Adjustment mechanism of telephoto inverted image objective lens, magnification lens and sighting device

Abstract

The present invention provides an adjustment mechanism for a telephoto inverted image objective lens, comprising an integrated lens seat, the lens seat being provided with a lens mounting cavity for mounting an objective lens image transfer group, two ends of the lens seat being provided with a ball head rotating end for rotatably connecting with a lens body and an adjustment end for contacting and connecting with an adjustment device, respectively, and the ball head rotating end and the adjustment end being integrally connected. The adjustment mechanism assembles all lenses in the objective lens image transfer group into an integrated structure through the lens mounting cavity, and the ball head rotating end and the adjustment end of the adjustment mechanism for optical adjustment are also integrally connected structures, so that in the process of optical adjustment through the ball head rotating end and the adjustment end of the adjustment mechanism, each lens in the lens mounting cavity can maintain a relative position unchanged, so that the optical axis entering the objective lens image transfer group and the optical axis emitting from the objective lens image transfer group remain collinear, thereby ensuring that the imaging quality meets the observation or aiming requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of aiming devices, and in particular to an adjustment mechanism of a telephoto inverted image objective lens, a magnification lens and a sighting device. Background Art

[0002] Telephoto inverted image systems feature a short overall optical length, a simple structure, and excellent imaging quality. They are widely used in optical instruments for handheld light weapons (e.g., magnifying scopes, sights, etc.). For example, U.S. Patent No. US6870669B2 discloses a telephoto inverted image system comprising an objective lens image transfer assembly and an eyepiece assembly arranged sequentially from the object side to the image side, wherein the objective lens image transfer assembly comprises a first objective lens, a prism assembly, and a second objective lens arranged sequentially from the object side to the image side. After installation, the optical instrument requires optical adjustment for easier aiming. For example, for a magnifying scope, the center of the scope's field of view must roughly coincide with the aiming point of a spot sight used in combination with the scope; for a sight, the center of the sight's reticle must coincide with the point of impact.

[0003] At present, the commonly used optical adjustment method for telephoto inverted image systems is to keep the first objective lens stationary and only adjust the prism group and / or the second objective lens. For example, Chinese patent No. ZL201821715926.9 discloses a compact five-fold magnifier (in fact, the magnifier includes the above-mentioned telephoto inverted image system) and discloses its optical adjustment structure, that is, the ballistic adjustment assembly includes a longitudinal adjustment screw located at the top of the lens body and a lateral adjustment screw located at one side of the lens body, and both adjustment screws are in contact with the front end of the prism barrel. Therefore, rotating the above-mentioned two adjustment screws can make the prism barrel swing up, down, left, right, etc., thereby adjusting the position of the prism group and the additional lens installed in the prism barrel. However, since the primary image plane of the telephoto inverted image system is located after the additional lens (equivalent to the above-mentioned second objective lens), the combination of the objective lens assembly (equivalent to the above-mentioned first objective lens), the prism assembly and the additional lens is a complete imaging structure. No matter which component is adjusted, it will cause the optical axis to deviate, thereby deteriorating the image quality. In particular, when the longitudinal adjustment screw or the lateral adjustment screw is turned to the extreme position, the imaging quality parameters of the optical system (such as on-axis and off-axis spherical aberration, chromatic aberration, field curvature, distortion, etc.) will deteriorate by more than 5%, thus affecting the use of the teleconverter. Therefore, it is necessary to improve the optical adjustment method of the existing telephoto inverted image system. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an adjustment mechanism for a telephoto inverted image objective lens, which can reduce the degree of optical axis deviation of the objective lens imaging system during optical adjustment, so that the imaging quality of the optical instrument meets the observation or aiming requirements.

[0005] Correspondingly, another technical problem to be solved by the present invention is to provide a magnifying lens having an adjustment mechanism of the above-mentioned telephoto inverted objective lens, which can keep the optical axis within an allowable range during the optical adjustment process, so that the imaging quality meets the observation requirements.

[0006] Correspondingly, another technical problem to be solved by the present invention is to provide a sight having an adjustment mechanism for the above-mentioned telephoto inverted objective lens, which can keep the optical axis within an allowable range during the optical adjustment process, so that the imaging quality meets the aiming requirements.

[0007] As for the adjustment mechanism of a telephoto inverted image objective lens, the technical solution adopted by the present invention is: an adjustment mechanism of a telephoto inverted image objective lens, including an integrated lens seat, the lens seat is provided with a lens mounting cavity for installing an objective lens relay group, and the two ends of the lens seat are respectively provided with a ball head rotating end for rotatably connecting to the lens body and an adjustment end for contacting and connecting with the adjustment device, and the ball head rotating end and the adjustment end are integrally connected.

[0008] Compared with the prior art, the above-mentioned adjustment mechanism assembles all the lenses in the objective lens relay group into an integrated structure through an integrated lens mount, and the ball head rotating end and the adjustment end of the adjustment mechanism used for optical adjustment are also an integrally connected structure, so that during the process of optical adjustment through the ball head rotating end and the adjustment end, the relative positions of the lenses in the lens mounting cavity can remain unchanged, so that the optical axis entering the objective lens relay group and the optical axis emitting from the objective lens relay group remain collinear, thereby ensuring that the imaging quality meets the observation or aiming requirements.

