Optical device

Patent metadata

Field	Value
Publication number	US-2018321504-A1
Application number	US-201815968493-A
Country	US
Kind code	A1
Filing date	May 1, 2018
Priority date	May 5, 2017
Publication date	Nov 8, 2018
Grant date	—

Abstract

An optical device includes a main base, a rotation mechanism, a carrying base, and an optical element. The rotation mechanism is connected to the main base. The carrying base is connected to the rotation mechanism. The optical element is disposed on the carrying base, and configured to change the transmission direction of an incident light. By changing the length of a bias wire of the rotation mechanism, the carrying base is rotated relative to the main base about a rotation axis.

First claim

What is claimed is:

1 . An optical device, comprising:
a main base; a rotation mechanism connected to the main base; a carrying base connected to the rotation mechanism; and an optical element disposed on the carrying base, and configured to change a transmission direction of incident light; wherein the carrying base is rotated relative to the main base about a first rotation axis by changing a length of a bias wire of the rotation mechanism.

2 . The optical device as claimed in claim 1 , wherein the bias wire includes a first conductive end and a second conductive end, wherein a power source provides voltage to the bias wire via the first conductive end and the second conductive end, so as to change the length of the bias wire.

3 . The optical device as claimed in claim 1 , wherein the carrying base is pivoted on the main base, and the bias wire has a first conductive end connected to the main base, and a second conductive end connected to the carrying base.

4 . The optical device as claimed in claim 1 , wherein the main base further comprises a first connection portion, and the carrying base further comprises a second connection portion, wherein the bias wire is connected to the first connection portion and the second connection portion.

5 . The optical device as claimed in claim 4 , further comprising a second bias wire connected to the main base and the carrying base; and a connection wire disposed on the carrying base, and connected to the bias wire and the second bias wire.

6 . The optical device as claimed in claim 1 , wherein the rotation mechanism further comprises an elastic element connected to the main base and the carrying base, and the bias wire surrounds the elastic element.

7 . The optical device as claimed in claim 6 , wherein the elastic element comprises:
an elastic body disposed on the carrying base; an elastic arm connected to the elastic body; and a movable portion disposed on the elastic arm; wherein the bias wire is in contact with the movable portion, and when the length of the bias wire is shorter, the bias wire moves the movable portion so as to rotate the elastic body.

8 . The optical device as claimed in claim 7 , wherein the main base further includes a fixed portion, and a far end of the elastic arm is connected to the fixed portion.

9 . The optical device as claimed in claim 7 , wherein the main base comprises a limitation portion, and the bias wire is in slidable contact with the limitation portion.

10 . The optical device as claimed in claim 1 , further comprising an elastic sheet disposed on the main base and the carrying base, and configured to provide an elastic force between the main base and the carrying base.

11 . The optical device as claimed in claim 10 , wherein the elastic sheet further comprises a shaft portion extending along the first rotation axis.

12 . The optical device as claimed in claim 1 , wherein the rotation mechanism further comprises a third bias wire, wherein the carrying base is rotated relative to the main base about a first rotation direction by changing a length of the first bias wire, and the carrying base is rotated relative to the main base in a second rotation direction by changing a length of the third bias wire.

13 . The optical device as claimed in claim 1 , further comprising a second rotation mechanism connected to the main base and the carrying base, wherein the carrying base is rotated relative to the main base about a second rotation axis by changing a length of a fourth bias wire of the second rotation mechanism.

14 . The optical device as claimed in claim 1 , further comprising an outer main base movably disposed on the main base; and a third rotation mechanism connected to the outer main base and the main base.

15 . The optical device as claimed in claim 1 , wherein an extension direction of the bias wire is perpendicular to the first rotation axis.

16 . The optical device as claimed in claim 1 , wherein the bias wire is located on an imaginary plane, and the imaginary plane is not parallel to the first rotation axis.

17 . The optical device as claimed in claim 1 , wherein the bias wire and the carrying base are arranged in an extension direction of the first rotation axis.

18 . The optical device as claimed in claim 1 , wherein the incident light passing through the optical element is transmitted along a light axis, and the first rotation axis is not parallel to the light axis.

19 . The optical device as claimed in claim 1 , further comprising a lens adjacent to the optical element, wherein the lens and the optical element are arranged in a direction that is not parallel to the first rotation axis.

20 . The optical device as claimed in claim 19 , further comprising a drive assembly that is adjacent to the optical element, and configured to move the lens.

Assignees

• Tdk Taiwan Corp

Inventors

• Hu Chao-Chang
• Chen Shu-Shan
• Fan Chen-Hsien
• Ho Liang-Ting

Classifications

• G02B26/0816

  by means of one or more reflecting elements · CPC title

• H02K41/0356

  moving along a straight path · CPC title

• G02B7/09

  adapted for automatic focusing or varying magnification · CPC title

• G02B27/646 Primary

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title

• G03B2205/0084

  using other types of actuators · CPC title