Colored Glass Filters
  • New 12.7 mm diameter size
  • The most comprehensive offering of colored glass filters
  • Bandpass, long pass, and heat-absorbing filters
  • UV, visible, and NIR
  • 25.4 mm dia and 50.8 mm square sizes are permanently marked with glass type
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General Description Models

Our colored glass filters serve as broadband, bandpass, or long-wave pass filters. We have expanded our offering to a variety of 41 different Schott and Hoya color glasses covering the UV, visible, and near-infrared wavelength regions. These filters are precision polished for demanding research or OEM applications. They are available in three sizes—12.7 mm diameter, 25.4 mm diameter and 50.8 mm square.

Schott and Hoya colored glass filters are widely used for order sorting, light attenuation, and spectral selection of a broadband source. They are significantly less expensive than multi-layer coated filters which have sharper cut-on and cut-off wavelengths and better rejection.

25.4 mm diameter and 50.8 mm square colored glass filters are available individually or in a set of twelve. The set consists of one of each filter available packaged in a protective hardwood case. All filters are shipped with a transmission curve. For easy identification, The 25.4 mm diameter and 50.8 mm square filters are permanently labeled.

Specifications
 Material  Schott and Hoya colored glass or equivalent
 Clear Aperture  ≥central 80% of dimensions
 Surface Quality  60-40 scratch-dig
 Dimensions  ±0.3 mm
 Thickness  3.0 ±0.1 mm (2.0 ±0.1 mm for UG.11)
 Wedge  ≤3 arc min
 Chamfers  0.25–0.76 mm face width x 45° ±15°
 Angle of Incidence  0°
 Cleaning  Non-abrasive method, acetone or isopropyl alcohol
on lens tissue recommended (see Care and Cleaning of Optics)
 Damage Threshold  30 W/cm2 CW, typical


For safe operation: (1) Do not exceed a 5 °C/min temperature rise; (2) Spread the beam over the entire surface of the filter; (3) Use a holder which minimizes thermal and mechanical stress; and (4) Avoid high ozone environments.