Brief Introcuction of Beam Splitter It can divide the laser/image/light source into two, Such as 50% penetration, 50% reflection, multi-layer film evaporation (non-metal film, so the absorption rate is very low).  

Beam splitters are common components in laser or illumination systems. Beamsplitters are also ideal for fluorescence applications, optical interferometry, or life science or semiconductor instrumentation.

it is also often used for Laser Application,Automatic Optical Inspection AOI,Imaging Equipment,Optical Equipment.