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STANDA in Lithuania
STANDA  P.O. Box 2684, 03001 Vilnius, Lithuania
Phone +370 5 2651474, Fax +370 5 2651483
E-mail: sales@standa.LT
Standa in the World
Home > Polarizing Optics > 14FR - Fresnel Rhomb Retarders Achromatic
Fresnel Rhomb Retarders Achromatic
See drawings here

Standa manufactures Fresnel Rhombs and mounts for them. 14FR is a combination of a rhomb with a mount (see drawings). Fresnel Rhombs are made of BK7 crown glass or UV grade fused silica. A Single Fresnel Rhomb produces a phase shift of 90° (λ/4) due to total internal reflections at two surfaces. A Double Fresnel Rhomb produces a phase shift of 180° (λ/2) between the components of light polarised perpendicular and parallel to the plane of incidence. It consists of two optically contacted (or air spaced) single Fresnel λ/4 Rhombs. The retardation varies only slightly over a relatively wide range of wavelengths. Fresnel Rhombs mounts are cylindrical in shape. The end faces of a Fresnel retarder are adjusted orthogonally to the axis of rotation. The clear aperture of the mount is 10 mm. There are several ways to mount the 14FR Fresnel rhomb retarder:
- on any adjustable unit (e.g. a stage) by the M6 and M4 tapped holes;
- to our Polarizer Holder as 5PH50, 5PH51 or other compatible unit using the M27x1 thread.

Standard Specifications
MaterialBK7 or UVFS
Beam deviation≤ 10arcsec
CoatingAR coating
Available wavelength ranges:
    UV260-400 nm
    VIS400-700 nm
    NIR1700-1300 nm
    NIR21300-1600 nm
Ordering CodeRetardationWavelenght range, nm
14FR1-UV-M27 (temporary not available)single (λ/4)260-400
14FR2-UV-M27 (temporary not available)double (λ/2)260-400
14FR1-VIS-M27single (λ/4)400-700
14FR2-VIS-M27double (λ/2)400-700
14FR1-NIR1-M27single (λ/4)700-1300
14FR2-NIR1-M27double (λ/2)700-1300
14FR1-NIR2-M27 (temporary not available)single (λ/4)1300-1600
14FR2-NIR2-M27 (temporary not available)double (λ/2)1300-1600

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