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Brewster Windows |
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Brewster Windows
Brewster windows are windows designed for use at Brewster's
angle (usually uncoated). This is the angle where only incident p-polarized light has 0%
transmission loss. They are and economical option for coupling
linearly polarized light into sealed optical systems and to select the
polarization of light traveling in optical cavities.
Brewster's angle can be calculated using the following equation:
θB=Arctan(nw/na)
Where θB is Brewster's angle and nw and na are the indices of refraction for the window and the ambient respectively. na is usually assumed to be 1 for air.
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RMI STANDARD
SPECIFICATIONS
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| Materials: |
BK7, UVFS |
| Angle of Incidence: |
Brewster’s Angle (θB) |
Surface Figure:
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λ/20 at 633
nm, both Surfaces
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Surface Quality:
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10-5 both Surfaces
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| Diminsional Tolerance: |
+ 0.000", – 0.010" |
| Thickness Tolerance: |
± 0.010" |
Wedge:
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≤ 10 arc seconds |
| Bevels: |
0.010" - 0.030" at 45º |
| Clear Aperture: |
Central 85% of diameter |
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Last Updated ( Monday, 16 June 2008 )
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Due to their potential strategic high value, export of RMI products and related technical data may be subject to U.S. or other export licensing requirements.
Please consult your export control administrator or contact RMI for more information.
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