Contact us

Get in touch with usContact usPlease send us your inquiries and questions. We look forward to hearing from you and will answer as soon as possible! Please enable JavaScript in…


Homogeneous Bandpass Filters

Get inspired by the products we have already made -  or let us design your custom Bandpass Filter Optical Bandpass FiltersOptical Bandpass Filters are spectrally selective…


Privacy Policy

Privacy Policy Read about Delta Optical Thin Film’s privacy policy below. If you have any questions or need more information please feel free to contact us This website is owned and provided by: Delta Optical Thin Film A/S Venlighedsvej 4 2970 Hørsholm Denmark +45 70 70 71 46 Disclaimer While…


Fluorescence spectroscopy

Learn how to use optical filters for fluorescence spectroscopyFluorescence spectroscopyPhoto-luminescence is the phenomenon that a material emits light after having absorbed…


Tunable Bandpass filters with wide deep out-of-band blocking

New Tunable Bandpass Filters with Wide Out-of-Band Blocking for Photonic InstrumentsTunable Bandpass filters with wide deep out-of-band blockingTunable bandpass filters have…


OSA Industry Member Profile – Delta Optical Thin Film

By Samantha Hornback, Research & Program Development Coordinator, The Optical Society OSA Industry Development Associates (OIDA) member Delta Optical Thin Film, Denmark, is the leading continuously variable filter manufacturer in the industry. Calling themselves “The Optical Filter…


Optimum order sorting filters for spectrometers

Remove higher grating orders effectively in your spectrometerOptimum order sorting filters for spectrometersDiode Detector Array (DDA) spectrometers are widely used because they…


How does an interference filter work?

Learn the basics of optical dielectric multi-layer filtersHow does an interference filter work?Interference filters are very effective to accomplish almost any type of spectral…


Fluorescence filters

Explore the many types of optical filters used in fluorescence microscopy.Fluorescence filtersFluorescence filters are essential components in fluorescence microscopes,…


Specifying Optical Filters

Get the right combination of performance and cost of your optical filter by specifying it correctly.Specifying Optical FiltersAs the demand for high-precision optical filters…