ISSN 0021-3454 (print version)
ISSN 2500-0381 (online version)
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3
Issue
vol 60 / MARCH, 2017
Article
UDC 535.31

SECONDARY CHROMATIC ABERRATIONS OF COLLIMATOR LENS OPERATING IN 400—900 NM RANGE

Грамматин А. П.
Университет ИТМО; профессор кафедры ПиКО


E. . Tsyganok
St. Petersburg State University of Information Technologies, Mechanics and Optics, Department of Applied and Computer Optics; Post-Graduate Student


Abstract. In 400—900 nm spectral range, the secondary chromatic aberrations of a lens system consisting of a combination of "usual" glasses increase by a factor of 7.5 as compared with 480—643,8 nm range. It is shown that essential reduction of the secondary spectrum is achieved in three-lens systems with the use of at least one “special” glass.
Keywords: chromatic aberration, secondary spectrum, “special” glasses, Abbe diagram