Title :
Optical confinement and colour separation in a Double Colour Laser Scanned Photodiode (D/CLSP)
Author :
Vieira, M. ; Fernandes, M. ; Louro, P. ; Fantoni, A. ; Rodrigues, I.
Author_Institution :
Dept. of Electron. Telecommun. & Comput., ISEL, Lisboa, Portugal
Abstract :
Large area n-i-p-n-i-p a-SiC:H heterostructures are used as sensing element in a Double Color Laser Scanned Photodiode image sensor (D/CLSP). This work aims to clarify possible improvements, physical limits and performance of CLSP image sensor when used as non-pixel image reader. Here, the image capture device and the scanning reader are optimized and the effects of the sensor structure on the output characteristics discussed. The role of the design of the sensing element, the doped layer composition and thickness, the read-out parameters (applied voltage and scanner frequency) on the image acquisition and the color detection process are analyzed. A physical model is presented and supported by a numerical simulation of the output characteristics of the sensor.
Keywords :
image colour analysis; image sensors; optical scanners; optical sensors; p-i-n photodiodes; silicon compounds; wide band gap semiconductors; SiC:H; color detection; doped layer composition; double colour laser scanned photodiode image sensor; n-i-p-n-i-p SiC:H heterostructure; nonpixel image reader; numerical simulation; optical confinement; scanner frequency; sensor structure; Frequency; Image analysis; Image color analysis; Image sensors; Laser theory; Numerical simulation; Optical sensors; Photodiodes; Sensor phenomena and characterization; Voltage;
Conference_Titel :
TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, 12th International Conference on, 2003
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7731-1
DOI :
10.1109/SENSOR.2003.1217087