[0009] Preferably, the lens mounting cavity comprises a first lens cavity, a first prism cavity and a second lens cavity, which are respectively used to mount the first objective lens, the first prism group and the second objective lens and are arranged in sequence along the central axis of the lens base.

[0010] Furthermore, the first lens cavity, the first prism cavity and the second lens cavity are arranged in sequence along the central axis of the lens holder from the ball head rotation end to the adjustment end.

[0011] Furthermore, the lens mounting cavity further includes a spare cavity for mounting optical accessories, and the spare cavity is located on the image side of the second lens cavity.

[0012] Furthermore, the first lens cavity, the first prism cavity, the second lens cavity and the spare cavity are arranged in sequence along the central axis of the lens holder from the ball head rotation end to the adjustment end.

[0013] Preferably, the first prism cavity includes a roof prism cavity and a half pentaprism cavity for installing a roof prism and a half pentaprism respectively, so that the optical axis emitted from the first objective lens passes through the roof prism and the half pentaprism in sequence and then coincides with the central axis of the second objective lens.

[0014] Furthermore, the first prism cavity is also provided with an aperture stop located between the roof prism cavity and the half pentaprism cavity, and the aperture stop is provided with a light-through hole, the center of which coincides with the optical axis between the half pentaprism and the roof prism, so as to increase the exit pupil distance of the optical system.

[0015] In another embodiment, the first prism cavity includes a half pentaprism cavity and a roof prism cavity for respectively mounting a half pentaprism and a roof prism, so that the optical axis emitted from the first objective lens coincides with the central axis of the second objective lens after passing through the half pentaprism and the roof prism in sequence.

[0016] Furthermore, the first prism cavity is also provided with an aperture stop plate located between the half pentaprism cavity and the roof prism cavity, and the aperture stop plate is provided with a light-through hole, the center of which coincides with the optical axis between the half pentaprism and the roof prism, so as to increase the exit pupil distance of the optical system.

[0017] Furthermore, the aperture stop piece and the lens holder are integrally formed.

[0018] In another embodiment, the aperture stop plate is fixedly connected to the lens holder.

[0019] In another embodiment, the lens mounting cavity includes a first lens cavity and a second prism cavity arranged in sequence along the central axis of the lens mount, the second prism cavity includes a roof prism cavity, a half pentagonal prism cavity and a second lens cavity for respectively mounting a roof prism, a half pentagonal prism and a second objective lens, and the second lens cavity is located between the roof prism cavity and the half pentagonal prism cavity, so that the incident light axis passes through the roof prism, the second objective lens and the half pentagonal prism in sequence and then exits parallel to the incident light axis.

[0020] Furthermore, the first lens cavity and the second prism cavity are arranged in sequence along the central axis of the lens holder from the ball head rotation end to the adjustment end.

[0021] Furthermore, the lens mounting cavity further includes a spare cavity for mounting optical accessories, and the spare cavity is located on the image side of the second prism cavity.

[0022] Furthermore, the first lens cavity, the second prism cavity and the spare cavity are arranged in sequence along the central axis of the lens holder from the ball head rotation end to the adjustment end.

[0023] Furthermore, the adjustment mechanism also includes a second objective lens mounting piece integrally formed with the lens holder, and the second objective lens mounting piece is located between the roof prism cavity and the half pentaprism cavity, and the second lens cavity is arranged in the second objective lens mounting piece.

[0024] In another embodiment, the adjustment mechanism further includes a second objective lens mounting member fixedly connected to the lens holder, and the second objective lens mounting member is located between the roof prism cavity and the half pentaprism cavity, and the second lens cavity is arranged in the second objective lens mounting member.

[0025] As for the magnifying glass, the technical solution adopted by the present invention is: a magnifying glass, comprising a lens body and an objective lens relay group and an eyepiece group installed inside the lens body and arranged in sequence from the object side to the image side along the central axis of the lens body, the lens body is provided with an adjustment device, the objective lens relay group is installed inside the lens body through the adjustment mechanism of any of the above-mentioned telephoto inverted objective lenses, the ball head rotating end of the adjustment mechanism is rotatably connected to the lens body, and the adjustment device is in contact with the adjustment end of the adjustment mechanism so as to make the adjustment end swing around the central axis of the ball head rotating end.

[0026] Compared with the prior art, when the adjustment mechanism is adjusted to the extreme position by the adjustment device (for example, the adjustment end is rotated clockwise or counterclockwise around the ball head rotation end by the adjustment device until it can no longer rotate), although there is some deviation between the output optical axis of the objective lens relay group and the incident optical axis of the eyepiece group, since the objective lens relay group is installed in the adjustment mechanism of the telephoto inverted objective lens, the relative positions of the various lenses of the objective lens relay group can be kept unchanged during the optical adjustment process, thereby ensuring that the imaging quality of the objective lens relay group will not deteriorate, and further making the imaging quality parameters of the magnification lens (such as on-axis and off-axis spherical aberration, chromatic aberration, field curvature, distortion and other parameters) deteriorate by less than 3%, which can still meet the use requirements of the optical instrument for observation.

[0027] Furthermore, the magnifying mirror also includes a field stop arranged inside the above-mentioned adjustment mechanism and located on the imaging surface of the above-mentioned objective lens relay group to block stray light at the edge of the field of view, so that the magnifying mirror obtains an image with clear boundaries.

