Light path adjustment mechanism

Abstract

A light path adjustment mechanism includes a support, a carrier, an optical plate member, a permanent magnet and an electromagnet. The carrier is disposed in the support and connected to the support by a first elastic member and a second elastic member, the first elastic member and the second elastic member are configured to twist substantially about a first axial direction, and the optical plate member is disposed on the carrier. An attractive force or a repulsive force generated between the permanent magnet and the electromagnet acts in a direction substantially perpendicular to the first axial direction, and one end of the carrier is provided with the permanent magnet or the electromagnet.

What is claimed is: 
     
         1 . A light path adjustment mechanism, comprising:
 a support;   a carrier disposed in the support and connected to the support by a first elastic member and a second elastic member, the first elastic member and the second elastic member being configured to twist substantially about a first axial direction;   an optical plate member disposed on the carrier; and   a permanent magnet and an electromagnet, an attractive force or a repulsive force generated between the permanent magnet and the electromagnet acting in a direction substantially perpendicular to the first axial direction, and one end of the carrier being provided with the permanent magnet or the electromagnet.   
     
     
         2 . The light path adjustment mechanism as claimed in  claim 1 , wherein the optical plate member tilts about an axis defined by the first elastic member and the second elastic member, and the axis substantially coincides with the first axial direction. 
     
     
         3 . The light path adjustment mechanism as claim in  claim 2 , wherein a longitudinal direction of the permanent magnet is substantially parallel to the axis. 
     
     
         4 . The light path adjustment mechanism as claim in  claim 1 , wherein the electromagnet comprises a core and a coil winding around the core, and the electromagnet is capable of exchanging magnetic polarities. 
     
     
         5 . The light path adjustment mechanism as claim in  claim 4 , wherein the electromagnet alternately attracts and repels the permanent magnet. 
     
     
         6 . The light path adjustment mechanism as claim in  claim 1 , wherein the optical plate member comprises a lens or a mirror. 
     
     
         7 . The light path adjustment mechanism as claim in  claim 1 , further comprising:
 a pad disposed between the carrier and the electromagnet or between the carrier and the permanent magnet.   
     
     
         8 . The light path adjustment mechanism as claim in  claim 1 , further comprising:
 an elastic member disposed between the one end of the carrier and the support.   
     
     
         9 . The light path adjustment mechanism as claim in  claim 1 , wherein the permanent magnet is disposed on the one end of the carrier, and the electromagnet is disposed on the support. 
     
     
         10 . The light path adjustment mechanism as claim in  claim 1 , wherein each of the permanent magnet and the electromagnet has a north pole and a south pole aligned in a horizontal direction to form two north-south polarity alignments. 
     
     
         11 . The light path adjustment mechanism as claim in  claim 1 , wherein each of the permanent magnet and the electromagnet has a north pole and a south pole aligned in a vertical direction to form only one north-south polarity alignment. 
     
     
         12 . A light path adjustment mechanism, comprising:
 a support;   a carrier configured to tilt between at least a first position and a second position about an axis, the carrier comprising an optical plate member and a mount, and the mount being integrally formed as one piece with the optical plate member;   a first bar and a second bar, the first bar being connected with the support and a first end of the carrier, the second bar being connected with the support and a second end of the carrier, and the first bar and the second bar defining the axis; and   an actuator for actuating the carrier, the axis dividing the carrier into a first part and a second part, and the actuator being disposed in either the first part or the second part.   
     
     
         13 . The light path adjustment mechanism as claim in  claim 12 , wherein the actuator comprises a permanent magnet and an electromagnet, and an attractive force or a repulsive force generated between the permanent magnet and the electromagnet. 
     
     
         14 . The light path adjustment mechanism as claim in  claim 13 , wherein the permanent magnet is disposed on the carrier, and the electromagnet is disposed on the support. 
     
     
         15 . The light path adjustment mechanism as claim in  claim 13 , wherein a longitudinal direction of the permanent magnet is substantially parallel to the axis. 
     
     
         16 . The light path adjustment mechanism as claim in  claim 13 , wherein the electromagnet comprises a core and a coil winding around the core, and the electromagnet alternately attracts and repels the permanent magnet. 
     
     
         17 . The light path adjustment mechanism as claim in  claim 12 , wherein the optical plate member comprises a lens or a mirror. 
     
     
         18 . The light path adjustment mechanism as claim in  claim 12 , further comprising:
 a pad disposed between the carrier and the electromagnet or between the carrier and the permanent magnet.   
     
     
         19 . The light path adjustment mechanism as claim in  claim 12 , further comprising:
 an elastic member disposed near the actuator and abutting against the carrier.   
     
     
         20 . The light path adjustment mechanism as claim in  claim 12 , wherein the actuator is disposed on only one side of the optical plate member.