Fresnel Biprisms
 

Material: High grade BK7 or UV grade fused silica glass
Apex angle close to 180°
Widely used in interferometers, auto/cross-correlators,
  and GRENOUILLEs

Shapes and Geometries

       With base                Without base

The apex angle, dimensions, and coating of the biprism diverse significantly from application to application.  Please contact us for the biprisms that best suit your applications.

Fresnel Biprism Specifications

Dimension Tolerance:+/- 0.2mm
Flatness: λ/4 at 632.8 nm
Surface Quality: 20-10 scratch and dig
Clear Aperture: >80%
Angular deviation tolerance: to be determined by customers
Coatings: AR coating with R<0.2% on the entrance/exit surfaces are
              available upon request