KR101440057B1 - Separable dot sight for day and night sight system - Google Patents

Abstract

The present invention relates to a separable dot sight for day and night sight system, comprising: collimating lenses including reticles and a collimating lenses group in order from a light source to make aiming point image into parallel light; double mirrors including two reflective surfaces to change the direction of the aiming point image and to transfer it to the magnification lenses; and magnification lenses. The a separable dot sight for day and night sight system can minimize its performance degradation when using as the night sight system associated with night vision goggles because an aiming point generator and an aiming point display portion are separated.

Description

Separable dot sight for day and night sighting system {

The present invention relates to a detachable dot site for a day and night sighting system, and more particularly, to a dot site that can minimize the performance degradation of a night vision sight when used as a night sights by interlocking with a night vision spot, .

Traditionally, the aiming method of a gun was a line of sight alignment that aligns the scale and the scale linearly with the target, mechanically attached to the gun. For precise bore sighting, a lot of time and concentration is needed, so that a visual inspection of the impact point of the bullet or the use of a tracer was designed and used for rapid shooting. The line-of-sight sorting method has a disadvantage in that it is difficult to recognize the surrounding situation because it is closed with one eye and it is difficult to shoot a moving object.

In general, a dot site is a unit magnification aiming device having a point-shaped aiming point attached to a rifle, a machine gun, etc., and reflects an aiming point on a tilted glass surface so that an observer It allows you to observe. The inclined glass surface may be provided with a curvature to form collimating optics. Alternatively, an aspheric lens may be used to more clearly overlap the aiming point on the subject. However, since the aim point image can not be aligned with the diopter of a user, a user whose visual acuity is not 0 diopter can not see a clear aim point and has a disadvantage of seeing a blur aim point. Here, the dot aiming point refers to a simple aiming pattern in which there is no aiming point by a distance such as a point, a circle, and a cross line.

The dot site is a sighting device that projects a bright spot on a back surface of a lens with a structurally flat plate or a curvature lens to superimpose a light spot on a subject. The light spot is generally composed of a red illumination device, Simply aim the gun with the dot site so that the light spot overlaps the subject.

As such, it is possible to rapidly aim by reducing the aiming step, and it is replacing the conventional alignment method using the scale and the scale, and is widely used in the sports field and the military.

The dot site can arrange the sight line quickly and can secure a wide field of view, and it is easy to perceive the surroundings because the two eyes can be opened and aimed. In addition, it is suitable for general infantry shooting aiming equipment as compared with a sine sling having a rapid response shot and easy shooting for a moving target.

At close range, the shooter can move with aiming, and has long eye-relief and wide pupil size with less parallax, comfortable to use.

Also, if anyone has zero, multiple shooters can use it together, and a fast and accurate aiming shot is possible.

Dot site, which is a proximity dedicated aiming device, is parallax-free and can shoot quickly. Especially, it is effective before street and indoor. When the target is aligned with the aiming point, it is easy to set the target. Can be used as a sights.

Theoretically, there is no parallax but the aim point and parallax occur according to the distance of the object. When the monocular night vision is attached to the back or worn on the head, have.

The night vision system is used for various purposes such as military, ecological observation, or police business. It is a device that amplifies weak light in dark environment or nighttime to form a bright image. Such a night vision goggle uses a principle of photoelectric effect, electron number amplification, electroluminescence effect and the like from a blurry image due to insufficient amount of light so as to easily identify a subject even in the dark As the device, the amount of light incident on the objective lens is very important, which greatly affects detection performance and image quality. Therefore, the smaller the aperture diameter (f / number) = the effective focal length / the smaller the entrance pupil, the better the performance. The magnifier is attached to the object of night vision So that it can be observed to a long distance.

Dot sites can be used as a simple aiming device in the daytime because it can increase the accuracy rate by enabling rapid fire in close range. In the nighttime, night vision is attached to the observation side. At this time, the dot site blocks the amount of light incident on the object portion in front of the night vision sensor, thereby deteriorating night vision performance such as detection performance and sharpness. In addition, since the viewing angle of the dot site is generally smaller than the viewing angle of the night view glass (about 40 °), the viewing angle observed with the night view glass is as small as the dot sight viewing angle, which is a great inconvenience. In addition, if a night vision goggle with a magnification is mounted on the dot sight observation side, the amount of light incident on the objective portion is further blocked, thereby remarkably deteriorating the distance observation performance.

Prior art documents relating to the present invention disclose patents 0667472, 1068290, 1116269, and the like.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, and it is an object of the present invention to provide a dot site in which a sighting point generating unit and a display unit are separated, not only for use as a daytime sight scepter but also for use as a night sight sceness, And to provide a detachable dot site for a day and night sighting system which can obtain a clear image by minimizing degradation of resolution and detection performance.

Another object of the present invention is to provide a detachable dot site for a day / night sighting system having a function of adjusting a diopter of an aiming point according to a user's visual acuity, And to provide a separate dot site for a day and night sighting system that can be used as a sight sphere in conjunction with a focusing optical system.

