| CPC G01B 7/003 (2013.01) [G02B 7/102 (2013.01); H04N 23/55 (2023.01); H04N 23/67 (2023.01)] | 20 Claims |
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1. An apparatus comprising:
a lens assembly comprising at least one lens that defines an optical axis;
a substrate;
an image sensor disposed on the substrate;
an actuator coupled to the substrate and configured to adjust a position of the substrate relative to the lens assembly to move the image sensor along the optical axis;
a capacitive position sensor comprising a first capacitive plate coupled to the substrate and a second capacitive plate coupled to the lens assembly, wherein the capacitive position sensor is configured to generate a capacitance measurement indicative of the position of the substrate relative to the lens assembly, wherein the first capacitive plate and the second capacitive plate are oriented parallel to the substrate such that a distance between the first capacitive plate and the second capacitive plate is configured to change based on changes in the position of the substrate relative to the lens assembly along the optical axis, and wherein a first width of the first capacitive plate differs from a second width of the second capacitive plate such that a capacitive area of the capacitive position sensor remains constant while a lateral position of the substrate changes relative to the lens assembly in a direction perpendicular to the optical axis; and
circuitry configured to control the actuator based on the capacitance measurement.
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