SU907496A1

SU907496A1 - Achromatic lens

Info

Publication number: SU907496A1
Application number: SU802948859A
Authority: SU
Inventors: Нина Ивановна Куликовская; Алла Николаевна Хонинева; Нинель Андреевна Черняк; Мария Израилевна Слоущ; Нина Константиновна Кудрина
Original assignee: Предприятие П/Я Р-6681
Priority date: 1980-07-02
Filing date: 1980-07-02
Publication date: 1982-02-23

Description

иетверта и шеста - отрицательные линзы, втора , треть и п та - положительные линзы, отличающи йс тем, что с: целью уменьшени хроматических, аберраций в широкой области спектра при вынесенном входного зрачке, в него дополнительно введена положительна дво ковыпукла линза, расположенна между п той иThe quadrant and pole are negative lenses, the second, third and fifth are positive lenses, characterized in that with: the aim of reducing chromatic aberrations in a wide spectral region when the input pupil is removed, a positive two-fold lens is introduced into it, that and

шестой линзами, а треть линза выполнена в виде мениска, обращенного вогнутостью к предмету.sixth lens, and a third lens is made in the form of a meniscus, facing the concavity to the subject.

Источники информации, прин тые во внимание при экспертизеSources of information taken into account in the examination

1.Патент Великобритании W 1394247, кл. G 02 J, 1975.1. The patent of Great Britain W 1394247, cl. G 02 J, 1975.

2.Патент Японии 47-36424, Kjri. 104 А 412, 1972.2. Japanese Patent 47-36424, Kjri. 104 A 412, 1972.

1 г 31 g 3

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Claims

SUMMARY OF THE INVENTION Achromatic lens containing six lenses, of which the first. the fourth and sixth · are negative lenses, the second, third and fifth are positive lenses, characterized in that, in order to reduce chromatic aberrations in a wide ♦ region of the spectrum when the entrance pupil is extended, a positive biconvex lens located between fifth and sixth lenses, and the third lens is made in the form of meniscus, facing concavity to the subject.

Sources of information taken into account during the examination - 1. British patent ^E No. 1394247, cl. G 02 J, 1975.

2. Japanese Patent No. 47-36424, cd. 104 A 412, 1972.