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Tri-stimulus colour sensor

ams has introduced the AS7264N, a tri-stimulus sensor which provides measurements of colour that closely match the human eye’s response to the visible light spectrum.

The sensor is able to accurately measure blue-light wavelengths, which researchers have linked to important health effects such as disruption or management of the circadian rhythm, accelerated eye aging, and eye strain.

Provided in a compact 4.5mm x 4.7mm x 2.5mm land grid array (LGA) apertured package, the AS7264N is intended for use with luminaires and connected sensor packs.

The device is based on the AS72xx product platform which includes a complete family of light and colour sensors from near-UV to near-IR for spectral and lighting applications. The family’s tri-stimulus colour sensors use a unique on-wafer silicon interference filter to create individual spectral channels matching the characteristics of the XYZ standard observer model as specified by the CIE 1931 standard. The AS7264N supplements that with two additional blue light filters, providing the capability to accurately measure the intensity of blue light at both the 440nm and 490nm wavelengths.

The AS7264N will allow for the implementation of novel light control functions in luminaires, displays, and smart building automation or management systems. By incorporating an AS7264N into products, lighting and building automation sensing solution manufacturers will be able to deliver real-time smart colour monitoring to measure and respond to end-users’ exposure to blue light wavelengths.

The AS7264N provides easy-to-use digital colour measurement outputs over an I2C interface. The device’s silicon interference filters, which feature minimal drift over time and temperature, enable lifetime end-device calibration. Programmable on-chip LED drivers enable direct control of synchronized electronic shutter functionality.

Author
Neil Tyler

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http://www.ams.com

Companies

AMS AG

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