Accurate measurement of blue light wavelengths in research on rapid eye aging and eye fatigue

ams announced the release of the new AS7264N tristimulus sensor, which can measure color at a level almost identical to the human eye's response to visible light.

The new sensor accurately measures blue light wavelengths that researchers place significant importance on in relation to human health conditions, such as the disruption or maintenance of circadian rhythms, rapid eye aging, and eye strain.

The AS7264N is available in a compact 4.5mm x 4.7mm x 2.5mm LGA (land grid array) apertured package, making it suitable for lighting or connected sensor packs. The new product is expected to be utilized in emerging applications in human-centric lighting and smart building control.

This new sensor is designed based on ams's successful AS72xx product platform, which includes a full family of optical and color sensors ranging from near-ultraviolet to near-infrared for spectrum and lighting applications.

The tristimulus color sensors in this product family use ams's proprietary on-wafer silicon interference filter to generate individual spectral channels that match the XYZ standard observer model characteristics defined by the CIE 1931 standard. The AS7264N uses two additional blue light filters to more accurately measure the intensity of blue light at both wavelengths of 440nm and 490nm.

The small and affordable AS7264N board-mount sensor enables novel lighting control functions in lighting, displays, smart building automation, or management systems. By incorporating the AS7264N into their products, manufacturers of lighting and building automation sensing solutions can implement smart color monitoring capabilities that measure end-user exposure to blue light wavelengths and monitor responses in real time.

Like other products in the AS72xx series, the AS7264N provides easy-to-use digital color measurement outputs using an ^I2C interface. Its silicon interference filter exhibits very low drift with respect to time and temperature, eliminating the need for calibration throughout the product's lifespan. The programmable on-chip LED driver allows for direct control of the synchronized electronic shutter function.

Tom Griffiths, Senior Marketing Manager for Lighting and Spectral Sensors at ams, stated, “The AS7264N, capable of true color sensing and precise spectral measurements at photobiologically impactful wavelengths, can be utilized in a wide range of applications, including the acquisition of ambient light characteristics and lighting exposure data for commercial, residential, and industrial lighting applications. This solution will help manufacturers accelerate the launch of applications addressing the correlation between lighting and health.”