Proceedings PaperAberrations in large lenses
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The design of large lenses, say 0.2 to 1.0 meters in diameter, is potentially an area for development, but progress is sporadic. Designs for large lenses, complicated as they are by the optical properties of glass, are more difficult than those for reflecting systems. This paper makes an initial survey in which various problems of large lenses are outlined. An extreme, historical problem in the design of large lenses is re-examined as a basis for moving forwards in future applications. Examples of modern large lenses are briefly discussed.