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Custom Optical Coatings

Overview about our types of thin film coatings and capabilities

In addition to our large program of standard thin film components, we offer the production of custom optical thin film cotings with a high optical performance, according to your exacting specifications. The following overview presents a summary about the most common coatings used in industry and science. We coat these optical coatings mainly on flat optical substrates but depending on the details it is also part of our capabilities to coat lenses and precision optics. Please follow one of the links to our coating inquiry form to conveniently enter the characteristics of your required customized coatings:

Customized metallic & dielectric mirror coatings

Characteristic reflection curve

Optical coatings with mainly reflecting properties and high imaging quality. These can be based on all dielectric or metallic coatings, like aluminium, enhanced aluminium, silver, enhanced silver, gold, chrome, copper, rhodium or platinum. Dielectric coatings are often used for laser applications. The optical reflection, angles of incidence, polarization and most other properties can be adjusted according to custom requirements. In addition to our standard mirror coatings you can use our custom optics enquiry form to conveniently get a quotation for your customized high performance mirror.


Customized beamsplitter coatings &
partially transmitting optics

Characteristic beam splitter curve

Optical coatings used for neutral splitting of light or laser radiation or for defined damping of a light source. Beamsplitters can either be based on dielectric or metallic coating systems. The splitting ratio can be adjusted to customer’s specification by modifying the dielectric layers or layer the thicknesses. The backside can be anti-reflection coated to minimize unwanted secondary reflections and to prevent energy loss at the backside of the beamsplitter. In addition to our stock beamsplitter coatings, you can use our custom optical thin films quotation form to conveniently get a quote for your customized beamsplitter. Also special optical designs for laser applications are available.


Customized single- & multilayer anti-reflection coatings

Characteristic transmission curve

Coated optics design, that minimizes or eliminates unwanted reflections and ghost images or double laser beams which can occur from uncoated glass surfaces. The optical design can be optimized for single wavelengths or for a wide wavelength range (broadband AR-coating) and extra low reflection. The usable transmitted light is almost increased by the same amount the rest reflection is decreased. In addition to our off-the-shelf anti-reflection coating you can use the coating inquiry form to conveniently get a quote for your customized high quality anti-reflective coating design.


Customized cold mirror coatings

Long pass filters, cool light reflectors

Dielectric optical coatings with a high reflection performance in the visible range and good transmittance in the infrared range. A cold mirror is mainly used to efficiently filter out heat or IR-radiation from a lamp or a optical system. The cut-on and cut-off wavelengths and the range of reflection can be shifted or modified according to customer‘s specific requirements. In addition to our standard cold mirrors you can use the coating enquiry form to conveniently get a price for your custom made cold mirror optics.


Customized heat reflecting hot mirror &
heat protecting filter coatings

Short pass filter, infrared reflecting, characteristic curve

Dielectric optical filters with high transmission in the visible and high reflection in the infrared are predominantly used to block heat or IR-radiation. These filter coatings can also be used as transparent reflectors in the infrared spectrum such as near infrared laser diodes. The cut-off wavelength, optical transmission and reflection ranges of the filters can be customized. In addition to our standard hot mirrors you can use the coating request form to conveniently get a price quote for your custom hot mirror coating.


Custom made electrically conductive
and optically transparent ITO-coatings

Indium-Tin-Oxide conductive coatings

Electrically conductive coatings with good optical transmission in the visible and with a defined electrical sheet resistance. The sheet resistance and transmission depend on the film thickness and can both be customized. Sheet resistances can be in the range from 5  Ω/sq. up to 10 kΩ/sq. The backside can be anti-reflective coated to reduce secondary reflections. ITO-coatings with a low surface resistivity can be used as infrared reflecting optics. In addition to our standard ITO-coated materials you can use the coating enquiry form to conveniently get a quotation for your customized ITO-coated material.


Other optical coatings

We are not limited to the optical coating services and capabilities described before. In addition to the coatings listed, the following thin film coated optics can be manufactured according to customer-specific specification:

  • Dichroic precision beamsplitter coatings
  • Color filters
  • Conversion filters
  • Dichroic Color filters
  • RGB-filter sets
  • Coatings for ultraviolet applications
  • Bandpass filters
  • Shortpass filters
  • Longpass filters
  • Coatings for lenses

In case you want a quotation for your custom coated optics, please just let us know your requirements. To process your inquiry as quickly as possible, we will need the following specifications and information:

  • Desired optical transmission(s)- and reflection(s) given in %
  • Specification of all relevant wavelength ranges in nm
  • Angle or range of angles of incidence
  • Desired substrate material, dimensions and required mechanical and optical precision
  • Temperature requirements and other specifications that are relevant for your application
  • Required quantity

If you have any further questions about our coating services and capabilities or if you need engineering assistance in designing your custom optical coating system for special applications, please do not hesitate to contact us.