The Longpass Lens Filter 470 nm is a lens filter engineered to transmit wavelengths above 470 nm, offering a functional spectral range from roughly 456 to 1000 nm, while blocking shorter wavelengths. It attaches directly to a machine vision lens using the standard filter thread. By blocking unwanted light below the cutoff point, the filter improves contrast and makes features easier to see, even in challenging lighting. A wide selection of thread sizes is available to ensure compatibility with both compact and larger-format lenses. How the LP470 Longpass Filters Work A longpass filter blocks light below a defined cutoff wavelength and allows light above that point to pass. For the LP470 filter, wavelengths above 470 nm pass with high transmission, while light below 456 nm is strongly blocked. This broad transmission band—covering visible light and extending into the near-infrared—makes the LP470 suitable for imaging setups that use white-light illumination, multi-spectral lighting, or scenes with significant short-wavelength interference. Specification Filter type Longpass Useful wavelength range 456-1000 nm Longpass Lens Filter 470 nm Overview and Applications The LP470 filter transmits light above its 470 nm cutoff wavelength, helping stabilize image brightness and reduce contamination from UV and blue light By removing ultraviolet and shorter visible wavelengths, it enhances image contrast and signal stability when used with light sources such as white LEDs, blue suppression lighting or broad-spectrum lamps. The filter is well suited for machine vision, industrial inspection, laboratory setups, and other imaging systems that require controlled spectral separation. Common uses: · UV and blue light suppression · Imaging under white or visible-light illumination · Print, surface, and material inspection Advantages of LP470: · Passes wavelengths above 470 nm with high efficiency · Strong blocking below the cutoff wavelength · Better contrast and detail in camera images · Stable performance in both uniform and variable lighting · Supports accurate and repeatable imaging tasks Longpass Lens Filter 470 nm Lens & Camera Compatibility Most machine vision lenses include a front filter thread, allowing the LP470 to be mounted directly in front of the optics. For systems using a C-mount lens on a USB3 camera or GigE camera, the filter can also be fitted within the C-mount interface. This option is especially helpful when the lens has no front filter thread. Placing the filter between the lens and camera keeps it securely aligned with the optical path and maintains consistent imaging performance without requiring hardware modifications. The LP470 filter offers versatility for various optical setups and can be integrated easily without modifying the existing camera or lens assembly Our Longpass Lens Filter 470 nm is available in different sizes: To support a wide range of lens models, the LP470 is offered in numerous industry-standard thread sizes: - 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 If you plan to use a C-mount (CMT) filter thread, complete the form below to receive instant access to the installation guide and lens compatibility information. hbspt.forms.create({ portalId: "7372172", formId: "9b7a9007-56f1-47fe-8842-3e0b38317a2e", region: "eu1" }); Order LP470 Longpass Filters Select the Longpass Lens Filter 470 nm in the thread size you need. Contact us if you need help choosing the correct cutoff wavelength or size.
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