Image Quality Bandpass Filter

In response to the need for high quality filters, Andover has developed the "Image Quality Filter". Our image quality filters utilize high-quality optical glass, ground and polished to 1/4 wave transmitted wavefront, and better than 30 arc seconds parallel. If necessary, a higher degree of optical quality is available for more critical applications. To prevent fringe patterns and multiple images, all coatings are deposited onto a single internal surface and all exterior surfaces are broadband anti-reflection coated for an average reflection of <=0.5%