Borescope

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borescope

[′bȯr‚skōp]
(engineering)
A straight-tube telescope using a mirror or prism, used to visually inspect a cylindrical cavity, such as the cannon bore of artillery weapons for defects of manufacture and erosion caused by firing.

Borescope

A device for examining hidden areas in an existing structure, consisting of a flexible rod of fiber optics; one bundle of fibers carries light to the ends of the fibers, the other bundle is used for viewing or recording the image with a video camera.
References in periodicals archive ?
My bore scope revealed no copper fouling but I could see some remaining carbon fouling at the back third of the barrel.
Using a bore scope kit, the NCOs were able to obtain valuable pictures and video for the Launcher Item Manager.
The Olympus bore scope (shown being used here) can provide a good view of the inside walls of the tube.
The Hawkeye Bore Scope meets that need very handily.
A bore scope will show the extent of the altered lands forming the new throat.
Tenders are invited for Purchase Of Pro Video Bore Scope
And the day was now a bust, as I didn't have a back-up rifle with me, the bore scope was back in the shop, and I probably had a baffle strike or three in the Covert.
I was curious about the potential for damage to the Grunt, what with the corrosive ammo exposure, the heat, and the probability of a baffle strike, so I hauled my Hawkeye bore scope down off the shelf and took a look.
The barrel's never come close to charring the fore-end, and the throat of the bore doesn't show a trace of heat checking when examined in a bore scope.
The team took the initiative to use a bore scope to verify corrosion inside the connecting link.
Check the barrel and crown with a bore scope for any factory flaws.