GLASS LIGHT GUIDE PLATE

PROBLEM TO BE SOLVED: To provide a glass light guide plate capable of suppressing luminance unevenness.SOLUTION: The glass light guide plate includes: a first rectangular face; a second rectangular face facing the first face; and at least one first end face provided between the first face and the se...

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Hauptverfasser:	ISHIKAWA KAZUYA, MIYAMOTO NAOAKI, TAKEMOTO KAZUYA, ITO MASABUMI, TAKANO SHIGEKI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING GLASS HEATING JOINING GLASS TO GLASS OR OTHER MATERIALS LIGHTING MECHANICAL ENGINEERING METALLURGY MINERAL OR SLAG WOOL NON-LINEAR OPTICS NON-PORTABLE LIGHTING DEVICES OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS SYSTEMS THEREOF TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a glass light guide plate capable of suppressing luminance unevenness.SOLUTION: The glass light guide plate includes: a first rectangular face; a second rectangular face facing the first face; and at least one first end face provided between the first face and the second face where the average height Wc of a waviness curve element of the first end face and the average length WSm of the waviness curve element satisfy formula (1), and the minimum value of an internal transmittance of a range of wave length 400-700 nm is 80% or greater under the condition of 200 mm of a light path length. The formula (1) is defined in the specification.SELECTED DRAWING: Figure 1 【課題】輝度ムラを抑制できるガラス導光板を提供すること。【解決手段】矩形状である第１面と、前記第１面に対向し矩形状である第２面と、前記第１面と前記第２面の間に設けられる少なくとも一つの第１端面とを有し、前記第１端面のうねり曲線要素の平均高さＷｃとうねり曲線要素の平均長さＷＳｍとが式（１）を満たし、光路長が２００ｍｍの条件下で、波長４００〜７００ｎｍの範囲における内部透過率の最小値が８０％以上であることを特徴とするガラス導光板（なお、式（１）は明細書に定義されている）。【選択図】図１