Systems and Methods for Manufacturing Camera Modules Using Active Alignment of Lens Stack Arrays and Sensors
First Claim
1. A method for actively aligning a lens stack array with a sensor that 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, the method comprising:
- aligning the lens stack array relative to the sensor in an initial position, where the lens stack array comprises a plurality of lens stacks and the plurality of lens stacks forms separate optical channels for each focal plane in the sensor;
varying the spatial relationship between the lens stack array and the sensor;
capturing images of a known target using a plurality of active focal planes at different spatial relationships between the lens stack array and the sensor, where the known target includes at least one region of interest;
scoring the images captured by the plurality of active focal planes, where the resulting scores provide a direct comparison of the extent to which at least one region of interest is focused in the images;
selecting a spatial relationship between the lens stack array and the sensor based upon a comparison of the scores of images captured by a plurality of the active focal planes; and
forming an array camera subassembly in which the lens stack array and the sensor are fixed in the selected spatial relationship.
11 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods in accordance with embodiments of the invention actively align a lens stack array with an array of focal planes to construct an array camera module. In one embodiment, a method for actively aligning a lens stack array with a sensor that has a focal plane array includes: aligning the lens stack array relative to the sensor in an initial position; varying the spatial relationship between the lens stack array and the sensor; capturing images of a known target that has a region of interest using a plurality of active focal planes at different spatial relationships; scoring the images based on the extent to which the region of interest is focused in the images; selecting a spatial relationship between the lens stack array and the sensor based on a comparison of the scores; and forming an array camera subassembly based on the selected spatial relationship.
-
Citations
17 Claims
-
1. A method for actively aligning a lens stack array with a sensor that 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, the method comprising:
-
aligning the lens stack array relative to the sensor in an initial position, where the lens stack array comprises a plurality of lens stacks and the plurality of lens stacks forms separate optical channels for each focal plane in the sensor; varying the spatial relationship between the lens stack array and the sensor; capturing images of a known target using a plurality of active focal planes at different spatial relationships between the lens stack array and the sensor, where the known target includes at least one region of interest; scoring the images captured by the plurality of active focal planes, where the resulting scores provide a direct comparison of the extent to which at least one region of interest is focused in the images; selecting a spatial relationship between the lens stack array and the sensor based upon a comparison of the scores of images captured by a plurality of the active focal planes; and forming an array camera subassembly in which the lens stack array and the sensor are fixed in the selected spatial relationship. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification