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Product Announcement

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.

Typical specs:

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

First-Class Quality 

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

To discover how we can enhance your supply chain experience and to learn more about our stock and custom-made Mica Retarders, contact a member of our technical sales team today. 

View our News page for the latest updates and industry-specific blogs on optical components and cutting-edge utilisation.

UK, Europe, Asia & RoW: E-mail info@knightoptical.co.uk 

Tel +44 (0)1622 859444

USA & Canada: E-mail usasales@knightoptical.com 

Tel +001 401-583-7846 

Knight Optical Ltd
Roebuck Business Park
ME17 1AB
United Kingdom
Tel: 44 (0)1622 859444
Fax: 44 (0)1622 859 555
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