Our broadband dielectric beamsplitters are designed to provide general purpose laser beamsplitting and combining for visible through near infrared applications. Each coating is essentially achromatic across a wide spectral band so that a single optic will work for the entire range of a particular tunable laser, for several laser diode wavelengths, or for most visible laser wavelengths. The precision optical substrate has a dielectric beamsplitter coating on the front surface. The back surface is antireflection coated to prevent ghosting. A slight wedge in the substrate virtually eliminates internal fringes. S-polarized beams will be equally split with R/T = 50/50 at 45° incidence.

A p-polarized beam yields a split of R/T = 30/70. In unpolarized light, the performance is typically R/T = 40/60. These beamplitters are available in either N-BK7 for general use, or UV grade fused silica for optimal wavefront and thermal stability. Coating options cover the visible to near infrared regions.