CN-116182636-B - Continuous zoom gun sighting telescope with stable exit pupil plane and wide field of view

Abstract

The invention discloses a continuous zoom gun sighting telescope with stable exit pupil surface and wide field of view, which sequentially comprises a front fixed group, a zoom group, a compensation group, a rear fixed group and an eyepiece from an object side to an image side along the optical axis direction. When the zoom group is farthest from the front fixed group, the gun sight is at the lowest magnification and the largest view field, and when the zoom group is nearest to the front fixed group, the gun sight is at the highest magnification and the smallest view field. The exit pupil distance of the gun sighting telescope is 90mm, the aperture of the exit pupil is 3mm, the field of view variation range is 2.3-23 degrees, and the zoom magnification range is 1-10 times. The invention realizes stable position of the exit pupil surface, unchanged size of the exit pupil aperture, high zoom ratio and large view field range observation and aiming of the target, and provides convenience for quickly finding and locking the target.

Inventors

• GONG TIANLIN
• PAN BAOZHU

Assignees

• 南通大学

Dates

Publication Date

20260505

Application Date

20230223

Claims (1)

1. 1. A continuous zoom gun sight with stable exit pupil surface and wide field of view is characterized in that the exit pupil distance of the continuous zoom gun sight is 90mm, the exit pupil aperture is 3mm, the field of view is 2.3-23 degrees, and the zoom magnification is 1-10 times; The continuous zoom gun sighting telescope is sequentially provided with a front fixed group lens, a zoom group lens, a compensation group lens, a rear fixed group lens and an eyepiece from the object side to the image side along the optical axis direction; the zoom lens and the compensation lens axially move along the optical axis direction to change the view field and the multiplying power, and in the zoom process, the zoom lens and the compensation lens always move towards the front fixed lens, and when the zoom lens is farthest from the front fixed lens, the gun sight is at the lowest multiplying power and the largest view field; the front fixed group lens consists of 6 mirrors, the last single lens of the front fixed group lens plays a role of a field lens, and the front 5 mirrors have a structure of single-single+double-single; the zoom lens is of a double-gluing structure, and the focal length of the zoom lens is positive; the compensating group lens is of a double-single structure, and the focal length of the compensating group lens is positive; the rear fixed group lens has a field lens function and has a double-single structure and a single structure, wherein the focal length of the rear fixed group lens is negative; The ocular is of a double-single structure; all lenses are spherical lenses.

Description

Continuous zoom gun sighting telescope with stable exit pupil plane and wide field of view Technical Field The invention belongs to the field of optical design and manufacture, and particularly relates to a continuous zoom gun sighting telescope with stable exit pupil surface and a large-range view field. Background With advances in science and technology, gun sights are evolving toward high zoom ratios (up to 10), large fields of view (over 20 degrees), miniaturization, and high imaging quality. The zoom ratio of the sighting telescope for the common gun in the existing market is generally 3-5 times, the visual field is 8-12 degrees, and the position of the exit pupil surface and the exit pupil aperture cannot be kept stable. The gun sighting telescope with small visual field, no easy finding and tracking of fast moving target, stable position and aperture, no easy locking of sighting target, high zoom ratio, wide visual field and stable exit pupil surface is necessary. There is no gun sight in the prior art with a field energy exceeding 20 degrees. Disclosure of Invention The invention aims to solve the defects of the prior art, and provides a continuous zoom gun sighting telescope with stable exit pupil surface and wide field of view. The technical scheme is that the continuous zoom gun sighting telescope with stable exit pupil surface and wide field of view is characterized in that the exit pupil distance of the continuous zoom gun sighting telescope is 90mm, the exit pupil diameter is 3mm, the field of view is 2.3-23 degrees, and the zoom magnification is 1-10 times. The continuous zoom gun sighting telescope is provided with a front fixed group lens, a zoom group lens, a compensation group lens, a rear fixed group lens and an eyepiece in sequence from an object side to an image side along the optical axis direction; the zoom lens and the compensation lens move axially along the optical axis to change the view field and the multiplying power, the zoom lens and the compensation lens always move forward in the direction of the fixed group in the zoom process, when the zoom lens is farthest from the front fixed group lens, the gun sight is at the lowest multiplying power and the largest view field, and when the zoom lens is nearest to the front fixed group lens, the gun sight is at the highest multiplying power and the smallest view field. The front fixed group lens is composed of 6 mirrors, the last single lens of the front fixed group lens plays a role of a field lens, the front 5 mirrors are in a single-single+double-single structure, and the focal length of the front fixed group lens is positive. The lens of the variable magnification group is of a double-gluing structure, and the focal length of the lens of the variable magnification group is positive. The lens of the compensation group is in a double-single structure, and the focal length of the lens of the compensation group is positive. The rear fixed group lens has the field lens function, the structure is of a double-single+single structure, and the focal length of the rear fixed group lens is negative. Preferably, the ocular is of a double-single structure. As an optimization, all lenses are spherical lenses. The invention has the beneficial effects that the invention realizes stable position of the exit pupil surface, unchanged size of the exit pupil aperture, high zoom ratio and large view field range observation and aiming of the target, and provides convenience for quickly finding and locking the target. Drawings FIG. 1 is a schematic view of a gun telescope with a 1-fold zoom and a 23-degree field of view; FIG. 2 is a schematic illustration of MTF curves for a 1-fold zoom of the present invention; FIG. 3 is a schematic illustration of MTF curves for a 2-fold zoom of the present invention; FIG. 4 is a schematic illustration of the MTF curve of the present invention at 5-fold zoom; Fig. 5 is a schematic illustration of MTF curves for 10-fold zoom of the present invention. Detailed Description The following technical solutions in the embodiments of the present invention will be clearly and completely described so that those skilled in the art can better understand the advantages and features of the present invention, thereby making a clearer definition of the protection scope of the present invention. The described embodiments of the present invention are intended to be only a few, but not all embodiments of the present invention, and all other embodiments that may be made by one of ordinary skill in the art without inventive faculty are intended to be within the scope of the present invention. Examples As shown in figure 1, the continuous zoom gun sight with stable exit pupil surface and wide field of view is provided, wherein the exit pupil distance of the continuous zoom gun sight is 90mm, the exit pupil aperture is 3mm, the field of view is 2.3-23 degrees, and the zoom magnification range is 1-10 times. The continuous zoom gun sighting te