Features & Highlights
  • HEMEX® is the Highest Grade of HEM Sapphire Produced with Optical Homogeneity Measured as Low as 0.02 P-V
  • Transmitted Wave Front (TWE) of 1/10 Wave Peak-to-Valley or Better
  • Absorption <100 ppm at 1064nm
  • Sapphire Optics Up to 22” in Diameter, Various Thickness Available
  • Purity of 99.996% or Better, (View: GDMS Purity Analysis of HEM Sapphire)
  • Low Damage, Super-Polished Optics Available
# Optical Applications

New for aerospace and defense applications: Large-format, high-quality HEM-grown sapphire boules.

Most widely used synthetic sapphire in optical applications.

Exhibits the unique capability of having a broad transmission range from 250 nm to 5.5µm.

Produced by Crystal Systems in proprietary HEM growth systems and processes.

HEM Sapphire is the #1 leading sapphire material for highly sophisticated optical applications that require reliability, strength and a wide range of light transmittance.

HEM Sapphire transmits light over a broad wavelength range spanning from 250nm to 5.5µm.

Performance Characteristics
  • <100 ppm Absorption @1064nm
  • Low dn/dt Over a Wide Range of Wavelengths, (Window Temperature Gradient Does not Cause Image Blur or Bore Sight Error)
  • High Mechanical Strength for High-pressure and Shock-loading Applications
  • Refractory Temperature Tolerance to Within a Few Hundred Degrees to its 2040°C Melting Point
  • Chemical Resistivity Stable in Many Acid Environments at High Temperatures
  • An Attractive Choice for Laser Host Applications and Use at Cryogenic Temperatures Because of High Thermal Conductivity
  • High Resistance to Solarization Radiation Effects
  • Hardness – Excellent Rain Erosion Resistance and Low Frictional Coefficient
  • High Dielectric Constant (9.39 from 1.0 MHz to 8.5 GHz)
Optical Applications / Current Applications
Thanks to a robust dedication to material R&D, Crystal Systems is committed to supporting customers with new sapphire solutions to address their unique needs.
# Mechanical Applications

HEM Sapphire is used in many mechanical applications because of its large size, strength, abrasion resistance and chemical stability.

Performance Characteristics
  • Melting Point of 2040 C
  • Hardness of 9 on the Mohs Scale
  • Inert to Chemicals at High Temperatures
  • Low Coefficient of Thermal Expansion
  • High Compressive Strength
  • High Flexural Strength at Elevated Temperatures

HEM Sapphire has undergone extensive compressive and tensile strength testing at many different temperatures in order to understand its intrinsic failure modes and suitability for different applications.

Mechanical Applications / Current Applications
Crystal Systems’ unique HEM growth processes and extensive fabrication capabilities are fueling the replacement of less optimized crystal and glass materials with HEM Sapphire.

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Contact us for a quote on any of our sapphire products, or to discuss your specific technical application and requirements.

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