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Rhomboid Prism
Rhomboid prism can displace a laser beam without change the image orientation, the input beam is totally internal reflected by two 45degree faces and goes out from the output face. Then, a lateral displacement is produced. Higher transmission rate can be achieved by anti-reflective coating on the input and output faces. Rhomboid prism is always used in stereoscopic system and periscope system.

 
 
Currently we can make angle tolerance <5 arc seconds, total beam deviation <30 arc seconds. Large size is also available.
 
Specifications
 
Material
BK7 Grade A optical glass
Dimension Tolerance
±0.2mm
Beam Deviation
Up to 30 arc seconds
Angle Tolerance
Up to 5 arc seconds
Flatness
λ/4@632.8nm
Surface Quality
60/40 scratch and dig
Coating
AR coating available
 
 
 
 
 
Roof Rhomboid Prism
 
Roof rhomboid prism can produce a lateral displacement between input and output beam, and also the output image is reversed. Roof rhomboid prism is always used in stereoscopic system and periscope system.

 
Material BK7 Grade A optical glass
Dimension Tolerance ±0.2mm
Clear Aperture >80%
Beam Deviation
Up to 30 arc seconds
Roof Angle Tolerance <5 arc seconds
Flatness λ/4@632.8nm
Surface Quality 60/40 scratch and dig

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