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Contributions to Photographic Optics (1900) Otto Lummer

Contributions to Photographic Optics (1900)

Otto Lummer

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155 pages
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THREE articles which appeared in the autumn of 1897 in the Zeitschrift fur Instrument enkunde, under the title of Contributions to Photographic Optics, from the pen of Professor Otto Lummer of Berlin, attracted the attention of the present writer.MoreTHREE articles which appeared in the autumn of 1897 in the Zeitschrift fur Instrument enkunde, under the title of Contributions to Photographic Optics, from the pen of Professor Otto Lummer of Berlin, attracted the attention of the present writer. They were found to give in concise form information not to be found elsewhere- and they presented that information in a manner so logical and so direct as to be of immediate value in scientific optics. Further, they contained an exposition of the remarkable theories of Professor L. von Seidel of Munich, whose work in the domain of geometrical optics, particularly in relation to the aberrations of lenses, was far too little known to optical writers. To those whose knowledge of theoretical optics has been gained from elementary text-books, and who may be dimly aware of something called spherical aberration, and of something else called chromatic aberration, it may come as a surprise to find that for the purposes of constructing good photographic lenses there are no fewer than five different kinds of aberration of sphericity and two different kinds of aberration of colour to be taken into account, as well as the chromatic differences of the spherical aberrations.