Precision Infrared Narrow Bandpass and Dual Bandpass Filters Featuring Low OH-Band Absorption

17 Jul 2013

Alluxa’s new precision infrared bandpass and dual bandpass filter technology brings new levels of performance with higher transmissions, steeper slopes, and flatter pass bands than traditional evaporated coatings.

Alluxa’s new class of Infrared (IR) bandpass and dual band filters bring the precision of dielectric filters to the IR between 2 and 5 microns. They are manufactured with an advanced, plasma enhanced PVD process using durable, hard metal-oxide, and durable semiconductor front surface thin films. The films have excellent environmental stability. The OH (water) band at 2.7 microns shows loss below the measurement limit even after 10 days of harsh Mil-810G temperature and humidity cycling.

The narrowband and dual band IR filters are the latest innovation in the Ultra product line to come from Alluxa’s novel plasma hard coating process. The filters will offer performance improvements and new design options in a wide range of applications from gas sensing, chemical monitoring, and night vision, to LIDAR and FTIR Spectroscopy. The ULTRA line is intended to offer OEM customers and researchers higher performance than off the shelf products and commitment to tighter specification tolerances in order to provide the best possible system level performance.

Alluxa designs and manufactures next generation hard coated optical filters using a proprietary plasma deposition process in Santa Rosa, CA. Alluxa’s unique, purpose-built deposition platform and control systems were designed, developed, and built by our team in Santa Rosa, CA to address the demanding requirements of the next generation of systems and instruments. This unique technology allows Alluxa to create the world’s most challenging filters at breakthrough price points