LIGHTING DEVICE AND IMAGE SENSOR USING THE SAME

• Main Authors: YAMAGATA KOSAKU, NAKAJIMA HAJIME, TAKUSHIMA SHU, KONO HIROYUKI, MATSUZAWA TAKU
• Format: Patent
• Language: English; Japanese
• Published: 24.08.2015
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; BLASTING; CALCULATING; CINEMATOGRAPHY; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HEATING; HOLOGRAPHY; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

PROBLEM TO BE SOLVED: To obtain a rod-shaped lighting device having uniform illuminance distribution in the main scanning direction and sub-scanning direction.SOLUTION: A lighting device including a rod-shaped light guide 3 further includes a light emission region extending to a part of the side face and emitting the light, entering from a light incident surface 3a, to the outside, a main scanning reflection pattern surface 4 extending to the side face while facing the light emission region and diffusing and reflecting the light in the long axis direction of the light guide 3, and a sub-scanning reflection pattern 13 for diffusing and reflecting the light in a direction perpendicular to the long axis direction, only in the vicinity of the light incident surface 3a of the side face excepting the main scanning reflection pattern surface 4. 【課題】 棒状照明装置において、主走査方向および副走査方向に均一な照度分布を持つ照明装置を得る。【解決手段】 棒状の導光体３を備える照明装置において、側面の一部に延在して入光面３ａから入射する光を外部に出射する出光領域と、出光領域に対向して側面に延在して導光体３の長軸方向に光を拡散反射する主走査反射パターン面４と、主走査反射パターン面４を除く側面の入光面３ａの近傍にのみ長軸方向と垂直な方向に光を拡散反射する副走査反射パターン１３とを備える。【選択図】 図２