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Right
angled prisms |
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| These are most commonly used
prisms. They deviate the light beam by 90 degrees or by 180 degrees
depending in the mode in which they are used. The hypotenuse face can
be aluminized if required. |
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Equilateral
prisms |
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| These prisms have three equal
angles of 60 degrees. They disperse the light beam into its constituent
colors. |
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Dove
prisms |
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| They are used for rotating the
image in a variety of applications. Their peculiar characteristic is
that the images rotates at twice the rate of rotation of the prism. |
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Littrow
prisms |
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| These have angles of
30º - 60º - 90º. Can be used to disperse the
light or deviate it by 60º without inverting or reverting the
image |
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Corner
Cube prisms |
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| These are also known as retro
reflectors. They reflect the incident beam back along the same path
regardless of the angle of incidence. This means that they do not have
to be aligned very precisely. |
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Penta
prisms |
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| These prisms have five sides
and deviate the
incident beam by 90 degrees regardless of the incident angle. They do
not invert or revert the image. The reflecting surfaces are aluminized. |
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Roof
prisms |
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| Also known as Amici prisms,
these are right-angled prisms having a "roof" on the hypotenuse. They
deviate the incident beam by 90 degrees and also invert the image. |
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Direct
Vision prisms |
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| These are combination of three
prisms of different
optical glasses, which gives dispersion of the light without deviation. |
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Rhomb
prisms |
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