SECONDARY CHROMATIC ABERRATIONS OF COLLIMATOR LENS OPERATING IN 400—900 NM RANGE
Университет ИТМО; профессор кафедры ПиКО
E. . Tsyganok
ITMO University, Faculty of Engineering Research; Associate Professor
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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
