A dual field of view riflescope

Abstract

The embodiment of the present application relates to a kind of dual view field sighting telescope, including adjustable focus objective group, turning mirror group and eyepiece group in order from object side to image side along the direction of optical axis;Adjustable focus objective group includes first cemented lens, first lens, second lens and differentiation board;Turning mirror group includes light splitting prism, first turning mirror group and second turning mirror group;Eyepiece group includes fourth lens, fifth lens and third cemented lens.The present application is fused by the cooperation of light splitting prism, first turning mirror group and second turning mirror group of turning mirror group, and large magnification field of view and small magnification field of view can be realized simultaneously, which is convenient for users to simultaneously perform rough aiming and accurate aiming to improve the rapid response of shooter aiming and shooting on target.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sighting scopes, in particular to a dual field of view sighting scope. BACKGROUND

[0002] The main function of optical sight is to use optical lens imaging to overlap the target image and the aiming line on the same focusing plane, so that even if the eyes are slightly offset, the aiming point will not be affected. Optical sighting scopes are widely used in gun shooting because they can be observed and locked at a long distance. The optical sighting scopes of the traditional technology are usually fixedly connected with the gun, and when the gun equipped with the optical sighting scope is used, only a single field of view can be displayed, and the large magnification field of view and the small magnification field of view cannot be displayed at the same time. Therefore, the large field of view and the small field of view need to be frequently switched during use, which causes inconvenience in use. SUMMARY

[0003] The purpose of the present application is to overcome the defects of the prior art, and provide a dual field of view sighting scope. The large magnification field of view and the small magnification field of view are fused by the cooperation of the light splitting prism, the first turning mirror group and the second turning mirror group, the large magnification field of view and the small magnification field of view can be displayed at the same time, the user can conveniently perform rough aiming and accurate aiming at the same time, and the rapid response of the shooter to target aiming and shooting is improved.

[0004] Therefore, the present application provides a dual field of view sighting scope, which comprises an adjustable focusing objective lens group, a turning mirror group and an ocular lens group arranged in sequence along the optical axis direction from the object side to the image side; the light beam emitted from the object side can pass through the adjustable focusing objective lens group, the turning mirror group and the ocular lens group in sequence; wherein,

[0005] The adjustable focusing objective lens group comprises a first cemented lens, a first lens with positive refractive power, a second lens with negative refractive power and a differentiation plate arranged in sequence along the optical axis direction from the object side to the image side, wherein one surface of the differentiation plate has a scale line, the surface is coincident with the image plane of the adjustable focusing objective lens group and is called the first image plane;

[0006] The turning mirror group comprises a light splitting prism, a first turning mirror group and a second turning mirror group; wherein the first turning mirror group comprises a first lens group and a second lens group; the second turning mirror group comprises a third lens with positive refractive power, a first reflecting mirror, a third lens group, a second cemented lens, a second reflecting mirror and a third reflecting mirror; after the light beam of the objective lens group enters the light splitting prism, the light beam is divided into a large field of view light path in the horizontal direction and a small field of view light path in the vertical direction, the large field of view light path is imaged on the second image plane through the first lens group and the second lens group; the small field of view light path is collimated through the third lens, then the light beam is adjusted to be in the horizontal direction through the first reflecting mirror, and then the light beam is adjusted to be in the vertical direction after passing through the third lens group, the second cemented lens and the second reflecting mirror, and finally the small field of view light beam is focused and imaged on a local area on the second image plane through the third reflecting mirror;

[0007] The eyepiece group comprises, in order from the object side to the image side along the optical axis, a fourth lens with negative focal power, a fifth lens with positive focal power, and a third cemented lens.

[0008] Preferably, the first cemented lens is formed by cementing a positive lens and a negative lens.

[0009] Preferably, the first lens group comprises a fourth cemented lens formed by cementing a negative lens and a positive lens, and a sixth lens with positive focal power.

[0010] The second lens group comprises a fifth cemented lens formed by cementing a positive lens and a negative lens.

[0011] Preferably, the third lens group comprises a sixth cemented lens formed by cementing a negative lens and a positive lens, and a seventh lens with positive focal power.

[0012] The second cemented lens is formed by cementing a positive lens with positive focal power and a negative lens with negative focal power.

[0013] Preferably, the third cemented lens is formed by cementing a negative lens and a positive lens.

[0014] Preferably, the second lens is a movable lens that can move along the optical axis, so as to adjust the imaging of the object surface at different aiming distances to the differentiation plate.