[0028] Preferably, the field stop is installed in the spare cavity of the above-mentioned mirror holder.

[0029] In another embodiment, the field stop is mounted on the mirror reflection surface of the half pentaprism of the objective lens relay assembly.

[0030] As for the sight, the technical solution adopted by the present invention is: a sight, including a mirror body and an objective lens relay group, a graticule and an eyepiece group installed inside the mirror body and arranged in sequence from the object side to the image side along the central axis of the mirror body, the mirror body is provided with an adjustment device, the objective lens relay group and the graticule are installed inside the mirror body through the adjustment mechanism of any of the above-mentioned telephoto inverted objective lenses, the ball head rotating end of the adjustment mechanism is rotatably connected to the mirror body, the adjustment device is in contact with the adjustment end of the adjustment mechanism so that the adjustment end swings around the central axis of the ball head rotating end, and the graticule surface of the graticule coincides with the imaging surface of the above-mentioned objective lens relay group.

[0031] Compared with the prior art, when the adjustment mechanism is adjusted to the extreme position by the adjustment device (for example, the adjustment end is rotated clockwise or counterclockwise around the ball head rotation end by the adjustment device until it can no longer rotate), although the output optical axis of the objective lens relay group and the incident optical axis of the eyepiece group deviate from each other, because the objective lens relay group and the grating are installed in the adjustment mechanism of the telephoto inverted objective lens, and the grating surface of the grating coincides with the imaging surface of the objective lens relay group, the relative positions of the various lenses of the objective lens relay group can be maintained unchanged, thereby ensuring that the imaging quality of the objective lens relay group will not deteriorate, and further reducing the degree of deterioration of the imaging quality parameters of the sight (such as on-axis and off-axis spherical aberration, chromatic aberration, field curvature, distortion, etc.) to less than 3%, which can still meet the use requirements of the optical instrument for aiming.

[0032] Preferably, the dividing sheet is installed in the spare cavity of the above-mentioned mirror holder.

[0033] In another embodiment, the graticule is mounted on the mirror reflection surface of the half pentaprism of the objective lens relay assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0035] Figure 1 is an axonometric diagram of the adjustment mechanism of the first embodiment of the present invention;

[0036] Figure 2 yes Figure 1 AA section view;

[0037] Figure 3 1 is a schematic diagram of the assembly of the adjustment mechanism and the objective lens image relay assembly according to the first embodiment of the present invention;

[0038] Figure 4 is an axonometric view of the adjustment mechanism of the second embodiment of the present invention;

[0039] Figure 5 yes Figure 4 BB cross-sectional view;

[0040] Figure 6 1 is a schematic diagram of the assembly of the adjustment mechanism and the objective lens image relay assembly according to the second embodiment of the present invention;

[0041] Figure 7 is an axonometric view of the adjustment mechanism of the third embodiment of the present invention;

[0042] Figure 8 yes Figure 7 CC cross-sectional view;

[0043] Figure 9 1 is a schematic diagram of the assembly of the adjustment mechanism and the objective lens image relay assembly according to the third embodiment of the present invention;

[0044] Figure 10 is another assembly diagram of the adjustment mechanism and the objective lens relay group according to the third embodiment of the present invention;

[0045] Figure 11 is a cross-sectional view of the structure of a magnifying lens according to a fourth embodiment of the present invention;

[0046] Figure 12 is another structural cross-sectional view of the magnifying lens according to the fourth embodiment of the present invention;

[0047] Figure 13 is a cross-sectional view of the structure of a magnifying lens according to a fifth embodiment of the present invention;

[0048] Figure 14 is a cross-sectional view of the structure of a sight according to a sixth embodiment of the present invention;

[0049] Figure 15 is another structural cross-sectional view of the sight according to embodiment 6 of the present invention;

[0050] Figure 16 is another structural cross-sectional view of the sight according to the sixth embodiment of the present invention;

[0051] Figure 17 2 is a cross-sectional view of the structure of the sight according to the seventh embodiment of the present invention. DETAILED DESCRIPTION

[0052] It should be noted that the terms "first," "second," and similar terms used in this disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "upper," "lower," "left," "right," "front," "back," "top," and "bottom" used in this disclosure are intended solely to indicate relative positional relationships. If the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] As described in the background technology section, the existing telephoto inverted image system includes an objective lens image transfer group and an eyepiece group arranged in sequence from the object side to the image side, wherein the objective lens image transfer group includes a first objective lens, a prism group, and a second objective lens arranged in sequence from the object side to the image side. The commonly used optical adjustment method for the telephoto inverted image system is to keep the first objective lens stationary and only adjust the prism group and / or the second objective lens. Since the primary image plane of the telephoto inverted image system is located behind the second objective lens, the combination of the first objective lens, the prism group, and the second objective lens forms a complete imaging structure. No matter which component is adjusted, the optical axis will deviate, thereby deteriorating the image quality. In particular, when the longitudinal or lateral adjustment screw is rotated to the extreme position, the system's imaging quality parameters (such as on-axis and off-axis spherical aberration, chromatic aberration, field curvature, distortion, etc.) will deteriorate by more than 5%, thereby affecting the use of the optical instrument. Therefore, it is necessary to improve the optical adjustment method of the existing telephoto inverted image system.

