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Custom Optical Coatings

Overview about our coating capabilities and types of thin film coatings

In addition to our numerous standard thin film components we are manufacturing custom optical thin film coatings to customer's exacting requirements. The following overview presents a summary about the most common types of coatings we are manufacturing. We coat these optical coatings mainly on plane optical substrates but depending on the details of the application it is also part of our capabilities to coat lenses and precision optics. Please follow the links to our coating inquiry form to conveniently enter the characteristics of your required customized coatings and to place a request:

Metallic & dielectric mirror coatings

Characteristic reflection curve

This are optical coatings with mainly reflecting properties and high imaging quality. These can be based on all-dielectric or on metallic coatings like aluminum, enhanced aluminum, silver, enhanced silver, gold, chrome, copper, or platinum. The optical reflection, angles of incidence, polarization, and most other characteristics can be fabricated according to custom requirements. In addition to our standard mirror coatings you can use our custom optics enquiry form to conveniently request a quotation for your customized mirror coating.


Beamsplitters & partially transmitting coatings

Characteristic beam splitter curve

Such optical coatings are 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 dividing-ratio can be adjusted to customer’s specification by modification of the layers. The backside can be anti-reflection coated to minimize unwanted secondary reflections and to prevent energy loss. In case you can't work with our standard beamsplitter coatings please use our custom thin film coatings enquiry form to conveniently get a quotation for your customized beamsplitter design.


Single & multilayer anti-reflection coatings

Characteristic transmission curve

These thin film coatings minimize or eliminate unwanted reflections and ghost images or double laser beams which 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 often increased by the same level the rest reflection is decreased. Besides our standards of anti-reflection coatings you have the opportunity to conveniently request a quotation for a custom coating by using our coating inquiry form.



Cold mirrors, coatings for lighting applications

Long pass filters, cool light reflectors

This are dielectric optical coatings with a high reflection 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 light beam or an 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 designed cold mirror optics.


Hot mirrors and heat-reflecting coatings

Short pass filter, infrared reflecting, characteristic curve

Such dielectric optical filters with high transmission in the visible and high reflection in the infrared range are predominantly used to block heat and IR-radiation. These filter coatings can also be used as reflectors for the infrared spectrum such as NIR-laser-diodes (eye-tracking e.g.) while being transparent in the visible. The cut-off wavelength, optical transmission, and reflection ranges of the filters can be customized. In addition to our heat-reflecting standard hot mirrors you can use our coating request form to conveniently get a price quote for your hot mirror coating custom design.


ITO-coatings, electrically conductive and transparent layers

Indium-Tin-Oxide conductive coatings

These electrically conductive coatings have good optical transmission in the visible and a defined electrical sheet resistance. The surface 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. 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 our coating enquiry form to conveniently get a quotation for your customized ITO-coated material.


Other optical coatings

We are not limited to the coating categories and capabilities described before. In addition to the coatings listed we are manufacturing the following additional thin film coatings to customers specification:

  • Dichroic precision beamsplitter coatings
  • Color filters
  • Conversion filters
  • Dichroic Color filters
  • RGB-filter sets
  • Coatings for ultraviolet light
  • Bandpass filters
  • Short-pass filters
  • Long-pass filters
  • Coatings for lenses

In case you want a quotation for a custom coating please let us know your requirements. To process your inquiry without delay we will need to have the following specifications and information:

  • Desired transmission(s) & reflection(s) in percent
  • Specifications of all relevant wavelength ranges in nm
  • Angle of incidence or range of angles
  • 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 question about our coating capabilities or if you need engineering assistance in designing your custom coating please do not hesitate to contact us.