Andover Corporation is a recognized world leader in the manufacture of high-quality optical filters and coatings. We manufact ... ure a broad array of standard and custom components including bandpass, ND, long- and short-pass, heat-control filters, and more. Wavelengths from UV to Mid IR. Deposition techniques include ion-assisted e-beam deposition (IAD), and magnetron sputtering. Applications include machine vision, photolithography, water and gas analysis, calibration, etc. We are 100% US-owned, AS9100B, and AS9104A certified, and ITAR registered read more