Spectral Sensing for Mobile Devices

ams is a leading provider of chip-scale spectral sensing solutions, offering products with a variety of unique filter characteristics. 

These solutions benefit from proprietary ams technology for fabricating interferometric optical filters directly on the wafer, producing spectrometer-like performance in a sensor-sized package. The ams spectral sensors can splice the light spectrum into separate signals which can be read out and analysed.

The ams interferometric filters are designed with spectral characteristics suited to various applications in the visible and Near Infrared (NIR) range. With the development of new sensors offering a higher channel count and resolution, more and more applications can move away from the lab and into mobile and consumer devices.

Find out more about understanding the perfect photographic scene via Spectral Light Source Identification, using the Spectral ALS Sensor AS7350

Spectral ALS with Light Source Detection improves Automatic White Point Balance

Finding the ideal Correlated Color Temperature (CCT) or White Point value for specific scenes can be very difficult. Diverse light sources and conditions can distort the color and quality of an image and mixed light sources increase this effect. Even normal objects in a room or scene distort the perceived CCT value, from the actual value of the light source (red wall, blue sky, green forest). Flickering light sources or background items like displays affect the quality of an image.

Spectral Ambient Light Sensors measure the light source and perform a spectral estimation of the CCT vs. the distortion effects of other influences. The system can now use the measured value alongside with the detected light source to find an ideal white point CCT value. An integrated flicker chip can eliminate environmental flicker effects and synchronize the cameras shutter times. This sensor enables the measurement of the Color Rendering Index (CRI) value of an image. The Spectral ALS Sensor activates post-processing improvement options.  Find out more about our spectral sensors and download our chip-scale white paper.

Key Features

  • Ultra low-profile packages
  • On-wafer filter deposition
  • Special deposition machines for robust inorganic filters
  • High volume production and testing for optical sensors
  • Standard and customizable filter sets available

Key Benefits

  • Bring the spectral lab to the sample
  • Enables very small PCB design
  • Lowers bill-of-materials costs, enables many new applications
  • Highly stable filter characteristics
  • Low power consumption in mobile applications