Europe, UK, Asia & RoW: [email protected] +44 (0)1622 859444 | USA & Canada: [email protected] +1 401-583-7846


Looking For a Custom Optical Solution? Enquire


Calcite (CaCO3) is a strongly birefringent material known for its use in polarisers. It is structurally anisotropic and has two refractive indices. The material is reactive to weak acids and has a low solubility in water, a trait which decreases with water temperature. Consequently a protective coating is recommended. Nevertheless calcite cuts and polishes well. Calcite transmits at over 75% in the 0.3-2.3μm range making it appropriate for use in the IR and VIS spectrum.

Calcite is typically used in Glan-Laser and Glan-Taylor polarisers where the relatively soft material is protected by a metal housing. Calcite’s optical properties make it ideal for this application. The material can be used in windows and retarders and other optical components where transmission between 0.3 and 2.3μm is desired, but other materials may be more suitable to the role.

Knight Optical supply a range of quality calcite optical components including calcite polarisers and windows, calcite lenses, calcite prisms, and calcite polarisers either from stock or bespoke custom parts made to your specification for a range of applications. Every component is individually tested by our highly skilled technicians in our state of the art metrology lab to ensure all components meet our high quality standards.

Contact our multilingual technical sales team and discover how Knight Optical’s high quality calcite optical components and service can improve your instrumentation and supply chain experience.

Our 2018/2019 Catalogue

Inside Knight Optical’s catalogue you’ll find details of the industries we serve as well as the many other services we can offer. It also showcases hundreds of our most popular products, supported by useful technical information, to help you choose the right part for your application.
Click below to view our digital catalogue now.

view our catalogue