Your Best Custom Dual Bandpass Filter China Manufacturer

A dual band bandpass filter is an optical filter that allows two specific wavelength ranges of light to pass through efficiently while strongly blocking all other wavelengths.

A regular bandpass filter has only one transmission peak and is used for detecting a single target signal, typically for spectral separation or single-channel fluorescence imaging.
A dual bandpass filter has two independent transmission peaks and can detect two different wavelength signals simultaneously, making it suitable for multi-fluorescence imaging or dual-color sensing systems.

Dual bandpass filters are ideal for applications that require simultaneous capture of two signals, such as multi-fluorescence labeled microscopy, dual-band machine vision sorting, dual-channel biomedical immunoassays, dual-band astronomical observation, and dual-wavelength laser systems.

When selecting a dual bandpass filter, consider the following:

• The center wavelengths must match the emission and absorption peaks of the target signals.

• The bandwidths are usually narrow, and the blocking depth should be OD6 or higher to effectively suppress stray light.

Yes, we support custom dual-wavelength designs across the UV to IR range, with bandwidth options from ±2nm narrow band to ±50nm wide band, depending on signal requirements. We can also ensure blocking depths of OD6 or higher.