Bi-directional closed loop multi-focus-position lens apparatus and method
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United States of America
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Jan 14, 2025
Grant Date -
Aug 29, 2024
app pub date -
Feb 28, 2023
filing date -
Feb 28, 2023
priority date (Note) -
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Abstract
An example bi-directional closed loop multi-focus-position lens apparatus comprises a barrel lens assembly moveable along a longitudinal axis and comprising top and bottom magnetic elements, top and bottom coil elements, a magnetic field sensor, a temperature sensor, a processor, and a non-transitory memory storing predetermined calibration data. The lens apparatus applies current to the coil elements to move the lens assembly toward a desired focus position, captures a magnetic field and temperature within the lens apparatus, compares the captured magnetic field and the captured temperature to the calibration data to determine a current position of the lens assembly, determines if the current position is the desired focus position, and, if the current position is not the desired focus position, adjusts the coil current to move the lens assembly from the current position toward the desired focus position.
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