Black epoxy coatings

Maximizing Optical Excellence with Black Epoxy Coatings

Elevating Optical Performance with Tailored Solutions / Customized Coating Solutions for Superior Performance

Black coatings are essential for optical applications such as telescopes, cameras, spectrometers, and laser systems, serving to suppress stray light and minimizing optical reflections. These coatings are engineered with materials that exhibit high absorption across a broad spectral range and are applied to surfaces within optical systems to minimize unwanted light. This significantly enhance image quality, measurement accuracy, and overall system performance. In comparison to other coating types, black epoxy coatings stand out for combining optical performance, versatility, and cost-effectiveness and can be efficiently applied with a variety of standard dispensing methods.

They are particularly effective in high-volume applications and deliver reliable coating performance while maintaining consistent optical properties. Whether for facilitating apertures in imaging and sensing systems, minimizing stray-light in augmented reality waveguides or advancing precision in scientific instruments, black epoxy coatings offer a robust solution for diverse optical challenges.

A unique set of product properties

DELO has developed a new class of black epoxy coatings with unique key features:

  • High optical density and homogeneity: Achieving > OD 1 / µm
  • Low curing temperature / UV-curing: Curing as low as 100 °C
  • Thin layer application: layer thickness < 10 µm
  • Combining material and process: jetting, screen-printing, spray-coating
  • Matte surface for minimum reflection at coating interface
  • High Durability and strong adhesion
  • Surface-dry
  • Solvent-free
  • Cost-effective high-volume manufacturing solution

Application areas

Explore the innovative possibilities offered by black epoxy coatings, a cutting-edge solution for advanced optical applications. Ideal for enhancing the performance of:

  • Time-of-flight-sensors (ToF)
  • AR (Augmented Reality) Waveguide edge blackening
  • Screen-printable apertures
  • Sidewall coating

Edge blackening with jettable black epoxy coatings

Benefits of edge blackening

  • precise & contactless dispensing on edges
  • homogeneous distribution of coating
  • process automation
  • UV curing for fastest process or UV heat curing for highest optical density

     

Example application:

Application in AR waveguides and optics coating (lenses, filter)

Video: AR Edge Blackening | Revolutionary AR Display Process by NSW Automation & DELO

Watch the video to discover how we're making mass production of customized AR optics truly scalable.

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The benefits of screen-printable black epoxies as coatings for optical systems

The ability to structure black epoxy coatings through screen-printing offers many additional advantages for optical component manufacturing. Screen-printing is a well-established high-volume manufacturing process and enhances coating versatility and adaptability in advanced optical systems.

  • High volume manufacturing: Parallel processing, higher process speed, fast curing
  • Flexibility: Precise patterning, customizable designs
  • Easy integration: Ease of use, scalability 

     

Example application:

Screen-printable apertures

Spray-coating of black epoxies for large area coatings on complex geometries

Benefits and applications of spray coating

  • uneven surfaces
  • fast dispensing
  • layers < 10µm

     

Example application:

sidewall coating for optical sensors

Are you looking to elevate your optical systems with our black epoxy coatings, or do you have questions about their applications in advanced optical technologies? 

Reach out to our experts today for tailored solutions.

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More Information

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Black Coatings for Optical Components

 

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