Abstract
THE manufacture of optical instruments of many kinds for the Armed Forces has become an important section of the extensive programme of munitions production undertaken by Australia in the present emergency. Of necessity, a new and complex industry of this type had to cope with many initial problems, among which the supply of suitable optical glass soon began to cause anxiety. Some glass was obtained from Great Britain and the United States, but in the dark months following the capitulation of France optical glass of good quality and in sufficient quantity was not obtainable. In certain directions, the need became so great that spectacle lenses were used, and blocks of glass for the prisms of tank periscopes had to be made by welding together many sheets of plate glass.
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HARTUNG, E. PRODUCTION OF OPTICAL GLASS IN AUSTRALIA. Nature 149, 518–519 (1942). https://doi.org/10.1038/149518a0
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DOI: https://doi.org/10.1038/149518a0