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

Areas of application

Our products are currently used in the following fields

Apertures for endoscopes 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

Specifications

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

Metrology / QS

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

Antireflective layers (AR)

Poorly reflective coatings of 190 nm to 6 µm

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

Antireflection coatings

Transmission testing of 193 nm

Filter layers

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

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 (R_abs 400-1,000 nm > 98 %)
High reflectivities (R_abs @ 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

Formed lenses with metal mirrors

Dünnfilmbeschichtung eines dichroitischen Spiegels

Dichroitic mirror coating

Absorption layers (LRC/HRC)

Absorption layers with low reflection (black chrome)
High optical densities up to OD7
Narrow and broadband coatings

Microstructured chrome coatings

APS system

Transparent and electrically conductive layers (ITO)

however highly transparent in the visible range (e. g. to heat front surfaces for optical systems susceptible to condensation, or as transparent electrodes)

Retroreflector with ITO coating

Mikrostrukturen

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