Title:
SURFACE REFRACTIVE INDEX MEASURING METHOD, AND SURFACE STRESS MEASURING METHOD EMPLOYING SAME
Document Type and Number:
WIPO Patent Application WO/2017/115811
Kind Code:
A1
Abstract:
This surface refractive index measuring method is a method of measuring the surface refractive index of toughened glass, and includes: a light supplying step of causing light from a light source to enter a surface layer including a compressive stress layer of the toughened glass, via a liquid having a refractive index that is similar to the refractive index of the outermost surface of the surface layer, or a refractive index between the refractive index of the outermost surface of the surface layer and the refractive index of a part of the toughened glass that is deeper than the surface layer; a light extracting step of causing light that has propagated through the surface layer to be emitted to the outside of the toughened glass via the liquid and a light input/output member; a light converting step of converting into two types of bright line sequences two types of light components that are included in the light emitted to the outside from the toughened glass and that oscillate parallel to and perpendicular to the boundary surface between the toughened glass and the liquid; an image capturing step of capturing images of the two types of bright line sequences; a position measuring step of measuring the positions of the bright lines in the two types of bright line sequences, from images obtained in the imaging capturing step; and a refractive-index distribution calculating step of calculating the refractive-index distribution of the toughened glass, in the depth direction from the surface thereof, corresponding to the two types of light component, on the basis of the measurement results from the position measuring step.
Inventors:
ORIHARA SHUJI (JP)
ORIHARA YOSHIO (JP)
OGAMI SATOSHI (JP)
ORIHARA YOSHIO (JP)
OGAMI SATOSHI (JP)
Application Number:
PCT/JP2016/088964
Publication Date:
July 06, 2017
Filing Date:
December 27, 2016
Export Citation:
Assignee:
ORIHARA IND CO LTD (JP)
ASAHI GLASS CO LTD (JP)
ASAHI GLASS CO LTD (JP)
International Classes:
G01N21/41; G01L1/00; G01L1/24
Domestic Patent References:
| WO2016185934A1 | 2016-11-24 |
Foreign References:
| US20140368808A1 | 2014-12-18 | |||
| JP2014028730A | 2014-02-13 | |||
| JPS5533675A | 1980-03-08 | |||
| JP2016024002A | 2016-02-08 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
Download PDF:
Previous Patent: SHOVEL
Next Patent: FLUOROELASTOMER COMPOSITION AND METHOD FOR PRODUCING CROSSLINKED PRODUCT
Next Patent: FLUOROELASTOMER COMPOSITION AND METHOD FOR PRODUCING CROSSLINKED PRODUCT