[0054] In order to better describe the technical solution of the present invention, reference will be made to Figures 1 to 17 Seven embodiments of the adjustment mechanism of the telephoto inverted objective lens, the magnifying lens, and the sight are described. Figures 1 to 17 In the figure, the left side corresponds to the object space, and the right side corresponds to the image space. Figures 1 to 17 The same reference numerals are used to refer to the same or similar elements. Figures 1 to 17 In the figure, L1 represents the first objective lens, L2 represents the second objective lens, L3 represents the eyepiece assembly, P11 represents the roof prism, P12 represents the half pentaprism, S1 represents the imaging surface, and S2 represents the mirror reflection surface of the half pentaprism. It can be understood that the imaging surface S1 is the primary image surface.

[0055] Example 1

[0056] like Figure 1 As shown, this embodiment provides an adjustment mechanism for a telephoto inverted image objective lens, comprising an integrated lens mount 1 having a lens mounting cavity 2 for mounting an objective lens relay assembly. The lens mount 1 is provided with a ball-shaped rotating end 12 for rotatably connecting to a lens body 3 and an adjustment end 13 for contacting and connecting with an adjustment device 31 at each end. The ball-shaped rotating end 12 and the adjustment end 13 are integrally connected. It will be understood that the lens mount is optically adjusted by applying an external force to the adjustment end 13 via the adjustment device 31, causing the adjustment end 13 to rotate about the central axis of the ball-shaped rotating end 12, thereby driving the entire objective lens relay assembly mounted in the lens mounting cavity 2 to rotate, thereby achieving the purpose of optical adjustment.

[0057] Among them, Figures 2 and 3As shown, the lens mounting cavity 2 includes a first lens cavity 21, a first prism cavity 22, a second lens cavity 23, and a spare cavity 24, which are arranged in sequence along the central axis of the lens holder 1 and are respectively used to mount the first objective lens L1, the first prism group (including the roof prism P11 and the half pentaprism P12), the second objective lens L2, and optical accessories (such as the field stop 41, the dividing plate 6, etc.). It should be noted that the optical accessories are not necessary for the objective lens image relay group of the telephoto inverted image system, but corresponding optical accessories can be provided as needed. For example, for a magnifying lens, the field stop 41 can be omitted to obtain a larger field of view, or the field stop 41 can be provided to block stray light at the edge of the field of view so that the magnifying lens obtains a clear-cut image. For a sighting device, a dividing plate 6 with dividing lines can be provided to facilitate aiming and ranging, or the field stop 41 can be provided to block stray light at the edge of the field of view so that the sighting device obtains a clear-cut image. Therefore, the lens mounting cavity 2 can be provided with a spare cavity 24 as needed to install corresponding optical accessories.

[0058] Specifically, there are two arrangements of the first lens cavity 21, the first prism cavity 22, the second lens cavity 23, and the spare cavity 24 within the lens mount: In the first arrangement, the first lens cavity 21, the first prism cavity 22, the second lens cavity 23, and the spare cavity 24 are arranged in sequence along the central axis of the lens mount 1 from the ball head rotation end 12 to the adjustment end 13; in the second arrangement, the first lens cavity 21, the first prism cavity 22, the second lens cavity 23, and the spare cavity 24 are arranged in sequence along the central axis of the lens mount 1 from the adjustment end 13 to the ball head rotation end 12. Regardless of the arrangement, the relative positions of the lenses within the lens mounting cavity 2 remain unchanged during optical adjustment, thereby ensuring that the imaging quality meets the requirements of observation or aiming.

[0059] Usually the aperture of the first objective lens L1 of the telephoto inverted image system is larger than the aperture of the first prism group (for example Figure 3 The optical aperture of the first prism group shown is larger than that of the roof prism P11, and the adjustment end 13 needs space to move during the optical adjustment process. Therefore, in order to facilitate the structural design of the mirror body 3 connected to the ball head rotating end 12 to be simpler, the internal space of the mirror body 3 is fully utilized. Figure 2 As shown, in this embodiment, the first arrangement is preferably used as the arrangement of the first lens cavity 21, the first prism cavity 22, the second lens cavity 23 and the spare cavity 24 in the lens holder. The first objective lens L1 with a relatively large aperture is installed near the rotating end 12 of the ball head, and the first prism group with a relatively small aperture is installed near the adjusting end 13, so that the outer dimensions of the adjusting end 13 are smaller than the outer dimensions of the rotating end 12 of the ball head. Figure 11As shown, when the mirror base and the mirror body 3 are assembled, the ball head rotating end 12 is installed at the end of the mirror body 3, and the adjustment end 13 is toward the middle of the mirror body 3. Therefore, it is only necessary for the inner diameter of the mirror body 3 to meet the installation size requirements of the ball head rotating end 12 to meet the moving space required by the adjustment end 13. This not only simplifies the structural design of the mirror body 3, but also makes full use of the space inside the mirror body 3.

