A Rigth-Angle Prism is used as a mirror to deviate light through 90 degree, and also as a retroreflector to deflect light through 180 degree by total internal reflection.
90° Deflection:
180° DeflectionCapability:
Attribute | Commercial | High Precision |
Material | BK7, Fused Silica, CaF2 | |
Dimension Tolerance | +0.0/-0.2mm | +0.0/-0.1mm |
Surface Quality | 60/40 scratch and dig | 20/10 scratch and dig |
90° Deviation | < 30 arc seconds | <5 arc second |
Surface Flatness | λ/2 @632.8nm | λ/8 @632.8nm |
Clear Aperture | > 80% | > 90 |
Protective Beve | <0.25mm x 45° | <0.1mm x 45 |
Note: Custom sizes and wavelength range are available upon request.