Bandpass Lens Filter 808 nm, Select your size, 808 nm peak wavelength, useful range between 778-838nm, useful range FWHM: 60 (±5 nm)

The Bandpass Lens Filter 808 nm is designed for near-infrared (NIR) imaging, transmitting light at its 808 nm peak wavelength while blocking unwanted wavelengths outside the 778–838 nm useful range.

It attaches directly to a standard machine vision lens using the built-in front filter thread, providing a secure and reliable mounting interface.

With a wide range of available thread sizes, the BP808 integrates seamlessly with many lens formats, ensuring stable optical performance in demanding NIR inspection environments.

Overview of the BP808 Narrow Bandpass Filter

Narrow bandpass filters transmit only a selected portion of the spectrum while suppressing all other wavelengths.  

In the case of the BP808, transmission exceeds 90% at the 808 nm peak, and remains above 80% throughout the 778–838 nm useful range. 

This corresponds to a 60 nm FWHM (±5 nm), giving the filter a broader passband ideal for high-efficiency NIR illumination and detection.

Specification
Filter type	Narrow Bandpass
Peak wavelength	808 nm
Peak wavelength color	NIR (Near-Infrared)
Useful wavelength range	778-838 nm

Available Thread Sizes for the BP800 Lens Filter

Because lenses come in different sizes, the BP800 filter is available in several standard thread options, making it suitable for both compact and larger lenses.

• C-mount filter

• 0.5 thread (pitch): M22.5×0.5, M25.5×0.5, M27×0.5, M30.5×0.5, M34×0.5, M35.5×0.5, M37×0.5, M37.5×0.5, M40.5×0.5

• 0.75 thread (pitch): M37×0.75, M43×0.75, M46×0.75, M49×0.75, M52×0.75, M55×0.75, M58×0.75, M60×0.75, M62×0.75, M67×0.75, M72×0.75

Using the BP808 with a C-mount (CMT) Filter Interface

The BP808 can also be installed inside the C-mount interface—ideal for lenses without a front filter thread or for compact setups where front-mounting is not practical.

If you plan to install the filter inside the C-mount interface, simply fill out the form below to get instant access to the mounting guide and lens compatibility information.

Bandpass Lens Filter 808 nm: Near-Infrared Imaging Applications

By isolating the 808 nm NIR band, the BP808 improves clarity, minimizes visible-light interference, and supports higher-precision feature analysis across a range of imaging environments.

This makes it ideal for systems that rely on near-infrared illumination to highlight details that conventional lighting cannot reveal.

Key advantages with monochrome cameras:

Reveals features hidden under visible light

Boosts detection of faint or low-contrast textures

Performs well in outdoor or fluctuating lighting

Suppresses ambient visible-light contamination

Benefits when used with broadband sources:

Stronger contrast across the NIR spectrum

Better differentiation of subtle material variations

Improved imaging consistency

Reduced reflections from glossy or metallic surfaces

With these benefits, the BP808 is a powerful tool for industrial inspection, biometric identification, laser-illumination systems, material classification, and other NIR-enhanced machine-vision applications.

Integrating the BP808 into Machine Vision Systems

Most machine vision lenses include a front-mounted filter thread, allowing the BP808 filter to be attached directly.

If you are using a C-mount lens on a GigE camera or USB3 camera, the filter can also be placed inside the C-mount connection instead of on the front of the lens.

Installed between the camera and the lens, the filter remains fixed within the optical path, ensuring stable alignment and consistent image performance.

These versatile mounting options make the BP808 easy to integrate into nearly any machine vision setup.

800 nm Bandpass Filter: Advantages

Designed for precision near-infrared imaging, the BP808 provides highly selective wavelength transmission and consistent optical performance, making it suitable for demanding inspection and measurement tasks.

• • High transmission at the 808 nm center wavelength
  • Strong blocking of visible and out-of-band NIR light
  • Superior contrast enhancement in the 808 nm spectral region
  • Stable optical behavior under variable illumination
  • Reliable, repeatable performance for precision NIR imaging

Find the BP808 Filter Best Suited to Your Optical Setup

Select the BP808 narrow bandpass lens filter in the thread size that fits your lens. For assistance choosing the right size or wavelength, contact our technical team.