Envin has for many years been manufacturing and supplying optical filters for use from the ultra violet to the far infrared. On-site manufacturing has enabled Envin to support customers by designing and prototyping new filter products using technology compatible with subsequent production. The creation of novel prototype Advanced Performance Optical Filter products is now possible in a rapid and cost effective manner which was not previously achievable. Measurement of these filters is supported by Industry standard Perkin Elmer Spectrophotometers:- Lambda 900 for 175 to 3200 nm and PE983 for 2 to 25 microns.