Non-linear wavefront coding systems and methods
AssigneeOmniVision CDM Optics, Inc.
InventorsWade Thomas Cathey JR., Adam Douglas Greengard
Life of this patent
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Abstract
Systems and methods reduce aberrations in a wavefront imaged by an optical system having a non-linear detector. A wavefront of electromagnetic radiation from an object imaged to the non-linear detector is encoded. Data from the non-linear detector is digitally converted to form a digital representation of the image captured by the non-linear detector. The detected image is linearized to form a linearized image. The linearized image is filtered to reverse effects of wavefront coding to form a final image.
Claims23
A non-linear optical system for imaging an object comprising:
- optics for focusing and encoding a wavefront from the object to an intermediate image such that an optical transfer function of the optical system, at the intermediate image, is more invariant to focus-related aberrations as compared to an intermediate image formed by the optics without encoding;
- a non-linear detector for detecting the intermediate image;
- and
- a linearization processor for electronically capturing the intermediate image.
A method for reducing aberrations in a wavefront imaged by an optical system having a non-linear detector, comprising:
- encoding a wavefront of electromagnetic radiation from an object imaged to the non-linear detector;
- digitally converting data from the non-linear detector to form a digital representation of the image captured by the detector;
- linearizing the detected image to form a linearized image;
- and
- filtering the linearized image to reverse effects of wavefront coding to form a final image.
A method for reducing aberrations in a wavefront imaged by an optical system having a non-linear detector, comprising:
- setting an intensity threshold of the non-linear detector, wherein any part of an intermediate image below the intensity threshold is not detected by the non-linear detector;
- encoding a wavefront of electromagnetic radiation from an object imaged to the non-linear detector;
- digitally converting data from the non-linear detector to form a digital representation of the image captured by the detector;
- linearizing the detected image to form a linearized image;
- and
- filtering the linearized image to reverse effects of wavefront coding to form a final image.
Dependencies are inferred from the claim text.