Magnetic camera brake

Abstract

Various magnetic camera brake embodiments are disclosed. According to some embodiments, the magnetic camera brakes leverage a magnetic attraction (or repulsion) force between an iron and magnetic body to hold the moving camera components at a desired focus position—even under high amplitude acceleration loads. When high disturbance rejection is desired, the magnet attracts the camera to the desired focus position (e.g., an infinity focus position) with enough force to overcome approximately 10 g's of external acceleration. In some embodiments, ball bearings may be used to provide constraints in up to 5 degrees of freedom (e.g., all but z-axial translation along the optical axis), so there is no rocking of the image sensor (or lens barrel). When 'macro' photos are desired of subjects closer than the hyperfocal distance, an actuator mechanism may be configured to pull the image sensor out of the desired focus position and into the macro focus region.