3.6L: LateNews Paper: High Transmission and High Contrast PBS for Mobile Projection Applications

Abstract

We report the development and the successful product launch of a new 3M Polarizing Beam Splitter, 3M PBS-A, which enables high performance optical engines for Liquid Crystal on Silicon (LCOS) projectors. This PBS-A has typical effective transmission of 94% of polarized light with a double pass contrast of around 1500:1. Recent developments in contrast performance, incident angle dependency, and thermal stability are reported.

54‐1: Improved Polarizing Film for PBS Applications in HMDs

“…For projection applications utilizing our PBS film, we previously recommended, "The incoming light from the light source should go through the input prism first, otherwise DPCR [double-pass contrast ratio] will be reduced to one-third." (9) Our most recent design of the 3M reflective polarizer has only a small difference in optical performance based on input side of the PBS. There is a measurable difference for Tp but even in the worst state, the Tp leak is still less than 1 part out of 5000.…”