Gob Preforms

Ebook Topic:
Gob Preforms

Book: Field Guide to Molded Optics

Author(s): Michael Schaub, Alan Symmons

Published: 2016

https://doi.org/10.1117/3.2230581.ch40

Abstract

A gob can be defined as a “mass” or a “lump.” In the case of gob preforms the term is appropriate. The shape of a gob is difficult to describe and varies from manufacturer to manufacturer. A gob preform is a precisely controlled volume of glass manufactured specifically for PGM; it has precise volume control and good surface quality.
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