SU877457A1

SU877457A1 - Zoom lens cell

Info

Publication number: SU877457A1
Application number: SU792762326A
Authority: SU
Inventors: Людмила Вольдемаровна Зейде; Лев Наумович Кром; Раиса Ивановна Чернякова
Original assignee: Предприятие П/Я Р-6947
Priority date: 1979-05-04
Filing date: 1979-05-04
Publication date: 1981-10-30

Description

(54), ОПРАВА ОБЪЕКТИВА С ПЕРЕМЕННЫМ ФСКУСНЫМ РАССТОЯНИЕМ(54), LENS RIMS WITH VARIABLE PSUCH DISTANCE

II

Изобретение относитс к кинотехнике и может быть использовано в объективах с перемещаюшейс ваоль оптической оси диафрагмой с переменным диаметром отверсти , особенно в объективах со значительным перемещением оптического компонента. The invention relates to motion picture technology and can be used in lenses with an optical axis of the optical axis moving with a diaphragm with a variable aperture diameter, especially in lenses with significant movement of the optical component.

Известен объектив, содержащий подвижно установленную диафрагму и снабженый приводным устройством дл перемещени диафрагмы , выполненным в виде гибкой св - ,r .tlUA known lens comprising a movably mounted aperture and equipped with a driving device for moving the diaphragm, made in the form of a flexible aperture, r .tlU

эиСЦ.eiSTS.

Однако такое устройство не позвол ет управл ть диаметром отверсти диафрагмы по строго определенному закону, а именно в зависимости от фокусного рассто ни при.. заданных величинах относительно отверсти .However, such a device does not allow the diameter of the aperture to be controlled according to a strictly defined law, namely, depending on the focal distance at given values relative to the aperture.

Известна оправа объектива с переменным фокусным рассто нием, содержаща тубус, кулачок изменени фокусного р осто ни , ) , включающую кс юнку: с пальцем, кольцо установки диафрагмы, основную кулису, вза модействующ о е пальцем ккронки диафрагмы, и дополни тельный кулачок r2j.The known rim of the lens with a variable focal distance, containing the tube, the cam of the change of the focal length,), includes a knight: with a finger, a diaphragm mounting ring, the main slide, interacting with the finger of the diaphragm finger, and an additional cam r2j.

Недостатком известной оправы вл ет с то, что в ней поворотный кулачок выполнены в виде пространственных деталей, что усложн ет технологию их изготовлени и сборки.A disadvantage of the known rim is the fact that the rotating cam therein is made in the form of spatial details, which complicates the technology of their manufacture and assembly.

Цель изобретени - повышение технологичности изготовлени деталей и сборки оправы объектива.The purpose of the invention is to improve the manufacturability of parts manufacturing and assembly of the lens mount.

Указанна цель досЙ1гаетс тем, что оправа объектива снабжена дополнительной плоской кулисой, шарнирно св занной с основной кулисой и установленной неподвижно , при этом кулачок изменени фокусного расто ни , дополнительный кулачок и основна кулиса вьшолнены плоскими , причем кулачок изменени фокусного рассто ни и дополнительный кулачок установлены неподвижно, а основна кулиса шарнирно св зана с дополнительным кулачком .This goal is achieved by the fact that the lens rim is provided with an additional flat slide, pivotally connected to the main slide and fixed, while the focal zoom cam, extra cam and main rocker are flush with the fist, and the cam of the focal distance and extra cam are fixed , and the main link is pivotally connected with an additional cam.

Claims

The drawing shows a diagram of a rim lens with a variable focal length. , 3, The frame contains a tube 1, inside of which are movable optical components 2 and 3 in the frames, 2 and 3, a diaphragm 4, which includes a crown 5, which is threaded by an EV finger on the tube 1 and a diagonal setting ring is located {{phagma 7, the rim of the component 3 is connected to the cam. 8, the focal distance is varied by means of the lever 9 and the axis 1. O. The lens frame is provided with a main slide 11, one end of which is connected to the additional cam 12 and the other to the additional slide 13. The diaphragm is connected to the slide 11c using your finger. The cam 8 focal lengths The additional cam 12, the secondary link 13 and the front 14, which serve to direct the movement of the tube 1 with the optical components 2 and 3, when the focal distance changes, are fixed at the base of the lens 15 and the frame operates as follows. One end of the main link 11, moving around the additional arm of the Backstage 1, is fixed at a location corresponding to the required relative aperture of the diaphragm. The main link 11 is set at an angle relative to the guides 14, the angle of inclination depends on the relative aperture set by turning the ring 7. To change the focal distance of the objective, the tube 1 with the optical components 2 and 3 moves along the guides 14. At this 6 m component 3, due to its connection with the help of the lever 9, turning around the axis 10, with the cam 8 of the focusing distance, receives an additional movement along the optical axis relative to the optical component

2. When the focal distance is changed, the diaphragm 4 moves together with the crown 5, while the finger 6, which interacts with the main slide 11, rotates the crown 5 around the optical axis, changing the diameter of the aperture opening, which is necessary for the constancy of the relative aperture. The proposed design of the frame of an objective with a variable focus of 1m distance, ensuring the constancy of the relative aperture throughout the entire range of change of the focal distance, is more technological in manufacturing and convenient in assembly. In addition, a simple configuration preserves the position of the image plane. The invention of the rim of the lens with a variable focal distance, containing a tube, a cam of changing the focal distance, a diaphragm including a crown with a finger, a diaphragm mounting ring, a main link interacting with the finger of the crown of the diaphragm, and an additional cam, different from that the purpose of improving the manufacturability of parts and assembly of the lens mount, it is equipped with an additional flat link, pivotally connected to the main slide and fixedly mounted, while the cam of changing the photon usnogo distance, an additional cam and the main rocker are flat cam 11richem focal distance and an additional cam is fixedly mounted, and the major scharnirno slotted link associated with the additional cam. Sources of information taken into account in the examination 1. USSR author's certificate number ZO84O1, cl. 302 B 15/18, 02.08.71. 2, USSR Author's Certificate No. 64О233, cl. GO3 B 9/07, 08.18.77. (prototype).