[0015] Preferably, the adjustable objective lens group further comprises an eighth lens with positive focal power, which is arranged between the second lens and the differentiation plate, or arranged between the differentiation plate and the turning mirror group, for adjusting the angle of the chief ray of the off-axis field of view incident to the turning mirror group, and reducing the volume of the turning mirror group in the large field of view.

[0016] Preferably, the light splitting prism is formed by cementing two right-angled triangular prisms, and one of the prisms is provided with a light splitting film.

[0017] Preferably, the angle between the first reflecting mirror and the horizontal direction is 45°, the angle between the second reflecting mirror and the horizontal direction is 135°, and the angle between the third reflecting mirror and the horizontal direction is 135°.

[0018] Preferably, the third reflecting mirror is located between the second lens group and the eyepiece group.

[0019] The dual field of view sighting scope provided by the embodiment of the application can fuse the large magnification field of view and the small magnification field of view through the cooperation of the turning mirror group, the light splitting prism, the first turning mirror group, and the second turning mirror group, so that the large magnification field of view and the small magnification field of view can be displayed at the same time, which facilitates the user to simultaneously perform rough aiming and accurate aiming and improves the rapid response of the shooter to target aiming and shooting. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 An optical system diagram of a dual field of view scope provided by an embodiment of the present application;

[0021] Figure 2 An optical system diagram of a focusing adjustable objective group provided by an embodiment of the present application;

[0022] Figure 3 An optical system diagram of a relay objective group provided by an embodiment of the present application;

[0023] Figure 4 An optical system diagram of a large field of view relay optical system provided by an embodiment of the present application;

[0024] Figure 5 An optical system diagram of a small field of view relay optical system provided by an embodiment of the present application;

[0025] Figure 6 An optical system diagram of an eyepiece group provided by an embodiment of the present application;

[0026] Figure 7 A simulation display picture of a scope observation provided by an embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solutions of the present application are described in further detail below by means of the drawings and embodiments.

[0028] Figure 1 An optical system diagram of a dual field of view scope provided by an embodiment of the present application, as shown in Figure 1 The dual field of view scope includes, in order from the object side to the image side along the optical axis direction, a focusing adjustable objective group 1, a relay mirror group 2 and an eyepiece group 3, and the light beam emitted from the object side can pass through the focusing adjustable objective group 1, the relay mirror group 2 and the eyepiece group 3 in order, and the structure and working process of the focusing adjustable objective group 1, the relay mirror group 2 and the eyepiece group 3 are introduced below.

[0029] The focusing adjustable objective group 1, Figure 2 An optical system diagram of a focusing adjustable objective group 1 provided by an embodiment of the present application, as shown in Figure 2As shown, the focus-adjustable objective lens group 1 specifically comprises, sequentially arranged along the optical axis direction from the object side to the image side, a first cemented lens 11, a first lens 12 with positive refractive power, a second lens 13 with negative refractive power, and a reticle 14. In a preferred embodiment, the first cemented lens 11 is formed by cementing a positive lens and a negative lens, the surface of the first lens 12 towards the object side is a convex surface, and the second lens 13 is a double-concave lens. One surface of the reticle 14 has scale lines, and this surface coincides with the image plane of the focus-adjustable objective lens group, and is referred to as the first image plane. It should be noted that the second lens 13 is a movable lens, which can move along the optical axis direction, so as to accurately adjust the imaging of the object plane at different aiming distances to the reticle 14, thereby eliminating the influence of parallax, and the reticle is located on the image plane of the entire objective lens group 1.

[0030] In a preferred embodiment, in order to improve the vignetting condition of the entire system, the focus-adjustable objective lens group 1 further comprises an eighth lens 15 with positive refractive power, which is arranged near the reticle 14, between the second lens 13 and the reticle 14, or between the reticle 14 and the turning mirror group 2, i.e. can be arranged to the right or left of the first image plane, for adjusting the angle of the chief ray of the off-axis field of view incident to the turning mirror group 2, reducing the volume of the turning mirror group of the large-angle field of view in the subsequent process, thereby improving the vignetting condition of the entire system.

