Polarizing Optics
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 |
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
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