[0060] like Figures 2 and 3 As shown, the first prism cavity 22 includes a roof prism cavity 221 and a half pentaprism cavity 222 for mounting the roof prism P11 and the half pentaprism P12, respectively, so that the roof prism P11 and the half pentaprism P12 are combined into a Behan prism group, and the optical axis emitted from the first objective lens L1 passes through the roof prism P11 and the half pentaprism P12 in sequence and then coincides with the central axis of the second objective lens L2. It should be noted that the optical axis entering the roof prism P11 and the optical axis exiting the half pentaprism P12 can be collinear or not, as long as the optical axis exiting the half pentaprism P12 coincides with the central axis of the second objective lens L2, it will not affect the imaging quality of the optical system. Preferably, in this embodiment, the optical axis entering the roof prism P11 and the optical axis exiting the half pentaprism P12 are collinear.

[0061] like Figure 2 As shown, in this embodiment, in order to further increase the exit pupil distance of the optical system, the above-mentioned first prism cavity 22 is further provided with an aperture aperture plate 223 located between the roof prism cavity 221 and the half pentaprism cavity 222, and the aperture aperture plate 223 is provided with a light-through hole 224, the center of which roughly coincides with the optical axis between the roof prism P11 and the half pentaprism P12, so that the optical axis emitted from the first objective lens L1 passes through the roof prism P11, the light-through hole 224 of the aperture aperture plate 223 and the half pentaprism P12 in sequence and then coincides with the central axis of the second objective lens L2.

[0062] The aperture stop piece 223 can be integrally formed with the lens base 1, or the aperture stop piece 223 can be positioned in the first prism cavity 22 as a separate part, and then fixedly connected to the lens base 1 by adhesive or fasteners, so that the aperture stop piece 223 and the lens base 1 become one.

[0063] Compared with the prior art, the above-mentioned adjustment mechanism assembles all the lenses in the objective lens relay group into an integrated structure through the lens mounting cavity 2, and the ball head rotating end 12 and the adjustment end 13 of the adjustment mechanism used for optical adjustment are also an integrally connected structure, so that during the process of optical adjustment through the ball head rotating end 12 and the adjustment end 13 of the lens holder 1, the relative positions of the various lenses in the lens mounting cavity 2 can remain unchanged, so that the optical axis entering the objective lens relay group and the optical axis emitting from the objective lens relay group still remain roughly coincident, thereby ensuring that the imaging quality meets the observation or aiming requirements.

[0064] Example 2

[0065] like Figures 4 to 6 As shown, the difference from Example 1 is that the above-mentioned first prism cavity 22 includes a half pentaprism cavity 222 and a roof prism cavity 221 for respectively mounting a half pentaprism P12 and a roof prism P11, so that the half pentaprism P12 and the roof prism P11 are combined into a Bihan prism group, and the optical axis emitted from the first objective lens L1 passes through the half pentaprism P12 and the roof prism P11 in sequence and then coincides with the central axis of the second objective lens L2.

[0066] like Figures 5 and 6 As shown, in this embodiment, in order to further increase the exit pupil distance of the optical system, the above-mentioned first prism cavity 22 is further provided with an aperture aperture plate 223 located between the half pentaprism cavity 222 and the roof prism cavity 221, and the aperture aperture plate 223 is provided with a light-through hole 224, and the center of the light-through hole 224 roughly coincides with the optical axis between the roof prism P11 and the half pentaprism P12, so that the optical axis emitted from the first objective lens L1 passes through the half pentaprism P12, the light-through hole 224 of the aperture aperture plate 223 and the roof prism P11 in sequence and then coincides with the central axis of the second objective lens L2.

[0067] Example 3

[0068] like Figures 7 to 10 As shown, the difference from Example 1 is that the lens mounting cavity 2 includes a first lens cavity 21 and a second prism cavity 25 arranged in sequence along the central axis of the lens holder 1. The second prism cavity 25 includes a roof prism cavity 221, a half pentaprism cavity 222, and a second lens cavity 23 for mounting the roof prism P11, the half pentaprism P12, and the second objective lens L2, respectively. The second lens cavity 23 is located between the roof prism cavity 221 and the half pentaprism cavity 222, so that the optical axis emitted from the first objective lens L1 passes through the roof prism P11, the second objective lens L2, and the half pentaprism P12 in sequence and then exits parallel to the optical axis emitted from the first objective lens L1. It should be noted that, on the one hand, the roof prism P11 and the half pentaprism P12 installed in the second prism cavity 25 are combined to form a Behan prism group; on the other hand, the optical axis entering the roof prism P11 and the optical axis exiting the half pentaprism P12 can be collinear or non-collinear. Preferably, in this embodiment, the optical axis entering the roof prism P11 and the optical axis exiting the half pentaprism P12 are collinear.

[0069] Specifically, the adjustment mechanism further includes a second objective lens mounting member 5 for mounting the second objective lens L2. The second objective lens mounting member 5 is located between the roof prism cavity 221 and the half pentaprism cavity 222. The second lens cavity 23 is disposed within the second objective lens mounting member 5. The second objective lens mounting member 5 can be integrally formed with the lens holder 1. Alternatively, the second objective lens mounting member 5 can be a separate component that is first positioned between the roof prism cavity 221 and the half pentaprism cavity 222 and then fixedly connected to the lens holder 1 via adhesive or fasteners, thereby integrating the second objective lens mounting member 5 with the lens holder 1.

