PROBLEM TO BE SOLVED: To provide a light amount adjustment device, light irradiation device using the light amount adjustment device, and image display device that reduce occurrence of failures due to return light reflected between a polarization filter member to be rotated for adjustment of an amount of light and a light transmission member disposed in front of and behind the polarization filter member with aberrations or optical axis deviation suppressed.SOLUTION: In a light amount adjustment device 100 causing a polarization light filter member 103 to rotate to adjust an amount of light passing through the polarization filter member, a light emerging surface of the polarization filter member and an incident surface of a light transmission member 102 adjacent to the light emerging surface thereof are relatively a tilting plane surface, and a rotary axis of the polarization filter member is approximately parallel to a light emerging surface normal line of the polarization filter member and the light emerging surface of the polarization filter member is disposed so as to tilt relative to an optical axis O1. On a virtual surface orthogonal relative to the light emerging surface of the polarization filter member and including an optical axis, a cross line S2 with the virtual surface and the incident surface of the light transmission member is configured so as to tilt in a direction reverse to a cross line S1 with the virtual surface and the light emerging surface of the polarization filter member relative to the optical axis O1.
【課題】光量調整のため回転する偏光フィルタ部材とその前後に配置される光透過部材との間で反射した戻り光による不具合の発生を、収差や光軸ズレを抑制しつつ低減する光量調整装置、これを用いた光照射装置及び画像表示装置を提供する。【解決手段】偏光フィルタ部材103を回転させることにより偏光フィルタ部材を透過する光量を調整する光量調整装置100において、偏光フィルタ部材の出射面とこれに隣接する光透過部材102の入射面とが相対的に傾いた平面であり、偏光フィルタ部材の回転軸は偏光フィルタ部材の出射面法線と略平行であり、かつ、偏光フィルタ部材の出射面は光軸O1に対して傾斜するように配置されており、偏光フィルタ部材の出射面に対して垂直でかつ光軸を含む仮想面上で、該仮想面と光透過部材の入射面との交差線S2が、光軸O1に対し、該仮想面と偏光フィルタ部材の出射面との交差線S1とは逆向きに傾くように構成されている。【選択図】図4
LIGHT AMOUNT ADJUSTMENT DEVICE AS WELL AS LIGHT IRRADIATION DEVICE USING THE SAME, AND IMAGE DISPLAY DEVICE
光量調整装置並びにこれを用いた光照射装置及び画像表示装置
2015-09-03
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 / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen |
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