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Proceedings Paper

FPGA-based electronics for confocal line scanners with linear detector arrays
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Paper Abstract

One-dimensional linear detector arrays have been used in the development of microscopes. Our confocal line scanning microscope electronics incorporate two printed circuit boards: control board and detector board. This architecture separates control electronics from detection electronics allowing us to minimize the footprint at microscope detector head. The Field Programmable Gate array (FPGA) on the control board generates timing and synchronization signals to three systems: detector board, frame grabber and galvanometric mirror scanner. The detector is kept away from its control electronics, and the clock and control signals are sent over a differential twisted-pair cable. These differential signals are translated to single ended signals and forwarded to the detector at the microscope detector head. The synchronization signals for the frame grabber are sent over a shielded cable. The control board also generates a saw tooth analog ramp to drive the galvanometric mirror scanner. The analog video output of the detector is fed into an operational amplifier where the white and the black levels are adjusted. Finally the analog video is send to the frame grabber via a shielded cable. FPGA-based electronics offer an inexpensive convenient means to control and synchronize simple line-scanning confocal microscopes.

Paper Details

Date Published: 4 March 2009
PDF: 11 pages
Proc. SPIE 7184, Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XVI, 71840A (4 March 2009); doi: 10.1117/12.809423
Show Author Affiliations
Sanjee Abeytunge, Memorial Sloan-Kettering Cancer Ctr. (United States)
Ricardo Toledo-Crow, Memorial Sloan-Kettering Cancer Ctr. (United States)
Milind Rajadhyaksha, Memorial Sloan-Kettering Cancer Ctr. (United States)

Published in SPIE Proceedings Vol. 7184:
Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XVI
Jose-Angel Conchello; Carol J. Cogswell; Tony Wilson, Editor(s)

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