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US 2024/0406582 A1Published application
Persistence filtering in spd arrays
AssigneeVoxelSensors SRL
InventorsWard VAN DER TEMPEL, Johannes Willem PEETERS, André Bernard MIODEZKY, Christian MOURAD
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Abstract
The present invention relates to a system, detector element and method for high-speed imaging with SPD arrays, and a calibration routine for SPD arrays.
Claims16
A method for imaging using an array comprising a plurality of single photon detectors (SPDs), comprising:
- capturing photons on the SPDs;
- generating a detection signal, by the SPDs;
- providing the detection signal to an evaluation circuit, whereby the detection signal indicates:
- a positive observation status when an observation takes place by the SPD of an electromagnetic radiation to be detected, and
- a negative observation status in the absence of the observation by the SPD of the electromagnetic radiation to be detected;
- evaluating the detection signal of the SPD by the evaluation circuit for the respective SPD;
- generating a confirmation signal for the SPD in accordance with a persistence condition being met by the detection signal for the respective SPD;
- and
- for at least one of the SPDs, the persistence condition comprises the positive observation status for the SPD in at least M observation windows over the past N observation windows,
- wherein M is greater than 1 and less than or equal to N.
7 more elements
A detector element for detecting an electromagnetic radiation, comprising:
- a single photon detector SPD configured to generate a signal that describes a status of the occurrence or non-occurrence of an observation by the SPD of the electromagnetic radiation to be detected for consecutive observation windows;
- a memory element (7) that remembers the status of the SPD at an end of at least N previous observation windows, wherein N is a natural number equal to or greater than 1;
- and
- a logical circuit configured to generate a confirmation signal if the signal of the SPD, at the end of a current observation window and from at least M of the N previous observation windows, indicates an observation by the SPD, wherein M is a natural number equal to or greater than 1 and at most equal to N.
1 more element
A sensor system comprising
- a matrix/array of detector elements, whereby the detector elements comprise a single photon detector SPD configured to generate a signal that describes a status of the occurrence or non-occurrence of an observation by the SPD of the electromagnetic radiation (photons) to be detected for consecutive observation windows;
- a logical circuit for reading the signals of the detector elements in the matrix/array, the logical circuit being provided with one or more memory elements;
- whereby the one or more memory elements are configured to remember the status of the SPD at an end of at least N previous observation windows per SPD, wherein N is a natural number equal to or greater than 1;
- whereby the logical circuit is configured to generate a confirmation signal for an SPD if the signal of the SPD at an end of a current observation window and at least M of the N previous observation windows of the SPD indicates an observation by the SPD, wherein M is a natural number between 1 and N.
1 more element
Dependencies are inferred from the claim text.