Thin-Film Coating

II-VI Optical Systems is a recognized leader in the application of visible and infrared thin film coatings for a wide variety of substrate materials.

Coatings offered:

  • Durable Anti-Reflection (AR)
  • High-efficiency AR
  • Thorium-free AR
  • Conductive ITO
  • Diamond-like hard carbon (DLC)
  • Band-pass filters
  • Spectral broadband filters
  • Beam splitters

II-VI Optical Systems' coatings have been proven to withstand a variety of hostile environmental conditions such as severe abrasion, including the windshield wiper test, salt-water submersion, rain erosion, missile exhaust, humidity, and salt fog. Most of these tests are performed in-house.

II-VI Optical Systems' highly skilled optical thin film coating engineers design advanced coatings to meet our customers’ demanding specifications for next generation visible and infrared imaging systems, aircraft applications, and commercial products.

II-VI Optical Systems' Standard Coatings:

Whether a design calls for UV, Visible, NIR or IR wavelengths, II-VI Optical Systems can meet your most challenging coating  specifications.  Operating in a Clean Room environment, II-VI Optical Systems produces coatings which withstand high LDT requirements.

II-VI Optical Systems utilizes a wide range of thin film deposition technologies, including:

  • Ion Beam Sputtering (IBS)
  • Plasma Assisted Deposition
  • Ion Assisted Deposition (IAD)

Specializing in:

  • Broadband, Dualband, & Partial Reflective Coatings
  • Highly Reflective >99.99%
  • Low Scatter Reflective Coatings >99.9% Reflectivity Average
  • DPSS Dichroic Coatings
  • Metallic Coatings
  • High Laser Damage Threshold

Common Substrates


  • Fused Silica
  • Crown Glass
  • Flint Glass
  • Filter Glass

Specialty Materials

  • Laser Gain Crystals (YAG, YLF)
  • Non-Linear Materials (LiNbO3)
  • Crystals (KTP)
  • Calcium Fluoride

Thoriated Coatings and remediation of optics containing Thorium Flouride are available on request here: ThoriumSafety