Semi-fixed astronomical mirrors and aspherical gratings and meth

Details Semi-fixed astronomical mirrors and aspherical gratings and meth Semi-fixed astronomical mirrors and aspherical gratings and meth

1980-12-17

1983-05-10

Henry, Jon W.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including plural heating steps

350320, 350310, 65102, 65107, 264 27, 264 19, G02B 510, G02B 718, B29D 1100, C03B 23035

Patent

active

043826571

ABSTRACT:
The invention relates to astronomical mirrors or aspherical gratings which are obtained from a blank which is composed, in one piece, of a thin disc having a reflecting surface and of a cylindrical ring coaxial with the disc which is connected thereto by a semi-fixing. The ring is applied on a rigid support with which it defines a cavity in which a pressure pi is applied while the reflecting face is surfaced along a plane or spherical surface. The pressure pi is then varied, this causing a flexion of the disc.

REFERENCES:
patent: 694685 (1902-03-01), Sievert
patent: 2970405 (1961-02-01), Giffen
patent: 4119366 (1978-10-01), Lemaitre

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