| 摘要 |
An energy sensor, e.g. as part of a transmission image sensor comprises: a radiation-sensitive detector arranged to receive a pulsed radiation beam and to generate a current in response thereto; a circuit equivalent to an RC network connected across the radiation-sensitive detector; and an analog to digital converter connected across a resistive component of the circuit and arranged to output digital samples measuring the voltage across the resistive component at a sampling rate that is greater than the pulse repetition rate of the pulsed radiation beam.
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