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50mm Sq., Extended Hot Mirror

Extended Hot Mirrors

Stock #46-388 In Stock
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Angle of Incidence (°):
Hot Mirror, 0°
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Dimensions (mm):
50.0 x 50.0
Surface Quality:
Thickness (mm):
Thickness Tolerance (mm):
Shortpass Filter
Dimensional Tolerance (mm):
Clear Aperture (%):
Coating Specification:
Ravg ≥90% @ 750 - 1150nm
Ravg ≥80% @ 1200 - 1600nm
Tavg ≥85% @ 425 - 675nm
Wavelength Range (nm):
425 - 1600
Surface Flatness (P-V):
4 - 6λ
Coating Type:

Regulatory Compliance

RoHS 2015:
Certificate of Conformance:
Reach 233:

Product Family Description

  • Improved NIR Reflectance Over Standard Hot Mirrors
  • Operating Temperatures up to 230°C
  • Neutral Color for 5500K or 3200K Sources to ±250K

Extended Hot Mirrors are designed to reduce the heat in an optical system without sacrificing the system’s visible output. While typical hot mirrors reflect from 750nm to approximately 1250nm, Extended Hot Mirrors further reduce heat by extending the reflection range to approximately 1750nm.

Hot mirrors are crucial in many projection and illumination systems where high levels of heat can quickly damage sensitive components. Hot mirrors are specially coated to transmit visible light while reflecting the NIR, a major attributor to heat generation. By using a hot mirror, heat levels are limited with minimum impact on the overall system performance.