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Proceedings Paper

Improvements In The Calculation Of White Light Modulation Transfer Function (MTF) In Japan Optical Engineering Research Association (JOERA)
Author(s): Setsuo Minami; Ryota Ogawa
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Paper Abstract

Consequences of the working project formed in JOERA (JAPAN OPTICAL ENGINEERING RESEARCH ASSOCIATION) from 1976 to 1978 are to be reported. The question, "What is the most reasonable number of mesh divides of entrance pupil to get monochromatic OTF and the most economical sampling method of spectral wavelengths to calculate White Light MTF?" is important in the actual stage of designing to optimize the conflict relationship between numerical accuracy and computing time. We have examined the spectral characteristics of OTF using some typical lenses such as photographic telephoto lens and wide angled retrofocus lens, cleared the structure of the White Light MTF, and found some techniques to get the reasonable numerical results. As a result of trial experiments to get coincidence between measurements and calculat-ions, the standard filter, which should be added to the MTF lens tester and whose spectral transmittance should be installed in the calculation, are proposed.

Paper Details

Date Published: 16 September 1980
PDF: 9 pages
Proc. SPIE 0237, 1980 International Lens Design Conference, (16 September 1980); doi: 10.1117/12.959082
Show Author Affiliations
Setsuo Minami, Canon, Inc. (Japan)
Ryota Ogawa, Asahi Optical Co. Ltd. (Japan)


Published in SPIE Proceedings Vol. 0237:
1980 International Lens Design Conference
Robert E. Fischer, Editor(s)

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