What Are Bandpass Filters Used For?


Optical bandpass filters, which transmit only a certain band of wavelengths while reflecting all others, are useful in a variety of industries. At JNS Glass and Coatings, we often supply optical bandpass filters for machine vision, near infrared imaging, ultra-violet imaging, fluorescence microscopy, spectroscopy, and LiDAR applications.

Machine Vision Applications

Machine vision systems often rely on contrast to carry out their intended functions. For example, if a machine vision system is meant to sort items by color, it needs to be able to distinguish between the colors in question. If there is little contrast between two colors that are being sorted, an optical bandpass filter can be integrated into the system to highlight one color or the other, and make it possible for the image processing tools to easily differentiate between them.

Laser Applications

Optical bandpass filters are used for many different laser applications, including remote sensing, retinal imaging, range finding, medical imaging, laser radar, and laser-induced breakdown spectroscopy. Bandpass filters are well-suited to these laser-based applications, because they are capable of transmitting laser light while simultaneously attenuating ambient wavelengths that could negatively affect process results.

LiDAR Applications

LiDAR (Light Detection and Ranging) is a remote sensing method used for determining ranges. It involves targeting an object or surface with a laser, and then measuring the amount of time it takes for the reflected light to bounce back to the receiver. LiDAR systems are used in myriad industries, including agricultural, automotive, energy, aerospace, and many more. Optical bandpass filters are used in LiDAR systems to improve SNR (Signal-to-Noise ratio) performance.

If you need optical bandpass filters for any application, contact JNS Glass and Coatings today. We carry a vast inventory of optical bandpass filters, and offer custom production for clients who need something unique. To learn more about our optical bandpass filters and their many applications, call us at 1 (888) 567-4527 or send an email to sales@jnsglass.com.