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Case study

Bayfol® HX film enables laser protection eyewear for pilots

Exposure to laser light can seriously distract or injure pilots during takeoff or landing, and the frequency of incidents is rising. Bayfol® HX film enabled Metamaterial Inc. (META™), a smart materials company, to create the world's first laser protection eyewear for pilots called metaAIR®, gaining an industry-first approval from an aircraft supplier.
An aeroplane taking off and being glared with a laser pointer
Task

Provide a material for a holographic optical filter to protect pilots

Over 40,000 laser incidents were reported in the last five years in the US, the UK and Canada alone. Partnering with Airbus, META™ needed to find the right specialty photopolymer film for a holographic optical filter to protect pilots from harmful green 532 nm wavelength laser lights, which account for more than 90% of aviation laser attacks. This film embedded into protection glasses also needed to allow pilots to see instrument and runway lights without color distortion while meeting aviation industry standards. 

Challenge

Customize Bayfol® HX film to meet anti-laser challenges

After considering many specialty materials and technologies, META™ selected Bayfol® HX photopolymer film, and worked with us to customize it in order to meet three challenges. First, the raw material had to cover areas of at least 1m in width and several meters in length. Next, the film and its photopolymer coating had to provide high optic diffraction and transparency, along with color-balanced red-green-blue (RGB) filtering. Finally, it had to retain stability when matched with other materials such as adhesives, coping with varied temperatures and humidity. 

Solution

Bayfol® HX120 film deflects laser light without color distortion

Fine-tuning the film properties in several production runs, the refined Bayfol® HX120 film enabled META™ to design the effective laser protection eyewear product metaAIR®. In wide format web rolls with triacetate (TAC) substrate, the film can be recorded with laser light in the 440 nm to 680 nm wavelength range, achieving 99.999% diffraction efficiency to protect pilots from harmful laser attacks. With the volume holographic optical element (vHOE) recorded in the film, natural color is preserved, with high transparency and stability. 

Bayfol® HX120 properties were tailored to meet our customers’ high standards. The technical team from Covestro understood our requirements. Today, META™ can deliver high performance holographic components and products from idea stage to manufacturing, working closely with Covestro to meet our customers’ needs.

Oshrit Harel

Manager, R&D and Materials, Metamaterial Inc. (META™)

Eye protection against laser strike for pilots without loss of color perception and of clarity

  • Powerful deflection  Filters harmful laser light while retaining high optical properties for “see-through” quality.
  • Natural colors  Broadband sensitization allows multiplexing of multiple notches, so colors appear natural.
  • Wide recording area  Large-scale rolls allow wide-area scanned recording (patented by META™).
  • Easy production  Dry coat photopolymer enables high volume production with no wet chemistry.
  • Multi-layering  Bayfol® HX120 can be recorded with a hologram and then stacked with additional holograms or other functional films.
  • Variety in design  Film can be integrated into flat or cylindrical lenses, displays and more.

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Bayfol HX_Holographic films
Bayfol HX for optical filter applications

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