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Characteristic for a roof prism is that the beam is split in half, with one half of the beam hitting first one face then the other face, while it is invert for the other half of the beam. Therefore, a roof prism can be used only with some distance to focal planes, or the "edge" of the roof would introduce slight distortions. Furthermore, the angle between the two faces has to be very close to 90°, or image quality would be degraded.

Specifications:

Material : Optical glass
Diameter : 2-100mm
Dimension Tolerance :+0.0/-0.1mm
Surface Quality :60/40 
Angle Tolerance :<3 arcmin
Clear Aperture :>90%

Surface Flatness : λ/8 , λ/4
Bevel : Protective bevel as needed
Coating :Upon your request

Realpoo Optics is a professional manufacturer of optical glass lenses, such as Spherical Lens, Glass Rod, Fresnel Lens, Diffraction Grating etc. The optics can be offered with coating or without coating. Welcome to send your inquiry.