Fixed focus camera with lateral sharpness transfer

摘要

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.

主权项

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.