Title :
A CMOS Optical Sensor System Performing Image Sampling on a Hexagonal Grid
Author :
Hauschild, R. ; Hosticka, B.J. ; Muller, S. ; Schwarz, M.
Author_Institution :
Fraunhofer Institute of Microelectronic Circuits and Systems, FinkenstraÃ\x9fe 61, D-47057 Duisburg, Germany. Email: hschild@ims.fhg.de
Abstract :
An integrated CMOS image acquisition system suitable for retinal information processing in bionic vision systems or product inspection has been developed and tested. It supports the readout of arbitrarily user-defined subregions. The test chip incorporates 32×32 random addressable active sensor cells arranged on a hexagonal grid and on-chip control and readout electronics. It has been designed and fabricated in a standard 1.5 ¿m n-well CMOS process. The size of a single sensor cell is 38.8 ¿m × 33.6 ¿m and the total chip area is 7 mm2. The sensor cells show a logarithmic response in illumination and are capable of detecting illumination variations with frequencies well above 1 MHz.
Keywords :
CMOS image sensors; CMOS process; Electronic equipment testing; Image sampling; Information processing; Inspection; Lighting; Machine vision; Optical sensors; Retina;
Conference_Titel :
Solid-State Circuits Conference, 1996. ESSCIRC '96. Proceedings of the 22nd European
Conference_Location :
Neuchatel, Switzerland
Print_ISBN :
2-86332-197-8
