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  • Interferometer

Photonics Spectra
Aug 2009
ArdenPhotonics.jpgArden Photonics Ltd. has introduced an interferometer that inspects optical fibre ends with diameters between 100 and 1000 μm for quality and flatness. The VF-20 Trio has three user-selectable settings providing fields of view of 150, 500 and 1000 μm, and it operates in inspect and fringe modes, eliminating the need for separate inspection equipment. Analog and digital outputs enable the device’s use with a video monitor or computer. Applications include cleaver manufacture and maintenance, components manufacture, fibre research and development, and inspection of polished fibres. It is suitable for use with Vytran and other splicer holders.

An instrument that employs the interference of lightwaves to measure the accuracy of optical surfaces; it can measure a length in terms of the length of a wave of light by using interference phenomena based on the wave characteristics of light. Interferometers are used extensively for testing optical elements during manufacture. Typical designs include the Michelson, Twyman-Green and Fizeau interferometers. The basic interferometer components are a light source, a beamsplitter, a reference...
optical fiber
A thin filament of drawn or extruded glass or plastic having a central core and a cladding of lower index material to promote total internal reflection (TIR). It may be used singly to transmit pulsed optical signals (communications fiber) or in bundles to transmit light or images.  
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