In order to achieve the above-mentioned object, according to an aspect of the present invention, a detachable dot site for a day / night sighting system includes a collimating lens system including a net portion and a collimating lens group in order from a light source side, A double reflex section including two reflection surfaces to change the direction of the aim point image and transmit it to the magnification lens system; An objective lens system, a magnification lens system for reducing magnification to a reflex reflection type optical system which is composed of a reflector and a projection lens group and constitutes a nonfocus optical system for reducing magnification so that a reticle pattern is observed at a long eye distance and a wide exit pupil; .

At this time, each lens group and the reflector satisfy the following expression.

F1? F2,

F2 ² ? 2000 D

F1 / F2 = M? 1

(Where F1 is the effective focal length of the objective lens group, F2 is the effective focal length of the projection lens group, D is the moving distance per one diopter of the reflector, and M is the magnification of the magnification lens system).

In a preferred embodiment of the present invention, a diaphragm may be provided between the double reflex part and the magnification lens system.

As described above, when using the detachable dot site for day and night sighting system according to the embodiment of the present invention, there is no loss of viewing angle when using the night vision system, and a clear night image is obtained with little degradation in detection performance. In particular, when used with a night vision goggle equipped with a magnifying glass, it can be used as a night vision for a long distance. In addition, the diopter can be aligned with the user's visual acuity so that the observer can obtain a sharp aim point.

FIG. 1 is a conceptual diagram of an optical part of a detachable dot site for a day / night sighting system according to a preferred embodiment of the present invention,
FIG. 2 is a detailed view of optical components of a detachable dot site for a day / night sighting system according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram of an optical part of a detachable dot site for a night vision system according to an embodiment of the present invention. The optical part includes a collimator lens system 100, a double reflex light part 200, a stop 250, And a lens system 300.

1 and 2, a collimator lens system 100 according to an embodiment of the present invention will be described. The collimator lens system 100 according to the present embodiment is formed of one lens group 20 and a mesh portion 10.

First, the lens group 20 is a typical collimator and may be configured as an image-forming lens or a condensing lens, and may be formed of a convex plane-convex lens, a double-let lens, or a separated double-layer lens on the object side And an aspherical lens may be used. This makes the image of the reticle pattern of the focal plane easy to transmit, and has a positive refractive power as a whole. The longer the focal length, the better the resolution of the mesh pattern.

In addition, the net portion 10 is constructed such that a mesh pattern is engraved on a planar glass or a thin plate of metal, plastic or the like, and a mesh pattern is formed on the thin plate to allow light emitted from the light source to pass therethrough. ) And LD (Laser Diode), or solar light can be used as an optical fiber, and a radioactive isotope emitter (H _3, tritium, etc.) can be used. The wavelength of the light source may be red, orange, or green, and a light source having a near-infrared wavelength may be used for night vision. Moving the assembly including the collimating lens system vertically and horizontally allows precise zeroing, which is effective for long-range shooting. At this time, the center of rotation of the collimator lens system is on the focal side, and the moving side is on the collimator lens side. The movement amount of the collimating lens system, the rotation angle and the rotation axis are multiplied by the magnification of the zoom lens system, which becomes the final movement amount observed by the user.

The double reflex mirror 200 is composed of two reflective surfaces M1 and M2. The reflex mirror 200 reflects the aim point image twice at 90 degrees, changes the direction thereof, and transmits it to the magnification lens system 300, thereby reducing the overall length of the optical system. The reflective surfaces M1 and M2 are formed by a dove prism or two opposing right angle prisms or plane mirrors 30 and 40 facing each other so as to be reflected in a direction of incidence of light, . ≪ / RTI >

Dove prism can be used easily because it can make two reflection surfaces with one body and it does not need to align, but it is disadvantageous in that the price is rather expensive.

In order to reduce the length of the optical system, it is best to make the incident direction and the emitting direction opposite to each other, but it is also possible that the incident direction and the emitting direction are not perpendicular to each other.

The reflection surface of the Dove prism or the right angle prism is totally free of coating because it uses total reflection. In the case of a flat-plate reflector, the light is reflected at 45 °, so the reflectance can be increased by a dielectric coating, and metal coatings such as aluminum, silver and gold are also available.

The magnification lens system 300 is composed of an objective lens group 50, a reflector 60 and a projection lens group 70, and is made of a refractive-refraction-type magnification reduction optics system so that the reticle pattern and the external image are overlapped in a large area It does.

The magnification lens system is constructed as one body and separated, and when the magnification lens system is detached from the main housing or mounted on the side of the body, the optical path of the night vision apparatus can be used without choosing. Therefore, when used as a night vision device in conjunction with a night vision device, a clear image can be obtained without loss of viewing angle and minimizing degradation of resolution and detection performance.

In addition, it can be used as a sight mirror in conjunction with any nonfocus optical system such as night vision system, daytime magnification system or the like without any aiming point.

At this time, the optical axis of the objective lens group 50 is parallel to the optical axis of the collimator lens group 20 and the optical axis of the projection lens group 70, and if the optical axis is configured in the same direction, the size of the system can be reduced. While the optical axis of the double reflex portion 200 is perpendicular to the optical axis. In addition, the size of the system is reduced by a reduction magnification lens system for showing the aim point at a large output beam.

