Prisms
There are four functional properties of a prism: image transposition, deviation, displacement and dispersion. JML offers a variety of different prisms for various uses and in several materials.
- Right Angle Prisms -
Engineers or designers commonly make use of a right angle prism's total internal reflection. They use the right angle prism in one of two orientations. The first is called the single mirror
or leg-hypotenuse-leg orientation. The second is called the double mirror or hypotenuse-leg-leg-hypotenuse orientation. For both orientations, incoming light must travel parallel to the plane that includes the right angle vertex.
- BK 7 Right Angle Prisms
BK7 Wedges - Common names for a wedge include wedged window and thick or thin prisms. Used as a wedged window, a wedge can control the direction of back-reflected light at each surface. Applications for wedged windows, as opposed to standard plane-parallel windows, can be found in lasers and interferometers. As a thick or thin prism, a wedge can be used to disperse light into its constituent colors. Color analyzers and spectrographic instruments contain prisms or diffraction gratings to bend light of different colors into different angles for analysis.
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BK7 Corner Cube Prisms - A corner cube is, geometrically speaking, cut from the corner of a cube of glass. It has three mutually orthogonal reflecting faces and one entrance/exit face. A ray of light entering the corner cube will experience three total internal reflections. After the third reflection, the ray exits in exactly the opposite direction of the original incoming ray.
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BK7 Dove Prisms - As the dove prism is rotated about its own long axis, the orientation of its image rotates at twice the angular displacement. Thus an image can be rotated through 180 degrees by rotating the dove prism through only 90 degrees. Engineers use dove prisms to invert an image or to provide continuous control of the orientation of an inverted image.
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