To provide an optical scanner of which the oscillation performance is improved such that horizontal scanning is hard to affect vertical scanning of a movable plate.SOLUTION: The optical scanner comprises: a movable plate 31 having a reflective film 32 reflecting light; a first shaft part 29 and a second shaft part 30, which support the movable plate 31 swingably around a vertical axis 12; a displacement part 25 connected to the first shaft part 29 and the second shaft part 30; a third shaft part 23 and a fourth shaft part 24, which support the displacement part 25 swingably around a horizontal axis 11 that crosses the vertical axis 12; a permanent magnet 28 provided in the displacement part 25 in such a manner that a line segment connecting one magnetic pole to another magnetic pole is tilted with respect to the vertical axis 12 and the horizontal axis 11; and a coil 15 which is disposed separately from the displacement part 25 and generates a magnetic field acting on the permanent magnet 28. The displacement part 25 comprises a frame part 25b surrounding the movable plate 31 and a first thin plate structure part 25a which is thinner in thickness than the frame part 25b and extends from the frame part 25b in a direction that crosses a direction in which the horizontal axis 11 extends.SELECTED DRAWING: Figure 2
【課題】可動板の垂直走査に水平走査が影響し難いように振動性能を向上させた光スキャナーを提供する。【解決手段】光を反射する反射膜32を備える可動板31と、可動板31を垂直軸12まわりに揺動可能に支持する第1軸部29及び第2軸部30と、第1軸部29及び第2軸部30に接続された変位部25と、変位部25を垂直軸12と交差する水平軸11まわりに揺動可能に支持する第3軸部23及び第4軸部24と、一方の磁極と他方の磁極とを結ぶ線分が垂直軸12及び水平軸11に対して傾斜するように変位部25に設けられた永久磁石28と、変位部25と隔てて設けられ、永久磁石28に作用する磁界を発生するコイル15と、を備え、変位部25は、可動板31を囲む枠部25b、枠部25bより厚みが薄く枠部25bから水平軸11が延在する方向と交差する向きに延在する第1薄板構造部25a、を備える。【選択図】図2
OPTICAL SCANNER AND HEAD-MOUNTED DISPLAY
光スキャナーおよびヘッドマウントディスプレイ
2019-01-31
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 / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen |
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