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Product Announcement

Knight Optical’s 45° Cold Mirrors for Heat-Sensitive Systems

30 May 2022

Knight Optical – the leading supplier of on-spec, metrology-tested optical components – has a wide-ranging portfolio of 45° Cold Mirrors available from stock or as made-to-order components

Designed to transmit infrared (IR) wavelengths and to reflect bands below that, Cold Mirrors are dielectrically coated onto a glass substrate to reflect visible light. Because of this dielectric coating (which can be controlled for different AOIs – the most common of which is 45°), Cold Mirrors have a sharp cut on between IR and visible spectrums and are most commonly used in projection systems to help alleviate heat damage/

Available from stock or – as with all our components – as custom-made optics for seamless integration with your project, our 45° Cold Mirrors meet a diverse range of requirements sought by a diverse range of systems. By opting for tailor-made optical components, you can specify the shape, size, optical coating and tolerances best suited to your project. 

Typical specs:

Material: Borosilicate

Shape: Circular mirror, square mirror

Dimensional tolerances: +/- 0.1mm 

Parallelism: <5 arcminutes

Surface accuracy: < 5(2) @ 633nm

Surface quality: < 40-20 Scratch/Dig

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 Cold Mirrors, contact a member of our technical sales team today. 

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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