Patent ID: 11864866
Assignee: CORTIRIO LIMITED
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 29:
30. An imaging apparatus according to claim 29, wherein the second measurement mode is implemented by the means to control the plurality of light detectors:
applying a null voltage Vbx to the anode of the first photodiode of each pair thereby holding the first photodiode of each pair in an unbiased, non-conducting state, and applying the second bias voltage Vbp to the cathode of the second photodiode of each pair and applying the measurement voltage Vm at the cathode of the first photodiode connected to the anode of the second photodiode, thereby holding the second photodiode of each photodiode pair in a reverse bias state, and
the light intensity measurement unit is arranged to measure an output of the second photodiode of each photodiode pair from the current output measured at the cathode of the first photodiode connected to the anode of the second photodiode, and, before or subsequently the means to control the plurality of light detectors:
applying a first bias voltage Vbn to the anode of the first photodiode of each pair and applying the measurement voltage Vm at the cathode of the first photodiode connected to the anode of the second photodiode thereby holding the first photodiode of each pair in a reverse biased state, and applying a null voltage Vbx to the cathode of the second photodiode of each photodiode pair thereby holding the second photodiode of each photodiode pair in an unbiased, non-conducting state,
the light intensity measurement unit is arranged to measure an output of the second photodiode of each photodiode pair from the current output measured at the cathode of the first photodiode connected to the anode of the second photodiode.