Mirrors with a variable focal distance

Details Mirrors with a variable focal distance Mirrors with a variable focal distance

1976-12-02

1978-10-10

Henry, Jon W.

G02B 510

Patent

active

041193660

ABSTRACT:
Mirrors with a variable focal distance composed of a disc of revolution about an axis having a reflecting surface. Said disc has a variable thickness and is bent elastically by applying thereto a distributed load or an axial load and by balancing this load by a central or peripheral bearing pressure. The deformation obtained is parobolic provided that the variable thickness of the disc varies as a function of the radius from the axis.
One application of the present invention is the manufacture of mirrors with a variable focal distance.

REFERENCES:
patent: 3514776 (1970-05-01), Mulready
patent: 3893755 (1975-07-01), Cobarg et al.
patent: 3972600 (1976-08-01), Cobarg

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