Design of Cooke triplet anastigmats: the effect of non-optimum flint glasses

Warren J. Smith

doi:10.1117/12.219504

15 September 1995 Design of Cooke triplet anastigmats: the effect of non-optimum flint glasses

Warren J. Smith

Proceedings Volume 2540, Current Developments in Optical Design and Engineering V; (1995) https://doi.org/10.1117/12.219504
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

This study investigates the effects of changing the flint glass of a Cooke triplet from the optimum glass type, in an attempt to determine how many different glass types are necessary. To this end, about 90 triplets were designed, each with a flint glass displaced from its optimum characteristics. Sixteen different combinations of field and aperture, and three different crown glass types were used. Variations of performance with flint changes are presented. An 'acceptable' variation of the flint glass V-value appears to be about plus or minus 2.

Citation Download Citation

Warren J. Smith "Design of Cooke triplet anastigmats: the effect of non-optimum flint glasses", Proc. SPIE 2540, Current Developments in Optical Design and Engineering V, (15 September 1995); https://doi.org/10.1117/12.219504

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