WGF™ Polarizing Beam Splitter (PBS): Film-Based Wire Grid Polarizer by Asahi Kasei

Asahi Kasei's WGF^TM Polarizing Beam Splitter (PBS) has been created with WGF^TM- film-based wire grid polarizer. WGF^TM displays a high polarization separation performance in an extensive range of wavelengths, not only VIS but IR or longer.

Its features include stability of the optical performance even at a wide angle of incidence (AOI), and this PBS has been commercially available since AR glasses was launched. Also, it is beneficial for telecentric optical systems, coaxial epi-illumination-optical systemsor examining devices utilizing the same PBS.

WGF^TM is film base, and hence PBS can be manufactured by sandwiching WGF^TM between two prisms. It is also possible for users to freely select glass materials that have a specific refractive indexor size. For instance, the company can offer users PBS measuring around 50 mm.

Extinction Ratio: 180 : 1, Average of 450～650 nm AOI 45±18 deg

Size: Approximately 5～50 mm or more

Construction: Cube (basically)

Clear Aperture: Efficient in all areas except for 1.0 mm from the edges

AR Coating: Available on four surfaces

If you are already using a half mirror, you can expect an improvement in brightness by replacing it with WGF™ PBS andλ/4-Plate.　By using the WGF^TM camera filter in front of the sensor (camera) and adjusting the polarization axis angle with the rotating frame, it is also possible to adjust the light intensity.　

Image co-taken with Fraunhofer IFAM