[0070] In this embodiment, if Figure 9 As shown, the imaging surface S1 of the objective lens relay group can be set on the mirror reflection surface S2 of the half pentaprism P12, and a dividing piece 6 or a dividing line is set on the mirror reflection surface S2 to meet the needs of aiming and ranging. Figure 8 As shown, the imaging surface S1 of the objective lens relay group can also be set on the image side of the second prism cavity 25. For this purpose, the lens mounting cavity 2 also includes a spare cavity 24 for mounting optical accessories. The spare cavity 24 is located on the image side of the second prism cavity 25, and the imaging surface S1 is set in the spare cavity 24. Figure 10 As shown, when the grating 6 is installed in the spare cavity 24, the needs of aiming and ranging can be met; Figure 9 As shown, when the field stop 41 is installed in the spare cavity 24, stray light at the edge of the field of view can be blocked, so that the optical instrument can obtain an image with clear boundaries.

[0071] Specifically, there are two arrangements of the first lens cavity 21, the second prism cavity 25, and the backup cavity 24 within the lens mount: In the first arrangement, the first lens cavity 21, the second prism cavity 25, and the backup cavity 24 are arranged sequentially along the central axis of the lens mount 1, from the ball head rotation end 12 to the adjustment end 13; in the second arrangement, the first lens cavity 21, the second prism cavity 25, and the backup cavity 24 are arranged sequentially along the central axis of the lens mount 1, from the adjustment end 13 to the ball head rotation end 12. Either arrangement ensures that the relative positions of the lenses within the lens mounting cavity 2 remain unchanged during optical adjustment, thereby preventing image quality from being affected.

[0072] Usually the first objective lens L1 of the telephoto inverted image system has a larger aperture than the prism group (e.g. Figure 9 The optical aperture of the prism group shown is larger than that of the roof prism P11, and the adjustment end 13 needs space to move during the optical adjustment process. Therefore, in order to facilitate the structural design of the mirror body 3 connected to the ball head rotating end 12, the internal space of the mirror body 3 is fully utilized. Figure 8As shown, in this embodiment, the first arrangement is preferably used as the arrangement of the first lens cavity 21 and the second prism cavity 25 in the lens holder. The first objective lens L1 with a relatively large aperture is installed near the rotating end 12 of the ball head, and the prism group with a relatively small aperture is installed near the adjusting end 13, so that the outer dimensions of the adjusting end 13 are smaller than the outer dimensions of the rotating end 12 of the ball head. Figure 13 As shown, when the mirror base and the mirror body 3 are assembled, the ball head rotating end 12 is installed at the end of the mirror body 3, and the adjustment end 13 is toward the middle of the mirror body 3. Therefore, it is only necessary for the inner diameter of the mirror body 3 to meet the installation size requirements of the ball head rotating end 12 to meet the moving space required by the adjustment end 13. This not only simplifies the structural design of the mirror body 3, but also makes full use of the space inside the mirror body 3.

[0073] Example 4

[0074] like Figures 11 and 12 As shown (the longitudinal adjustment screw 31a in the figure is not cut away), this embodiment provides a magnification mirror, including a mirror body 3 and an objective lens rotation group and an eyepiece group L3 installed inside the mirror body 3 and arranged in sequence from the object side to the image side along the central axis of the mirror body 3. The mirror body 3 is provided with an adjustment device 31, which includes a longitudinal adjustment screw 31a and a transverse adjustment screw 31b. The objective lens rotation group is installed inside the mirror body 3 through the adjustment mechanism of the telephoto inverted objective lens disclosed in Example 1 or 2. The mirror body 3 is provided with a ball and socket structure 32, and the ball head rotating end 12 of the adjustment mechanism is rotatably connected to the ball and socket structure 32 of the mirror body 3. The adjustment device 31 is in contact with the adjustment end 13 of the adjustment mechanism so that the adjustment end 13 swings around the central axis of the ball head rotating end 12.

[0075] Compared with the prior art, when the adjustment mechanism is adjusted to the extreme position by the adjustment device 31 (for example, the adjustment end 13 is rotated clockwise or counterclockwise around the ball head rotating end 12 by the longitudinal adjustment screw 31a or the transverse adjustment screw 31b until it can no longer rotate), although there is some deviation between the output optical axis of the objective lens relay group and the incident optical axis of the eyepiece group L3, since the objective lens relay group is installed in the adjustment mechanism of the telephoto inverted objective lens, the relative positions of the various lenses of the objective lens relay group can be kept unchanged during the optical adjustment process, thereby ensuring that the imaging quality of the objective lens relay group will not deteriorate, and further making the imaging quality parameters of the magnification lens (such as on-axis and off-axis spherical aberration, chromatic aberration, field curvature, distortion and other parameters) deteriorate by less than 3%, which can still meet the use requirements of the optical instrument for observation.

[0076] like Figure 11 or Figure 12As shown, in order to facilitate obtaining a clear-edge image through the extender, in this embodiment, the extender further includes a field stop 41 disposed within the adjustment mechanism and located on the imaging surface S1 of the objective lens relay assembly to block stray light at the edge of the field of view, allowing the extender to obtain a clear-edge image.

[0077] Preferably, the field stop 41 is installed in the spare cavity 24 of the lens holder.

