Sighting telescope optical system for gun

Abstract

The invention discloses a sighting telescope optical system for a gun, comprising an objective lens group, a transferring lens group and an eye lens group which are sequentially arranged from an object side to an image side. The transferring lens group is composed of a first positive lens group, a second positive lens group, a third positive lens group and a fourth positive lens group, wherein, the first positive lens group is arranged fixedly, the second positive lens group and the third positive lens group are arranged movably and the fourth positive lens group is arranged fixedly; and the first positive lens group, the second positive lens group, the third positive lens group and the fourth positive lens group are arranged sequentially from the object side to the image side. The sighting telescope optical system has simple structural design and processing, can obtain larger zoom ratio and relatively larger sighting telescope field of view, and reduce the field angle of the outgoingbeam of a transferring system, thus correspondingly decreasing the lens aperture of an eye lens system at the rear end of a zoom system.

Description

technical field [0001] The invention relates to an optical system of a sight, in particular to an optical system of a sight of a gun. Background technique [0002] At present, the optical systems used in military and civilian sights at home and abroad are also composed of an objective lens group, a relay lens group and an eyepiece group, but the relay lens group adopts the traditional two-positive lens group to move to achieve The traditional and classic way of zooming, in which the first lens group near the object side moves to compensate for image surface drift, and the second lens group near the image side moves to achieve zooming. The use of optical performance requirements, however, this traditional zoom conversion system also has many defects, usually the zoom ratio cannot exceed 5 times, otherwise other aspects of the optical performance will be sacrificed, or the system complexity will be increased. bring more technical difficulties. [0003] In order to change thi...

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Problems solved by technology

[0002] At present, the military and civilian sights used at home and abroad also use an optical system consisting of an objective lens group, a transfer lens group and an eyepiece group, but the transfer lens group uses the traditional two positive lens groups to move. The traditional classic way of zooming, in which the first lens group close to the object side moves to compensate for image plane drift, and the second lens group close to the image side moves to achieve zooming. This zoom transfer system can meet the needs of the entire scope. The use of optical performance requirements, however, this traditional zoom transfer system also has many defects, usually the zoom ratio cannot exceed 5 times, otherwise it will sacrifice other aspects of optical performance, or increase the complexity of the system, making it difficult for the system to achieve Bring more technical difficulties

[0003] In order to change this situation, American REDFIELD company has developed a series of sights with a 5x zoom ratio, which adopts a higher manufacturing process. The three-group lens-type image transfer system, when the position of the lens group changes from low magnification to high magnification, the three lens groups move simultaneously according to their respective running trajectories, but the structure of the sight using this image transfer system is complex and the field of view The optical performance is not high, which restricts the design, promotion and manufacture of this image transfer system sight

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