OPTICAL DEVICE AND ILLUMINATING DEVICE

• Main Authors: ARIGA TAKANORI, ITAHANA HIROYUKI, KITAHARA KAZU
• Format: Patent
• Language: English; Japanese
• Published: 29.07.2021
• Subjects: BLASTING; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

To provide an optical device and an illuminating device that can convert light having a Lambertian light distribution into a linear or square-shaped light distribution in which a luminous intensity distribution is more uniform, and emit it.SOLUTION: An optical device comprises: a translucent member 11 comprising a first reflecting surface 31 arranged so as to reflect first light incident along a first axis 12, and having light distribution characteristics comprising an optical axis 7a parallel to the first axis 12, to a first area having an arc shape around the first axis 12; and a reflector 20 comprising a second reflecting surface 22 and a third reflecting surface 23 intersecting with each other at the first axis 12, and arranged so as to sandwich the first reflecting surface 31, and a fourth reflecting surface 24 sandwiched between the second reflecting surface 22 and the third reflecting surface 23, and arranged so as to reflect the first light to the first area having the arc shape around the first axis.SELECTED DRAWING: Figure 5 【課題】ランバーシアン配光の光を、光度分布がより均等に近いライン状または方形状の配光に変換して出射することができる光学装置及び照明装置を提供する。【解決手段】第１の軸１２に沿って入射される、第１の軸１２に平行な光軸７ａを備えた配光特性の第１の光を第１の軸７ａの周りの円弧状の第１の範囲に反射するように配置された第１の反射面３１を有する透光性部材１１と、第１の軸１２で交差し、第１の反射面３１を挟むように配置された第２の反射面２２および第３の反射面２３と、第２の反射面２２および第３の反射面２３に挟まれ、第１の光を第１の軸の周りの円弧状の第１の範囲に反射するように配置された第４の反射面２４と、を有するリフレクタ２０と、を有する光学装置。【選択図】図５