[0078] Example 5

[0079] like Figure 13 As shown, the difference from Example 4 is that the objective lens relay group is installed inside the lens body 3 through the adjustment mechanism of the telephoto inverted objective lens disclosed in Example 3, the field stop 41 is installed on the mirror reflection surface S2 of the half pentaprism P12 of the above-mentioned objective lens relay group, and the imaging surface S1 of the objective lens relay group is also located on the mirror reflection surface S2 of the half pentaprism P12.

[0080] Example 6

[0081] like Figures 14 and 15 As shown, this embodiment further provides a sighting device, comprising a lens body 3 and an objective lens relay group, a dividing plate 6 and an eyepiece group L3 installed inside the lens body 3 and arranged in sequence from the object side to the image side along the central axis of the lens body 3. The lens body 3 is provided with an adjusting device 31. The objective lens relay group and the dividing plate 6 are installed inside the lens body 3 through the adjusting mechanism of the telephoto inverted objective lens disclosed in Example 1 or 2, wherein the dividing plate 6 is installed in the spare cavity 24. The lens body 3 is provided with a ball and socket structure 32. The ball head rotating end 12 of the adjusting mechanism is rotatably connected to the ball and socket structure 32 of the lens body 3. The adjusting device 31 is in contact with the adjusting end 13 of the adjusting mechanism so that the adjusting end 13 swings around the central axis of the ball head rotating end 12, and the dividing surface of the dividing plate 6 coincides with the imaging surface S1 of the objective lens relay group.

[0082] Compared with the prior art, when the adjustment mechanism is adjusted to the extreme position by the adjustment device 31 (for example, the adjustment end 13 is rotated clockwise or counterclockwise around the ball head rotating end 12 by the longitudinal adjustment screw 31a or the transverse adjustment screw 31b until it can no longer rotate), although the output optical axis of the objective lens relay group and the incident optical axis of the eyepiece group L3 deviate from each other, since the objective lens relay group and the dividing plate 6 are installed in the adjustment mechanism of the telephoto inverted objective lens, and the dividing surface of the dividing plate 6 coincides with the imaging surface S1 of the objective lens relay group, the relative positions of the various lenses of the objective lens relay group can be maintained unchanged during the optical adjustment process, thereby ensuring that the imaging quality of the objective lens relay group will not deteriorate, and further making the imaging quality parameters of the sight (such as on-axis and off-axis spherical aberration, chromatic aberration, field curvature, distortion, etc.) deteriorate by less than 3%, which can still meet the use requirements of the optical instrument for aiming.

[0083] Preferably, the dividing blade 6 is installed in the spare cavity 24 of the mirror holder.

[0084] Example 7

[0085] like Figures 16 and 17 As shown, the difference from the sixth embodiment is that the objective lens image relay group is installed inside the lens body 3 through the adjustment mechanism of the telephoto inverted objective lens disclosed in the third embodiment.

[0086] In this embodiment, if Figure 17 As shown, the imaging surface S1 of the objective lens relay assembly can be disposed on the mirrored reflective surface S2 of the semi-pentaprism P12. A graticule 6 or graticule lines can be provided on this mirrored reflective surface S2 to meet the needs of aiming and ranging. Furthermore, to block stray light at the edge of the field of view and enable the optical instrument to obtain a sharp image, a spare cavity 24 for mounting optical accessories can be provided within the lens mounting cavity 2. This spare cavity 24 is located on the image side of the second prism cavity 25. When a field stop 41 is installed in the spare cavity 24, stray light at the edge of the field of view can be blocked, allowing the optical instrument to obtain a sharp image.

[0087] like Figure 16 As shown, the imaging surface S1 of the objective lens relay group can also be set on the image side of the second prism cavity 25, which can meet the needs of aiming and ranging when the dividing piece 6 is installed in the spare cavity 24.

[0088] The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments. As long as the technical effects of the present invention are achieved by any same or similar means, they should fall within the scope of protection of the present invention.

Claims

1. An adjustment mechanism for a telephoto inverted image objective lens, characterized in that: The invention comprises an integrated lens seat (1), wherein the lens seat (1) is provided with a lens mounting cavity (2) for mounting an objective lens relay group, wherein the objective lens relay group comprises a first objective lens (L1), a first prism group, and a second objective lens (L2), and wherein two ends of the lens seat (1) are respectively provided with a ball head rotating end (12) for being rotatably connected to a lens body (3) and an adjusting end (13) for being in contact with an adjusting device (31), wherein the ball head rotating end (12) and the adjusting end (13) are integrally connected.

2. The adjustment mechanism of the telephoto inverted image objective lens according to claim 1, characterized in that: The lens mounting cavity (2) comprises a first lens cavity (21), a first prism cavity (22) and a second lens cavity (23) which are respectively used to mount a first objective lens (L1), a first prism group and a second objective lens (L2) and are arranged in sequence along the central axis of the lens seat (1).

3. The adjustment mechanism of the telephoto inverted image objective lens according to claim 2, characterized in that: The lens mounting cavity (2) further comprises a spare cavity (24) for mounting optical accessories, wherein the spare cavity (24) is located on the image side of the second lens cavity (23).

4. The adjustment mechanism of the telephoto inverted image objective lens according to claim 3, characterized in that: The first lens cavity (21), the first prism cavity (22), the second lens cavity (23) and the spare cavity (24) are arranged in sequence along the central axis of the lens holder (1) from the ball head rotation end (12) to the adjustment end (13).

