473 nm Raman Dichroic Beamsplitter

The 473 nm Raman dichroic beamsplitter is a high-performance dichroic filter specifically designed for 473 nm laser-based Raman spectroscopy systems. Operating at a 45°angle of incidence, it efficiently reflects the 473 nm laser line while providing high transmission for Raman scattering signals over the 486.6-1200 nm range, effectively separating the excitation light from the Raman signal. The filter achieves an average transmittance greater than 93% over the 486.6-1200 nm band, and its reflection band covers 350.0-478.0 nm, with stable reflectivity for both s- and p-polarized light over 457.9–478.0 nm, ensuring reliable delivery of the 473 nm laser to the sample path and efficient collection of the longer-wavelength Raman signals to the detector. Manufactured on high-purity fused silica substrates, the filter offers excellent optical homogeneity, low autofluorescence, and high environmental stability. Its surface figure meets the requirements for super-resolution and TIRF microscopy, making it suitable for Raman spectroscopy, microscopic imaging, and precision laser detection systems demanding high wavefront quality, imaging resolution, and optical path stability.