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Fresnel Rhombs

  • Quarter-Wave or Half-Wave Retardance
  • Broader Wavelength Range than Waveplates
  • Cemented Prisms 
  • Customized specifications and modules are available upon request
Inquire for custom product  
Code Wavelength Retardation Aperture Mount Unit Price Delivery Cart
20709-001 210-400nm λ/2 10mm Mounted $465 4 weeks
20709-002 210-400nm λ/4 10mm Mounted $245 4 weeks
20709-003 400-700nm λ/2 10mm Mounted $385 4 weeks
20709-004 400-700nm λ/4 10mm Mounted $200 4 weeks
20709-005 600-900nm λ/2 10mm Mounted $385 4 weeks
20709-006 600-900nm λ/4 10mm Mounted $200 4 weeks

Fresnel Rhomb Retarders like broadband waveplates providing uniform λ/4 or λ/2 retardance over a wider range of wavelengths than possible with birefringent waveplates. They can replace retardation plates for broadband, multi-line or tunable laser sources.

The rhomb is designed so that a 45° phase shift occurs at each internal reflection creating a total retardance of λ/4. Because the phase shift is a function of the slowly varying rhomb dispersion, the retardance change with wavelength is much lower than other types of retarders. The half wave retarder combines two quarter wave rhombs.

Common Specifications:

Material BK7 Retardation Tolerance +/-2°
Flatness λ/10@632.8nm Surface Quality 20/10 S/D
Broad Band AR Coating R<1%
Fresnel Rhombs D10mm 210-400nm λ/4 mounted

Fresnel Rhombs D10mm 210-400nm λ/4 mounted

Fresnel Rhombs D10mm 600-900nm λ/4 mounted

Fresnel Rhombs D10mm 600-900nm λ/4 mounted

Fresnel Rhombs D10mm 400-700nm λ/2 mounted

Fresnel Rhombs D10mm 400-700nm λ/2 mounted