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Swing Prism

Swing Prism Borescopes

Swing Prism rigid borescopes, by GE, can fulfill the function of two or three separate conventional borescopes. The direction-of-view is adjustable from 55° to 115° and scans an object’s entire length. A zoom feature magnifies the entire image, unlike conventional zoom features that simply narrow the field-of-view. Additionally, the rotating barrel allows 360° viewing without moving the body of the scope. Swing Prism borescopes are available in 6, 8 and 10 mm diameters.

 

 

 

 

 

 

Features

Precision Optics

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GE Rigid Borescopes feature precision lenses, prisms and cover-glasses that deliver bright, clear images. The use of a special penta-prism at the tip ensures correct image orientation without the need for a compensating doveprism.

Special attention to maximizing light transmission in the optical path results in increased image brightness, and the on-axis resolution at the image center is held as high as possible towards the edge of the field of view. This uniform, flat field makes the smallest defects visible, and greatly reduces user eyestrain.

Superior Illumination Performance

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By bringing the illumination fibers close to the viewing window at the distal tip, in a “wrap-around” arrangement, the parallax between illumination and optical fields is virtually eliminated, considerably reducing the closest illuminated viewing distance.

All GE Rigid Borescopes are designed to correctly illuminate the entire field-of-view, right down to their minimum focusing distance.

Diameter and Length Options

Standard range Rigid Borescopes are available in diameters 4.0 mm (0.15 in.), 6.0 mm (0.24 in.), 8.0 mm (0.31 in.) and 10.0 mm (0.39 in.).

The standard range is available in working lengths from 100.0 mm (3.94 in.) to 905.0 mm (35.63 in.).

There are five choices of direction-of-view (DOV) and, on some diameters, three different fields-of view (FOV) can be specified.

Tip Length

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Unique tip design with shortest tip length and wrap around fibers

Tip Length

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Swing-prism Rigid Borescopes come with variable direction-of-view, a focusing device, rotatable objective tube and an optional variable magnification zoom eyepiece. Providing the capability to view steplessly in a range of directions, from 55º forward-oblique to 115º retro-view, one instrument can function in the place of two or three separate conventional Rigid Borescopes.

This multiple viewing capability is further enhanced by the rotatable insertion tube, which provides 340º of rotation stop-to-stop. (360˚ effective viewing with overlap from field-of view).

This versatility allows the same scope to be used for multiple applications and reduces inspection time by removing the need to stop the inspection to change scopes.

GE Swing-prism Rigid Borescopes are available in three diameters, 6.0 mm (0.24 in.) 8.0 mm (0.31 in.) and 10.0 mm (0.39 in.). On all models, two alternative fields-of-view are available, the standard 56º FOV being supplemented by an optional narrow-angle 35º FOV, giving higher magnification.

An optional variable magnification zoom eyepiece can be selected on the 8.0 mm (0.31 in.) and 10.0 mm (0.39 in.) instruments, making the Swing-prism Rigid Borescope one of the most versatile Rigid Borescopes around, offering variable direction-of-view, variable focus, variable magnification and circumferential rotary scanning.

Key Features & Benefits

  • 360-degree rotary scan
  • All metal construction
  • Triple tube construction for increased durability
  • Threaded light post to accept other manufacturers' light guide
  • "Wrap-around" light fibers for more efficient use of light
  • Standard 32 mm DIN eyepiece for camera adaptability

Rugged Construction

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GE Rigid Borescopes are specifically designed to meet the demands of harsh industrial environments, with all-metal construction, triple-tube shafts and durable hard-anodized aluminum bodies.

Triple-Tube Insertion Shaft

The insertion tube assembly consists of a double-walled stainless steel tube surrounding illumination fibers and the optical cover-glass. Fuel, oil and watertight, this sealed outer-tube assembly is pressure tested during the manufacturing process to protect the prism and lens system, which is assembled separately and fitted inside. In addition to protecting the precision optical components, this design also permits easy disassembly for service and repair.

All-Metal Body

An anodized aluminum body provides a secure and rugged location for the rotatable insertion tube and the ocular eyepiece.

360° Rotary Scan

The insertion tube of the Rigid Borescope can be rotated, allowing the viewing field to be scanned 360˚ (with overlap from field-of-view) without moving the body of the borescope. A positive stop is built into the body to prevent overrotation of the lighting fibers.

Viewing Direction Indicator

When inspecting inside a closed cavity or inspection area, the tip of the Rigid Borescope might not be visible to the operator and it can be difficult to determine which direction is being viewed. On all Rigid Borescopes with oblique, lateral or retro directions-of-view, a raised indicator mark in the rotary scanning control allows viewing direction to be monitored by feel alone, without taking one’s eye from the eyepiece.

Fiber and Bearing Life-Tested and Proven

During development testing, Rigid Borescopes were subjected to 20,000operating cycles, stop to stop. Bearing surfaces between the insertion tube assembly and the bore of the body showed no measurable wear, and there was no loss of lighting performance due to fiber breakage.

Adaptable Light Guide Fitting

All Rigid Borescopes have detachable click-on/click-off pistol grips that make them easy to handle, and protects the light-guide. The ACMI male light guide post can be converted to ACMI female / "O", Wolf, Storz andother pattern fittings.

Zoom Eyepiece Option

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All Rigid Borescopes can be specified with a variable magnification zoom eyepiece, which gives a stepless adjustable magnification range of an additional 2:1.

When used on an instrument with a narrow field-ofview of 35º, the zoom gives similar magnification, at all viewing distances, to Rigid Borescopes with a very narrow field-of-view, but without the decreased depth-of-focus associated with such instruments. This capability is particularly valuable when the image plane is neither flat nor perpendicular to the axis of the instrument.

The super-large exit lens of the zoom ocular delivers images that are big, bright and very easy to view.

Applications

  • Aerospace - Commercial, Military, OEM, MRO and Business Aviation
  • Power Generation - Nuclear, Fossil, Combustion Turbine, Combined-cycle, Hydro and Wind
  • Other - Manufacturing, Shipping

Turbine Inspection

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Impeller

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Oil-way Clear and Free of Debris and Burrs

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Airframe Inspection

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Valve

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Turbine Inspection

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Specifications

Operating Temperature -40° to 121° C (-40° to 249° F)
Pressure Resistance 3 Bar (44 psi.)
Fluid Resistance Insertion Tube will withstandimmersion in aviation fuel, kerosene, gasoline, diesel fuel, mineral and synthetic lubrication oils and hydraulic fluids, most industrial solvents and water
Body Length R: 95 mm (3.75 in.)
RZ: 160 mm (6.4 in.)
PR: 140 mm (5.5 in.)
RZ: 200 mm (7.8 in.)
RM: 50 mm (2.0 in.)

 

Part NumberDiameterWorking LengthDirection-of-ViewField-of-View
R6-27-VAR-50 6.0 mm (0.236 in.) 27.0 cm (10.63 in.) VAR 50°
R6-45-VAR-50 6.0 mm (0.236 in.) 45.0 cm (17.70 in.) VAR 50°
R8-23-VAR-50 8.0 mm (0.315 in.) 23.0 cm (9.06 in.) VAR 50°
RZ8-40-VAR-50 8.0 mm (0.315 in.) 40.0 cm (15.70 in.) VAR 50°
R8-57-VAR-50 8.0 mm (0.315 in.) 57.0 cm (22.40 in.) VAR 50°
RZ10-49-VAR-50 10.0 mm (0.394 in.) 49.0 cm (19.30 in.) VAR 50°
RZ10-69-VAR-50 10.0 mm (0.394 in.) 69.0 cm (27.20 in.) VAR 50°

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