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1. (WO2018128059) METHOD FOR INSPECTING GLASS PLATE, METHOD FOR MANUFACTURING SAME, AND DEVICE FOR INSPECTING GLASS PLATE

Pub. No.:    WO/2018/128059    International Application No.:    PCT/JP2017/044689
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Thu Dec 14 00:59:59 CET 2017
IPC: G01N 21/896
G01B 11/24
Applicants: NIPPON ELECTRIC GLASS CO., LTD.
日本電気硝子株式会社
Inventors: KYURAGI Masafuku
久良木 正福
YAMAMOTO Koichi
山本 浩一
YAMAMOTO Masayoshi
山本 正善
MINAMI Tomokazu
南 友和
YOSHINO Keiichi
吉野 敬一
FUJII Takahide
藤居 孝英
Title: METHOD FOR INSPECTING GLASS PLATE, METHOD FOR MANUFACTURING SAME, AND DEVICE FOR INSPECTING GLASS PLATE
Abstract:
The present invention has disposed therein: a first imaging system 2 having a first light source 5, a first imaging unit 6 that captures a first transmitted light L1 that is emitted from the first light source 5 and passes through a glass plate G, and a shielding plate 7 that shields a portion of the first transmitted light L1 to form a bright portion and a dark portion in the field of view of the first imaging unit 6; and a second imaging system 3 that has a second light source 8 and a third light source 9, and a second imaging unit 10 that, while capturing, in a bright field, a second transmission light L2 that is emitted from the second light source 8 and passes through the glass plate G, captures, in a dark field, a third transmission light L3 that is emitted from the third light source 9 and passes through the glass plate G. The present invention sorts the types of defects of the glass plate G on the basis of images obtained by the first imaging system 2 and images obtained by the second imaging system 3.