Dove Prisms
Dove Prisms are used as image rotators in
a variety of opto-mechanical systems. They are a truncated form of the
right angle prism, and use total internal reflection (TIR) to produce
an inverted image which emerges from the exit surface without deviation.
As the prism is rotated about its optical axis, the image will rotate
at twice the angular rate of the prism. Since the length of the prism
is approximately four times the height, the incident light must be parallel
or collimated. For applications in which the hypotenuse cannot be kept
sufficiently clean for TIR, a metal or dielectric coating can be applied
to the hypotenuse.
RMI STANDARD
SPECIFICATIONS
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| Design Wavelength:
|
546.1 nm
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| Materials: |
BK7 |
Surface Figure:
|
λ/10 at 633
nm, all polished surfaces
|
Surface Quality:
|
10-5, all polished surfaces
|
| Dimensional Tolerance: |
+ 0.000", – 0.010" |
| Angular Deviation: |
≤ 3 arc minutes |
| Bevels: |
0.010" – 0.030" at 45º |
| Clear Aperture: |
Central 85% of diameter |
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Last Updated ( Wednesday, 02 May 2007 )
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