Some applications require the observation of a wider area that can be achieved using a single rigid instrument. Standard rigid borescopes have a fixed direction of view and a fixed field of view, which although perfectly suited to a single area inspection, can necessitate a kit of multiple instruments to fully inspect a larger area.
The Swing Prism borescopes feature an adjustable prism in the objective end of the instrument that allows the operator to remotely control the direction of view from 45° fore-oblique to 115° retro, thus allowing the area to be 'scanned'. Coupled to the standard 50° field of view of the instrument, a total arc of 120° can be viewed. In addition, the light guide fibers at the objective end are separated to provide a spread of illumination across the entire viewing range.
All the optical innovations of conventional Olympus standard rigid borescopes are also incorporated in the Swing Prism design.