Abstract: A metal ring for an optical element that is served to cover a peripheral side surface of a lens and served to fix the lens to a mounting member by means of soldering is provided with a thin-wall sleeve a diameter of which is expanded toward a peripheral direction by means of pressure received from an optical material disposed inside the metal ring to thereby obtain a final peripheral side surface size, a thin-wall portion having an inside periphery near an extension of an inside peripheral surface of the thin-wall sleeve on one of apertures of the thin-wall sleeve, and a holding portion comprising a flange that projects from an edge of the aperture toward the aperture. A metal ring for an optical element, a method for fabrication of the optical element having the metal ring, and an optical element having a metal ring of the invention employ the abovementioned metal ring.

Abstract: A lens is fitted into a metal ring that covers the outer peripheral surface of the lens and can be soldered to a fixture member. The side cylindrical part of the metal ring is expanded toward the outer peripheral direction thereof by the pressure of the optical material put inside it, and, thus expanded, it defines the final dimension of the metal ring. One of the two openings formed on both sides of the side cylindrical part of the metal ring is so designed as to have a curving cylindrical part that extends from the side cylindrical part, and this curving cylindrical part is folded toward the optical functional face of the optical device to construct a metal ring-fitted optical device.

Abstract: The invention relates to a method of making a device for stabilizing a Bragg grating relative to temperature, the device being of the type comprising two materials having coefficients of thermal expansion that are far apart, the method comprising the steps consisting in:supplying a glass and a metal suitable for fixing to each other by a chemical reaction between them in an appropriate range of temperatures; andputting the glass and the metal into contact with each other at a temperature lying in said appropriate temperature range so as to fix them together.

Abstract: A method for enclosing an object with a spherical, transparent encapsulation of glass or like hard and scratch-resistant material includes the following steps, to be performed in suitable sequence, of: providing the object having a degradation temperature; arranging this object in a cavity; providing an encapsulating material around this object which melts at a temperature lower than the degradation temperature; carrying the object by a support of transparent material which melts at a temperature lower than the degradation temperature and which is substantially homogeneously fusable with the encapsulating material; and causing this encapsulating material to cure to a transparent encapsulating mass.

Abstract: A method for forming a glass-to-metal seal in which the glass has a higher melting point than the metal. The molten glass is vacuum injection molded onto the metal, thus melting a very thin layer of the surface of the metal long enough to form a seal, but not long enough to cause a distortion in the shape of the metal component.

Abstract: A vapor shield supporting ring is attached to the envelope of a vacuum device. The supporting ring is embedded in the inner wall of the envelope and extends into the interior of such envelope. A welding flange is mounted on the interior portion of the ring. The ring does not extend to the exterior wall of the envelope. To embed the ring in the envelope, the ring is suspended by a holding means such as a magnet, which is placed into the desired position within a centrifugal mold. The molten glass is poured into the mold and the mold is spun, thereby flowing the glass along the walls and surrounding the outer portion of the supporting ring. When the glass solidifies, the supporting ring is firmly embedded in the wall of the envelope.

Abstract: A metal member is coated with or embedded in a high-magnesia glass-ceramic material having the approximate composition of about 60 to 80 weight percent SiO.sub.2, 12 to 20 weight percent Li.sub.2 O, 2 to 14 weight percent MgO, 1.5 to 6 weight percent P.sub.2 O.sub.5, 1 to 7 weight percent of an alkali oxide selected from the group consisting of K.sub.2 O and Na.sub.2 O and their mixtures, 0 to 2 weight percent of a transition metal oxide selected from the group consisting of Co.sub.3 O.sub.4, MnO.sub.2, Fe.sub.2 O.sub.3, V.sub.2 O.sub.5 and WO.sub.3 and their mixtures, 0 to 5 weight percent PbO, 0 to 2 weight percent Al.sub.2 O.sub.3 and 0 to 1 weight percent As.sub.2 O.sub.3.

Abstract: Glass compatible metal matrices are mounted in a glass forming boat and slugs of glass are applied to each. Heat is provided such that openings in the matrix are glassed, whereupon the entire sheet may be ground, polished, or otherwise processed as desired. Alternatively, open ended metallic portions may be utilized to control the amount of sag to which heated glass is subjected, thereby providing glass components of a desired radius of curvature. When metal framed optical components are secured in lasers by weldment, controlled crimping and deflection of the metallic laser jacket portion is utilized for precise alignment of the instrument.