Process for figuring the surface of a metal mirror

Details Process for figuring the surface of a metal mirror Process for figuring the surface of a metal mirror

1988-10-11

1989-07-11

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041296, 2041297, 20412975, 2041298, 20412995, C25F 316

Patent

active

048469440

ABSTRACT:
A process for figuring the surface of a beryllium mirror to a predetermined urvature wherein the configuration of the mirror surface is sensed to locate areas of the mirror surfaces which are higher than desired and then a stream of phosphoric acid diluted with water and ethylene glycol is directed into contact with the areas of the mirror which are higher than desired while at the same time a current of 10 to 200 milliamps is passed through the stream to the mirror to electro-chemically polish the mirror surface.

REFERENCES:
patent: 2588734 (1952-03-01), Kolodney
patent: 2594124 (1952-04-01), Charlesworth
patent: 3810829 (1974-05-01), Fletcher et al.
patent: 4456516 (1984-06-01), Schaffner
patent: 4541909 (1985-09-01), Fromson

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