905nm带通滤光片

905nm 光属于近红外光谱，具有良好的大气穿透性、较低的眼部安全风险，并且由于其能够穿透某些材料并避免强烈的可见光干扰，因此适合用于距离测量和传感。

905 nm pulsed laser diode

Use CWL 905 nm with 6–10 nm FWHM for 905 nm laser diode line selection, source cleanup, or narrow isolation of a 905 nm laser signal.

905 nm pulsed laser diodes are commonly used in rangefinding, optical sensing, and time-of-flight systems. For laser-line filtering, the key specs are CWL near 905 nm, FWHM such as 6 nm or 10 nm, high transmission at 905 nm, and OD blocking across the unwanted wavelength range.

905 nm NIR LED or LED array

Use CWL 905 nm with 30–55 nm FWHM for NIR LED illumination, source cleanup, or practical 905 nm-region output.

905 nm LEDs have broader emission than laser diodes, so medium or broad filters are usually more practical than very narrow filters. Use 30–40 nm FWHM when the setup needs stronger wavelength selection around 905 nm. Use 50–55 nm FWHM when the system needs more usable NIR output.

Broadband NIR source

Use CWL 905 nm with 30–85 nm FWHM to select a practical NIR band from tungsten-halogen, xenon, supercontinuum, or other broadband NIR sources.

For broadband NIR illumination or testing, the filter extracts a 905 nm-centered band from a wider spectrum. Use 30–40 nm FWHM when the setup needs a more defined NIR band. Use 50–85 nm FWHM when higher transmitted signal is more important for illumination, imaging, or detection.

Machine vision and NIR imaging

Use CWL 905 nm with 40–85 nm FWHM for machine vision or NIR camera imaging when the goal is broad 905 nm-region contrast rather than strict laser-line isolation.

For CMOS or CCD camera imaging, wider 905 nm-region filters can provide more usable signal for inspection, alignment, and contrast enhancement. Important specs include CWL, FWHM, transmission, and blocking of visible or unwanted NIR light that may reduce image contrast.

Detector-side 905 nm signal isolation

Use CWL 905 nm with 6–30 nm FWHM before a silicon photodiode, silicon APD, CMOS/CCD camera, or spectrometer input when the target signal is near 905 nm.

For detector-side filtering, the filter passes the 905 nm signal while reducing background outside the target band. Use 6–10 nm FWHM when stronger wavelength isolation is needed. Use 20–30 nm FWHM when signal throughput is more important.