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A dual-threshold method is proposed in this paper to reduce the spurious photon events in photon counting imaging with a thermoelectric cooling electron multiplying charge coupled device (EMCCD). Using the thresholds in both spatial and time domains, the read noise, dark signal and clock induced charges (CIC) can be filtered simultaneously. The theory and measurements of the dual-threshold technique...
Basic principles of current electron multiplying CCD (EMCCD) and intensified CCD (ICCD) detectors are reviewed. Based on their noise characteristics, complete signal-to-noise ratio (SNR) theoretical models are constructed for both devices. At high gain levels, we derive that an ICCD is mainly affected by photocathode noise and micro-channel plate (MCP) noise and the effective readout noise of an EMCCD...
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