The BSBK Series is a professional line of 1064nm Plate Beam Splitters manufactured from high-quality BK7 Grade A optical glass. These optics are designed to precisely split incoming laser beams at a 45° angle of incidence (AOI), delivering a stable 50% reflection (Side 1) for S-polarized light. Whether you are building a complex laser marking system, setting up an interferometer, or need a reliable beam sampler, the BSBK series offers the precision and durability you need.