logo
ISO 9001:2015Made in INDIA

Polarizing Optics


Fresnel Rhomb Retarders
Available in 3 different types
Wavelength ranges from 400 to 900 nm
Prices are exclusive of taxes and other charges.

Fresnel Rhomb retarders give half-wave or quarter-wave retardation nearly independent of wavelengths. Holmarc’s Fresnel rhombs are designed in such a way that a 22.5° or 45° phase shift occurs at each internal reflection creating a total half-wave or quarter-wave retardance. Holmarc’s mounted Fresnel rhombs are manufactured in BK7 or equivalent substrate and are available in 3 different types.

Single Fresnel Rhomb Quarter-wave retarder

A single Fresnel rhomb quarter wave retarder produces a phase shift of 90 (λ/4) due to internal reflections at two surfaces. This rhomb gives an output parallel to the input, but laterally displaced.

Double Fresnel Rhomb Quarter-Wave Retarder

A Double Fresnel rhomb quarter wave retarder produces a phase shift of 90 (λ/4) by the internal reflections at four surfaces. This rhomb has co-axial input and output.

Double Fresnel Rhomb Half-wave retarder

A Double Fresnel rhomb Half-wave retarder produces a phase shift of 180 (λ) by the internal reflections at four surfaces. This rhomb has co-axial input and output.

Model No. Type Retardation Mount Diameter ( mm ) Price
HO-SFRQ-10 Single Fresnel Rhomb Quarter-wave Retarder λ/4 25
HO-DFRQ-10 Double Fresnel Rhomb Quarter-wave Retarder λ/4 25
HO-DFRH-10 Double Fresnel Rhomb Half-wave Retarder λ/2 25
logo

Established in 1993, Holmarc Opto-Mechatronics Ltd manufactures variety of scientific and engineering instruments for research, industry and education.

ISO 9001:2015 Made in INDIA

CIN : L33125KL1993PLC006984
GST No : 32AAACH9492C1ZQ

Get in Touch

    B.7., H.M.T. Industrial Estate H.M.T. P.O, Kalamassery, Kochi Kerala, India - 683 503
   +91 920-719-7772 / 6 / 1
   sales@holmarc.com
   Mon - Sat : 9 am to 5 pm
   Investor Zone # Online Dispute Resolution

Privacy Policy | Terms & Conditions
2026 Holmarc Opto-Mechatronics Ltd. All rights reserved.