Imaging system with illumination controller to variably control illumination light

摘要

An imaging system includes: an illumination unit configured to emit illumination light for illuminating a subject; a light receiving unit in which pixels are arranged two-dimensionally, each pixel being configured to receive light and generate an electric signal by performing photoelectric conversion of the light; a readout unit configured to sequentially read out the electric signal from the light receiving unit for every horizontal line; and an illumination controller configured to keep intensity of the illumination light emitted from the illumination unit constant in at least a part of a readout period where the readout unit reads out the horizontal line of the light receiving unit in one frame or one field period, and configured to variably control an illumination time of the illumination light emitted from the illumination unit, outside the readout period.

主权项

1. An imaging system comprising:
an illumination unit configured to emit illumination light for illuminating a subject; a light receiving unit in which pixels are arranged two-dimensionally, each pixel being configured to receive light and generate an electric signal by performing photoelectric conversion of the light; a readout unit configured to sequentially read out the electric signal from the light receiving unit for every horizontal line; an illumination controller configured to keep intensity of the illumination light emitted from the illumination unit constant in at least a part of a readout period where the readout unit reads out the horizontal line of the light receiving unit in one frame or one field period, and configured to variably control an illumination time of the illumination light emitted from the illumination unit, outside the readout period; an image processing unit configured to perform a specified image process on the electric signal read out by the readout unit and generate an image of the subject; and a brightness detection unit configured to detect brightness of the subject included in the image generated by the image processing unit, wherein
the readout period is a period where the readout unit reads out the horizontal line of the light receiving unit as a target of the image processing unit, andthe illumination controller is configured to variably control the intensity and timing of the illumination light based on the brightness of the subject detected by the brightness detection unit.