OPTICAL ACTUATOR, AND CORRESPONDING CAMERA MODULE AND CAMERA MODULE ARRAY

• Main Authors: FANG, Yinli, ZHANG, Jianlong, TU, Hongde, CHEN, Zhenyu
• Format: Patent
• Language: English
• Published: 01.10.2020
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; BLASTING; CINEMATOGRAPHY; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; GENERATION; HEATING; HOLOGRAPHY; LIGHTING; MACHINES OR ENGINES FOR LIQUIDS; MECHANICAL ENGINEERING; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOTOTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISEPROVIDED FOR; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; PHOTOGRAPHY; PHYSICS; PRODUCING MECHANICAL POWER; SPRING, WEIGHT, INERTIA OR LIKE MOTORS; WEAPONS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS

An optical actuator (302), comprising: a base (100); a lens module (202) comprising two first side surfaces (204) opposite each other; and a plurality of shape memory alloy wires (203) forming two wire groups, the two wire groups being disposed on the two first side surfaces (204), respectively, wherein two ends of each shape memory alloy wire (203) are fixed to a base-end fixing device (206) and a lens-end fixing device (207), respectively; and the direction of the resultant force acting on the lens module (202) by the two wire groups is consistent with the direction of the optical axis of the lens module (202), so that the lens module (202) is driven to move along the direction of the optical axis of the lens module (202) by means of expansion and contraction of the shape memory alloy wires (203) of the two wire groups.