A roof prism is a reflective optical prism to make two cross beams be parallel with each other. It contains a section where two faces meet at a 90° angle. These two 90° faces resemble the roof of a building, giving this prism type its name. Reflection from the two 90° faces returns an image that is flipped laterally across the axis where the faces meet.
In some cases, passing through the prism, the image is both deflected right-to-left and top-to-bottom. The hypotenuse of the prism utilizes total internal reflection (TIR) to reflect the image through the prism. Polarization states may become rotated during reflection.
The above is the schematic drawing of the simplest roof prism. There are many types of more sophisticated ones like the Amici roof prism, with other common roof prism designs being the Abbe–Koenig prism, the Schmidt–Pechan prism and probably the best known being the roof pentagon prism or penta prism.
As a rich experienced manufacturer, substrate material in Photonchina can be chosen from all optical glasses (N-BK7, for instance), Fused Silica, Si, ZnSe, ZnS, CaF2, MgF2 etc.
|Material:||N-BK7/N-SF11 or other glass materials|
|Angle Tolerance:||±1 arc minutes|
|Flatness:||λ/4 @ 632.8nm|
|Bevel:||<0.2mm X 45°|
|Coating:||Upon customer request|
Optical coating: K9 material for AR coating plot