Abstract

The use of full color-sensitive photodetectors with three electrically tunable spectral responses allows the design of sensors that can be real-time reconfigured for different color acquisition modes. All the (physically identical) pixels can be biased in the same way, each giving the same set of RGB spectral responses: in this situation the conversion from the sensor color space to a reference color space can be implemented as usual, giving typical color errors ΔEa,b in the order of 2–3. Alternatively, pixels can be biased in two different ways (e.g., row by row), forming pairs: by joining the information from adjacent pixels, the sensor has six spectral responses, with a reduced resolution. By exploiting this plurality of spectral responses, color reproduction accuracy can be increased. In this work, an improved design of the Transverse Field Detector, a filterless and tunable three-color pixel, is used as the experimental device to propose a dual-color-mode reconfigurable sensor.

© 2012 Optical Society of America

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