LIGHT GUIDE BODY AND LIGHTING SYSTEM

• Main Authors: TAKAMATSU TOMONAO, ONO HIROSHI, KATO MITSUAKI
• Format: Patent
• Language: English; Japanese
• Published: 08.10.2015
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SEMICONDUCTOR DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

PROBLEM TO BE SOLVED: To provide a light guide body capable of actualizing high luminaire efficiency, and to provide a lighting system using the same.SOLUTION: The light guide body in this embodiment includes an introduction part having an incident surface and a reflection surface opposed to the incident surface, a diffusion part having a first surface provided on the side of the reflection surface and a second surface provided on the side of the incident surface and opposed to the first surface, a first point located on a boundary between the reflection surface and the first surface, and a second point located on the incident surface. The center of curvature of the first surface at the first point is a third point. An expression (4) described in a first embodiment is satisfied, where n is the refraction factor of the light guide body, K is the curvature of the first surface at the first point, and D is a distance between the second point and the third point. 【課題】 高い器具効率を実現できる導光体、およびそれを用いた照明装置を提供する。【解決手段】 実施形態の導光体は、入射面と、前記入射面に対向する反射面と、を有する導入部と、前記反射面側に設けられた第１の面と、前記入射面側に設けられ前記第１の面と対向する第２の面と、を有する拡散部と、前記反射面と前記第１の面との境界に位置した第１の点と、前記入射面上の第２の点と、を備え、前記第１の点における前記第１の面の曲率中心を第３の点とし、前記導光体の屈折率をｎとし、前記第１の点における前記第１の面の曲率をＫとし、前記第２の点と前記第３の点との距離をＤとすると、第１実施形態に記載した式（４）を満たす。【選択図】図１