Array camera architecture implementing quantum film image sensors

• US 9,888,194 B2
• Filed: 03/11/2014
• Issued: 02/06/2018
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: FotoNation Limited (Adeia Inc.)
• Original Assignee: Fotonation Cayman Limited (Adeia Inc.)
• Inventors: Duparre, Jacques
• Primary Examiner(s): Khan, Usman
• Application Number:
  US14/776,509
• Publication Number:
  US 20160037097A1
• Time in Patent Office: 1,428 Days
• Field of Search: 348294
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: H01L 27/14621 Colour filter arrangements
• CPC Class Codes: H01L 27/14627 Microlenses
• CPC Class Codes: H01L 27/14645 Colour imagers
• CPC Class Codes: H01L 29/127 Quantum box structures
• CPC Class Codes: H04N 25/131 including elements passing infrared wavelengths
• CPC Class Codes: H04N 25/617 for reducing electromagnetic interference, e.g. clocking noise

Abstract

Array cameras incorporating quantum film imagers are disclosed. One embodiment includes: a plurality of focal planes, where each focal plane comprises a plurality of rows of pixels that also form a plurality of columns of pixels and each focal plane is contained within a region of the imager array that does not contain pixels from another focal plane; at least one quantum film located on the surface of the imager array, where each quantum film comprises a plurality of quantum dots; control circuitry configured to control the capture of image information by the pixels within the focal planes, where the control circuitry is configured so that the capture of image information by the pixels in at least two of the focal planes is separately controllable; and sampling circuitry configured to convert pixel outputs into digital pixel data.

Claims

1. An array camera module comprising:

a semiconducting integrated circuit substrate;

a plurality of focal planes, where each focal plane comprises a plurality of rows of pixels that also form a plurality of columns of pixels and each focal plane is contained within a region of the semiconducting integrated circuit substrate that does not contain pixels from another focal plane;

at least one quantum film associated with one of the plurality of focal planes, located on the surface of the semiconducting integrated circuit substrate, where each quantum film comprises a plurality of quantum dots;

wherein the at least one quantum film includes only quantum dots that are sensitive to a specific portion of the electromagnetic spectrum that approximately corresponds to wavelengths characterized as one of;

X-ray radiation, ultraviolet radiation, visible radiation, and near infrared radiation;

control circuitry configured to control the capture of image information by the pixels within the focal planes, where the control circuitry is configured so that the capture of image information by the pixels in at least two of the focal planes is separately controllable; and

sampling circuitry configured to convert pixel outputs into digital pixel data; and

a set of microlenses positioned over the at least one quantum film, wherein each microlens of the set of microlenses focuses light onto a single pixel of a first focal plane of the plurality of focal planes, wherein each microlens of the set of microlenses has a chief ray angle (CRA) greater than a first CRA necessary to focus incoming light onto a light sensitive element within the semiconducting integrated circuit substrate and not greater than a second CRA necessary to focus incoming light onto a surface of the at least one quantum film associated with the first focal plane.

2. The array camera module of claim 1, wherein at least one quantum film includes only quantum dots that are sensitive to the green spectral band of the visible electromagnetic spectrum.

3. The array camera module of claim 2, wherein at least one quantum film includes only quantum dots that are sensitive to the red spectral band of the visible electromagnetic spectrum.

4. The array camera module of claim 3, wherein at least one quantum film includes only quantum dots that are sensitive to the blue spectral band of the visible electromagnetic spectrum.

5. The array camera module of claim 4, wherein the plurality of focal planes are arranged so that they define a 3×

3 matrix of focal planes.

6. The array camera module of claim 5, wherein each of the focal planes within the 3×

3 matrix of focal planes includes a quantum film that includes quantum dots that are sensitive to one of;

the green spectral band of the visible electromagnetic spectrum, the red spectral band of the visible electromagnetic spectrum, and the blue spectral band of the visible electromagnetic spectrum.

7. The array camera module of claim 6, wherein the 3×

3 matrix of focal planes is arranged as follows;

quantum films that include quantum dots that are sensitive to the green spectral band of the visible electromagnetic spectrum are disposed at each of the corner locations of the 3×

3 matrix of focal planes and the center focal plane within the 3×

3 matrix of focal planes;

quantum films that include quantum dots that are sensitive to the red spectral band of the visible electromagnetic spectrum are disposed at each of two opposite sides of the 3×

3 matrix of focal planes; and

quantum films that include quantum dots that are sensitive to the blue spectral band of the visible electromagnetic spectrum are disposed at each of two opposite sides of the 3×

3 matrix of focal planes.