Delta Thin Film - interference filter How Does An Interference Filter Work?

Explore the behavior of light at the interface between dielectric layers and the design, applications of interference filters, and the use of multiple layers to create advanced filters.


  • The LightIR thermal imaging zoom lenses are lightweight, compact, and high-performance, designed for a range of reduced SWaP applications, including UAVs, aircraft vision systems, drones, and more.

  • Edge Blackening is the application of a matte black paint to the edges of an optical filter to prevent stray light inside the filter from re-entering the light path outside the filter.

  • Transform your optical systems with Semrock filters - the brightest, most durable, and spectrally sophisticated filters in the market.

  • The Melles Griot XPLAN Lens Series fluorescence microscope imaging systems enable the rapid development of breadboard instruments for next-gen sequencing, proteomics, and spatial biology applications.

  • The Ophir SWIR & NIR 25-250mm f/5.5 (NFOV) f/4.0 (WFOV) continuous zoom lens is a first-to-market low-Size, Weight, and Power (SWaP) compact lens.

  • The 26 bandpass optical filters in the Nanopede series cover the near UV and visible spectrum in 20 nm Full-Width, Half-Max (FWHM) steps. Moving into the NIR, the FWHM increases to 30 nm.

  • The FoldIR 30-450mm f/3.4 continuous zoom lens features an innovative folded optical design, offering a lightweight, compact design that still maintains long optical lengths and improved tolerance sensitivity.

  • Wide-angle lenses are lenses in which the focal length is significantly smaller than the image circle and are used when you want to capture as much of the scene as possible from a certain distance.