Multiple aperture imaging system

• US 6,943,946 B2
• Filed: 05/01/2003
• Issued: 09/13/2005
• Est. Priority Date: 05/01/2003
• Status: Expired due to Term

• Current Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Original Assignee: ITT Manufacturing Enterprises, Inc. (ITT, Inc.)
• Inventors: Fiete, Robert D.
• Primary Examiner(s): Nguyen, Thong
• Assistant Examiner(s): Lavarias, Arnel C.
• Application Number:
  US10/427,423
• Publication Number:
  US 20040218291A1
• Time in Patent Office: 866 Days
• Field of Search: 359/850, 359/419, 359/423, 359/362, 359/363, 359/434, 359/399, 359/429, 359/629, 359/637
• US Class Current: 359/423
• CPC Class Codes: G02B 17/0652 on-axis systems with at least one of the mirrors having a central aperture

Abstract

A multiple aperture imaging system, that includes: a plurality of imaging elements for capturing light; an optical relay assembly for phasing the captured light; a means for diverting the captured light within the multiple aperture imaging system to produce a plurality of images; and an imaging sensor capable of receiving the captured light from each of the plurality of imaging elements.

Claims

1. A multiple aperture imaging system comprising:

a plurality of imaging elements each capturing light of a scene;

an optical relay assembly for receiving and coherently summing captured light from each of the imaging elements;

a combiner imaging sensor for receiving the coherently summed captured light from the optical relay assembly;

a plurality of individual imaging sensors, each individual imaging sensor configured to receive captured light outputted from a respective one of the imaging elements;

means for diverting the captured light, that is outputted from each of the imaging elements, toward the optical relay assembly and away from the individual imaging sensors; and

a selector for enabling and disabling the means for diverting the captured light outputted from each of the imaging elements;

wherein (i) when the selector disables the means for diverting the captured light, each individual imaging sensor forms an independent image based on light captured by a respective one of the imaging elements, and

(ii) when the selector enables the means for diverting the captured light, the combiner imaging sensor coherently sums the captured light from the optical relay assembly to form an image having a higher resolution than another image formed by any one of the individual imaging sensors.

2. The multiple aperture imaging system claimed in claim 1, wherein the means for diverting the captured light is selected from the group consisting of at least one folding mirror, at least one steering mirror, and a prism.

3. The multiple aperture imaging system claimed in claim 1, wherein the multiple aperture imaging system is used to collect a single high-resolution image by combining wavefronts from each of the plurality of imaging elements.

4. The multiple aperture imaging system claimed in claim 1, wherein a folding mirror diverts the captured light into the optical relay assembly.

5. The multiple aperture imaging system claimed in claim 1, wherein the means for diverting the captured light includes a steering mirror used to point each of the plurality of imaging elements to one or more points in the scene.

6. The multiple aperture imaging system claimed in claim 1, further comprising a processor for registering images formed by the individual imaging sensors.

7. The multiple aperture imaging system of claim 1

wherein the selector is configured to enable the means for diverting the captured light, and

a processor is configured to receive the image outputted from the combiner imaging sensor, the processor including a filter for enhancing the received image to form an enhanced image.

8. The multiple aperture imaging system of claim 1

wherein the selector is configured to disable the means for diverting the captured light, and

a processor is configured to receive the independent images outputted by the plurality of individual imaging sensors, the processor including means for spatially registering and summing the independent images to form a single image having a higher signal to noise ratio (SNR) than any of the independent images.

9. The multiple aperture imaging system of claim 1

wherein the selector is configured to disable the means for diverting the captured light,

the imaging elements are each configured to point to different points in the scene, and

a processor is configured to receive the independent images outputted by the plurality of individual imaging sensors, the processor including means for mosaicking the independent images to form a single mosaicked image.

10. The multiple aperture imaging system of claim 1

wherein the selector is configured to disable the means for diverting the captured light,

the imaging elements are each configured to point to different points in the scene, and

the individual imaging sensors are configured to form the independent images, each image based on a respective imaging element pointing to a point in the scene.

11. A method of combining multiple imaging components comprising the steps of:

a) capturing light of a scene using a plurality of imaging elements;

b) receiving and coherently summing captured light from each of the imaging elements, using an optical relay assembly;

c) combining the coherently summed captured light from the optical relay assembly to form a combined image;

d) directing the captured light from the imaging elements to bypass the optical relay assembly toward a plurality of individual imaging sensors;

e) forming independent images by the individual imaging sensors, when step (d) precedes steps (b) and (c); and

f) forming an enhanced image, when steps (b) and (c) precede step (d).

12. The method claimed in claim 11, wherein the step of forming an enhanced image includes correcting for any residual wavefront errors in the captured light.

13. The method claimed in claim 11, wherein the step of forming an enhanced image includes employing a filter.