25.4mm NIR II λ/4 Fresnel Rhomb Retarder

Product Details Broadband Performance with <2% Retardance Variation 12.7mm and 25.4mm Options Available λ/4 Retardance TECHSPEC Fresnel Rhomb Retarders are available with design wavelengths of 532nm and 1064nm. By utilizing a specific angle, Fresnel rhomb retarders impart a retardance with each internal reflection of the light, totaling λ/4. Each design is paired with either VIS 0° or NIR II coatings to provide efficient transmission across a broad range of wavelengths. These TECHSPEC Fresnel Rhomb Retarders deliver less than 2% retardance variation across the specified wavelength range and are optimized for use in diode and fiber applications. Specifications General Type: Fresnel Retarder Physical & Mechanical Properties Clear Aperture CA (mm): 18.81 x 18.81 Dimensional Tolerance (mm): ±0.10 Bevel: Protective as needed Width (mm): 25.40 Optical Properties Coating: NIR II (750-1550nm) Design Wavelength DWL (nm): 1064 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-BK7 Retardance: λ/4 Surface Quality: 20-10 Wavelength Range (nm): 750 - 1550 Entrance and Exit Surface (mm): 25.4 Angle Tolerance (arcmin): ±3 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 235: Compliant ×