Bandpass Filters


Optical bandpass filters selectively transmit targeted spectral bands and block out-of-band wavelengths across the range – improving signal-to-noise ratio and improving contrast…customized for central wavelength, spectral bandwidth, blocking range, and blocking level. NIR Bandpass filters are used whenever there is a need to increase the signal-to-noise ratio of photodetectors (silicon). They protect detectors from undesired ambient background radiation (e.g. sunlight) or in-house illumination sources such as halogen or mercury lamps. This reduction of unwanted energy enhances detection of the target’s signal.

  • Central Wavelengths :Upon customers request
  • Environmental resistance / durability test temp. : (MIL-M-13508 C, para 4.4.4) 5 h each at -62°C and +71°C
  • Hardness : (MIL-M-13508 C, para 4.4.5) strokes with cheesecloth
  • Adherence : (MIL-M-13508 C, para. 4.4.6) Scotch tape test
  • Humidity : (MIL-M-13508 C, para 4.4.7) 24h at 49°C and r.h. > 95%
  • Temperature shift : <0.006% of CWL per °C


  • Excellent environmental stability
  • Minimal wavelength shift
  • Various sizes and shapes
  • One side coating on a single glass substrate
  • Various thickness available: e.g. 1.1 mm
  • Design flexibility for central wavelength, half-bandwidth, blocking, according to customers requirements

  • Machine vision
  • Range finding (distance measurement)
  • Optical data communication
  • Telecommunication
  • Traffic Control
  • Automotive
  • Safety & Analytical Systems

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