685nm Long-Pass Dichroic Filter

The 685 nm long-pass dichroic filter is primarily designed to achieve efficient separation between laser excitation light and longer-wavelength signal light. Employing a spectral design that reflects short wavelengths and transmits long wavelengths, it effectively reflects the laser and its short-wave side spectrum while maintaining high transmission for long-wave signals. The filter features good edge transition characteristics and polarization adaptability. Optimized for Raman spectroscopy and high-resolution optical applications, it uses a fused silica substrate and is suitable for 45°incident optical paths, meeting the demands of super-resolution imaging, TIRF, Raman spectroscopy, fluorescence imaging, laser analysis, and precision research optical systems.