The objective lens group 50 is made of a refractive element having a small aperture, which forms an incidence part of a magnification reduction optical system, which collects collimated light beams of a parallel light type. A typical collimator may consist of an imaging lens or a condensing lens in the form of a convex convex lens, a double-layer lens or a separated double-layer lens on the object side, or an aspherical lens may be used. Having a positive refracting power as a whole, the longer the focal length, the better the resolution of the reticle pattern.

The reflecting mirror 60 is positioned on the focal plane so that the aiming point image is redirected toward the projection lens group 70 from the reflecting plane M3. The reflecting mirror 60 moves back and forth so that the diopter of the aiming point can be adjusted to the visual acuity of the user. At this time, the moving distance per 1 diopter is reduced by half because it moves the reflector. A user with negative (-) diopters moves the reflector towards the object, and a user with positive (+) diopters moves the reflector in the viewing direction to match the diopter.

Curvatures of the projection lens group 70 should prevent distortion of the image of the subject and serve as an eyepiece. The larger the curvature and the more flat the better. The focal length should be selected appropriately in consideration of the system length. The projection lens group 70 converts an aim point image into an infinite ray and transmits it to an eye of an observer. At this time, the light rays from the subject are transmitted through the projection lens group 70 as they are, and are overlapped with the sight point image.

1 and 2, the projection lens group 70 is shown as a convex meniscus lens. The projection lens group 70 may be composed of a double-layered lens or a separated double-layered lens, and a parabolic surface aspherical lens may be used. In the case of the folded lenses, the performance of the projection lens can be improved by using flint glass and crown glass as a general achromatic lens. Aspheric lenses can be used to design a single sheet, and plastic aspheric surfaces can be used to lower costs.

The final lens surface of the projection lens group 70 is a reflection optical system that makes the image of the reticle pattern formed on the focal plane into parallel light so that an observer can easily observe it, and has a positive refracting power as a whole. A collimation point color can be coated on the reflector side M4 of the projection lens group 70 so as to be well reflected. When used for military purposes, it may be possible to use a narrow band reflective coating that matches the wavelength of the aiming point so that the position of the aiming point is visible on the object side. If the focal length is designed to be long or a low refractive index lens with a refractive index of 1.5 is used, the image distortion of the subject can be reduced.

At this time, the effective focal length F1 of the objective lens group 50 and the effective focal length F2 of the projection lens group 70 satisfy the following equation.

F1? F2,

F2 ² ? 2000 D

F1 / F2 = M? 1

(Where D represents the moving distance per 1 diopter of the reflector and M is the magnification of the magnification lens system).

A light guide or a stop 250 may be formed between the double reflex part 200 and the magnification lens system 300.

The focal length ratio of the objective lens group 50 and the projection lens group 70 determines the magnification of the magnification lens system and the magnification of the objective lens group 50 is determined by taking the path of the light beam into account, focal length. The objective lens may be used by cutting the upper portion so as not to block the aiming point light reflected by the reflecting mirror and going to the projection lens group 70.

10:
20: Lens group
30,40: Flat plate reflector
50: Objective lens group
60: reflector
70: projection lens group
100: collimator lens system
200: double reflex
250: aperture
300: Magnification lens system
M1, M2, M3, and M4:

Claims (8)

1. A detachable dot site for a night vision system, comprising:
A collimator lens system including collimator lens and collimator lens to collimate the collimation image;
A double reflex section including two reflection surfaces to change the direction of the aim point image and transmit it to the magnification lens system;
An objective lens group, and a refraction type refracting magnification lens system which is made up of a reflector and a projection lens group so as to make the reticle pattern observe as a wide exit pupil at a long eye distance,
Wherein each of the lens groups satisfies the following formula.
F1? F2,
F2 ² ? 2000 D
F1 / F2 = M? 1
(Where F1 is the effective focal length of the objective lens group, F2 is the effective focal length of the projection lens group, D is the moving distance per one diopter of the reflector, and M is the magnification of the magnification lens system)
The method according to claim 1,
Wherein the magnification lens system is a catadioptric nonfocus optical system and is formed of a refraction type objective lens group and a reflection type projection lens group.
The method according to claim 1,
Wherein the double reflector portion is made of a Dove prism or two flat prisms facing each other so that the two reflecting surfaces are perpendicular to each other or two flat plate reflectors facing each other so that the two reflecting surfaces are perpendicular to each other. Detachable dot site for sighting system.
The method according to claim 1,
And the optical axes of the objective lens group and the projection lens group of the magnification lens system are arranged in parallel to each other.
The method according to claim 1,
Wherein the reflecting mirror of the magnification lens system moves forward and backward in the optical axis direction to align the diopter of the observer with the aiming point.
The method according to claim 1,
Wherein the collimating lens system is moved vertically and horizontally to move the aiming point.
The method according to claim 1,
And a diaphragm is further provided between the double reflex light part and the magnification lens system.
The method according to claim 1,
Wherein the dot site is separated from a collimating lens system and a double reflex light part when used in conjunction with a night vision lens, and a separate dot site for a day / night sighting system.

Images