The 730nm filter is a near-infrared narrow bandpass filter with a center wavelength precisely at 730nm, a bandwidth typically between 10–40nm, a peak transmittance of over 90%, and an out-of-band blocking depth of ≥OD4, effectively isolating environmental stray light. It is manufactured using multi-layer hard-coating ion sputtering technology, featuring dense film layers, high damage threshold, long-term stability, and a surface quality meeting the 40-20 scratch-dig standard.

Main function: It allows only a very narrow range of infrared light around 730nm to pass while blocking visible light and other infrared bands, enabling high-precision spectral selection.

Typical Applications

• Chlorophyll Fluorescence Detection—Research on plant photosynthesis and agricultural remote sensing

• Biomedical Imaging—Deep tissue imaging, reducing scattering and autofluorescence interference

• Laser Systems—Purification and wavelength selection for 730nm laser diodes

• Fluorescence Microscopy—Matching near-infrared fluorescent dyes such as Cy7 and Alexa Fluor 750

• Dual-Wavelength Raman Spectrometers—Collaborating with 830nm for multi-band analysis