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Shearing Interferometers can be used to determine if a coherent beam of light is collimated. The design consists of a wedged optical flat mounted at 45° and a diffuser plate with a ruled reference line down the middle. These interferometers are designed to provide qualitative analysis of a beam's collimation.
shearing interferometer is an extremely simple means to observe interference and to use this phenomenon to test the collimation of light beams, especially from laser sources which have a coherence length which is usually a lot longer than the thickness of the shear plate (see graphics) so that the basic condition for interference is fulfilled.
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Plano Convex Spherical Lens, Focal Length : 1000mm
22398-80-7
Indium phosphide substrates, <100>, N-type, contains sulphur as dopant, diam. × thickness 50.5 mm × 350 μm
Bi-Telecentric Lens (C-Mount) for 2/3” detector, magnification 1.0
Half wave plate (Diameter: 12.7mm, Coating: AR/ AR, R<0.25%@633nm)
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