GLASS PLATE, METHOD FOR INSPECTING END SURFACE OF GLASS PLATE, AND METHOD FOR MANUFACTURING GLASS PLATE

• Main Authors: TSUNODA HIROSHI, ITO SHO, TAWADA YU, OKU HAYATO
• Format: Patent
• Language: English; Japanese
• Published: 29.11.2018
• Subjects: 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; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; JOINING GLASS TO GLASS OR OTHER MATERIALS; MEASURING; METALLURGY; MINERAL OR SLAG WOOL; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TESTING

PROBLEM TO BE SOLVED: To provide a glass plate more surely that generates an only extremely small amount of glass powders from the end surface by increasing the accuracy of inspecting the end surface.SOLUTION: The method for inspecting an end surface of a glass plate includes a first observation step of enlarging and observing a specific region R of a polished surface S1a formed on an end surface S1 of an inspection glass plate S and acquiring a first enlarged image; a cleaning step of cleaning the specific region R while applying external stimulation to the specific region R; a second observation step of enlarging the specific region R again and acquiring a second enlarged image; and an evaluation step of comparing the first enlarged image and the second enlarged image and counting the number of fine recesses in the specific region R formed after the first observation step.SELECTED DRAWING: Figure 4 【課題】ガラス板の端面検査の精度向上を図ることによって、端面から発生するガラス粉の極めて少ないガラス板をより確実に提供する。【解決手段】検査用ガラス板Ｓの端面Ｓ１に形成された研磨面Ｓ１ａの特定領域Ｒを拡大観察して第一拡大画像を取得する第一観察工程と、特定領域Ｒに外的刺激を付与しながら特定領域Ｒを洗浄する洗浄工程と、特定領域Ｒを再び拡大観察して第二拡大画像を取得する第二観察工程と、第一拡大画像および第二拡大画像を比較し、第一観察工程後に新たに特定領域Ｒ内に形成された微小凹部の数を計数する評価工程と、をこの順に備えている。【選択図】図４