25 September 1997 Hybrid singlet lens applied to visible telescope objective design
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Abstract
The design of a hybrid diffractive-refractive singlet to replace a conventional doublet objective lens is studied. The method for designing the initial configuration is presented based on the correction of the spherochromatism and spherical aberration. The examples given in this paper show that by using the modified formula one can get a better initial configuration without the significant spherochromatic aberration introduced by the aspheric term of DOE's polynomial. Finally a hybrid singlet in visible wave band ( ? from 656.3nm to 486.1 mn) is successfully designed. In comparison with traditional doublet, this hybrid singlet has smaller aberration, simplified configuration and only one material BK7 used. Experimental results show that the diffraction efficiency of DOE is the bottleneck for the hybrid optical system to be actually used in the image field.
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Liping Zhao, Liping Zhao, Minxian Wu, Minxian Wu, Yingbai Yan, Yingbai Yan, Guofan Jin, Guofan Jin, } "Hybrid singlet lens applied to visible telescope objective design", Proc. SPIE 3130, Lens Design, Illumination, and Optomechanical Modeling, (25 September 1997); doi: 10.1117/12.284049; https://doi.org/10.1117/12.284049
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