An apparatus and method for locking a focus position of a lens assembly without causing the lens cell to tilt, comprising: a spacer interposed between the lens cell and the focus mount. The spacer is received into a sleeve that is integral with the focus mount. The sleeve projects radially outward from the focus mount such that the spacer can be raised and lowered radially with respect to the focus mount. The spacer has a cylindrical body with a radial flange at one end. Moreover, the spacer has...

Methods and apparatus for determining the curvature of a surface by use of multiple discrete triangulation sensors are described. Robustness in the face of an extreme manufacturing environment is achieved by placing a triangulation light source and a detector at a remote, environmentally controlled location. Light is relayed from the remote source to each sensor head by a single mode optical fiber, which then projects a spot onto the surface under consideration. An image of the spot is formed in...

Glass optical elements are molded by moving molds toward one another to press the glass and controlling the movement of the molds to balance the complete formation of the molded surfaces. A first mold is moved to a position short of contact with the glass and parked. A second mold is moved into contact with the glass to drive the glass into contact with the molding surface of the first mold. This changes the shape of the optical surface in contact with the second mold so that continued movement ...

A box spring grid which includes coil spring engaging ears and a plurality of support wires secured to the grid and each including an ear. The ends of each support wire may be reversely bent around one end coil of a coil spring. Also disclosed is a method of manufacturing a box spring support grid wherein ears are formed in all longitudinal wires, between each pair of transverse wires, and, subsequently, selected portions of certain longitudinal wires are removed.

A machine which forms a tray from a flat blank wherein the formed tray has horizontally disposed shoulders extending across the top thereof.

An apparatus which provides a reference light beam projected onto one and preferably all the walls of a room whereby a reference line is provided for positioning articles thereon.

A hot isostatic press which includes a mantle interposed between heating elements and the wall of the press and means associated with the press for equalizing the pressure on both sides of said mantle during operation of the press or during pressurization or depressurization.

A glass delivery system is disclosed which includes a molybdenum delivery pipe surrounded by molten glass and inductively heated by a water cooled induction heating coil surrounding the molybdenum pipe and spaced apart therefrom by means of refractory material.

Disclosed is a projection system wherein light provided from a source passes through a prism and is then incident on an array of reflecting elements which are individually adjustable between a first and second position. Light reflected from each element re-enters the prism. Light from elements in the first position pass through the prism and into a lens. Light from elements in the second position travel through the prism, but do not enter the lens. The principal plane of the lens and the plane i...

There is disclosed a glass melting furnace having various forms of baffles located within the melt for dividing the furnace into zones and creating extended flow paths within the furnace for increasing the minimum residence time of the glass within the furnace and thereby improving glass melting and refining.