Category : Optics (components, coatings, instruments and systems) > Optical instrumentation, systems and accessories

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The Risley Prism is a high resolution beam steering device consisting of a pair of rotatable wedged elements that redirect the laser beam by refraction. The refracting angle of each wedge is typically less than 5 degrees. By rotating each wedge independently the laser beam can be steered to any position within a solid angle defined by the maximum deflection.

Risley Prism Beam Steering
The Model 12-2001 and 12-2002 Risley Prism Beam Steering Assemblies utilize two single element fused silica wedges mounted in a housing that allows independent, manual rotation of each wedge. If both prisms are rotated in equal but opposite directions, the beam is deflected along a single axis. The independent rotation of each wedge allows the positioning of the beam anywhere within a solid angle defined by the maximum deflection. The transmitted wavefront deformation is < 1/10 wave over the 15 mm aperture. A set of indexed drum dials provide a direct angular readout for each wedge.

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List of all articles in this sub-category Optical instrumentation, systems and accessories

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