Optical system

Patent metadata

Field	Value
Publication number	US-11650482-B2
Application number	US-202117400809-A
Country	US
Kind code	B2
Filing date	Aug 12, 2021
Priority date	Aug 14, 2020
Publication date	May 16, 2023
Grant date	May 16, 2023

Abstract

An optical system is provided, including a first optical module, a second optical module, and a light-quantity adjustment module. The first optical module, the second optical module, and the light-quantity adjustment module are arranged in a direction of an optical axis. The first optical module and the second optical module are movable in the direction of the optical axis.

First claim

What is claimed is:

1. An optical system, comprising:
a first optical module;
a second optical module; and
a light-quantity adjustment module; wherein the first optical module, the second optical module, and the light-quantity adjustment module are arranged in a direction of an optical axis;
wherein the optical system further comprises:
a first optical-path adjustment module, changing the traveling direction of a light ray from a first direction to the direction of the optical axis; and
a second optical-path adjustment module, changing the traveling direction of the light ray from the direction of the optical axis to a second direction;
wherein the first optical module, the second optical module, the first optical-path adjustment module, the second optical-path adjustment module, and the light-quantity adjustment module are arranged in the direction of the optical axis;
wherein the optical system further comprises a fixed portion, wherein the fixed portion includes a housing, wherein the first optical module and the second optical module are disposed within the housing;
wherein the optical system further comprises a first optical module driving assembly and a second optical module driving assembly, wherein the first optical module driving assembly comprises:
a first piezoelectric unit, including:
a first piezoelectric element connected to the housing; and
a first transmitting element connected to the first piezoelectric element and the first optical module;
wherein the first transmitting element transmits a first driving force to the first optical module, so that the first optical module is movable relative to the housing;
wherein the second optical module driving assembly comprises:
a second piezoelectric unit, including:
a second piezoelectric element connected to the housing; and a second transmitting element connected to the second piezoelectric element and the second optical module;
wherein the second transmitting element transmits a second driving force to the second optical module, so that the second optical module is movable relative to the housing;
a first optical-path adjustment-module driving assembly and a second optical-path adjustment-module driving assembly, wherein the first optical-path adjustment-module driving assembly comprises:
a third piezoelectric unit, including:
a third piezoelectric element connected to the fixed portion; and
a third transmitting element connected to the third piezoelectric element and the first optical-path adjustment module;
wherein the third transmitting element transmits a third driving force to the first optical-path adjustment module, so that the first optical-path adjustment module is movable relative to the fixed portion;
wherein the second optical-path adjustment-module driving assembly comprises:
a fourth piezoelectric unit, including:
a fourth piezoelectric element connected to the fixed portion; and
a fourth transmitting element connected to the fourth piezoelectric element and the second optical-path adjustment module; wherein the fourth transmitting element transmits a fourth driving force to the second optical-path adjustment module, so that the second optical-path adjustment module is movable relative to the fixed portion.

2. The optical system as claimed in claim 1 ,
wherein the first direction is different from the second direction.

3. The optical system as claimed in claim 2 , wherein the first direction and the second direction are perpendicular to the direction of the optical axis.

4. The optical system as claimed in claim 3 , wherein the first direction is parallel to the second direction.

5. The optical system as claimed in claim 1 , wherein the light-quantity adjustment module is positioned between the first optical module and the second optical module, and wherein the light-quantity adjustment module is movable along the direction of the optical axis relative to the housing.

6. The optical system as claimed in claim 5 , wherein the light-quantity adjustment module is connected to the first optical module, and the light-quantity adjustment module and the first optical module are movable along the direction of the optical axis relative to the housing simultaneously.

7. The optical system as claimed in claim 5 , wherein the light-quantity adjustment module is connected to the second optical module, and the light-quantity adjustment module and the second optical module are movable along the direction of the optical axis relative to the housing simultaneously.

8. The optical system as claimed in claim 1 , wherein the light-quantity adjustment module is positioned between the first optical-path adjustment module and the first optical module.

9. The optical system as claimed in claim 8 , wherein the housing has a first surface inside the housing, and the first surface is parallel to the first direction, wherein the light-quantity adjustment module is fixedly disposed on the first surface.

10. The optical system as claimed in claim 8 , further comprising a third optical module positioned between the light-quantity adjustment module and the first optical module, wherein the third optical module is fixedly connected to the light-quantity adjustment module and the housing.

11. The optical system as claimed in claim 8 , further comprising a third optical module positioned between the first optical-path adjustment module and the light-quantity adjustment module, wherein the light-quantity adjustment module is fixedly connected to the third optical module or the housing.

12. The optical system as claimed in claim 1 , wherein the light-quantity adjustment module comprises:
a frame; and
a light-quantity adjustment element disposed within the frame, and movable relative to the frame.

13. The optical system as claimed in claim 12 , further comprising a control assembly, wherein the light-quantity adjustment module further comprises:
a driving portion connected to the light-quantity adjustment element; and
a conducting portion, wherein one end of the conducting portion is connected to the driving portion, and the other end of the conducting portion extends out of the light-quantity adjustment module and is electrically connected to the control assembly;
wherein the driving portion receives a signal from the conducting portion, driving the light-quantity adjustment element to move relative to the frame.

14. The optical system as claimed in claim 1 , further comprising:
a first sensing magnet connected to the first optical module;
a first sensing element, corresponding to the first sensing magnet, disposed at the housing, and sensing a position of the first optical module relative to the housing;
a second sensing magnet connected to the second optical module;
a second sensing element, corresponding to the second sensing magnet, disposed at the housing, and sensing a position of the second optical module relative to the housing;
a third sensing magnet connected to the light-quantity adjustment module; and
a third sensing element, corresponding to the third sensing magnet, disposed at the housing, and sensing a position of the light-quantity adjustment module relative to the housing.

15. The optical system as claimed in claim 14 , wherein of the first sensing element, the second sensing element, and the third sensing element, no two overlap each other when viewed in the direction of the optical axis.

16. The optical system as claimed in claim 14 , wherein of the first sensing magnet, the second sensing magnet, and the third sensing magnet, no two overlap each other when viewed in the direction of the o

Assignees

• Tdk Taiwan Corp

Inventors

• Wang Chao-Hsi
• Chen Shu-Shan
• Hu Chao-Chang
• Weng Chih-Wei

Classifications

• G02B27/0172 Primary

  characterised by optical features · CPC title

• G02B27/017

  Head mounted · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G03B5/02 Primary

  Lateral adjustment of lens · CPC title

• G03B2205/0061

  using piezoelectric actuators · CPC title