Avantier provides specifications for Dove Prisms, encompassing the following key features:
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: Dove Prisms work best with collimated light, which means light waves that are parallel. When used with converging light (non-parallel rays), they can introduce substantial astigmatism due to their longer length.
: Light entering through a sloped face and propagating along the longitudinal axis of the prism reflects once from the bottom face and emerges from the other short side, resulting in an inverted image. An interesting property of Dove Prisms is that if you rotate the prism around its longitudinal axis, the image will rotate at twice the speed. A 30-degree rotation of the prism will result in a 60-degree image rotation.
: The high incidence angle, even when the propagation axis and prism&#;s longitudinal axis are not perfectly parallel, ensures that light reflecting from the bottom face undergoes total internal reflection. In situations where the hypotenuse surface can&#;t be maintained clean enough for TIR, metal or dielectric coatings can be applied to the prism.
: Dove Prisms are typically made from materials such as BK7 Grade A optical glass, Corning Fused Silica , JGS1 UV grade fused silica, and JGS2.
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: The dimension tolerance specifies the acceptable variation in the prism&#;s dimensions. Our factory standard for dimension tolerance is +/- 0.1 mm, and tighter tolerances can be provided upon request.
: The angle tolerance of Dove Prisms is typically less than 5 arc minutes, indicating the allowable variation in the angles.
: The flatness of a prism is the deviation of each of its surfaces from an ideal flat surface. Our factory standard for Dove Prisms is l/4l at 632.8 nm.
: The surface quality of a prism is described by a scratch and dig rating. A 60-40 scratch and dig rating, which is the factory standard, ensures highly polished surfaces with defined criteria for scratches and digs.
Contact us to discuss your requirements of Dove Prism for Image Rotation. Our experienced sales team can help you identify the options that best suit your needs.