Roof Prism
Description
An Amici roof prism is a type of reflecting prism used to deviate a beam of light by 90° while simultaneously inverting the image. It is commonly used in the eyepieces of telescopes as an image erecting system. It is sometimes called an Amici prism of right angle roof prism. The device is shaped like a standard right-angled prism with an additional "roof" section (consisting of two faces meeting at a 90° angle) on the longest side. Total internal internal from the roof section flips the image laterally. The handedness of the image is unchanged.
The roof faces of the prism are sometimes coated to provide mirror surfaces. This allows the prism to be constructed with other beam deviate angles besides 90° without being limited by total internal reflection.
Roof Prism
Specifications |
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|---|---|
| Material: | BK7 |
| Dimensions (A): | 20 mm |
| Dimensions (B): | 20 mm |
| Dimensions (C): | 20 mm |
Applications
Telescope
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China
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On FindLight:
since 2015
Frequently Asked Questions
An Amici roof prism is used to deviate a beam of light by 90° while simultaneously inverting the image. It is commonly used in the eyepieces of telescopes as an image erecting system.
The handedness of the image produced by an Amici roof prism is unchanged.
The surface quality of the right angle prism ranges from 10/5 to 60/40.
The beam deviation angle of the Dove prism is less than 3 arc minutes.
The surface flatness of the dispersion prism is less than or equal to λ/4 at 633nm.