Light field photography is an image-based technique for recording scene appearance. Unlike conventional photography, light fields permit manipulation of viewpoint and focus after the imagery has been recorded. Devices for capturing light fields range in scale from room-size arrays of cameras to a handheld camera in which a microlens array has been inserted between the main lens and sensor plane.

Original research publication page:
graphics.stanford.edu/projects/lfmicroscope/
And here:
lightfield.stanford.edu/lfs.html

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