5. The adjustment mechanism of the telephoto inverted image objective lens according to claim 2, characterized in that: The first prism cavity (22) comprises a roof prism cavity (221) and a half pentaprism cavity (222) for mounting a roof prism (P11) and a half pentaprism (P12) respectively, so that the optical axis emitted from the first objective lens (L1) passes through the roof prism (P11) and the half pentaprism (P12) in sequence and then coincides with the central axis of the second objective lens (L2).

6. The adjustment mechanism of the telephoto inverted image objective lens according to claim 2, characterized in that: The first prism cavity (22) comprises a half pentagonal prism cavity (222) and a roof prism cavity (221) for mounting a half pentagonal prism (P12) and a roof prism (P11) respectively, so that the optical axis emitted from the first objective lens (L1) passes through the half pentagonal prism (P12) and the roof prism (P11) in sequence and then coincides with the central axis of the second objective lens (L2).

7. The adjustment mechanism of a telephoto inverted image objective lens according to any one of claims 5 or 6, characterized in that: The first prism cavity (22) is provided with an aperture stop plate (223) located between the roof prism cavity (221) and the half-penta prism cavity (222); the aperture stop plate (223) is provided with a light-through hole (224); the center of the light-through hole (224) coincides with the optical axis between the half-penta prism (P12) and the roof prism (P11).

8. The adjustment mechanism of the telephoto inverted image objective lens according to claim 7, characterized in that: The aperture stop piece (223) and the mirror base (1) are integrally formed.

9. The adjustment mechanism of the telephoto inverted image objective lens according to claim 7, characterized in that: The aperture stop piece (223) is fixedly connected to the lens seat (1).

10. The adjustment mechanism of the telephoto inverted image objective lens according to claim 1, characterized in that: The lens mounting cavity (2) comprises a first lens cavity (21) and a second prism cavity (25) which are sequentially arranged along the central axis of the lens seat (1); the second prism cavity (25) comprises a roof prism cavity (221), a half pentagonal prism cavity (222) and a second lens cavity (23) which are respectively used to mount a roof prism (P11), a half pentagonal prism (P12) and a second objective lens (L2); the second lens cavity (23) is located between the roof prism cavity (221) and the half pentagonal prism cavity (222), so that an incident light axis sequentially passes through the roof prism (P11), the second objective lens (L2) and the half pentagonal prism (P12) and then exits in parallel with the incident light axis.

11. The adjustment mechanism of the telephoto inverted image objective lens according to claim 10, characterized in that: The adjustment mechanism further comprises a second objective lens mounting member (5) formed integrally with the lens holder (1), and the second objective lens mounting member (5) is located between the roof prism cavity (221) and the semi-pentaprism cavity (222), and the second lens cavity (23) is arranged on the second objective lens mounting member (5).

12. The adjustment mechanism of the telephoto inverted image objective lens according to claim 10, characterized in that: The adjustment mechanism further comprises a second objective lens mounting member (5) fixedly connected to the lens holder (1), and the second objective lens mounting member (5) is located between the roof prism cavity (221) and the semi-pentaprism cavity (222), and the second lens cavity (23) is arranged on the second objective lens mounting member (5).

13. The adjustment mechanism of the telephoto inverted image objective lens according to claim 10, characterized in that: The first lens cavity (21) and the second prism cavity (25) are arranged in sequence along the central axis of the lens holder (1) from the ball head rotation end (12) to the adjustment end (13).

14. A magnification mirror, characterized in that: The invention comprises a lens body (3), an objective lens image relay group and an eyepiece lens group (L3) which are installed inside the lens body (3) and are arranged in sequence from the object side to the image side along the central axis of the lens body (3); the lens body (3) is provided with an adjustment device (31); the objective lens image relay group is installed inside the lens body (3) through an adjustment mechanism of a telephoto inverted objective lens as claimed in any one of claims 1 to 13; the ball head rotating end (12) of the adjustment mechanism is rotatably connected to the lens body (3); the adjustment device (31) is in contact with the adjustment end (13) of the adjustment mechanism so that the adjustment end (13) swings around the central axis of the ball head rotating end (12).

15. A magnifying mirror according to claim 14, characterized in that: The magnifying mirror further comprises a field diaphragm (41) which is arranged inside the adjusting mechanism and located on the imaging surface of the objective lens image relay group, so that the magnifying mirror can obtain an image with clear boundaries.

16. A sight, characterized in that: The invention comprises a lens body (3), an objective lens image relay group, a grating plate (6) and an eyepiece group (L3) which are installed inside the lens body (3) and arranged in sequence from the object side to the image side along the central axis of the lens body (3), the lens body (3) being provided with an adjusting device (31), the objective lens image relay group and the grating plate (6) being installed inside the lens body (3) by means of an adjusting mechanism for a telephoto inverted image lens as claimed in any one of claims 1 to 13, the ball head rotating end (12) of the adjusting mechanism being rotatably connected to the lens body (3), the adjusting device (31) being contact-connected to the adjusting end (13) of the adjusting mechanism so that the adjusting end (13) swings around the central axis of the ball head rotating end (12), and the grating surface of the grating plate (6) coincides with the imaging surface of the objective lens image relay group.

Images