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High-Performance Bandpass Filters from China Suppliers | Factory Direct MultiIR Solutions for Optimal Transmittance
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The above list shows our current stock items.
If you don't see what you are looking for, please contact us.
Frequently Asked Questions (FAQ)
What is the standard delivery size for these visible light bandpass filters?
Our standard stock filters support dimensions ranging from Φ0.1 mm up to 300 mm. Custom dimensions can be tailored according to your specific application requirements.
What do CWL and HPB indicate in the optical filter specifications?
CWL stands for Center Wavelength (measured in nanometers), which defines the peak transmission point. HPB refers to Half Peak Bandwidth, signifying the spectral width of the filter at 50% of its maximum transmission.
What is the difference between OD4 and OD6 cut-off depth?
Optical Density (OD) defines the blocking level of out-of-band light. OD4 filters reduce stray light transmission to 0.01% (1e-4), while OD6 filters provide a higher blocking performance down to 0.0001% (1e-6), ideal for high-sensitivity fluorescence detection.
Are these filters suitable for fluorescence imaging applications?
Yes, many of our listed filters are specifically designed for fluorescence systems (e.g., FAM Ex, FAM Em, Hex Ex, Rox Em, Cy5 Ex). They offer high peak transmission (Tp > 90%) and deep out-of-band blocking to ensure high signal-to-noise ratios.
How can I request custom center wavelengths or dimensions?
If you cannot find your required configuration in our stock table list, you can click the "contact us" link to submit your custom specifications, including Center Wavelength (CWL), Bandwidth (FWHM/HPB), dimension limits, and blocking requirements.





