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US 11,531,195 B2Granted
Reflective bijective method and device for coded aperture image acquisition and reconstruction
AssigneeThe Charles Stark Draper Laboratory, Inc.
InventorsEric Hoke, Jeffrey Korn
Life of this patent
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Abstract
A bijective coded aperture system uses mirror system with a multitude of reflector elements attached to an absorbing, such as black, substrate. Each of the reflector elements is independently placed at a different angle with respect to each other in such a manner that the image of the scene is replicated several times at the focal plane and on the image sensor. Moreover, these replicated images may be overlapping. An image processor can then execute reconstruction methods of the image to faithfully represent the scene.
Claims23
A coded aperture imaging system, comprising:
- a tip/tilt mirror system for reflecting light from a scene, the tip/tilt mirror system comprising reflector elements that are positioned at different angles with respect to each other relative to an x, y plane of the tip/tilt mirror system in which the reflector elements have different combinations of rotation around an x axis, angle θ, and rotation around a y axis, angle φ;
- an objective lens system for collecting the light from the tip/tilt mirror system;
- and
- an image sensor for detecting the light from the objective lens system, wherein the different rotation angles θ, φ of the reflector elements fall within a range in which the light from the scene is reflected by the reflector elements within a numerical aperture of the objective lens system to replicate an image of the scene several times on the image sensor;
- an image processor for recovering the image of the scene based on the positioning of the reflector elements;
- wherein the tip/tilt mirror system provides positional feedback concerning an angular position of each of the reflector elements used by the image processor to resolve encoding performed by the tip/tilt mirror system and thereby facilitates decoding of the image detected by the image sensor.
3 more elements
A coded aperture imaging method, comprising:
- reflecting light from a scene with reflector elements that are positioned at different angles with respect to each other relative to an x, y plane of a tip/tilt mirror system, wherein the tip/tilt mirror system comprises a tip/tilt mirror array which is actively controlled in which the reflector elements have different combinations of rotation around an x axis, angle θ, and rotation around a y axis, angle φ;
- collecting the light from the tip/tilt mirror system with an objective lens system;
- and
- detecting the collected light with an image sensor;
- recovering the image of the scene based on the positioning of the reflector elements with an image processor;
- wherein the different rotation angles θ, φ of the reflector elements fall within a range in which the light from the scene is reflected by the reflector elements within a numerical aperture of the objective lens system to replicate an image of the scene several times on the image sensor and
- wherein the tip/tilt mirror system provides positional feedback concerning an angular position of each of the reflector elements used by the image processor to resolve encoding performed by the tip/tilt mirror system and thereby facilitate decoding of the image detected by the image sensor.
4 more elements
An imaging system, comprising:
- a tip/tilt mirror system for reflecting light from a scene, the tip/tilt mirror system comprising a MEMS mirror array comprising reflector elements that are positioned at different angles with respect to each other in which the reflector elements have different combinations of rotation around an x axis, angle θ, and rotation around a y axis, angle φ;
- an objective lens system for collecting the light from the tip/tilt mirror system;
- and
- an image sensor for detecting the light from the objective lens system, wherein the different rotation θ, φ angles of the reflector elements fall within a range in which the light from the scene is reflected by the reflector elements within a numerical aperture of the objective lens system to replicate an image of the scene several times on the image sensor;
- wherein the tip/tilt mirror system provides positional feedback concerning an angular position of each of the reflector elements used by an image processor to resolve encoding performed by the tip/tilt mirror system and thereby facilitates decoding of the image detected by the image sensor.
2 more elements
Dependencies are inferred from the claim text.