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Proceedings Paper

Demodulation pixels in CCD and CMOS technologies for time-of-flight ranging
Author(s): Robert Lange; Peter Seitz; Alice Biber; Stefan C. Lauxtermann
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Paper Abstract

A new generation of smart pixels, so-called demodulation or lock-in pixels is introduced in this paper. These devices are capable of measuring phase, amplitude and offset of modulated light up to some tens of MHz, making them ideally suited to be used as receivers in 3D time-of-flight (TOF) distance measurement systems. Different architectures of such devices are presented and their specific advantages and disadvantages are discussed. Furthermore, a simple model is introduced giving the shot noise limited range resolution of a range camera working with these demodulation pixels. Finally, a complete TOF range camera based on an array of one of the new lock-in pixels will be described. This TOF- camera uses only standard components and does not need any mechanically scanning parts. With this camera non- cooperative targets can be measured with a few centimeters resolution over a distance of up to 20 meters.

Paper Details

Date Published: 15 May 2000
PDF: 12 pages
Proc. SPIE 3965, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications, (15 May 2000); doi: 10.1117/12.385434
Show Author Affiliations
Robert Lange, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Peter Seitz, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Alice Biber, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Stefan C. Lauxtermann, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)


Published in SPIE Proceedings Vol. 3965:
Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications
Morley M. Blouke; Nitin Sampat; Thomas Yeh; Nitin Sampat; George M. Williams; Thomas Yeh, Editor(s)

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