Imaging device and image generation method

An imaging device comprising:

• a stage configured to hold a subject;
• a detector including a first pixel layer, an insulating layer, and a second pixel layer stacked on top of one another;
• an image formation optical member configured to form an image of imaging light transmitted through the subject;
• and
• an image processor configured to reconstruct an image of the subject based on a detection intensity of the imaging light detected by the detector,
• wherein the first pixel layer includes a plurality of first linear pixels having linear light receiving surfaces extending in a first direction, and the plurality of first linear pixels are arranged with equal intervals from one another in a direction orthogonal to the first direction,
• the second pixel layer includes a plurality of second linear pixels having linear light receiving surfaces extending in a second direction, and the plurality of second linear pixels are arranged with equal intervals from one another in a direction orthogonal to the second direction,
• respective widths of the first linear pixel and the second linear pixel in the first direction are different from each other,
• the stage is scannable relatively with the detector in a direction parallel to the first direction,
• the detector is configured to output, for each sampling interval, a first detection intensity detected in the first pixel layer, and a second detection intensity detected in the second pixel layer,
• a distance that the stage is scanned at the sampling interval is shorter than a line length of the first linear pixel, and
• the image processor is further configured to:
• assume that a first detection intensity distribution indicating the first detection intensity with respect to position coordinates of the stage is a convolution of a first image intensity distribution on a line extension line of the first linear pixel and a first window function showing 1 in a range of position coordinates of the stage corresponding to the line length of the first linear pixel and showing 0 in other ranges, and calculate the first image intensity distribution for each of the plurality of first linear pixels with a deconvolution from the first detection intensity distribution,
• correct the first image intensity distribution by using a second detection intensity distribution indicating the second detection intensity with respect to the position coordinates of the stage, and
• generate an image of the subject having a resolution in the first direction that is smaller than the line length of the first linear pixel by arranging the first image intensity distributions corrected in all the first linear pixels in an arrangement direction of the first linear pixels.