When selecting materials for optical applications outside the visible spectrum, there are many different factors to consider. The obvious variables include the transmitted wavelength range, refractive index, achievable surface specifications, and of course, price. However, sometimes there are other parameters which can be overlooked such as: durability in harsh environments, sensitivity to moisture, raw material availability, and in some cases even toxicity.
We have compiled a helpful list of commonly used UV, visible and near IR optical materials with some useful insights and a few things to look out for:
Crystran also holds stock items of many of the materials mentioned here. These can be purchased online please check our website for more information: https://www.crystran.co.uk/products