Knight Optical’s Mica Retarders for Optical Systems
03 Nov 2022
Knight Optical supplies a wide-ranging portfolio of Mica Retarders suitable for a range of applications – including optical systems. These Retarders are available as custom-made optical components or from stock for next-day dispatch (please note, our stock range is being discontinued).
Our Mica Retarders are manufactured from a thin layer of a fragile birefringent material, which is then sandwiched between two glass plates. As such, they are used to change the polarisation of incident light and output different polarised light with minimal attenuation. What's more, they can be used to isolate polarised light to remove feedback and, in conjunction with a Beamsplitter, may be used to route light more efficiently.
Material: N-BK7 (or equivalent) [window], Mica (retarder)
Diameter tolerances: +/- 0.1mm
Thickness tolerances: +/- 0.1mm
Quarter wave: +/- 0.01λ
Half wave: +/- 0.02λ
Parallelism: +/- 5 arcminutes
Surface figure: < 2 waves
Surface quality: < 20-10 Scratch/Dig
Coatings: < Antireflective (AR) Coatings available on request
Quality is the driving force behind Knight Optical, and to ensure you profit from high-precision optics, we take the utmost care to ensure every component accurately meets your specifications. Offering unparalleled service, Knight Optical undertakes a full inspection of your optics from our ISO 9001:2015-certified, state-of-the-art Metrology Laboratory, followed by a meticulous visual examination by our dedicated QA department.
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