Optical OEM Systems by SwissOptic in Heerbrugg, Switzerland

Coatings & Microstructures.

Application-Specific Surfaces.

We produce superior coatings for various applications. The spectral range runs from UV (190 nm) into the infrared range (5 µm; up to 12 µm for metal mirrors).


With our modern coating technologies (PVD with and without ion-assistance), we have extensive coating capacity with in-situ monitoring technologies (oscillating quartz and optical broadband monitoring) in order to provide you with specific solutions. The most modern measurement and testing techniques allow us to analyze even very demanding specifications.

Our coating services include

  • Coatings on typical optical glass as well as quartz, sapphire, CaFl2, Si, Ge, ZnS
  • Formats from diameters of 3 mm upwards, planar components up to 400 mm in length
  • Also, glass fibers, cemented substrates, crystals
  • Spectral range of 190 – 5,000 nm, mirrors from 190 nm – 12 µm
  • Conductive coatings (ITO), anti-glare absorption layers (e. g. black chrome, chrome-free as well)
  • High laser damage thresholds (LIDT)
  • Strict coating tolerances
  • ROHS compliant

In addition, we design and manufacture micro-structured optical components according to your wishes.


Through the use of various lithographic processes (lift off, etching processes, contact prints, proximity copies, imaging copies), we are able to find the perfect solution for optical masks, apertures, reticles and calibration plates.


More information on our coating development services is available under Coating Design.

Our products are currently used in the following fields

  • Apertures for endoscopy and other optical devices
  • Measuring solids in measurement and testing techniques
  • Reticles with crosshairs and similar structures used in telescopic sights or for optical measurement and analysis devices
  • Optical calibration standards for measurement machines with optical scanning
  • Resolution tests for microscopes and lenses


Substrate typesOptical glass, colored glass, quartz, sapphire, semiconductor materials, glass fibers, crystals (laser resonators)
Spectral rangeAR: 190 to 5,000 nm, mirrors: 190 to 12,000 nm
StructuringUp to 1 μm possible with an accuracy of 0.2 μm depending on the structure design


  • Various spectrophotometers for reflection & transmission (190-3,000 nm), optical density and polarization
  • Environmental/climate tests according to ISO and MIL (heat, moisture, autoclaving)
  • Abrasion and adhesive tests
  • Surface measurement technology (tensiometers)
  • Various tests with regards to chemical resistance
  • 4-point resistance measurement technology for conductive layers

Our expertise

Antireflective layers (AR)

Poorly reflective coatings of 190 nm to 6 µm

  • AR broadband (Rabs 400-1,100 nm < 1 %)
  • AR with low reflectivity (Rabs @ λ < 0.1 %)
  • Laser damage resistant coatings (pw & cw applications)
  • Multi-incidence angles (0-45° typical, 0-85° possible)

antireflection thin film coatings by Swissoptic AG in Heerbrugg

Antireflection coatings

transmission measurement 193nm at SwissOptic site in Heerbrugg

Transmission testing of 193 nm
Filter layers

characteristic protective filter

Characterization of a protective filter
  • Single band filter/laser protection filter
  • Multi band filters
  • Edge filters
  • Line filters
  • Narrow band filters
  • Graduated filters
Polarizing and non-polarizing beam splitting coatings

characteristics of beam splitter coating

Characteristics of a beam splitting coating
  • Chromatic beam splitters
  • Intensity beam splitters
  • Polarizing and non-polarizing beam splitters > TS/TP extinction ratio up 1000/1
  • Cemented beam splitters and beam splitters with defined air gap cementing
Mirror coatings

Highly reflecting metallic and dichroitic mirror coatings 120 nm to 12 µm

  • Boosted dielectric and metallic mirrors
  • Broadband mirrors (Rabs 400-1,000 nm > 98 %)
  • High reflectivities (Rabs @ λ > 99.5 %)
  • Multi-incidence angle (0-45° typical, 0-60° possible)
  • Mirror coatings for laser applications (20 J/cm2)
  • Front and rear surface mirrors
  • Stress-optimized coating designs

shaped lenses with metal mirror by SwissOptic AG in Heerbrugg

Formed lenses with metal mirrors

thin film coating of dichroitic mirror by Swissoptic AG in Heerbrugg

Dichroitic mirror coating
Absorption layers (LRC/HRC)
  • Absorption layers with low reflection (black chrome)
  • High optical densities up to OD7
  • Narrow and broadband coatings

sample pieces for microstructured coatings by SwissOptic AG in Heerbrugg

Microstructured chrome coatings

APS system at SwissOptic production site in Heerbrugg

APS system
Transparent and electrically conductive layers (ITO)

retroreflector with ITO thin film coating by SwissOptic AG in Heerbrugg

Retroreflector with ITO coating    
Manufacturing of conductive (adjustable resistance) ITO coatings, however highly transparent in the visible range (e. g. to heat front surfaces for optical systems susceptible to condensation, or as transparent electrodes)

Lithographically structured, arbitrary coatings in the µm range allow for new applications in high-end imaging opto-electronic systems with simultaneous, specific spectral sensitivities.


  • Tessellation and line filters
  • Filters with desire structured geometries
  • Color-coded systems (not just black and white)
  • Colored reticles
  • Colored gradient filters
  • Color filters

For additional technical details about the options for microstructuring, please see the data sheet


Microstructures & Finishing Technologies




checking structured thin film coating at SwissOptic Site in Heerbrugg

Testing for a structured coating

microstructured thin film coating - sample by Swissoptic AG in Heerbrugg

Microstructured coatings

    sample pieces for microstructured coatings by SwissOptic AG in Heerbrugg

    Microstructured chrome coatings

    optical calibration plate by Swissoptic AG in Heerbrugg

    Optical calibration standards
    Finishing techniques
    • Plug/screen printing
    • Edge/spray painting
    • Optically dense finishes

    Contact our specialists

    Please choose your contact partner, contact us directly using our contact form or let us call you back.

    Semiconductor Industry
    Christian Schmitt
    Fon +41 71 727-4790
    christian.schmitt [at] swissoptic.com
    Industrial Manufacturing, Security & Multimedia
    Kenan Aygör
    Fon +41 71 727-4011
    kenan.aygoer [at] swissoptic.com
    Robin Hitschfel
    Fon +41 71 727-3176
    robin.hitschfel [at] swissoptic.com
    US Office for Photonics
    Kevin Liddane
    Fon +1 714 389-1756
    kliddane [at] berlinerglasus.com

    Let us call you back!

    Callback request


    Anwendungsflyer Beschichtungen

    Customer-Specific Coatings

    (390 KB)

    Datenblatt Beschichtungen
    Data sheet

    Coating Options

    (358 KB)