Method for manufacturing hyperbolic surface

Details Method for manufacturing hyperbolic surface Method for manufacturing hyperbolic surface

1981-01-27

1983-03-08

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51284R, 82 12, 82 18, 264 25, 264 27, B24B 100, B24B 1300

Patent

active

043757391

ABSTRACT:
An optical lens having a hyperboloid surface is formed by cutting or grinding a workpiece made of glass or plastics while rotating it about its axis, while a cutting or grinding tool having a linear working edge is rotated or swung about a central axis, the working edge is separated from the center axis by a given distance and is inclined with respect to the central axis by a given angle. The envelope of the working edge forms a hyperboloid of one sheet of revolution along which the workpiece is cut or ground. An eccentricity of the hyperboloid curve can be adjusted by changing the inclined angle of the working edge with respect to the central axis.

REFERENCES:
patent: 1803429 (1931-05-01), Ganning
patent: 2333985 (1943-11-01), Clark
patent: 2568040 (1951-09-01), Touray
patent: 3079732 (1963-03-01), Rawstron
patent: 3142140 (1964-07-01), Ishida
patent: 3739822 (1973-06-01), Loof
patent: 3842713 (1974-10-01), Hamilton

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