Title:
METHOD AND APPARATUS OF DETECTING PARTICLES ON UPPER SURFACE OF GLASS, AND METHOD OF IRRADIATING INCIDENT LIGHT
Document Type and Number:
WIPO Patent Application WO/2017/204560
Kind Code:
A1
Abstract:
A particle detecting method including: disposing a rotatable mirror on a path of light emitted from a light source so that the mirror reflects the light to irradiate an incident light to the upper surface; calculating an incident angle of the incident light so that a first region where the incident light meets the upper surface of the glass and a second region where light transmits through the glass and meets a lower surface of the glass do not overlap with each other when viewed from above; rotating the mirror based on the calculated incident angle; acquiring an image of the first region with a camera disposed above the first region while conveying the glass in a horizontal direction; and detecting particles by analyzing the acquired image. The detected particles are considered as existing on the upper surface.
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Inventors:
HWANG SUNGCHAN (KR)
JUNG JIHWA (KR)
KEEM TAEHO (KR)
LEE HYEONGCHEOL (KR)
PYO SUNGJONG (KR)
JUNG JIHWA (KR)
KEEM TAEHO (KR)
LEE HYEONGCHEOL (KR)
PYO SUNGJONG (KR)
Application Number:
PCT/KR2017/005418
Publication Date:
November 30, 2017
Filing Date:
May 24, 2017
Export Citation:
Assignee:
CORNING PREC MATERIALS CO LTD (KR)
International Classes:
G01N21/94; G01N21/17; G01N21/88
Foreign References:
| KR20060097465A | 2006-09-14 | |||
| KR20140023791A | 2014-02-27 | |||
| US20130308124A1 | 2013-11-21 | |||
| US20150316492A1 | 2015-11-05 | |||
| US20130044209A1 | 2013-02-21 |
Attorney, Agent or Firm:
LEE & PARK (KR)
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