Specialty HEM Sapphire Products

Our advanced sapphire material is recognized as the highest commercial quality sapphire available on a worldwide basis with proven excellence in optical, mechanical and transmission properties. Our advanced sapphire production capabilities have been developed over a 40+ year period. We give our customers the quality, testing and expertise they need to meet material requirements for the most demanding applications.

The combination of high purity level, crystalline perfection, and low light scatter give our customers an advantage in their applications. Learn more about our specialty materials used for the most extreme and demanding applications.

  • Hemex Sapphire− is world renowned for showing no stress birefringence, no bubbles and no other defects. This grade of material is used to produce optics of 1/20th wave and better.
  • HEM (LAOS)− Low Absorption Optical Sapphire – used in applications where minimal photon absorption is critical to performance.
  • HEM (LAOS 193)− Vacuum Ultra Violet Sapphire – a special sapphire product optimized for semiconductor applications at and near 193nm.

Hemex Sapphire

Our Advanced Materials Group produces the world’s highest quality sapphire called Hemex Sapphire.  This special sapphire has perfect crystalline structure with no detectable light scatter and is capable of supporting finished optics with transmitted wave front values of 1/20 wave peak to valley and better.  Hemex material has been independently characterized using Berg-Barrett X-Ray topography, which concluded that no dislocations in the crystalline structure could be found.  These superior crystals are utilized in applications where there can be no compromises making Hemex the absolute pinnacle of sapphire quality.

Applications

Hemex is used in critical engineering applications where zero defect sapphire is needed to support the fabrication of sophisticated optical components and systems.  These applications can include high power laser optics, acoustic wave devices, 1/20 wave optics and neutron filters.


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Specialty HEMEX - Transmitted Wavefront HEMEX Window

Features and Highlights

Hemex material is world renowned for showing no stress birefringence, no bubbles and no other defects.

Ultra-low dislocation density

Homogeneity of refractive index as low as 0.022 PV (peak to valley) waves

No detectable light scatter or inclusions

Supports optics of 1/20 wave and better

Low Absorption Optical Sapphire (LAOS)

Our Low Absorption Optical Sapphire (LAOS) products are optimized for transmission-critical applications where low photon absorption is critical.  The attribute that sets this material apart from other HEM products is the emphasis on achieving low bulk absorption.  LAOS material can be customized for optical transmission efficiency at different wave lengths such as 355nm, 1062nm, etc. We have developed an end-to-end optical fabrication process that ensures that the LAOS optics have surfaces that are low absorption and low damage with excellent wave-front performance.

Applications

LAOS is used in applications where low absorption performance is required. These products can also be used to achieve excellent wave-front performance if that is necessary as well. Zero defect sapphire is needed to support the fabrication of sophisticated optical components and systems. These applications can include high power laser optics, acoustic wave devices, 1/20th wave optics and neutron filters.

Features and Highlights

Low absorption optimized for your wavelength

Absorption as low as 41ppm/cm @ 1064

Ultra high purity

High power laser window material

LAOS 193 Sapphire

LAOS 193 sapphire products are similar to our LAOS products but are optimizes for vacuum ultra violet (VUV) operation at around 193nm. Most sapphire material has a deep absorption band in this region and our LAOS 193 material is specifically engineered to operate effectively in this spectral range. LAOS 193 optics have surfaces that are low absorption in order to avoid any parasitic effects of the polishing process.

Applications

LAOS 193 optics are used in the semiconductor industry where many process operations take place at or below 220nm.


193

Features and Highlights

Maximized transmission below 260nm

UV and VUV optimized

Ultra high purity

Solarization resistant

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