CCD based optical detector for a confocal microscope

Television – Special applications – Microscope

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348203, 348306, 348313, 2502013, 257241, H04N 718, H04N 5335, H04N 308

Patent

active

058445986

ABSTRACT:
An optical detector includes a charge-coupled device (CCD). The CCD comprises an active cell for receiving a narrow beam of incident illumination and generating photoelectrons in response thereto, and a first stage readout register comprising a row of N transfer cells, where N>1. A first stage gate structure transfers charge packets consecutively from the active cell into the first stage readout register, whereby N successive charge packets are read into the N cells respectively of the first stage readout register. N second stage readout registers each comprise M transfer cells, where M>1, and a second stage gate structure transfers N charge packets from the N cells of the first stage readout register into respective first cells of the second stage readout registers and subsequently shifts the N charge packets from the respective first cells of the second stage readout registers to respective Mth cells thereof. A multiplexer has N inputs coupled respectively to the Mth cells of the second stage readout registers. The multiplexer is operative to connect a selected input to its output. The multiplexer provides an output signal that varies in accordance with variation in intensity of incident illumination on the active cell.

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Handbook of Biological Confocal Microscopy Second Edition, Edited by James B. Pawley, Chapter 1, Appendix 2, Plenum Press, New York and London, publication date unknown, pp. 584-597.

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