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Roof Prism

Roof prism is a special type of optical prism composed of two 90 ° vertical reflecting surfaces (roof surfaces), mainly used to change the direction of the optical path and maintain the image orientation unchanged. It is commonly used in optical systems such as binoculars, sights, microscopes, etc. Its core feature is the use of two mutually perpendicular reflective surfaces (ridge surfaces) to achieve upright and left-right non reversal of the image.

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Specifications of Roof Prism


General spec.High precision spec.
MaterialOptical glass (H-K9L, BK7, or others), Fused silica
Dimension2mm~80mm
Dimension tolerance±0.1mm±0.02mm
90°Deviation   tolerance<3 arc min< 3arc sec.
Surface flatness @ 633nmλ/2λ/4
Surface quality60-4020-10
CoatingUpon the customer's request




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