Optical Bandpass Filters

Optical Bandpass Filters are used to reject selective wavelengths of light and transmit only the desired portion of the light spectrum. JNS is the premier provider of Optical Bandpass Filters for machine vision and industrial imaging applications. JNS offers one of the world’s largest inventories of Optical Bandpass Filters ready for immediate shipment. In addition to our vast inventory, JNS also offers precise, custom production of Optical Bandpass Filters.

Some of the industries that utilize Optical Bandpass filters from JNS Glass & Coatings:

Machine Vision
Factory Automation
Robotic Guidance
Medical & Life Science
Agriculture Inspection
Autonomous Vehicles
Motion Analysis
Aerial Imaging
Motion Analysis
Fluorescence Imaging

Optical Bandpass Filters from JNS are categorized as follows:

Bandpass (UV, VIS & NIR)
Multi-Bandpass
Longpass
Shortpass / NIR Cut Filters
Neutral Density Filters
Polarizing
Protective
Light Balancing

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Bandpass Filters

Bandpass filters are one of the simplest ways to improve image quality. They are designed to emulate the output of today’s most common types of LEDs used in industrial imaging. All of JNS’s Bandpass Filters have an Anti-Reflection Coating to ensure maximum performance.

Narrow Bandwidth Filters

Narrow Bandwidth Filters are further categorized into 2 sub categories; Narrow Bandwidth (214 Series) and Narrow Interreference Bandwidth (209 Series).

Narrow Bandwidth (214 series) offer superior out of band blocking with a guaranteed peak transmission ≥ 85%. In most cases the 214 Series of Bandpass Filters offer FWHM of 45-55nm. The double side polished glass sued in the manufacturing of these filters result sin exceptional parallelism and optical flatness.

Narrow Bandwidth filters from JNS are designed to be used with laser diodes and LEDs in applications with overwhelming ambient light. Narrow bandwidth filters from JNS are popular in outdoor applications where sunlight is present (for example, surveillance or license plate recognition).

Narrow Interference Bandwidth (209 Series) filters are designed to be used with laser diodes and are frequently used in applications where only discreet wavelength need to be present. These filters are popular amongst life sciences and laser analysis applications.

Narrow Interreference Bandwidth filters offer:

High transmission, usually ≥ 85%
FWHM 20-335nm
Reflective mirror type surface that helps minimize thermal effects

Multi Bandpass Filters

Dual and Triple Bandpass filters are hard coat single substrate fabrication. Multi Bandpass filters are ideal for imaging applications that utilize daytime sunlight and NIR illumination at night. Multi Bandpass Filters achieve accurate color rendition by blocking interfering wavelengths and can eliminate the need for dual sensor imaging. Dual and Triple Bandpass Filters are most commonly used for security and surveillance, intelligent traffic solutions and Normalized Difference Vegetation Index (NDVI) Imaging.

Longpass Filters

Longpass filters are optical filters that reflect shorter wavelengths and transmit (pass) longer wavelengths. Longpass filters from JNS provide a seamless transition from reflection to transmission.

Longpass filters from JNS:

Available in wavelength ranges from 350nm – 1500nm
Peak transmission ≥ 90%
Anti-reflection coated for maximum transmission in VIS and NIR spectrums
Can be combined with shortpass filters for a fine tuned custom bandpass filter
Exceptional 40/20 scratch/dig surface quality
Double side polished for exceptional parallelism and optical flatness

Long Pass Protective Filters

Protective Filters from JNS as designed not only for lens protection but also for maximum transmission. Protective Filters from JNS are made from high quality polished glass or optical grade acrylic.

Shortpass NIR Cut Filters

Shortpass filters (1916 Series) are often referred to as “IR-Cut Filters”. These filters are specifically designed to pass a broad spectrum of shorter wavelength light while blocking longer (VIS) and near-infrared (NIR) wavelengths. Infrared filters are often confused as the term can be applied to filters that pass infrared or filters that block infrared.

JNS categorizes our Shortpass (1196 Series) into “Vis Pass” and “VIS Pass / NIR Block”

1916 Series – VIS Pass:

Separate colors in monochrome or color applications
Improve contrast and resolution

1916 Series – VIS Pass / NIR Block

Often used to achieve a natural color rendition by blocking NIR light from the camera’s sensor
Used as a hot mirror to reduce unwanted heat build-up caused by IR radiation

Both the VIS Pass and the VIS Pass / NIR Block offer:

Peak transmission generally ≥ 90%
Anti-reflection coated for maximum transmission
Designed for a sharp transition between short and longer wavelengths
40/20 scratch/dig (exceptional surface quality)

Neutral Density

Neutral Density (ND) Filters are used to reduce the intensity of light be reflecting or absorbing it. ND Filters are often referred to as the “sunglasses for your system.” JNS offers both reflective and absorptive ND filters.

144 Series – Visible Spectrum (VIS)

Absorptive filter effective form 425-675nm
Optical densities ranging from 0.10 to 6.0

149 Series – Broad Spectrum VIS/NIR

Low reflectivity filter effective from 400-2000nm
Optical densities ranging from 0.3 – 2.0
Coated on low expansion Borofloat® Glass

Polarizing Filters

Polarizing filters reduce reflection and enhance contrast. Polarizing Filters from JNS are designed to reduce specular glare by passing only the light polarized in the direction perpendicular to the reflected light (glare.)

Protective Filters

Protective filters are designed to protect you lens in any environment. Great for everyday use and these filters can also shield your lens in the harshest of environments. These filters are designed to shield against dirt, dust, liquids and impact without sacrificing image quality.

Light Balancing Filters

Light balancing filters correct artificial lighting so colors appear more natural. The use of light balancing filters from JNS often reduced or eliminates the need for software process resulting in greater image stability and control.