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4-Traders Homepage  >  Equities  >  Tokyo  >  Nippon Sheet Glass Company, Limited    5202   JP3686800008

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Nippon Sheet Glass : Patent Issued for Status Estimation Device, Status Estimation Method and Program for Ultraviolet Curable Resin (USPTO 9250184)

02/11/2016 | 02:52pm US/Eastern

By a News Reporter-Staff News Editor at Journal of Engineering -- A patent by the inventor Fukuzawa, Takashi (Minato-ku, JP), filed on September 23, 2011, was published online on February 2, 2016, according to news reporting originating from Alexandria, Virginia, by VerticalNews correspondents.

Patent number 9250184 is assigned to Nippon Sheet Glass Company, Limited (Tokyo, JP).

The following quote was obtained by the news editors from the background information supplied by the inventors: "The present invention relates to devices, methods, and programs for estimating the status of an ultraviolet curable resin.

"Ultraviolet curable resin has been used as adhesive in assembling optical devices and electronic devices. Because it is difficult to measure the cure degree of ultraviolet curable resin by visual inspection, measurement is normally done by destructive inspection. In cases where an ultraviolet curable resin is used in a factory line, the cure degree is indirectly managed by managing the luminance of curing ultraviolet radiation and time of irradiation and by conducting a destructive test on a sample by sampling inspection.

"Recently, a nondestructive inspection method is known whereby the status, i.e., the cure degree, of an ultraviolet curable resin is estimated based on time-dependent change in the intensity of fluorescence produced when the ultraviolet curable resin is irradiated by ultraviolet radiation (see, for example, patent document No. 1). [patent document No. 1] JP 2007-248244

"However, the intensity of fluorescence from some ultraviolet curable resins changes with an elapse of time after curing. Therefore, the method disclosed in patent document No. 1 may only be capable of accurately estimating the status of an ultraviolet curable resin immediately after the resin is irradiated by ultraviolet radiation.

"Further, since the fluorescence intensity varies depending on the amount of coating made of ultraviolet curable resin, the method disclosed in patent document No. 1 may not be able to estimate the status of the ultraviolet resin with high precision."

In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventor's summary information for this patent: "The present invention addresses the background as described above and a purpose thereof is to provide a technology capable of estimating the status of an ultraviolet curable resin with high precision.

"In order to address the above-mentioned problem the status estimation device for ultraviolet curable resin according to one embodiment of the present invention comprises; an irradiation unit configured to irradiate an ultraviolet curable resin with excitation light; a detection unit configured to receive fluorescence produced from the ultraviolet curable resin and detect wavelength characteristics of the fluorescence; and an estimation unit configured to estimate status of the ultraviolet curable resin based on the wavelength characteristics of the fluorescence.

"According to the embodiment, by estimating the status of the ultraviolet curable resin based on the wavelength characteristics of the fluorescence, the status can be estimated with higher precision than based on the fluorescence intensity. The term 'wavelength characteristics' means fluorescence intensity at two wavelengths or more.

"The detection unit may detect spectral distribution of the fluorescence, and the estimation unit may estimate the status of the ultraviolet curable resin based on a shape of the detected spectral distribution. Spectral distribution may be considered as indication of fluorescence intensity at a large number of wavelengths.

"The estimation unit may estimate the status of the ultraviolet curable resin by comparing the shape of pre-irradiation spectral distribution detected when the ultraviolet curable resin is irradiated by excitation light before being irradiated by ultraviolet radiation with the shape of post-irradiation spectral distribution detected when the ultraviolet curable resin is irradiated by excitation light after being irradiated by ultraviolet radiation.

"The estimation unit may estimate the status of the ultraviolet curable resin by comparing the shape of normalized pre-irradiation spectral distribution with the shape of normalized post-irradiation spectral distribution.

"The estimation unit may estimate that the ultraviolet curable resin has reached a predetermined cure degree if the shape of post-irradiation spectral distribution differs from that of pre-irradiation spectral distribution.

"The estimation unit may estimate that the ultraviolet curable resin has reached a predetermined cure degree if the post-irradiation spectral distribution detected when the ultraviolet curable resin is irradiated by excitation light after being irradiated by ultraviolet radiation exhibits a predetermined shape.

"The detection unit may detect a first intensity at a first wavelength of the fluorescence and a second intensity at a second wavelength of the fluorescence, and the estimation unit may estimate the status of the ultraviolet curable resin based on the intensity ratio of the second intensity with respect to the first intensity.

"The estimation unit may estimate the status of the ultraviolet curable resin by comparing pre-irradiation intensity ratio detected when the ultraviolet curable resin is irradiated by excitation light before being irradiated by ultraviolet radiation with post-irradiation intensity ratio detected when the ultraviolet curable resin is irradiated by excitation light after being irradiated by ultraviolet radiation.

"The estimation unit may estimate that the ultraviolet curable resin has reached a predetermined cure degree if the post-irradiation intensity ratio differs in value from the pre-irradiation intensity ratio.

"The estimation unit may estimate that the ultraviolet curable resin has reached a predetermined cure degree if the post-irradiation intensity ratio detected when the ultraviolet curable resin is irradiated by excitation light after being irradiated by ultraviolet radiation is a predetermined intensity ratio.

"Another embodiment of the present invention relates to a status estimation method for ultraviolet curable resin. The method comprises: irradiating an ultraviolet curable resin with excitation light; receiving fluorescence produced from the ultraviolet curable resin and detecting wavelength characteristics of the fluorescence; and estimating status of the ultraviolet curable resin based on the wavelength characteristics of the fluorescence.

"Still another embodiment of the present invention relates to a program that causes a computer to estimate status of an ultraviolet curable resin. The program comprises a module configured to receive wavelength characteristics of fluorescence produced from an ultraviolet curable resin irradiated with excitation light and a module configured to estimate status of the ultraviolet curable resin based on the wavelength characteristics of the fluorescence."

URL and more information on this patent, see: Fukuzawa, Takashi. Status Estimation Device, Status Estimation Method and Program for Ultraviolet Curable Resin. U.S. Patent Number 9250184, filed September 23, 2011, and published online on February 2, 2016. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9250184.PN.&OS=PN/9250184RS=PN/9250184

Keywords for this news article include: Nippon Sheet Glass Company Limited.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2016, NewsRx LLC

(c) 2016 NewsRx LLC, source Science Newsletters

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