Synchronization of projected illumination with rolling shutter of image sensor
First Claim
1. Imaging apparatus, comprising:
- an illumination assembly, comprising a plurality of radiation sources and projection optics, which are configured to project radiation from the radiation sources onto different, respective regions of a scene;
an imaging assembly, comprising an image sensor and objective optics configured to form an optical image of the scene on the image sensor, which comprises an array of sensor elements arranged in multiple groups, which are triggered by a rolling shutter to capture the radiation from the scene in successive, respective exposure periods from different, respective areas of the scene so as to form an electronic image of the scene; and
a controller, which is coupled to actuate the radiation sources sequentially in a pulsed mode so that the illumination assembly illuminates the different, respective areas of the scene in synchronization with the rolling shutter.
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Abstract
Imaging apparatus includes an illumination assembly, including a plurality of radiation sources and projection optics, which are configured to project radiation from the radiation sources onto different, respective regions of a scene. An imaging assembly includes an image sensor and objective optics configured to form an optical image of the scene on the image sensor, which includes an array of sensor elements arranged in multiple groups, which are triggered by a rolling shutter to capture the radiation from the scene in successive, respective exposure periods from different, respective areas of the scene so as to form an electronic image of the scene. A controller is coupled to actuate the radiation sources sequentially in a pulsed mode so that the illumination assembly illuminates the different, respective areas of the scene in synchronization with the rolling shutter.
236 Citations
27 Claims
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1. Imaging apparatus, comprising:
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an illumination assembly, comprising a plurality of radiation sources and projection optics, which are configured to project radiation from the radiation sources onto different, respective regions of a scene; an imaging assembly, comprising an image sensor and objective optics configured to form an optical image of the scene on the image sensor, which comprises an array of sensor elements arranged in multiple groups, which are triggered by a rolling shutter to capture the radiation from the scene in successive, respective exposure periods from different, respective areas of the scene so as to form an electronic image of the scene; and a controller, which is coupled to actuate the radiation sources sequentially in a pulsed mode so that the illumination assembly illuminates the different, respective areas of the scene in synchronization with the rolling shutter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for imaging, comprising:
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arranging a plurality of radiation sources to project radiation onto different, respective regions of the scene; configuring an image sensor, which comprises an array of sensor elements arranged in multiple groups, to receive an optical image of the scene, in which the groups of the sensor elements receive the radiation from different, respective areas of the scene; triggering the groups of the sensor elements with a rolling shutter to capture the radiation from the scene in successive, respective exposure periods so as to form an electronic image of the scene; and actuating the radiation sources sequentially in a pulsed mode so as to illuminate the different, respective areas of the scene in synchronization with the rolling shutter. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. Imaging apparatus, comprising:
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multiple imaging units, comprising; respective pluralities of radiation sources and projection optics, which are configured to project radiation from the radiation sources onto different, respective regions of a scene; and respective imaging assemblies, comprising respective image sensors and objective optics configured to form respective optical images of different, respective, overlapping parts of the scene on the respective image sensors, each image sensor comprising an array of sensor elements arranged in multiple groups, which are triggered by a rolling shutter to capture the radiation from the scene in successive, respective exposure periods from different, respective areas of the scene so as to form respective electronic images of the scene, wherein the radiation sources are actuated sequentially in a pulsed mode so that the illumination assembly illuminates the different, respective areas of the scene in synchronization with the rolling shutter, while synchronizing the respective pluralities of the radiation sources over the multiple image sensors so as to control an overlap of the respective areas of the scene illuminated by the radiation sources at any given time. - View Dependent Claims (26, 27)
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Specification