FACET SHAPE AND DISTRIBUTION PATTERN FOR LENSLESS IMAGING

摘要

Aspects of the invention are related to a method and apparatus for capturing an image without a lens. Ambient light reflected off of objects are received through a surface of a light guide substrate and reflected off of reflective features included therein toward a plurality of photodetectors arranged on edges of the substrate. Signals generated by the photodetecotors are processed to generate images of the objects. Reflective features are arranged in such a way that a line-of-sight propagation path exists between each reflective facet and a photodetector with no or little obstruction from the other reflective features for rays of reflected light normal to edges of the light guide substrate.

主权项

1. A method for capturing an image without a lens, comprising:
receiving ambient light through a surface of a lensless imaging light guide substrate configured to reflect the ambient light toward an array of photodetectors with a plurality of reflective features, the reflective features each including at least one planar reflective facet; generating signals at the plurality of photodetectors based on the reflected light; and processing the signals to generate an image, wherein a line-of-sight propagation path exists between each reflective facet and a photodetector disposed on an edge of the light guide substrate without obstruction from the other reflective features for rays of reflected light normal to edges of the light guide substrate.