US 11,874,522 B2
Optical mechanism and optical system
Chen-Hsin Huang, Taoyuan (TW); Yi-Ho Chen, Taoyuan (TW); Shou-Jen Liu, Taoyuan (TW); and Chen-Yu Yu, Taoyuan (TW)
Assigned to TDK TAIWAN CORP., Taoyuan (TW)
Filed by TDK TAIWAN CORP., Taoyuan (TW)
Filed on Oct. 22, 2021, as Appl. No. 17/508,170.
Claims priority of provisional application 63/104,118, filed on Oct. 22, 2020.
Prior Publication US 2022/0132002 A1, Apr. 28, 2022
Int. Cl. G02B 7/09 (2021.01); G02B 5/00 (2006.01); G02B 7/02 (2021.01); G02B 7/08 (2021.01); G03B 5/00 (2021.01); H04N 23/51 (2023.01); H04N 23/55 (2023.01)
CPC G02B 7/09 (2013.01) [G02B 5/005 (2013.01); G02B 7/025 (2013.01); G02B 7/08 (2013.01); G03B 5/00 (2013.01); H04N 23/51 (2023.01); H04N 23/55 (2023.01); G03B 2205/0069 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical mechanism, comprising:
an immovable part;
a movable part connected to an optical element, wherein the movable part is movable relative to the immovable part;
a drive assembly driving the movable part to move relative to the immovable part; and
a guidance assembly guiding the movable part to move along a first axis;
wherein the immovable part comprises a frame, and the frame comprises a receiving space receiving the movable part;
wherein the drive assembly comprises:
a first drive element comprising a first shape memory alloy material and a first elongated structure; and
a second drive element comprising a second shape memory alloy material and a second elongated structure, wherein the movable part is driven by the drive assembly by changing a first length of the first drive element and a second length of the second drive element;
wherein the guidance assembly comprises:
a magnetically-permeable element having a magnetically-permeable material; and
a first magnetic element comprising a first pair of magnetic poles, wherein the first pair of magnetic poles comprises a north magnetic pole and a south magnetic pole that are arranged along a second axis, the first magnetic element comprises a first magnetic element surface that faces the magnetically-permeable element, and the first magnetic element surface is perpendicular to the second axis.