07-02-2019 дата публикации
Номер: US20190039936A1
Принадлежит:
A glass sheet thermally strengthened such that at the first major surface is under compressive stress; the sheet having an a characteristic 2D autocorrelation matrix c(x,y) given by c(x,y)=F(F(g)·F̂(g)) where F is a 2D Fourier transform and ̂ represents a complex conjugate operation and g is a high pass filtered data array given by g(x,y)=F(F(f(1−F(h)) where h is a spatial 2D low pass filter array and f is a square data array of Shear 0 and Shear 45 data, taken over an area away from any birefringence edge effects on the sheet, wherein an autocorrelation peak maximum width of the matrix c(x,y) at 40% of peak height, for the c(x,y) matrices from both the Shear 0 and Shear 45 data, is between 1 and 5 mm. 1. A strengthened glass sheet , the sheet comprisingfirst major surface;a second major surface opposite the first major surface and separated from the first major surface by a thickness t when expressed in mm;a length of l when expressed in mm of at least 10;a width of w when expressed in mm of at least 10;an interior region located between the first and second major surfaces; andan outer edge surface extending between and surrounding the first and second major surfaces such that the outer edge surface defines a perimeter of the sheet;wherein the sheet is thermally strengthened such that at the first major surface is under compressive stress; {'br': None, 'i': c', 'x,y', 'F', 'F', 'g', '{circumflex over (F)}', 'g, 'sup': '−1', '()=(()·())'}, 'the sheet having an a characteristic 2D autocorrelation matrix c(x,y) given by'} {'br': None, 'i': g', 'x,y', 'F', 'F', 'f', 'F', 'h, 'sup': '−1', '()=(()(1−()))'}, 'where F is a 2D Fourier transform and ̂ represents the complex conjugate operation and g is a high pass filtered data array given by'}where h is a spatial 2D low pass filter array and f is a square data array of Shear 0 and Shear 45 data, taken over an area away from any birefringence edge effects on the sheet, wherein an autocorrelation peak maximum width of the ...
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