May 25, 2021 MaterialParts

Wire Grid Polarizer Film WGF™

Asahi Kasei Corporation

Unlike the conventional absorptive polarizers, WGF™ is a reflective polarizer. Due to the property, WGF has been used as a PBS for AR Glass using LCOS. Also lens using WGF achieves a brand-new optical system, which is called "Pancake Lens".

What’s WGF™?

WGF™ is the world's first film-based wire grid polarizer. Its Aluminum wire grid structure brings a high polarization separation performance in a wide range of wavelength not only VIS but Infrared(IR) or longer. Furthermore, it has excellent heat resistance compared to absorptive polarizers. Unlike the conventional absorptive polarizers, WGF™ is a reflective polarizer, which passes through P-wave and reflects S-wave and barely absorb heat. This property is useful for not only reflective use such as PBS, but also applications which require high temperature durability such as automotive use or inspection tools using strong light intensity.

Features

- Reflective polarization film with low heat absorption
- Low AOI dependence
- Wide effective range from VIS to IR or more
- Flexible and excellent processability
- Excellent reliability for high temperature and humidity. e.g.: 105 deg C or 60 deg C x 90%RH

PBS(Polarizing Beam Splitter) for AR Glass

WGF™ is used in combination with other materials due to its good processability. The best example is a cube PBS with WGF™ sandwiched between glass prisms. LCOS is used for the AR Glass display, then a beam splitter is essential due to its optical structure. WGF™ PBS has been used by many manufacturers for several years because it is less dependent on AOI and has high heat resistance.

Reflective Polarizing Lens for VR

It’s been an issue for long time to downsize VR head-set. Optical design with Pancake Lens, which can make a head-set smaller, will be probably standard in next generation. We have succeeded developing WGF™ lens and been getting requests from several VR head-set developers. Try our brand-new optical lens now!

Asahi Kasei Corporation

WGF™ is the world's first film-based wire grid polarizer. Asahi Kasei is the one and only developer who succeeded in development of film base wire grid polarizer, and established mass production technology of nano-imprinting at an early stage and has been supplying WGF™ since the 2000s.

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