HM-710 Hot Mirror & UV-IR Cut Filter

The HM-710 is the workhorse hot mirror in the KUPO Optics lineup, delivering peak transmission of 94.7 % at 681 nm. It passes the entire visible spectrum from 397 nm to 714 nm with excellent fidelity-blue reaches 89.8 %, green peaks at 92.1 %, and both yellow and red exceed 94 %. The transition above 714 nm is decisive: infrared transmission plunges below 0.1 % across the 850-1000 nm range. This sharp spectral edge makes HM-710 ideal for applications requiring maximum visible light throughput with aggressive IR rejection.

Key Advantages

• Razor-sharp cutoff - 50 % transition point at 714 nm with NIR(850-1000) falling to 0.1 %. Protects heat-sensitive sensors and optics from thermal radiation without compromising visible brightness.
• Consistent visible transmission - Blue (89.8 %), green (92.1 %), yellow (94.1 %), and red (94.2 %) all exceed 89 %, ensuring neutral color balance across the visible spectrum for uncolored imagery and display applications.
• Hard-oxide ion-assisted coating - Engineered for durability in high-temperature environments and long-term operational reliability. Withstands thermal stress and optical stress without degradation.
• Compact visible pass - Blocks from 714 nm onward, keeping the filter's optical footprint tightly controlled and ideal for tight spectral specifications in scientific instrumentation.
• Versatile custom formats - Available in round, square, and free-form blanks from 5 mm to 450 mm diameter, with thickness options from 0.21 mm to 3.8 mm on Borofloat, soda-lime, Schott D263 T, or Corning Eagle XG substrates.

Typical Applications

• Projection and display systems - Protects DLP and LCD imagers from thermal radiation in high-brightness projectors while maintaining neutral color rendering for accurate image reproduction.
• Machine vision and industrial inspection - Shields camera sensors from IR in factory automation, enabling accurate visual inspection under high-temperature process lighting.
• Microscopy and scientific imaging - Removes thermal background in microscopy applications while preserving specimen visibility across the full visible spectrum.
• Architectural and stage lighting - Enables efficient lighting fixtures by reflecting waste heat away from set pieces, performers, and sensitive stage elements while delivering bright, colored light.
• Medical and surgical imaging - Protects endoscope and surgical camera sensors from thermal radiation generated by surgical lights without affecting diagnostic image quality.

KUPO Optics can prototype HM-710 filters in your exact specifications-custom sizes, substrates, thickness, and coatings-in weeks, with production volumes from single units to high-volume runs.