Edge Filters
Edge filters are precision optical components engineered to provide sharp transitions between transmitting and reflecting regions of the spectrum, acting as sophisticated wavelength discriminators in optical systems. Whether designed as Long Wave Pass (LWP) to transmit longer wavelengths while blocking shorter ones, or Short Wave Pass (SWP) for the opposite effect, these filters enable precise spectral control crucial for applications in spectroscopy, fluorescence imaging, and laser systems.
Andover Corporation manufactures edge filters using advanced thin-film coating technologies, including magnetron-sputtered hard oxide coatings and specialized steep-edge designs. Our comprehensive portfolio spans wavelengths from 300nm to beyond 1000nm, with transition slopes as sharp as ≤1% and transmission exceeding 91% in the pass region. Whether you need standard filters with 6% slopes or ultra-steep transitions for demanding applications like Raman spectroscopy, our interference-based designs deliver superior durability and thermal stability compared to traditional absorption-based alternatives. Each filter can be fine-tuned through angle adjustment, allowing precise matching to your specific wavelength requirements.
