Available Technology
Wide dynamic range light sensor
Technology:
Photosensor
Markets Addressed
A 64x64-pixel imaging device demonstrating the technique has been built, having a dynamic range of 5 to 6 orders of magnitude with excellent signal-to-noise ratio (SNR). By using the frequency/time domain it is possible to have a fairly constant SNR over the full dynamic range, which is practically impossible for other image sensors; the latter having very low SNR at low illumination levels.
Innovations and Advantages
This novel photosensor employs simple sensing circuitry formed on a single chip. It can provide accurate measurements of an incoming signal (e.g., light) capable of varying of a wide dynamic range. The sensor generates output pulses having a frequency that is proportional to the intensity of the incoming signal. A dynamic range of 105 or more is possible over the entire signal range. A plurality of sensors can be co-located on a single chip for providing a wide dynamic range sensor array. The individual sensors of the array employ simple sensing circuitry that is quite compact and thus suitable for implementation in large arrays.
Additional Information
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Inventor(s):
Yang, Woodward
Categories:
For further information, please contact:
Sam Liss, Director of Business Development
(617) 495-4371
Reference Harvard Case #0764