Parabolic reflector comprising a plurality of triangular reflect

Details Parabolic reflector comprising a plurality of triangular reflect Parabolic reflector comprising a plurality of triangular reflect

1981-06-11

1983-02-08

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65104, 65107, 65289, 264 27, 264339, 350295, 350310, C03B 23023

Patent

active

043727727

ABSTRACT:
The geometric pattern for the support framework is obtained by projecting a subdivided icosahedron onto a parabolic surface. The resulting framework has forty primary planar triangular faces or sections, each of which are, in the embodiment shown, subdivided equally into 4 secondary planar triangular sections. At the dead center of the framework pattern is the outline of a pentagon, formed of five equal-size triangular sections. The framework terminates in a rim which lies completely in a single plane. Triangular reflecting members, which comprise the reflecting surface portion of the apparatus, are supported interiorly of the framework by standoff elements. Intermediate along each edge of the reflecting members is a tensioning element which bends the reflecting member so that the intermediate edge points, as well as the vertices of each reflecting member, lie on the surface of an imaginary paraboloid, the reflecting members thus approximating a parabolic curve.

REFERENCES:
patent: 2707903 (1955-05-01), Trombe
patent: 3261016 (1966-07-01), Burr
patent: 3822122 (1974-07-01), Plumat et al.
patent: 4095968 (1978-06-01), Bristow
patent: 4115486 (1978-09-01), Cowman et al.
patent: 4199342 (1980-04-01), Mestre et al.

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