Monocentric lens-based multi-scale optical systems and methods of use

Patent metadata

Field	Value
Publication number	US-9762813-B2
Application number	US-201514978800-A
Country	US
Kind code	B2
Filing date	Dec 22, 2015
Priority date	Jan 5, 2009
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A monocentric lens-based multi-scale imaging system is disclosed. Embodiments of the present invention comprise a monocentric lens as an objective lens that collects light from a scene. Monocentric lenses in accordance with the present invention include a spherical central lens element and a plurality of lens shell sections that collectively reduce at least one of spherical and chromatic aberration from the magnitude introduced by the spherical lens element itself. A plurality of secondary lenses image the scene through the objective lens and further reduce the magnitude of aberrations introduced by the objective lens. A plurality of sensor arrays converts optical sub-images of the scene into a plurality of digital images, which can then be used to form a composite image of the scene.

First claim

What is claimed is:

1. An optical system for providing an image of a scene, the optical system comprising:
a first lens that is monocentric about a first position, the first lens operative for forming an intermediate image of the scene at an image field;
a plurality of second lenses, each second lens of the plurality thereof having a unique optical axis that intersects the first position, wherein at least one of the plurality of second lenses is operative for reducing the magnitude of a first aberration; and
a plurality of sensor arrays, each sensor array of the plurality thereof comprising a plurality of sensor elements;
wherein the first lens, the plurality of sensor arrays, and the plurality of second lenses are arranged such that each second lens of the plurality thereof relays a portion of the intermediate image as an optical sub-image at a different one of the plurality of sensor arrays.

2. The optical system of claim 1 wherein the first lens is provided such that the first aberration is selected from the group consisting of spherical aberration and chromatic aberration.

3. The optical system of claim 1 wherein the first lens comprises:
a first lens element that is spherical about the first position, the first lens element including a first hemisphere having a first surface whose center of curvature is located at the first position and a second hemisphere having a second surface whose center of curvature is located at the first position;
an entry lens shell; and
an exit lens shell.

4. The optical system of claim 3 wherein the first lens element introduces a second aberration with a third magnitude on light that transits the first lens element, and wherein the first lens collectively introduces the second aberration with a fourth magnitude on light that transits the first lens, and further wherein the fourth magnitude is less than the third magnitude.

5. The optical system of claim 4 wherein the first lens is provided such that the first aberration is spherical aberration and the second aberration is chromatic aberration.

6. The optical system of claim 3 wherein the first lens is provided such that the exit lens shell comprises a first shell layer and a second shell layer, and wherein the first shell layer and second shell layer are separated by an air gap.

7. The optical system of claim 3 wherein the first lens is provided such that the first lens element, entry lens shell, and exit lens shell are collectively apochromatic.

8. The optical system of claim 3 wherein the first lens is provided such that the entry lens shell and exit lens shell are characterized by different refractive indices.

9. The optical system of claim 1 wherein each of the plurality of sensor arrays is operative for converting an optical sub-image into a plurality of electrical signals.

10. The optical system of claim 9 further comprising a processor operative for forming a plurality of digital sub-images of the scene, wherein each of the plurality of sub-images is based on the plurality of electrical output signals received from a different one of the plurality of sensor arrays.

11. The optical system of claim 10 wherein the processor is further operative for forming a composite digital representation of the scene based on the plurality of digital sub-images.

12. The optical system of claim 1 wherein each second lens of the plurality thereof has the same prescription.

13. An optical system for providing an image of a scene, the optical system comprising:
a first lens that is operative for receiving light from the scene and forming an intermediate image of the scene at an image field that is substantially spherical about a first position, the first lens comprising a first lens element that is monocentric about the first position, wherein the intermediate image is characterized by a first aberration having a first magnitude;
a plurality of cameras, each camera comprising a second lens and a sensor array that collectively define an optical axis of the camera, each second lens being operative for (1) relaying a portion of the intermediate image to form an optical sub-image at its respective sensor array and (2) at least partially correcting the first aberration such that its respective optical sub-image is characterized by a second magnitude that is lower than the first magnitude;
wherein the plurality of cameras is arranged in an arrangement that is substantially spherical such that each optical axis includes the first position.

14. The optical system of claim 13 wherein the first lens element is substantially a sphere having a center at a first position, and wherein the first lens further comprises:
an entry lens shell having a substantially uniform thickness and a center of curvature at the first position; and
an exit lens shell having a substantially uniform thickness and a center of curvature at the first position;
wherein the first lens element interposes the entry lens shell and exit lens shell, and wherein the first lens element introduces the first aberration on light that transits the first lens element such that the first aberration has a third magnitude that is greater than the first magnitude; and
wherein the entry lens shell and exit lens shell are collectively operative for reducing the magnitude of the first aberration from the third magnitude to the first magnitude.

15. The optical system of claim 14 wherein the first lens element introduces a second aberration on light that transits the first lens element such that the second aberration has a fourth magnitude, and wherein the entry lens shell and the exit lens shell are further collectively operative for reducing the magnitude of the second aberration from the fourth magnitude to a fifth magnitude that is lower than the fourth magnitude.

16. The optical system of claim 15 wherein the first aberration is spherical aberration and the second aberration is chromatic aberration.

17. The optical system of claim 13 wherein the aberration is spherical aberration.

18. The optical system of claim 13 wherein the aberration is chromatic aberration.

19. The optical system of claim 13 wherein the first lens has a first focal length for each of a first wavelength, second wavelength, and third wavelength.

20. The optical system of claim 13 wherein each second lens of the plurality of cameras has the same prescription.

Assignees

• Univ Duke

Inventors

• Marks Daniel
• Brady David Jones

Classifications

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/90

  Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums · CPC title

• H04N25/713

  Transfer or readout registers; Split readout registers or multiple readout registers · CPC title

• H04N23/45

  for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images · CPC title

• G02B27/0025 Primary

  for optical correction, e.g. distorsion, aberration · CPC title