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27 August 1999 Aplanatic cemented doublets achromatized with normal glasses in the visible spectrum
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Abstract
This paper presents a systematic study of aplanatic cemented doublets acromatized with normal glasses in the visible spectrum in order to answer some questions concerned with residual aberrations such as zonal spherical aberration, oblique spherical aberration, spherochromatism and secondary spectrum. Two of the questions concerned with these residual aberrations are: (1) is it possible to reduce even by a small amount any of these aberrations by selecting an appropriate pair of glasses, and (2) is there any advantage in having the crown in front of the flint when designing a doublet. To answer these questions a study is being carried out for a doublet with an aperture of 2.0 inches and a semi- field of view of 1 degrees. The doublets are designed for six f-numbers: f/5.6, f/4.0, f/2.8, f/2.6, f/1.8 and f/1.6 when the crown is in front of the flint. All solutions have the same thickness on axis for the flint and the same thickness on the edge for the crown. This analysis is also performed for a double having the flint in front of the crown. The results are presented and discussed.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Martha Rosete-Aguilar and Juan L. Rayces "Aplanatic cemented doublets achromatized with normal glasses in the visible spectrum", Proc. SPIE 3737, Design and Engineering of Optical Systems II, (27 August 1999); https://doi.org/10.1117/12.360025
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