The roof prism deviates or deflects the image through an angle of 90 degrees. Basically, the roof prism is a right-angle prism whose hypotenuse has been replaced by a 90-degree total internal reflection roof. Cleanliness and quality of the total internal reflection roof surfaces is important. The 90-degree deviation applies only to rays, which are precisely normal to the entrance and exit faces. All other rays are deflected by varying amounts in exactly the same manner of an ordinary right-angle prism. The roof prism finds applications in situations that demand both right-angle deflection and image erection, such as in some instrument viewfinders.
Specifications:
Material: BK7 Grade A Optical Glass
Dimension Tolerance: +0.0, -0.2 mm
Clear Aperture: >80%
Angle Tolerance: ± 3arc minute
Flatness: l/2 @632.8 nm
Surface Quality: 60-40 scratch and dig
Protective Bevel |
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Part No.
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A (mm)
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B (mm)
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h (mm)
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RFP2720
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27.4
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20.0
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20.0
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RFP4130
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41.1
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30.0
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30.0
|
Note:
1. Custom-made non-standard Roof prisms at any other size are available upon request.
2. Roof prisms made of any other optical material are available upon request.
3. Coating is available upon requirements.
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Roof Prisms