УДК: 535.317.2

Apochromatic objectives for amateur and professional astronomy

Sharov, А.А., Molev, V.I., Ponin, O.V., Grudzino, Y.B., Fufurin, V.V.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Шаров А.А., Молев В.И., Понин О.В., Грудзино Ю.Б., Фуфурин В.В. Объективы-апохроматы для любительской и профессиональной астрономии // Оптический журнал. 2013. Т. 80. № 4. С. 43–46.

Sharov A.A., Molev V.I., Ponin O.V., Grudzino Yu.B., Fufurin V.V. Apochromatic objectives for amateur and professional astronomy [in Russian] // Opticheskii Zhurnal. 2013. V. 80. № 4. P. 43–46.

For citation (Journal of Optical Technology):

A. A. Sharov, O. V. Ponin, Yu. B. Grudzino, V. V. Fufurin, and V. I. Molev, "Apochromatic objectives for amateur and professional astronomy," Journal of Optical Technology. 80(4), 233-235 (2013). https://doi.org/10.1364/JOT.80.000233

Abstract:

This paper discusses the features of objectives intended for amateur and professional astronomical observations. Type-OK4 crown glass with special dispersion behavior is used to achieve apochromatic correction in refracting objectives, since the technology for obtaining high-quality blanks made from this glass makes it possible to create apochromatic objectives with an entrance-pupil diameter of up to 304 mm. Experimental compositions of the glass have been developed that make it possible to obtain apochromatic systems composed of two lenses.

Keywords:

objective, secondary spectrum, apochromatic correction

OCIS codes: 220.0220, 220.3620

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