[0031] The turning mirror group 2 is used to generate two different magnification fields of view, which are 3 times and 8 times in this embodiment. Figure 3 An optical system diagram of the turning mirror objective lens group 1 provided in the embodiment of the present application is shown in FIG. 2. Figure 3 As shown, the turning mirror group 2 specifically comprises a light splitting prism 21, a first turning mirror group 22, and a second turning mirror group 23. The first turning mirror group 22 comprises a first lens group and a second lens group, and the second turning mirror group 23 comprises a third lens 231 with positive refractive power, a first mirror 232, a third lens group 233, a second cemented lens 234, a second mirror 235, and a third mirror 236. The imaging process of the turning mirror group 2 is as follows: after the light beam of the objective lens group 1 enters the light splitting prism 21, it is split into a large field of view light path in the horizontal direction and a small field of view light path in the vertical direction. The large field of view light path passes through the first lens group and the second lens group to be imaged on the second image plane. The small field of view light path is collimated by the third lens 231, and then the light beam is adjusted to be in the horizontal direction by the first mirror 232. After passing through the third lens group 233, the second cemented lens 234, and the second mirror 235, the light beam is adjusted to be in the vertical direction, and then focused and imaged on a partial area of the second image plane by the third mirror 236, preferably on a partial area in the lower half of the second image plane. Thus, the effect of the fusion of the two fields of view is obtained. The structure and working process of each component of the turning mirror group 2 will be described in detail below.

[0032] The light splitting prism 21 is preferably made of two right-angled triangular prisms, one of which is coated with a light splitting film on its inclined surface to split the light path into horizontal and vertical light paths, the horizontal light path being the light path for the large field of view and the vertical light path being the light path for the small field of view. It should be noted that the light splitting ratio of the light splitting film can be adjusted by those skilled in the art as required to make the field of view brightness ratio of the large field of view and the small field of view more appropriate. The light path passing through the prism forms the large field of view light path, and the light path reflected by the prism forms the small field of view light path.

[0033] In combination Figure 3 and Figure 4 As shown in FIGS. 1, 2 and 3, the first turning mirror group 22 is used for imaging the large field of view turning light path and specifically includes a first lens group and a second lens group. In a preferred embodiment, the first lens group can include a fourth cemented lens 221 made of a negative lens and a positive lens and a sixth lens 222 with positive optical power, and the second lens group can include a fifth cemented lens 223 made of a positive lens and a negative lens. The large field of view turning light path imaging process is as follows: the incident pupil is imaged on the intermediate position of the first lens group and the second lens group through the objective lens group 1 and the first lens group, forming a relatively symmetrical optical configuration, which is beneficial for correcting the axial symmetry aberration. Since the pupil image is at the central position of the two lens groups, the height of the off-axis light rays of the two lens groups is not high, which is beneficial for reducing the diameter of the lens and in turn effectively reducing the volume of the light path. Then the fifth cemented lens 223 focuses the light beam on the second image plane.

[0034] In combination Figure 3 and Figure 5As shown, the second turning mirror group 23 here is used for small field of view turning light path imaging, and specifically includes a third lens 231 with positive focal power, a first mirror 232, a third lens group 233, a second cemented lens 234, a second mirror 235, and a third mirror 236. In a preferred embodiment, the second turning mirror group 23 is composed of 6 lenses and 3 mirrors, the third lens group 233 preferably includes a sixth cemented lens 2331 composed of a negative lens and a positive lens cemented together, and a seventh lens 2332 with positive focal power; the second cemented lens 234 is preferably composed of a positive lens and a negative lens cemented together; and the third mirror 236 is preferably located between the second lens group and the ocular group 3, that is, the third mirror 236 is arranged in the large field of view light path. Further preferably, the angle between the first mirror 232 and the horizontal direction is preferably 45°, the angle between the second mirror 235 and the horizontal direction is preferably 135°, and the angle between the third mirror 236 and the horizontal direction is preferably 135°. It can be understood that the straight lines on which the first mirror 232 and the second mirror 235 are located are perpendicular to each other, and the straight lines on which the second mirror 235 and the third mirror 236 are located are parallel to each other. Those skilled in the art can set the angles of the mirrors as needed. The small field of view turning light path imaging process is as follows: starting from the light splitting prism 21, the large field of view and the small field of view light paths are separated, and next to the light splitting prism 21 is a third lens 231 with positive focal power. The function of this single lens is to collimate the light beam of the objective lens to the small field of view, thereby effectively reducing the subsequent mirror group aperture and reducing the diameter of the subsequent lenses. After collimation by the first single lens, the light beam enters the first 45° first mirror 232, which adjusts the vertical light beam reflected by the light splitting prism 21 to a horizontal state. After passing through the first mirror 232, the light beam passes through the third lens group 233 composed of the sixth cemented lens composed of a negative lens and a positive lens cemented together and the seventh lens with positive focal power. After passing through the third lens group 233, the light beam passes through the second cemented lens 234, which is a double cemented lens. Then, the light beam passes through the 45° second mirror 235 to adjust the light path from horizontal to vertical. Finally, the light beam passes through the 45° third mirror 236 to focus the small field of view light beam to a partial area in the lower half of the second image plane, thereby obtaining the effect of the fusion of the two fields of view. It should be noted that the reflection center of the last 45° third mirror 236 is located in the light path of the large field of view, so that part of the field of view of the large field of view is shielded by the mirror, and the shielded field of view is used for the small field of view light path, forming the observation effect after fusion.

