In this thesis, a 3D CMOS imager based on time-of-flight (TOF) has been developed and successfully tested. It uses an active pulsed class 1 laser operating at 910nm to illuminate a 3D scene. The scene depth is determined by measurement of the travel time of reflected pulses by employing a fast on-chip synchronous shutter. A so-called Multiple Double Short Time Integration (MDSI) enables suppression of the background illumination and correction for reflectivity variations in the scene objects. The sensor chip contains two pixel lines with each pixel containing twin photodiodes, thus the chip contains 4ยด64 sensors. The chip allows tow operating modes; the first is the binning mode, where the twin pixels are short-circuited (tow lines on the die) and the average signal is measured. The second mode is the high-resolution mode. In this mode the pixels operate separately (four lines on the die). The chip has been realized in 0.5mm n-well standard CMOS process. The pixel pitch is 130mm. To get a good fill factor, the readout circuitry is located at the sides of the chip.
| Identifer | oai:union.ndltd.org:DUETT/oai:DUETT:duett-05072005-130542 |
| Date | 09 May 2005 |
| Creators | Elkhalili, Omar |
| Contributors | Prof. Bedrich J. Hosticka Ph. D., Prof. Dr.-Ing. Klaus Schumacher |
| Publisher | Gerhard-Mercator-Universitaet Duisburg |
| Source Sets | Dissertations and other Documents of the Gerhard-Mercator-University Duisburg |
| Language | German |
| Detected Language | English |
| Type | text |
| Format | application/octet-stream, application/pdf, text/html |
| Source | http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-05072005-130542/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. Hiermit erteile ich der Universitaet Duisburg das nicht-ausschliessliche Recht unter den unten angegebenen Bedingungen, meine Dissertation, Staatsexamens- oder Diplomarbeit, meinen Forschungs- oder Projektbericht zu veroeffentlichen und zu archivieren. Ich behalte das Urheberrecht und das Recht das Dokument zu veroeffentlichen und in anderen Arbeiten weiterzuverwenden. |
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