Broadband Beam Samplers
  • Uncoated front surface for beam sampling
  • Fresnel reflectance from 1–10% at 45°
  • AR coated back surface eliminates ghosting
  • Slight wedge virtually eliminates internal fringes
  • BK 7 or UV fused silica substrates
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DescriptionSpecifications Models Catalog PDF

Our broadband beam samplers are designed to split off, or sample, a beam by Fresnel reflection for beam monitoring applications where minimum disturbance of the transmitted beam is necessary. The precision optical substrate is uncoated on the front surface to achieve beam division by Fresnel reflection. The back surface is antireflection coated to prevent ghosting. A slight wedge in the substrate virtually eliminates internal fringes. Depending on the polarization of the incident beam, front surface reflectance from 1–10% can be attained at 45° incidence.

These beam samplers are available in either BK 7 for general use, or UV grade fused silica for optimal wavefront and thermal stability. Coating options cover the visible to near infrared regions.

Coatings
 Wavelength Range
(nm)		  Reflectivity per Surface  Angle of Incidence  Coating Code
 440–700  Ravg <0.75 %  45°  NC.1
 660–1000  Ravg <0.75 %  45°  NC.2
 1010–1550  Ravg <0.75 %  45°  NC.3