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SCHOTT KG5, 25mm Sq., 3mm Thick, Colored Glass Heat Absorbing Shortpass Filter

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Stock #49-094 3-5 days
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Dimensions (mm):
25.0 x 25.0
Density (g/cm3):
Glass/Filter Number:
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Heat Absorbing Glass
Length (mm):
Operating Temperature (°C):
300 Maximum
Index of Refraction nd:
Surface Quality:
Transformation Temperature (°C):
Thickness (mm):
3.00 ±0.38
IR Cut-Off Filter
Width (mm):
Dimensional Tolerance (mm):
Reflection Factor Pd:
Wavelength Range (nm):
300 - 2700
Protective as needed

Regulatory Compliance

RoHS 2015:
Reach 223:
Certificate of Conformance:

Product Family Description

  • SCHOTT KG Colored Glass Substrates
  • Absorb Infrared Radiation
  • Standard Sizes with 1, 2, or 3mm Thickness

SCHOTT Colored Glass Heat Absorbing Shortpass Filters feature SCHOTT’s KG color glass, providing excellent absorption of infrared radiation. These filters can also be used as shortpass filters, passing visible wavelengths while blocking infrared radiation. SCHOTT Colored Glass Heat Absorbing Shortpass Filters are ideal for protecting sensitive components from heat generated by high intensity illumination systems. Custom sizes from 5 to 160mm are available upon request; for more information, visit our Colored Glass Filter Manufacturing capabilities webpage.

Filter Simulation Software

Click here to download SCHOTT’s colored glass filter calculation program which can be used to calculate the internal transmittance and external transmission of each SCHOTT glass type. The program can simulate the performance of individual filters with user specified thickness or of stacked filters with varying glass types and thicknesses.

Interactive transmission curves are also available here.

Immediate Custom Quotes Available

If you have a need for any round, square, or rectangular size of a SCHOTT Colored Glass Heat Absorbing Shortpass Filter in dimensions between 5mm and 50mm, please visit our Colored Filter Glass Tool.  We’ll provide an immediate quote, and can deliver the part to your requested size in approximately 2 weeks.  A full list of standard manufacturing tolerances and restrictions are listed.  For fully customized filters to your requirements, visit our Customized Optical Filter Glass Capabilities page.