Abstract:
A method of controlling the rheology of a sealing glass paste which comprises incorporating a fine inorganic powder in the paste as a mill addition to impart a steep rheology curve to the paste so that the paste resists flow while at rest, but flows readily when shear stress is applied, the amount of inorganic powder incorporated being not over about 10 % by weight. The figure, shows a graphical representation of the invention as applied to a non-lead sealing glass.
Abstract:
Polarizing glass having localized regions or patterns of non-polarizing glass is disclosed. The non-polarizing regions are formed by use of reducing gas-blocking material, local thermal heating of the glass, or by etching techniques. Figures (1a) - (1b) show the reducing gas-blocking method where a shadow mask (4) or a thin layer of material (6) is formed on the surface of the glass (2) to retard the reduction process and enable the production of color gradients and/or designs or patterns in the glass. The masked glass is exposed to a reducing atmosphere such that the reducible phase in the exposed or unprotected regions (8) is reduced and the non-polarizing region (masked region) (10) is not reduced.
Abstract:
A sealing glass material comprising a sealing glass frit and a vehicle, the vehicle being an aqueous solution of a cellulosic polymer, and a method of preparing the sealing glass material.
Abstract:
An interference filter (10, 30, 50, 70, 90, 110, 130, 150, or 190) filters selected wavelengths by dividing an input beam into two or more intermediate beams having different optical path lengths and by recombining the intermediate beams into an output beam that is modified by interference between the intermediate beams. An optical path length difference generator (20, 40, 60, 80, 100, 120, 140, 160, or 200) varies the optical path lengths of the intermediate beams by changing the physical lengths of their paths or the refractive indices of the mediums in which they are conveyed. The optical path length generator (20) of one exemplary embodiment (10) includes a spacer plate (20) that is divided into solid optical elements (22 and 24) having different refractive indices for varying the optical path lengths of the intermediate beams. Another optical path length difference generator (140) is formed by a stack of partially reflective surfaces (144) that are spaced apart in the direction of beam propagation by at least one nominal wavelength for varying the physical path lengths between the intermediate beams.
Abstract:
Apparatus for packaging a fiber optic device (10) along with electronic and opto-electronic components upon a printed circuit board (11). Bend members (32) having arcuate shaped guide surfaces (46) for directing fibers (14) between various components are strategically mounted upon the top surface of the board. Passive fiber optic components are also mounted upon support means between bend members (32) so that the fibers (14) entering and exiting the passive component run tangent to the bend radius of the bend members (32). The radius of curvature of the bend members (32) is within the bend tolerance of the fibers (14) used in the device. The bend members (32) and support members (50) are formed of a material having a thermal coefficient of expansion that is about equal to that of the board material whereby thermally induced stresses on the board mounted components are minimized.
Abstract:
The invention relates to brown glasses which absorb ultraviolet radiation, characterized by the fact that they have the following composition, expressed in wt.% based on the oxides: SiO2 59-78; Al2O3 2-6; B2O3 0-3; Na2O 7-16; K2O 2-9; CaO 0-7; BaO 0-12; ZnO 0-12; ZrO2 0-6; TiO2 0-6; MnO2 0.25-6; V2O5 1-3; Fe2O3 0-1.5; NiO 0-0.5; CoO 0-0.1; Sb2O3 0-0.7; As2O3 0-0.7; F 0.05-1.0; with MnO2 + Fe2O3 + V2O5 > 1.5 and Al2O3 + SiO2 >/= 65. Used for the production of ophthalmic sun glasses.
Abstract:
A single mode optical fiber (36) suitable for use in an amplified fiber optic system (30) which includes an inner glass core doped with rare earth element and an outer transparent glass cladding. The fiber (36) exhibits a plurality of mode coupling sites formed at regular intervals along the length (L) of the fiber (36) which provides for a reduced DOP (Degree of Polarization). The sites are formed by a twist at regular intervals along the fiber length (L) by applying a torque to the fiber (36). The method of forming the fiber is also disclosed.
Abstract:
A material system and method for imparting non-stick and non-wetting properties to an inorganic article having hydroxyl groups on its surface, the system comprising a silane having the formula RnSiX4-n, wherein n is 1-2 and X is a hydrolyzable group, a metal alkoxide having at least three hydrolyzable branches and a formula R MX3 or MX4, wherein M is a metal and X is a hydrolyzable branch, and an acidified aqueous mixture with a lower alkanol.
Abstract translation:一种赋予其表面上具有羟基的无机制品不粘和不润湿性能的材料体系和方法,该体系包含具有式R n SiX 4-n的硅烷,其中n为1-2,X为可水解基团 具有至少三个可水解分支和式R MX3或MX4的金属醇盐,其中M是金属,X是可水解的分支,和具有低级烷醇的酸化含水混合物。
Abstract:
According to the invention, a) at least the first and second compositions of this material in the fluid phase are prepared, b) a sheet (61) of the first composition is poured continuously onto a flat support (4), c) a sheet (62) of the second composition is poured continuously onto sheet (61) of the first composition, and d) the thermal interdiffusion of the materials of the two sheets is ensured so as to obtain the desired gradient of composition in the cooled bar.