Method of using external system for locating the geometric cente

Details Method of using external system for locating the geometric cente Method of using external system for locating the geometric cente

1988-07-22

1990-02-20

Lindsay, Robert L.

Glass manufacturing

Processes

With measuring, sensing, inspecting, indicating, or testing

65 39, 65 47, 65 61, 65357, 220 21A, 313408, C03B 0000

Patent

active

049023292

ABSTRACT:
A system is disclosed for externally locating the geometric center of an internal lens element which requires that an external reference surface be accurately formed so as to lie concentrically with the central axis of the internal lens element. This is a accomplished in a pressing operation by precisely aligning and securing a ring element to a plunger member. Three points are then selected on the outer reference surface which are not only utilized for positioning the internal lens element for grinding an outer surface to a desired thickness, but also are utilized for aligning and affixing an external lens system in geometric alignment with the internal lens.

REFERENCES:
patent: 3369881 (1968-02-01), Bennett et al.
patent: 3390974 (1968-07-01), Parsons et al.
patent: 3558298 (1971-01-01), Carmi et al.
patent: 3737065 (1973-06-01), Palac
patent: 4150320 (1979-04-01), Mitchell et al.
patent: 4387404 (1983-06-01), Feinberg et al.
patent: 4672458 (1987-06-01), McKechnie

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