The 532 nm notch filter is a band-stop optical component that efficiently transmits a broad spectrum from 400–1200 nm while attenuating the 532 nm laser line to below OD4–OD6 (<0.01%), with a typical stopband FWHM of 10–30 nm. It employs all-dielectric hard coatings with anti-reflection backside coating, featuring dense, drift-free, scratch-resistant, and laser damage-resistant (1 J cm?2@10 ns) layers, and is mounted in a black anodized ring for easy system integration and positioning. Main applications:

• Raman spectroscopy: Deeply blocks the 532 nm excitation laser line to enhance the signal-to-noise ratio of Stokes signals

• Laser protection: Used for observation windows, goggles, or camera fronts to block green laser glare and prevent sensor saturation

• Fluorescence imaging: Eliminates 532 nm pump laser scatter while preserving fluorescence signals

• Astronomy and remote sensing: Suppresses atmospheric glow or laser beacon interference to improve detection sensitivity

The product is available in multiple specifications from ?12.5–50 mm, with customizable bandwidths, sizes, and higher OD versions. It is a core component for achieving high-precision measurement and safe operation in scientific research, medical, and industrial laser systems.