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Custom precision coatings on a wide variety of optical substrates

Dontech has an extensive array of high energy, thin film vacuum deposition systems for applying optical coatings to different types of substrates. Processes include DC and AC magnetron sputtering, ion-enhanced (IAD) e-beam evaporation and chemical vapor deposition (CVD). Our coating abilities range from a simple single-layer quarter wave optical layer applied to an optical substrate that reduces specular reflections to a very complex 100-layer dielectric optical stack dichroic filter that tightly controls the reflections and transmissions of light over a broad spectrum.

Dontech designs and applies thin film coatings on glass, plastic, and crystalline substrates. We coat rigid and flexible substrates. We customize our coatings for the optical spectrum from UV, Visible, Near IR and, through part of the Mid IR (out to 25 microns). Dontech’s optical coatings instill optics-enhancing features while also meeting a broad range of military, medical, and other industry durability requirements (e.g., high laser damage threshold).

Dontech Performance-Enhancing Thin Film Coatings

1 to 100+ layers coating stacks with individual layer thickness ranging from 100 to 4,000 angstroms can be applied to a broad range of materials.

  • VAR™ Brand Antireflective (AR) – Reflection control and optimized transmission performance in the UV, visible, and near-infrared (NIR) spectrums as well as a portion of the Mid IR (MIR) spectrum for substrates with and index from 1.47 to 4.0 and AOI from 0 to 60 degrees. Dontech’s spectrum of work ranges from 100 nm to 25 µm.
  • Transparent Conductive (e.g., ITO, AZO) – For visible and part of the NIR spectrums (out to 1600nm, dependent on substrate and coating conductivity)
    • < 1 ohm/sq to >100 ohms/sq
    • Dielectrically enhanced
  • Dichroic
  • Narrow Band Pass
  • Short Wave Pass (e.g., night vision compatible hot mirrors)
    • Long Pass
    • Band Rejection/Laser Blocking
    • Mirrors
    • Beamsplitters
  • HeatShield™ Brand Heat Reflectors – Visible pass and NIR through IR Reflective
  • Metallic
    • Dielectrically enhanced metallic Mirrors
    • Conductive Buses
  • Hydrophobic and Oleophobic Coatings – EZKlean™ brand antifingerprint & antismudge coatings
  • Hydrophilic Antifog Coatings
  • Custom


Common Substrates

Crystalline Substrates

  • Fused Quartz
  • Sapphire
  • Silicon (Si)
  • Zinc Sulfide (ZnS)
  • Zinc Selenide (ZnSe)

Glass Substrates – Options include annealed, tempered, and chemically strengthened.

  • Aluminosilicate
  • Borosilicate
  • Boro-aluminosilicate
  • Borosilicate-crown (N-BK7)
  • Fused Silica
  • Soda Lime

Plastic Substrates

  • Acrylic
  • Allyl Diglycol Carbonate (ADC)
  • Cellulose Triacetate (TAC)
  • Polarizers (linear & circular)
  • Polycarbonate (PC)
  • Polyethylene Terephthalate (PET)

DONTECH & Thin Film Coatings

Dontech has extensive engineering and technical support resources that can assist with your thin film coating selection and design needs. Our technical staff have diverse backgrounds relevant to high-performance display and precision optics markets. For many of our top customers, we function as an extension of their engineering departments, supporting projects from concept to final system delivery. We will integrate our optical filters and other enhancing components into touchscreens, displays, and systems to the level that is needed by our customers.

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