Design of large acceptance angle polarizing beam splitter for laser-based displays

Abstract

The performance of broadband polarizing beam splitters (PBSs) is sensitive to the incident angle. By taking account of the spectrum of the laser source and using the needle optimization method, a large acceptance angle PBS for laser-based displays is designed. The average degrees of polarization in transmission and reflection can reach 0.989 and 0.980 for an acceptance angle of 13.6° in air using two materials, while better results of 0.993 and 0.989 for an acceptance angle of 14.8° in air are attained when three common materials are used. Both designs consist of 40 layers.

Keywords

Average Degree / Merit Function / Polarize Beam Splitter / Acceptance Angle / Refractive Index Material

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