673 nm Narrow Bandpass Optical Filter

The MP-NBP-673 is a high-performance narrow bandpass filter designed for transmission around the 673 nm region, suitable for optical systems that require efficient selection of specific red-light wavelengths and strong out-of-band rejection. The filter primarily transmits in the range of 667.5-678.5 nm with an average passband transmittance Tavg > 90%, ensuring high throughput of the target light. At the same time, it provides deep blocking on both sides of the passband, effectively reducing the influence of non-target wavelengths, background light, and stray light on the detection system. The product adopts a standard Ø25 mm circular design with a clear aperture of ≥22 mm, offering a large effective optical area and good mechanical compatibility. It is suitable for fluorescence detection, Raman spectroscopy, spectral analysis, narrowband imaging, optoelectronic sensing, and scientific research applications.