Hi:
1-What causes polarization coating (the hypogenous interface) of a Polarizing Beam Splitter Cube go bad and sometimes delaminated? I could think of humidity+temperature.2-Do you of any company and supplier who have Polarizing Beam Splitter Cubes without this problem? We'd like BPS Cube to have a "3 deg fielField of View" and " Extinction Ratio
500". Operating Wavlength is ~900nm
Your supplier suggestions and comments are greatly appreciated.