Metropolitan University. He served in the United States Marine Corps as an artillery officer. Mr. Fitzgerald is a veteran of Desert Storm. Mr. Fitzgerald began his remote visual inspection career with Schott Fiber Optics where he was responsible for sales throughout the southeastern United States. He was a founding member of Everest Imaging (later GE Inspection Technologies) in 1996 and took on responsibility for sales in Florida and the Caribbean. Mr. Fitzgerald founded Advanced Inspection Technologies in 2008 to offer remote visual inspection solutions throughout North America. His background and experience have given him an excellent overview of the remote visual inspection industry. He has years of experience with RVI applications across multiple industries, applications and geographical areas using a wide variety of available instruments and technology. Now Mr. Fitzgerald is able to share his knowledge and experience through this Blog.
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