Optical Actuator Drive Structure for Dual-Moving Camera Stabilization

The patent replaces the traditional mechanical lens drive assembly with an optical actuator that uses optical force (radiation pressure) to move the lens group. The optical actuator includes a light source, a diffraction grating that converts light into multiple beams, and uses the interference and radiation pressure of these beams to propel the lens group without mechanical contact, thereby eliminating the need for complex mechanical driving structures and reducing overall module size.

The patent changes the physical state and properties of the actuation mechanism by using optical fields instead of mechanical fields. By controlling the intensity, wavelength, and distribution of light beams, the system achieves precise control over lens group movement without the size constraints of mechanical actuators, enabling miniaturization while maintaining focusing functionality.

The patent introduces a diffraction grating as an intermediary component between the light source and the lens group. The diffraction grating converts a single light beam into multiple discrete beams that can be precisely controlled and directed. These multiple beams work together to achieve accurate positioning of the lens group by creating controlled interference patterns and radiation pressure distributions, thereby overcoming the scattering issue and improving positioning precision.

The patent segments the light beam into multiple separate beams through the diffraction grating. Instead of using a single scattered light beam, the system employs multiple distinct beams that can be individually controlled and combined to create precise positioning forces. This segmentation of the light field allows for more accurate control over the lens group position while maintaining the advantages of optical actuation for miniaturization.