405nm带通滤光片（InGaN）

Use CWL 405 nm with 1–10 nm FWHM for 405 nm violet laser diode line selection, source cleanup, or detector-side isolation of a 405 nm laser signal.

405 nm violet laser diodes, including InGaN-based diode sources, are narrow-line sources compared with LEDs and lamps. For laser-line filtering, the key specs are CWL near 405 nm, FWHM such as 1 nm, 8 nm, or 10 nm, high transmission at 405 nm, and OD blocking across the unwanted wavelength range.

Use CWL 405 nm with 10–30 nm FWHM for most 405 nm LED systems that need a practical balance between violet output cleanup and usable signal.

405 nm LEDs have broader emission than laser diodes, so 10 nm, 20 nm, or 30 nm FWHM options are often practical for illumination, fluorescence excitation, inspection, and exposure systems. Use 40–55 nm FWHM when the setup needs more violet-region output and can accept broader wavelength selection.

Use CWL 405 nm with 20–50 nm FWHM to select a practical violet band from xenon, mercury-xenon, halogen, or other broadband UV-visible sources.

For broadband illumination, the filter extracts a 405 nm-centered band from a wider spectrum. Use 20–30 nm FWHM when the setup needs a more defined violet band. Use 40–55 nm FWHM when higher transmitted signal is more important for illumination, imaging, or detection.

Use CWL 405 nm with 20–50 nm FWHM for violet excitation channels such as DAPI/Hoechst-type nuclear stains or Brilliant Violet/Pacific Blue-type fluorescence channels.

For fluorescence microscopes, flow cytometers, or fluorescence detection systems, the 405 nm filter is usually placed on the excitation side before the sample. Match the excitation filter with the light source, dichroic mirror, and emission filter set. The emission-side filter should be centered at the actual emission band, not automatically at 405 nm.

Use CWL 405 nm with 20–50 nm FWHM or wider for 405 nm resin exposure, photopolymer systems, UV/violet adhesives, coatings, or exposure setups.

For exposure applications, the filter defines the violet irradiation band delivered to the material. Select the FWHM based on the source spectrum, required irradiance, material sensitivity near 405 nm, and out-of-band blocking requirement.

etector-side 405 nm signal isolation
Use CWL 405 nm with 1–20 nm FWHM before a silicon photodiode, CMOS/CCD camera, PMT, or UV-visible spectrometer when the target signal is near 405 nm.

For detector-side filtering, the filter should pass the 405 nm signal while reducing unwanted background outside the target band. Use 1–10 nm FWHM when stronger wavelength isolation is needed. Use 20 nm FWHM or wider when signal throughput is more important.