Abstract:
PROBLEM TO BE SOLVED: To provide a strengthened glass article having a central tension that is below a threshold value above which the glass exhibits vulnerability.SOLUTION: The strengthened glass article has a thickness t and comprises: an outer region, the outer region extending from a surface of the article to a depth of layer DOL within the article, wherein the outer region is under a compressive stress CS; and an inner region, wherein the inner region is under a central tension CT, and wherein -15.7 t +52.5
Abstract:
A method for producing lenses includes assembling a plurality of glass rods having a desired length into a single unit and cutting the single unit into multiple slices, each slice having a plurality of individual lenses. The method further includes finishing the slices to a desired thickness and surface finish and extracting the individual lenses from the slices.
Abstract:
Un artículo de vidrio reforzado, teniendo el artículo de vidrio reforzado un espesor t entre 0,2 mm y 0,5 mm y que comprende: una región exterior, la región exterior extendiéndose desde una superficie del artículo hasta una profundidad de capa DOL dentro del artículo, en donde la región exterior se encuentra bajo una tensión de compresión CS, en donde la DOL es de al menos 30 μm y la CS es al menos de 600 MPa; y una región interior, en la que la región interior está bajo una tensión central CT, en donde CT (MPa) > -15,7 (MPa/mm)·t (mm) + 52,5 (MPa), y en donde el artículo de vidrio reforzado es sustancialmente no frangible cuando se somete a un impacto puntual que es suficiente para romper el artículo de vidrio reforzado, en donde el artículo de vidrio reforzado tiene una índice de frangibilidad de menos de 3, y en donde CT se calcula mediante la ecuación CT >= (CS * DOL)/(t - 2 DOL).
Abstract:
A method for producing lenses includes assembling a plurality of glass rods having a desired length into a single unit and cutting the single unit into multiple slices, each slice having a plurality of individual lenses. The method further includes finishing the slices to a desired thickness and surface finish and extracting the individual lenses from the slices.
Abstract:
A substrate (310) includes an opaque chrome coating (320) on a surface of the substrate (310) dry-etched to form an aperture (340), wherein chrome in the aperture is below detectable limit. A method of forming an opaque chrome coating (320) on a substrate (310) includes depositing an initial thickness of the opaque chrome coating on the substrate without ion-assist or with undetectable ion-assist and depositing the remainder of the opaque chrome coating with or without ion-assist. In one embodiment the invention is directed to an apertured optical element (300) having a substrate transmissive to light (310) and an opaque chrome coating (320) on the substrate defining an aperture (340). Three and four layer opaque coatings of various materials are disclosed, including three layer chrome/chrome oxide/chrome coatings.
Abstract:
Disclosed is a component assembly for an electrical lighting device and method for sealing the same. The assembly comprises the component, such as an electrode lead wire, and a solder glass perform. The component assembly is useful, for example, in hermetically sealing and affixing lamp components, such as electrical lead wires and exhaust tubulation, to a low-pressure fluorescent discharge lamp envelope having phosphor coating already applied thereto. The present invention is particularly suitable for lamp envelope made of borosilicate glass having a CTE from 0 to 300°C in the range of 30-45x10 °C .
Abstract:
A strengthened glass article having a central tension that is below a threshold value above which the glass exhibits frangible behavior. The central tension varies non-linearly with the thickness of the glass. The glass may be used as a cover plate or window for portable or mobile electronic devices such as cellular phones and the like.