Multilayer polymer film reflects chosen wavelength bands with a metallic luster

Oct. 29, 2015
Film can be used to hide IR sensors on metallic surfaces.

As noted in Tech-On!, Toray Industries (Tokyo, Japan) has unveiled new products in its "Picasus" series of films that realize a metallic luster without using a metal. The film does this using several hundreds or thousands of layers of different polymers that are alternately stacked.

In the new films, Toray made improvements to its polymer lamination technique and enabled the custom-controlled reflection of light over the visible to near-IR light band.

With the improved lamination technique, Toray reduced individual layer thickness tolerances from several tens of nanometers to several nanometers; as a result, the wavelength band within which reflectance changes from high to low or the reverse was narrowed by about 90%. The company developed three new products: near-IR light transmitting metallic luster, dichroic, and blue light cutting films.

"Metal" that transmits IR

The near-IR light transmitting metallic-luster film looks like metal but transmits near-IR light with a wavelength close to 950 nm. When used to cover IR sensors on TVs, appliances, faucets, and so on, it makes the entire product look metallic.

The dichroic film changes its color tone in accordance with view angle. Toray expects that it will be used for preventing labels from being counterfeited, as well as for ornamental use.

The blue-light-cutting film reflects only blue light, which is believed to cause eye strain and lack of sleep. It is used to block blue light emitted from a PC display, or smartphone screen.

The new films are already available for sale.


About the Author

John Wallace | Senior Technical Editor (1998-2022)

John Wallace was with Laser Focus World for nearly 25 years, retiring in late June 2022. He obtained a bachelor's degree in mechanical engineering and physics at Rutgers University and a master's in optical engineering at the University of Rochester. Before becoming an editor, John worked as an engineer at RCA, Exxon, Eastman Kodak, and GCA Corporation.

Sponsored Recommendations

Ask the Expert: Building Better Laser Micromachining Systems

Dec. 8, 2023
Dr. Cliff Jolliffe, Head of Strategic Marketing, Industrial Automation, Physik Instrumente (PI), fields questions about integrating controls for different motion systems and lasers...

Video: December 8, 2023 Photonics Hot List

Dec. 8, 2023
In this episode, we cover a microscopy method that hits uncharted cell territory, drone-based imaging for solar farm inspection, soliton microcombs that boost conversion efficiency...

China’s industrial laser market shows steady growth in turbulent times

Dec. 8, 2023
This in-depth market update focuses on trends in laser processing and industrial lasers while touching on what to expect in the ultrafast laser, fiber laser, LiDAR, and handheld...

What does it take to land venture capital for photonics-driven startups?

Dec. 7, 2023
Capital to grow a startup company can come from many sources: contract and non-recurring engineering (NRE) funding, angels and friends, customer upfront payments, and venture ...

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!