A real-time colour and image processing p-i-n/p-i-n device with optical readout
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedad Mexicana de Física A.C.
2006
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| _version_ | 1876451812116004864 |
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| author | M. Vieira |
| author_facet | M. Vieira |
| contents | A real-time colour and image processing p-i-n/p-i-n device with optical readout M. Vieira M. Fernandes P. Louro A. Fantoni G. Lavareda C.N. Carvalho Y. Vygranenko Física, Astronomía y Matemáticas tandem devices Optical sensors optical readout image and color recognition A two–terminal, optically addressed image processing device based on two stacked sensing/switching p–i–n a–SiC:H diodes is presented. The charge packets are injected optically into the p–i–n sensing photodiode and confined at the illuminated regions, locally changing the electrical field profile across the p–i–n switching diode. A red scanner is used for charge readout. The various design parameters and addressing architecture tradeoffs are discussed. The influence on the transfer functions of an a–SiC:H sensing absorber, optimized for red transmittance and blue collection or of a floating anode in–between, is analysed. Results show that the thin a–SiC:H sensing absorber confines the readout to the switching diode and light filters the structure, allowing full colour detection at two appropriated voltages. When the floating anode is used the spectral response broadens, allowing B & W image recognition with improved light–to–dark sensitivity. A physical model supports the image and colour recognition process. 2006 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57028295024 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.2 Vol.52 |
| format | Artículo científico |
| id | redalyc_57028295024 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Sociedad Mexicana de Física A.C. |
| spellingShingle | A real-time colour and image processing p-i-n/p-i-n device with optical readout M. Vieira Física, Astronomía y Matemáticas tandem devices Optical sensors optical readout image and color recognition A real-time colour and image processing p-i-n/p-i-n device with optical readout M. Vieira M. Fernandes P. Louro A. Fantoni G. Lavareda C.N. Carvalho Y. Vygranenko Física, Astronomía y Matemáticas tandem devices Optical sensors optical readout image and color recognition A two–terminal, optically addressed image processing device based on two stacked sensing/switching p–i–n a–SiC:H diodes is presented. The charge packets are injected optically into the p–i–n sensing photodiode and confined at the illuminated regions, locally changing the electrical field profile across the p–i–n switching diode. A red scanner is used for charge readout. The various design parameters and addressing architecture tradeoffs are discussed. The influence on the transfer functions of an a–SiC:H sensing absorber, optimized for red transmittance and blue collection or of a floating anode in–between, is analysed. Results show that the thin a–SiC:H sensing absorber confines the readout to the switching diode and light filters the structure, allowing full colour detection at two appropriated voltages. When the floating anode is used the spectral response broadens, allowing B & W image recognition with improved light–to–dark sensitivity. A physical model supports the image and colour recognition process. 2006 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57028295024 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.2 Vol.52 |
| title | A real-time colour and image processing p-i-n/p-i-n device with optical readout |
| topic | Física, Astronomía y Matemáticas tandem devices Optical sensors optical readout image and color recognition |
| url | https://www.redalyc.org/articulo.oa?id=57028295024 |