Denoting a finished circular edge. A decentered lens is adjusted on a centering chuck so that its image runs true, and the lens is then edged. A circular edge is one that has been cleared out. However, if the decentering is excessive and the lens is...

Diamond turning refers to a precision machining process used to produce complex optical components, particularly lenses and...

The production of rough glass lens blanks that are pressed while red-hot to the approximate size and shape of the finished...

The process of grinding the concave surface of a single-vision spherical lens.

A natural abrasive, produced from corundum in grades ranging from rough to fine, used in the grinding and lapping of glass.

A grinding process that employs fine emery.

Optical manufacturing tools and machinery encompass a wide range of equipment, instruments, and systems used in the...

A metal tool used to hold a number of lens blanks during grinding and polishing.

The optical process, following grinding, that puts a highly finished, smooth and apparently amorphous surface on a lens or a...

The removal of a sharp edge on an optical element by grinding, to prevent accidental chipping of that edge during subsequent...

The process of grinding the concave surface of a sphero-cylindrical lens.

An accurate metal prism or plane parallel plate that is cemented to an optical element and remains with it during a series...

The grinding and polishing of rock samples, to a thickness of less than 0.05 mm, for study with petrographic microscopes....

A bevel produced by grinding with a cup-shaped tool.

A method used to produce precision spherical and aspheric molded glass lenses without grinding or polishing.

A term used to describe a very coarse grinding process.

A molded lens is an optical lens manufactured using a molding process, typically involving the shaping of a material, such...

The removal of sharp edges by grinding.

Pitch, wax, resin or other cement suitable for holding optical parts to a spindle during grinding and polishing processes.

Computer numerically controlled (CNC) grinding is a manufacturing process that utilizes computerized controls and precision...

The process of grinding the convex surface of a convexo-concave meniscus.

1. In optics, one of the exterior faces of an optical element. 2. The process of grinding or generating the face of an...

The process of grinding the toric surface of a single vision sphero-cylindrical lens.

A crude area on the polished surface, produced during coarse grinding, that subsequent fine grinding does not remove, owing,...

A defect on a polished optical surface whose length is many times its width. Block reek is a chainlike scratch formed in...

The process whereby blanks are attached to a block in a position for grinding or polishing.

Machinery used to grind and finish a component, such as a lens or prism, to a desired precision. Usually such machines carry...

A bubble at a polished surface that has been opened by grinding or polishing.

Any of the numerous powders used for grinding and polishing glass, crystal or metal, the chief material being emery and...

A supporting member used to hold optical parts during grinding and polishing. It also describes the assemblage of optical...

The length of the oscillation of a grinding or polishing lap.

1. The grinding or edging of a lens so that the geometrical center and optical center do not coincide. 2. The shifting of an...

Diamond turning, also known as diamond machining or diamond cutting, is a precision machining process used to produce...

The finishing of the edge of an optical element by grinding.

Also called shining. Grinding and polishing one surface of a blank to permit a more thorough examination for quality.

1. A measure of absorbed dose, equal to the energy imparted by ionizing radiation to a mass of matter corresponding to 1 J...

The process in the manufacture of an optical system that gives it the required geometric shape.

A casting consisting of an optical material molded into the desired geometry for grinding, polishing or, in the case of...

The process whereby a rotating wheel carries grains of an abrasive, suspended in a vehicle, across the surface of the...

A tool of cast iron or another suitable medium used with a slurry of silicon carbide, aluminum oxide or emery for grinding...

A mirror blank refers to the initial piece of material from which a mirror is made. It is typically a flat or slightly...

The name of the mixture of liquid and grinding or polishing compounds used in processing optical materials.

A lens blank is a piece of optical material in a raw, unfinished state, typically in the form of a disk or block, from which...

The curved mark formed when, in the process of generating, a loose or coarse diamond particle from the generating tool...

A plate of glass in which a face has been frosted by grinding or etching. It diffuses light by scattering in directions...