PROBLEM TO BE SOLVED: To suppress one point within a certain range from being successively irradiated with light such as laser light when an actuator is abnormal.SOLUTION: An optical deflector 1 includes: a mirror part M; mirror support parts 6A and 6B that support the mirror part M around a first axis; base parts 5A and 5B that support the mirror support parts 6A and 6B; and driving piezoelectric parts A4 and B4 that elastically deform the mirror support parts 6A and 6B. By driving of the driving piezoelectric parts A4 and B4, the mirror support parts 6A and 6B are elastically deformed to cause the mirror part M to make a rotation motion around the first axis, so that a light flux to be incident upon the mirror part M is caused to deflect within a prescribed range. Forced-driving piezoelectric parts A3 and B3 for causing the base parts 5A and 5b to be elastically deformed are provided in the base parts 5A and 5B. When the driving piezoelectric parts A4 and B4 are abnormal, the forced-driving piezoelectric parts A3 and B3 are driven to elastically deform the base parts 5A and 5B, which in turn causes the light flux to be incident upon the mirror part M to deflect outside the prescribed range.SELECTED DRAWING: Figure 1
【課題】アクチュエータが異常の際に、所定範囲内の一点にレーザ光等の光が照射され続けてしまうことを抑制する。【解決手段】ミラー部Mと、ミラー部Mを第1軸回りに支持するミラー支持部6A,6Bと、ミラー支持部6A,6Bを支持する基部5A,5Bと、ミラー支持部6A,6Bを弾性変形させる駆動用圧電部A4,B4とを有し、駆動用圧電部A4,B4の駆動によってミラー支持部6A,6Bを弾性変形させてミラー部Mを第1軸回りに回転運動させることにより、ミラー部Mに入射する光束を所定範囲内で偏向させる光偏向器1であって、基部5A,5Bを弾性変形させる強制駆動用圧電部A3,B3を基部5A,5Bに設け、駆動用圧電部A4,B4が異常のとき、強制駆動用圧電部A3,B3を駆動させて基部5A,5Bを弾性変形させることにより、ミラー部Mに入射する光束を前記所定範囲外へ偏向させる。【選択図】図1
OPTICAL DEFLECTOR, IMAGE PROJECTION DEVICE, OPTICAL WRITING UNIT, AND OBJECT RECOGNITION DEVICE
光偏向装置と、画像投影装置と、光書込みユニットと、物体認識装置
2017-08-03
Patent
Electronic Resource
Japanese
IPC: | G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G09G Anordnungen oder Schaltungen zur Steuerung oder Regelung von Anzeigevorrichtungen mit statischen Mitteln zur Darstellung veränderlicher Informationen , ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION |
European Patent Office | 2021
|LIGHT DEFLECTOR AND OPTICAL SCANNER AND IMAGE PROJECTION DEVICE AND OBJECT RECOGNITION DEVICE
European Patent Office | 2018
|INSPECTION METHOD OF OPTICAL DEFLECTOR, OPTICAL DEFLECTOR AND IMAGE PROJECTION DEVICE
European Patent Office | 2018
|OPTICAL DEFLECTOR, IMAGE PROJECTION DEVICE, AND MOVABLE BODY
European Patent Office | 2020
|European Patent Office | 2023
|