[0035] The ocular group 3 is composed of four lenses, and the lens closest to the first image plane in the ocular group needs to be a certain distance away from the first image plane in order to achieve a certain amount of diopter adjustment. Figure 6 An optical system diagram of the ocular group 3 provided by the embodiment of the present application is shown inFigure 6 As shown, the eyepiece group 3 specifically comprises, arranged in order from the object side to the image side along the optical axis direction, a fourth lens 31 with a negative focal power, a fifth lens 32 with a positive focal power, and a third cemented lens 33; the third cemented lens 33 is preferably formed by cementing a negative lens and a positive lens. Figure 7 A simulation display picture of the scope observation provided by the embodiment of the present application is shown in Fig. 2. Figure 7 As shown, the large field of view and the small field of view are simultaneously displayed.

[0036] In the embodiment, Table 1, Table 2, Table 3 and Table 4 respectively give the specific parameter values of each lens in the adjustable focus objective lens, the large field of view relay objective lens, the small field of view relay objective lens and the eyepiece, wherein, the "surface serial number" is the serial number of each surface arranged in order from the object side to the image side, and the "R value" is the corresponding spherical radius of each spherical surface.

[0037] Table 1 is the lens parameter of the adjustable focus objective lens

[0038] Surface No. Surface Type R Value Thickness Refractive Index Abbe Number Sur 1 Standard 58.352 7.4 1.497 81.6054 Sur 2 Standard -83.722 2 1.90366 31.315 Sur 3 Standard Infinity 53.42 Sur 4 Standard 51.485 5 1.799519 42.2533 Sur 5 Standard Infinity 30.41 Sur 6 Standard -41.803 1.5 1.84666 23.7845 Sur 7 Standard 178.889 4.286 Sur 8 Standard Infinity 2 1.5168 64.1673 Sur 9 Standard Infinity 17.587 Sur 10 Standard Infinity 1 Sur 11 Standard 41.143 2 1.84666 23.7845 Sur 12 Standard -41.143 15

[0039] Table 2 is the lens parameter of the large field of view relay objective lens

[0040] Surface No. Surface Type R Value Thickness Refractive Index Abbe Number Sur 1 Standard 134.138 2 1.84666 23.7845 Sur 2 Standard 21.574 4 1.90069 37.0505 Sur 3 Standard -75.711 1 Sur 4 Standard 22.286 2 1.755 52.3221 Sur 5 Standard 54.145 6 Sur 6 Standard Infinity 10 Sur 7 Standard 324.167 5 1.497 81.6054 Sur 8 Standard -9.457 2 1.90069 37.0505 Sur 9 Standard -15.919 31.593

[0041] Table 3 is the lens parameter of the small field of view relay objective lens

[0042] Surface No. Surface Type R Value Thickness Refractive Index Abbe Number Sur 1 Standard 50 2 1.84666 23.7845 Sur 2 Standard -50 21 Sur 3 Standard -9.896 2 1.84666 23.7845 Sur 4 Standard 38.564 4 1.90069 37.0505 Sur 5 Standard -15.621 1 Sur 6 Standard 36.334 3 1.755 52.3221 Sur 7 Standard -78.063 16 Sur 8 Standard 12.638 5 1.497 81.6054 Sur 9 Standard 12.307 2 1.90069 37.0505 Sur 10 Standard 6.658 51.397

[0043] Table 4 is the lens parameter of the eyepiece

[0044] Surface No. Surface Type R Value Thickness Refractive Index Abbe Number Sur 1 Standard Infinity 1.2 1.69894 30.0505 Sur 2 Standard 48.04 8.773 Sur 3 Standard -350.971 6.44 1.755 52.3221 Sur 4 Standard -33.292 23.48 Sur 5 Standard 355.771 1.5 1.76182 26.608 Sur 6 Standard 48.973 8.48 1.5928 68.342 Sur 7 Standard Sur 8 Standard Sur 9 Standard -41.115 70

[0045] The dual field of view scope provided by the embodiment of the present application can fuse the large magnification field of view and the small magnification field of view through the cooperation of the turning mirror group light splitting prism, the first turning mirror group and the second turning mirror group, can realize the simultaneous display of the large magnification field of view and the small magnification field of view, and facilitates the user to simultaneously perform rough aiming and accurate aiming to improve the rapid response of the shooter to the target aiming and shooting.

