Bandpass Filters

Bandpass filters are critical optical components that enable precise spectral control by selectively transmitting light within a defined wavelength range while blocking unwanted wavelengths. They play a vital role in enhancing signal clarity, improving contrast, and enabling accurate spectral separation across a wide variety of applications, from biomedical imaging to industrial sensing and remote monitoring.

Designed for diverse technologies and environments, Materion's bandpass filters deliver high transmission efficiency, steep spectral edges, and robust blocking performance. Their advanced all-dielectric coatings and customizable substrates ensure long-term stability, environmental resilience, and optimal performance in demanding conditions.

NARROW BANDPASS FILTERS

Providing sharp spectral selection with passband widths ranging from 2 to 20 nm and blocking depths up to OD5. These filters offer low loss in the passband and excellent environmental stability, making them ideal for laser line filtering, multispectral imaging, and sensitive spectral detection in industrial and scientific applications.

RED BANDPASS FILTERS (600–750 nm)

Providing durable, high-transmission dielectric coatings tailored for optical sensors requiring selective transmission in the visible red spectrum. These filters block undesired ambient and NIR radiation, enhancing signal clarity in applications such as optical ranging, factory automation, and safety systems.

NIR BANDPASS FILTERS (800–1100 nm)

Designed for optical sensor applications, NIR bandpass filters selectively transmit near-infrared signals while blocking ambient visible and longer-wavelength infrared light. Their superior signal-to-noise ratio and spectral stability enable accurate distance measurement, range finding, and automotive sensing under varying environmental conditions.

SWIR BANDPASS FILTERS

Standing out with a unique self-blocking design, SWIR bandpass filters combine wide blocking ranges with high passband transmittance in a single all-dielectric coating. Suitable for spectral sensing and imaging with InGaAs or HgCdTe detectors, they offer long-term spectral stability and resistance to harsh terrestrial and space environments. Applications include NIR Raman spectroscopy, plasma diagnostics, fiber optics transmission, and atmospheric monitoring.

BIOPHOTONICS BANDPASS FILTERS

Engineered for fluorescence and Raman detection, these filters feature steep transitions between blockband and passband with high transmittance (>90%) outside the blockband. Deposited by plasma-assisted processes, they exhibit exceptional environmental stability and are optimized for excitation filtering in LED and laser-based biophotonic systems.

Our bandpass filters can be precisely tailored in terms of center wavelength, bandwidth, substrate material, and size to meet specific customer requirements. Their robust coatings and substrates ensure consistent, high-performance results, empowering your optical systems with enhanced precision, efficiency, and reliability.