Infrared Longpass & Visible Block Filters

The LP695 longpass filter sharply transitions into the infrared region, passing the complete near-IR spectrum out to approximately 3000nm.

It blocks almost all visible wavelengths while allowing a small amount of deep red light to pass.

LP695 filters are commonly used with monochrome cameras to improve image contrast and resolution in infrared imaging applications.

For applications requiring stronger ambient light rejection, a bandpass alternative such as the BP735 may provide improved performance.

The LP780 IR longpass filter is commonly used for machine vision applications operating in the 810-830nm wavelength range.

It is suitable for structured laser diode modules and infrared LED illumination systems requiring suppression of visible wavelengths.

LP830 filters are recommended for applications using 850nm or 880nm infrared LED illumination.

These hard-coated filters provide excellent transmission while resisting staining and environmental degradation.

LP830 filters are often selected when future infrared illumination wavelengths may change.

LP920 filters provide excellent lower wavelength blocking and are optimised for 940nm infrared LED systems.

These filters are suitable for semi-covert illumination systems, photographic darkroom applications and InGaAs imaging systems.

The reflective coating surface should face the light source in visible glow suppression applications.

LP1000 filters gradually transition from approximately 860nm, reaching peak transmission around 1600nm.

These filters are commonly used with infrared vidicon and InGaAs camera systems rather than CCD/CMOS cameras.

LP1000 filters are particularly useful in telecommunications and specialised infrared imaging applications.

BP695 filters are designed for imaging in the 680-715nm range and are particularly effective for weak luminescence applications.

These filters block lower excitation wavelengths while passing desired fluorescence wavelengths.

BP735 filters are designed for viewing subjects in the 700-770nm range and for weak luminescence imaging applications.

These filters suppress lower excitation wavelengths while improving infrared contrast performance.

BP800 is a broad absorptive infrared bandpass filter suitable for infrared LED and laser diode illumination.

It is also widely used where extremely thin infrared filters are required, including sensor-level mounting applications.

BP850 filters provide high transmission and broad bandwidth performance for infrared imaging systems using 850nm LEDs.

Hard-coated surfaces improve transmission while resisting staining in harsh environments.

BP880 filters are designed for use with high-power 880nm infrared LEDs.

These filters provide very high transmission while suppressing visible wavelengths and resisting staining over time.