680 nm Narrow Bandpass Optical Filter

The MP-NBP-680 is a high-performance narrow bandpass filter designed for transmission around the 680 nm region, primarily used for selective transmission of specific red-light wavelengths and broad out-of-band rejection. The filter transmits mainly in the range of 673.5-686.5 nm with an average passband transmittance Tavg > 93%, ensuring high utilization of the target optical signal while effectively reducing background light and stray light from other wavelength bands. The product provides deep blocking with ODavg > 5 over 300-656 nm and 705-1050 nm, and achieves an exceptional blocking depth of ODavg > 8 in the 490-636 nm region, offering outstanding out-of-band suppression. The filter adopts a standard Ø25 mm circular design and is suitable for fluorescence detection, Raman spectroscopy, spectral analysis, narrowband imaging, photoelectric detection, and scientific research systems.