Fixed focus camera with lateral sharpness transfer
First Claim
Patent Images
1. A method of fabricating a lens for a camera system, comprising:
- specifying first mean transfer function (“
MTF”
) requirements for the lens within a depth of field (“
DOF”
) range of the lens along a depth axis;
specifying second MTF requirements for the lens outside of the DOF range and within a macro range of the lens along the depth axis, wherein the macro range is distinct and separate from the DOF range, wherein the macro range is a near field relative to the DOF range; and
fabricating a lens having a physical shape or pattern according to the first and second MTF requirements such that the lens has a second in-focus field of view (“
FOV”
) within the macro range that is smaller than a first in-focus FOV within the DOF range by transferring sharpness from a peripheral viewing region within the macro range into a central viewing region within the macro range.
2 Assignments
0 Petitions
Accused Products
Abstract
A lens includes a depth of field (“DOF”) range and a macro range. The macro range is distinct and separate from the DOF range. The macro range is a near field relative to the DOF range. The DOF range provides a first field of view (“FOV”) while the macro range provides a second FOV that is smaller than the first FOV within the DOF range. The lens transfers sharpness from a peripheral viewing region within the macro range into a central viewing region within the macro range.
13 Citations
14 Claims
-
1. A method of fabricating a lens for a camera system, comprising:
-
specifying first mean transfer function (“
MTF”
) requirements for the lens within a depth of field (“
DOF”
) range of the lens along a depth axis;specifying second MTF requirements for the lens outside of the DOF range and within a macro range of the lens along the depth axis, wherein the macro range is distinct and separate from the DOF range, wherein the macro range is a near field relative to the DOF range; and fabricating a lens having a physical shape or pattern according to the first and second MTF requirements such that the lens has a second in-focus field of view (“
FOV”
) within the macro range that is smaller than a first in-focus FOV within the DOF range by transferring sharpness from a peripheral viewing region within the macro range into a central viewing region within the macro range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A non-transitory computer-accessible storage medium that provides instructions that, when executed by a computer, will cause the computer to perform operations for designing a lens for a fixed focus camera system, the operations comprising:
-
receiving first mean transfer function (“
MTF”
) requirements for the lens within a depth of field (“
DOF”
) range of the lens along a depth axis;receiving second MTF requirements for the lens outside of the DOF range and within a macro range of the lens along the depth axis, wherein the macro range is distinct and separate from the DOF range, wherein the macro range is a near field relative to the DOF range; and calculating coefficients of an equation describing a physical shape or a pattern for the lens that satisfies the first and second MTF requirements such that the lens has a second in-focus field of view (“
FOV”
) within the macro range that is smaller than a first in-focus FOV within the DOF range by transferring sharpness from a peripheral viewing region within the macro range into a central viewing region within the macro range. - View Dependent Claims (11, 12, 13, 14)
-
Specification