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Liquid Crystal Variable Retarders


Liquid Crystal Variable retarders work by applying a voltage across the glass or silica plates, which are electrically conductive, have the liquid crystal between them. As the voltage across the plates is varied the alignment of the liquid crystal material will alter. The alteration of the liquid changes the effective birefringence and thus the retardation of the input beam. The liquid crystal media and the coatings on the silica plates will transmit from about 400nm to 1.8µm. The crystal retarders are birefringent elements that transform the polarisation state by inducing different phase shifts between the orthogonal electric field components of the electromagnetic waves. The optical device will be achromatic and the polarization can be precisely controlled over a wide range of wavelengths. This makes the retarder suited to applications that involve perception or recording of multiple channels at the same time and at different wavelengths.

Knight Optical supply high quality custom liquid crystal variable retarders to your specific custom requirement. Every component is individually tested by our highly skilled technicians in our state of 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 custom liquid crystal variable retarders 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.

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