518nm Notch Optical Filter

The 518nm Notch Negative Filter (Band-Reject Filter) is a high-performance optical component designed to precisely block 518nm excitation or stray light while transmitting other wavelengths with high efficiency. Its concave spectral profile enhances the signal-to-background ratio, ideal for Raman spectroscopy (blocking excitation light and transmitting Stokes/anti-Stokes signals), fluorescence microscopy, biomedical imaging, and laser protection systems. Featuring OD6 deep blocking, >90% broad-band transmission, and robust environmental stability, it employs hard-coating technology for durability in extreme temperatures and corrosive conditions. Customizable bandwidth and transmission curves are available to meet stringent requirements in research, medical, and industrial applications.