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Penta Prisms

To better serve you, we would like to discuss your specific requirement, Please Contact Us for a quote.

MSE supplies offers customized Penta Prisms with different materials, dimension, surface qualify, etc.

A Penta prism is a five-sided reflecting prism used to deviate a beam of light by a constant 90°, even if the entry beam is not at 90° to the prism. Since the beams are incident at an angle less than the critical angle, the reflections inside the prism are not caused by total internal reflection. Thus, the two reflecting surfaces need to be coated to provide mirror surfaces. It is widely used in metrology, when people need to find exact perpendicular positions.

MSE Supplies can offer a variant of optical elements, with different materials, size, surface quality and coating. Please contact us for customization or bulk orders. 

Technical Data:

Parameters Value
Material
  • Optical Glass
  • Fused Silica
Size (mm) 10-200
Size Tolerance (mm) +0/-0.01~+0/-0.1
Thickness Tolerance (mm) ±0.01~±0.1
Irregularity (P-V) @ 632.8nm λ/10~λ/2
Surface Quality 20/10~60/40
Centration <30”~3'
Clear Aperture (%) >90
Bevel Protective bevel as needed
Coating Uncoated, AR, BBAR, Mirror

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