IODC98 optical design problem: method of progressing from an ahromatic to an apochromatic design

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A general method of designing an apochromatic lens by using a triplet of special glasses, in which the buried surfaces concept is used, can be outlined. First, one initially chooses a starting point which is already achromatic. Second, a thick plate or shell is added to the design, where the plate or shell has an index of refraction 1.62, which is similar to the special glass triplet average index of refraction (for example: PSK53A, KZFS1 and TIF6). Third, the lens is then reoptimized to an achromatic design. Fourth, the single element is replace by the special glass triplet. Fifth, only ... continued below

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Seppala, L.G. July 20, 1998.

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A general method of designing an apochromatic lens by using a triplet of special glasses, in which the buried surfaces concept is used, can be outlined. First, one initially chooses a starting point which is already achromatic. Second, a thick plate or shell is added to the design, where the plate or shell has an index of refraction 1.62, which is similar to the special glass triplet average index of refraction (for example: PSK53A, KZFS1 and TIF6). Third, the lens is then reoptimized to an achromatic design. Fourth, the single element is replace by the special glass triplet. Fifth, only the internal surfaces of the triplet are varied to correct all three wavelengths. Although this step will produce little improvement, it does serve to stabilize further optimization. Sixth and finally, all potential variables are used to fully optimize the apochromatic lens. Microscope objectives, for example, could be designed using this technique. The important concept to apply is the use of multiple buried surfaces in which each interface involves a special glass, after an achromatic design has been achieved. This extension relieves the restriction that all special glasses have a common index of refraction and allows a wider variety of special glasses to be used. However, it is still desirable to use glasses which form a large triangle on the P versus V diagram.

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1032 Kilobytes pages

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  • Optical Society of America 1998 Summer Topical Meetings, Kailua-Kona, HI (US), 06/08/1998--06/12/1998

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  • Report No.: UCRL-JC-131432
  • Report No.: 39DP02000
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 2804
  • Archival Resource Key: ark:/67531/metadc670982

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 20, 1998

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  • June 29, 2015, 9:42 p.m.

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  • May 6, 2016, 1:31 p.m.

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Seppala, L.G. IODC98 optical design problem: method of progressing from an ahromatic to an apochromatic design, article, July 20, 1998; California. (digital.library.unt.edu/ark:/67531/metadc670982/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.