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Optical & Industrial Glass Suppliers

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Interference Filters

Product Information
Both standard and custom-made interference filters can be supplied within the spectral range from 200 nm to 2000 nm. Development and production according to customers’ specifications comprise the greatest part of our business. The high vacuum evaporation process (PVD) is used to coat substrates. Ion assisted deposition processes, such as the reactive ion plating process are also available and lead to very hard and compact thin films. As a consequence, these interference filters exhibit excellent climatic resistance and have very stable spectral characteristics with respect to temperature and humidity changes.

Some products types are listed below:

  • Bandpass filters (line, band, and broadband filters)
  • Edge filters (longpass and shortpass filters)
  • Color temperature conversion filters
  • Heat reflection filters (hot mirrors)
  • UV blocking filters
  • UV mirrors
  • Cold light mirrors
  • Dichroic mirrors
  • Beamsplitters
  • Fluorescence exciter and barrier filters
  • Linear variable filters

The subsequent list only represents a small part of the entire range of applications possible:
  • Analytical measurements
  • Medical diagnostics (blood and urine analysis)
  • Immuno diagnostics
  • Ophthalmology
  • Dentistry
  • Environmental analytics
  • Fluorescence spectroscopy
  • Fluorescence microscopy
  • Semiconductor lithography
  • Measuring, testing, and control engineering
  • Optoelectronics
  • Sensors (industry, automotive, safety and monitoring systems)

Almost all inorganic glasses and glass ceramics are suitable for use as substrates for interference filters. The choice of substrate is highly dependent on the specific requirements placed upon the finished interference filter. For example, coating on:
  • Optical glasses
  • Borosilicate glasses (Borofloat® 33)
  • Fused silica
  • Optical filter glasses (color filter glasses)
  • Glass ceramics (ZERODUR®)
  • Technical glasses

Standard specifications are catalogued and are available for download.

Bespoke specifications can be developed, subject to certain limitations.

Filters as small as 1mm x1 mm can be supplied, right up to 400 mm in diameter (dependent on the interference filter selected).

Quality Assurance
Right from the uncoated substrate to the finished interference filter(s), both optical and non-optical properties are continuously monitored.

For further information please contact the team at Skan