The BP145B2 from Thorlabs Inc is a Ø1" Pellicle Beamsplitter that covers wavelengths from 700 nm to 900 nm. This Non-Polarizing BeamSplitter virtually eliminates ghosting since the second surface reflection is superimposed on the first one. However, they are extremely fragile due to the nitrocellulose membrane being only a few microns thick. It has a Splitting Ratio (R:T) of 45:55 with a Minimal Change in Optical Path Length. It is available in a coated version and can be used where chromatic dispersion must be minimized (i.e., cases where focused beams are necessary).