TRANSPARENT MATERIAL, LUMINAIRE, AND IMAGE READING DEVICE

• Main Authors: SHIRAKI TORU, OHAMA DAISUKE, MATSUZAWA TAKU, OSHIYAMA FUMIKA, KAGANO MIKI
• Format: Patent
• Language: English; Japanese
• Published: 22.08.2016
• Subjects: BLASTING; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; 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 transparent material, a luminaire, and an image reading device capable of stably emitting light with a spread in the arrival direction of the light by restricting variations in the way of resulting shadow at each point of an irradiated area.SOLUTION: A transparent material 21 comprises a transparent material body 22 and a light scattering member 23. The transparent material body 22 has a columnar shape and has a convexoconcave shape formed on a longitudinally region provided on the surface in a band shape, in which a salient 24 protruding in a radially outside direction and a recess 25 formed on the radially inside direction of the salient 24 appear alternately, so that light incident from the edge face passes through the interior. The light scattering member 23 is attached to the transparent material body 22 in a state of not being in close contact with the recess 25 while being in close contact with the salient 24 of the transparent material body 22 so as to evenly scatter and reflect light. The surface of the region provided in a band shape of the transparent material body 22, with which the light scattering member 23 is not in close contact, is structured as a light regular reflection surface on which light reflects regularly.SELECTED DRAWING: Figure 3A 【課題】被照射領域の各点での影の生じ方のばらつきを抑制し、光の到来方向に広がりのある安定した光照射を可能とする導光体、照明装置及び画像読取装置を提供する。【解決手段】導光体２１は、導光体本体２２及び光散乱部材２３を有する。導光体本体２２は、柱状であって、表面に長手方向に帯状に設けられた領域に、径外側方向に突出して形成された凸部２４と凸部２４よりも径内側方向に形成された凹部２５とが長手方向に交互に現れる凹凸形状が形成され、端面から入射した光が内部を透過する。光散乱部材２３は、導光体本体２２の凸部２４に密着されているとともに、凹部２５には密着しない状態で導光体本体２２に取り付けられ、均一に光を散乱反射させる。光散乱部材２３が密着しない導光体本体２２の帯状に設けられた領域の表面は、光が正反射する光正反射面として構成されている。【選択図】図３Ａ