PARC’s Hyperspectral Imaging Technology: Enabling ...€™s Hyperspectral Imaging Technology:...
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PARC’s Hyperspectral Imaging Technology: Enabling ubiquitous hyperspectral imaging PARC has developed a hyperspectral imaging technology with the potential to be integrated into just about any existing imaging system. The technology demands a minimal cost and size overhead as it relies on a liquid crystal layer about as thick as a human hair. OVERVIEW: Hyperspectral imaging (HSI) refers to the simultaneous collection of an optical spectrum at each point in an image. It is applied to fields as diverse as agriculture, medicine, art restoration, and machine vision, however it is currently limited in adoption due to the prohibitive cost of an HSI camera. With the abundance of image processing power available today, the existing outdated HSI hardware is ripe for disruption. The PARC HSI technology endows any existing image sensor with spectral sensitivity without significantly increasing its cost or size. By sandwiching a liquid crystal layer between crossed polarizers and synchronizing the drive of the liquid crystal with the camera’s image acquisition, the system performs interferometry between two polarizations of light that travel through the liquid crystal. The interferometric data are analyzed to provide the spectral information. Because the complexity of the device is shifted from hardware to software, the sophistication of full spectral processing is within reach anywhere images are normally taken. Liquid crystal cell Example hyperspectral image Complete camera prototype
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PARC’s Hyperspectral Imaging Technology:Enabling ubiquitous hyperspectral imaging
PARC has developed a hyperspectral imaging technology with the potential to be integrated into just about any existing imaging system. The technology demands a minimal cost and size overhead as it relies on a liquid crystal layer about as thick as a human hair.
OVERVIEW: Hyperspectral imaging (HSI) refers to the simultaneous collection of an optical spectrum at each point in an image. It is applied to fields as diverse as agriculture, medicine, art restoration, and machine vision, however it is currently limited in adoption due to the prohibitive cost of an HSI camera. With the abundance of image processing power available today, the existing outdated HSI hardware is ripe for disruption.
The PARC HSI technology endows any existing image sensor with spectral sensitivity without
significantly increasing its cost or size. By sandwiching a liquid crystal layer between crossed polarizers and synchronizing the drive of the liquid crystal with the camera’s image acquisition, the system performs interferometry between two polarizations of light that travel through the liquid crystal. The interferometric data are analyzed to provide the spectral information. Because the complexity of the device is shifted from hardware to software, the sophistication of full spectral processing is within reach anywhere images are normally taken.
Liquid crystal cell Example hyperspectral imageComplete camera prototype
Advantages of PARC HSI• Can be adapted to wavelength ranges in
the visible to the IR• Software-tradeable spectral resolution,
spatial resolution, and imaging speed• High optical throughput due to
interferometric (Fourier) data capture• Compatible with a wide range of
image sensors, frame rates, and spatial resolutions
• Fast acqusition times (<1 second) limited by frame rate of sensor
• Provides instantaneous spatial information
Current prototype specsPARC has prototyped its HSI technology by integrating a liquid crystal cell inside a commercial monochrome CMOS camera. The prototype offers the following performance:
• 640 x 480 spatial resolution• Up to 80 degree field of view
• Acquires 30 independent spectral bands in 0.4 seconds
• Wavelength range 400 nm to 1100 nm• F/1.8 max aperture
Potential applications of ubiquitous HSIFor precision agriculture or in the supermarket; document authentication and counterfeit detection; medical imaging, home medical diagnostics, endoscopy, and fluorescence microscopy; augmented reality, passive tagging or target detection; forensics; and many more.
Apply our technology to your camerasPARC can help you incorporate our hyperspectral imaging technology into your existing scientific or consumer cameras. Add hyperspectral capability without modifying your camera’s underlying form factor. Contact PARC Business Development to learn [email protected]
A salad photographed at different spectral bands with the PARC HSI prototype. Not all bands shown.
© Palo Alto Research Center Incorporated
DS.HSI.HSI100009292015
PARC, 3333 Coyote Hill Road, Palo Alto, California 94304 USA +1 650 812 4000 | [email protected] | www.parc.com
PARC, a Xerox company, is in The Business of Breakthroughs®. Practicing open innovation, we provide custom R&D services, technology, expertise, best practices, and IP to global Fortune 500 and Global 1000 companies, startups, and government agency partners. We create new business options, accelerate time to market, augment internal capabilities, and reduce risk for our clients.
