442 nm Long-Pass Dichroic Filter

The MP-LWP-442 is a high-performance dichroic long-pass filter designed specifically for Raman spectroscopy, super-resolution imaging, and total internal reflection fluorescence (TIRF) microscopy. Manufactured on fused silica substrates with precision dielectric coatings, it efficiently reflects the 439-457.9 nm band while maintaining high transmission from 466.1 nm to 1200 nm at a 45°angle of incidence. The filter features a steep spectral cut-on edge, a broad transmission range, excellent wavefront quality, and a high laser damage threshold, making it ideal for efficient separation of laser excitation light from Raman, fluorescence, or imaging signals.