Notch Filter High Transmission Bandstop Filter for Raman Spectroscopy

Like an optical scalpel, it deeply cuts off only a specific narrow band (such as a specific laser wavelength), while causing almost no damage to adjacent wavelengths.

Optical density can reach OD 4 to OD 6+ (blocking rate of 99.99% to over 99.9999%), effectively preventing strong lasers from damaging sensitive detectors (such as CCD/CMOS).

Unlike traditional absorption filters, it has extremely high light energy utilization in non-target wavelength bands, ensuring overall imaging or detection brightness.

The bandwidth from the high transmittance region to the deep cutoff region is extremely narrow, allowing the detection of signals very close to the target blocking wavelength.