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The transparency range of optical cements used to assemble cube beamsplitters limits their spectral application, roughly to between 200 nm and at the best up to 3000 nm. Plate beamsplitters do not require assembly and their applications are only limited by the transparency of the selected substrate. For example, if ZnSe is used as the substrate, then designs of beamsplitters that operate over range from 400 nm up to 15 are possible. They can be made to split light intensity only (INTENSITY), or to pass one or more spectral bands and at the same time reflect some other parts of the spectrum (DICHROIC), or to pass one state of polarization and reflect another (POLARIZING), or finally to split light without introducing SIGNIFICANT polarization effects (NON- POLARIZING). Any combination of two or all types of beamsplitters is possible in a single device. Plot below shows spectral performance of the plate beamsplitter that can be classified as dichroic since it divides VIS and 1310 nm light and as intensity beamsplitter for 1064 nm.

All Cascade Optical Corporation's Dielectric coatings pass MIL-C-48497 and can be made to pass even the severe abrasion requirements of MIL-C-675. We have on site trained Lab Technicians and our own fully functional internal test Lab department to verify each and every subsection of the above requirements.