SU883839A1

SU883839A1 - Lens with extended entrance pupil

Info

Publication number: SU883839A1
Application number: SU802931159A
Authority: SU
Inventors: Инесса Петровна Полякова; Полина Алексеевна Поротикова
Original assignee: Предприятие П/Я Р-6681
Priority date: 1980-05-27
Filing date: 1980-05-27
Publication date: 1981-11-23

Description

(54) ОБЪЕКТИВ С ВЫНЕСЕННЫМ ВХОДНЫМ ЗРАЧКОМ(54) LENS WITH EXTRACTED ENTRY LENS

II

Изобретение относитс к оптическому приборостроению, а именно к линзовым объективам и может примен тьс вместе с другим объективом в телескопических системах большого увеличени с высокой разрешающей способностью дл работы в любом спектральном диапазоне.The invention relates to optical instrumentation, namely lens lenses and can be used with another lens in high-resolution, high-resolution telescopic systems for operation in any spectral range.

Известен объектив, состо щий из центрального компонента, размещенных перед ним одиночного положительного и отрицательного менисков и расположенных позади него двух положительных менисков },A lens is known, consisting of a central component, a single positive and negative meniscus placed in front of it and two positive meniscuses located behind it},

Однако величина выноса входного зрачка мала.However, the magnitude of the removal of the entrance pupil is small.

Известен объектив с вынесенным входным зрачком, содержащий четыре компонента, из которых второй и третий положительные, причем второй состоит из положительной и отрицательной линз 2.Known lens with the rendered entrance pupil, containing four components, of which the second and third are positive, and the second consists of positive and negative lenses 2.

Однако, если этот объектив использовать в телескопической системе вHowever, if this lens is used in a telescopic system in

паре с другим объективом, с ооычным расположением -меридианальной кривизны пол зрени , имеющей отрицательное значение, то его конструкци не позвол ет получить компенсации аберраций .If a pair with another lens is located at the meridional curvature of the field of view that has a negative value, then its design does not allow compensation for aberrations.

Целью изобретени вл етс повьппение качества изображени , исключение виньетировани наклонных пучков за счет улучшенной коррекции аберраций.The aim of the invention is to improve the image quality, to avoid the vignetting of oblique beams due to the improved correction of aberrations.

Claims

This goal is achieved by the fact that in a lens with a rendered entrance pupil containing four components, of which the second and third are positive, and the second consists of positive and negative lenses, the first component is in the form of a negative two-glued meniscus convex to the object, the third component is made of the single positive and negative meniscus convex to the subject, and the fourth component is the single negative 3, the meniscus facing curvature to Redmet, wherein the second lens Components are installed with an air gap. The drawing shows a schematic diagram of the proposed lens consisting of four components 1-4. The first component of the lens consists of 5 negative and 6 positive menisci forming a glued negative meniscus, the second component consists of a two-convex lens 7 and a negative meniscus 8 separated by a small air gap the third the component consists of a positive meniscus 9 and a negative domain 10, separated by a small air gap; the fourth component is a negative meniscus. The proposed lens improves image quality on a surface having a positive curvature when the entrance pupil is removed by an amount greater than the focal length and the vignetting of inclined beams is excluded. Claims of the invention: A lens with a remote pupil, containing four components, of which the second and third are positive, the second consisting of positive and negative lenses, characterized in that, in order to improve the image quality and eliminate the vignetting of oblique beams, due to the improved correction of aberrations , the first component is made in the form of a negative duplex meniscus convex to the object, the third component is made of single positive and negative menisci, convexity to the object, and the fourth component is a single negative meniscus, facing the concavity of the object, with the second component lens installed with an air gap. Sources of information taken into account in the examination 1. The author's certificate of the USSR 1 432441, cl. G 02 B 11/34, 1974.

2. The patent of France No. 2141525, cl. G 02 B 9/00, 1973 (prototype),