[0046] In the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The terms "mount", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, "connected" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the description of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the application.

[0048] In the description in the present specification, the description of the terms "one specific embodiment", "some embodiments", "one embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expression of the above terms does not necessarily mean the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0049] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A dual-field-of-view sight, characterized in that, It includes an adjustable objective lens group, a steering mirror group, and an eyepiece group arranged sequentially from the object side to the image side along the optical axis; the light beam emitted from the object side can pass through the adjustable objective lens group, the steering mirror group, and the eyepiece group in sequence; wherein, The adjustable focusing objective lens group includes a first cemented lens, a first lens with positive optical power, a second lens with negative optical power, and a dividing plate arranged sequentially from the object side to the image side along the optical axis. The dividing plate has a scale line on one surface, which coincides with the image plane of the adjustable focusing objective lens group and is called the first image plane. The steering mirror assembly includes a beam splitter, a first steering mirror group, and a second steering mirror group. The first steering mirror group includes a first lens group and a second lens group. The second steering mirror group includes a third lens with positive optical power, a first reflecting mirror, a third lens group, a second cemented lens, a second reflecting mirror, and a third reflecting mirror. The light beam passing through the objective lens group enters the beam splitter and is split into a large field-of-view path in the horizontal direction and a small field-of-view path in the vertical direction. The large field-of-view path is imaged onto a second image plane by the first and second lens groups. The small field-of-view path is collimated by the third lens, then adjusted to a horizontal direction by the first reflecting mirror, adjusted to a vertical direction by the third lens group, the second cemented lens, and the second reflecting mirror, and finally focused onto a local area of ​​the second image plane by the third reflecting mirror. The eyepiece group includes a fourth lens with negative optical power, a fifth lens with positive optical power, and a third cemented lens arranged sequentially from the object side to the image side along the optical axis.

2. The dual-field-of-view sight according to claim 1, characterized in that, The first cemented lens is made by cementing a positive lens and a negative lens together.

3. The dual-field-of-view sight according to claim 1, characterized in that, The first lens group includes a fourth cemented lens formed by cementing a negative lens and a positive lens, and a sixth lens with positive optical power; The second lens group includes a fifth cemented lens, which is formed by cementing together a positive lens and a negative lens.

4. The dual-field-of-view sight according to claim 1, characterized in that, The third lens group includes a sixth cemented lens, which is formed by cementing a negative lens and a positive lens, and a seventh lens with positive optical power; The second cemented lens is made by cementing a lens with positive optical power and a lens with negative optical power together.

5. The dual-field-of-view sight according to claim 1, characterized in that, The third cemented lens is formed by cementing a negative lens and a positive lens together.

6. The dual-field-of-view sight according to claim 1, characterized in that, The second lens is a movable lens that can move along the optical axis, thereby adjusting the image of the object at different aiming distances onto the refraction plate.

7. The dual-field-of-view sight according to claim 1, characterized in that, The adjustable objective lens group also includes an eighth lens with positive optical power, which is disposed between the second lens and the dividing plate, or between the dividing plate and the steering mirror group, to adjust the angle at which the principal ray of the off-axis field of view is incident on the steering mirror group, thereby reducing the volume of the steering mirror group in the subsequent large field of view optical path.

8. The dual-field-of-view sight according to claim 1, characterized in that, The beam splitter is made of two right-angled triangular prisms glued together, with a beam splitting film on one of the prisms.

9. The dual-field-of-view sight according to claim 1, characterized in that, The first reflector makes an angle of 45° with the horizontal direction, the second reflector makes an angle of 135° with the horizontal direction, and the third reflector makes an angle of 135° with the horizontal direction.

10. The dual-field-of-view sight according to claim 1, characterized in that, The third reflecting mirror is located between the second lens group and the eyepiece group.

Images