Longpass Lens Filter 695 nm, Select your size, passes all light above 681 nm

The Longpass Lens Filter 695 nm is a lens filter designed to transmit wavelengths above 695 nm, providing a useful spectral range from approximately 681–1100 nm, while strongly blocking shorter wavelengths.

Mounted directly to a machine vision lens via the standard threaded interface, the filter removes unwanted lower-wavelength content, improving contrast, stabilizing brightness, and revealing features that would otherwise be obscured.

A variety of thread sizes is available, allowing the filter to be matched to lenses of different formats.

Technical Specifications Longpass Lens Filter 695 nm 

A longpass filter blocks light below a defined cutoff wavelength and allows light above that point to pass. 

For the LP695, wavelengths above 695 nm are transmitted efficiently, while wavelengths below ~681 nm are strongly suppressed.

With a passband that spans deep red through the near-infrared, the LP695 is ideal for imaging environments that rely on NIR illumination, require suppression of visible light interference, or operate in scenes where shorter wavelengths create glare or reflections.

Specification
Filter type	Longpass
Useful wavelength range	681-1100 nm

Where to use LP695 Longpass Filter 

The LP695 efficiently transmits light above its 695 nm cutoff, offering a stable passband through 1100 nm. By removing blue, green, and most mid-visible wavelengths, the filter improves contrast and reduces chromatic noise when used with:

• Infrared LED lighting

• Applications requiring selective NIR imaging

The LP695 is a strong choice for machine vision, inspection systems, laboratory setups, and other imaging applications that need controlled spectral filtering.

Typical Applications

• NIR imaging and inspection
• Imaging under IR LEDs (700–950 nm)
• Material and surface inspection
• Detection and measurement where visible light interferes

Key Benefits

• High transmission above 695 nm
• Strong blocking below 681 nm
• Cleaner NIR images with improved contrast
• Stable performance under challenging lighting conditions
• Supports accurate, repeatable measurement and inspection tasks

Longpass Lens Filter 695 nm System Compatibility

Most machine vision lenses include a front filter thread, allowing the LP695 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.

Positioning the filter between the lens and camera ensures proper optical alignment and maintains consistent imaging performance without requiring mechanical changes to the system.

The LP695 is versatile and integrates easily with a wide range of optical configurations.

Available Sizes for Longpass Lens Filter 695 nm

To support a wide range of lens models, the LP695 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.

Questions about LP695 Longpass Filters?

Select the Longpass Lens Filter 695 nm in the thread size you need. If you need help choosing the correct cutoff wavelength or mechanical size, our team can assist.