Six-ratio white light sighting telescope and optical system thereof

Abstract

The utility model discloses a six-time-ratio white light sighting telescope and an optical system thereof. The optical system comprises a first objective lens, a cemented objective lens, a first field lens, a reticle, a second field lens, a first relay lens, a second relay lens, a third field lens, a cemented eyepiece and a third eyepiece lens which are sequentially arranged from the object side to the image side. Wherein the first image rotation lens and the second image rotation lens have the same structure and are arranged in a mirror symmetry manner.

Description

Technical Field

[0001] The utility model relates to the technical field of aiming sights, and particularly relates to a six-fold white light aiming sight and its optical system. Background Art

[0002] At present, in order to improve the shooting accuracy of firearms, optical aiming sights are generally installed on them. The large magnification white light aiming sight has a wide range of uses. It can be used to search for targets at a small magnification and a large field of view, and to magnify and observe targets at a large magnification and a small field of view. Therefore, there is a large demand for large magnification aiming sights in the market. However, the current large magnification white light aiming sights generally have problems such as poor image quality, complex structure, and low stability, and it is difficult to withstand the impact brought by the equipped guns. At the same time, most white light aiming sights do not pay attention to the ergonomic design, which also brings many inconveniences to users. Content of the Utility Model

[0003] The purpose of the utility model is to provide a six-fold white light aiming sight and its optical system to achieve the high efficiency and stability of the white light aiming sight.

[0004] To solve the above technical problems, the utility model provides a technical solution: an optical system of a six-fold white light aiming sight, including an objective first lens, a cemented objective lens, a first field lens, a reticle, a second field lens, a first image relay lens and a second image relay lens, a third field lens, a cemented eyepiece, and an eyepiece third lens, which are arranged in sequence from the object side to the image side; wherein the first image relay lens and the second image relay lens have the same structure and are arranged symmetrically with respect to the mirror image.

[0005] According to the above scheme, the objective first lens is a first plano-convex lens, the cemented objective lens is composed of a first biconvex lens and a first biconcave lens cemented together, the first field lens is a first meniscus lens, the second field lens is a second plano-convex lens, the first image relay lens is composed of a second meniscus lens and a second biconvex lens cemented together, the second image relay lens is composed of a third biconvex lens and a third meniscus lens cemented together, the third field lens is a fourth meniscus lens, the cemented eyepiece is composed of a second biconcave lens and a fourth biconvex lens cemented together, and the eyepiece third lens is a fifth biconvex lens.

[0006] According to the above scheme, the objective first lens and the cemented lens constitute an objective optical system, the cemented eyepiece and the eyepiece third lens constitute an eyepiece optical system, and the focal length of the objective optical system and the focal length of the eyepiece optical system satisfy .

[0007] According to the above scheme, the air gap between the first lens of the objective lens and the cemented objective lens ranges from 1.1 mm to 1.2 mm, the air gap between the cemented objective lens and the first field lens ranges from 30 mm to 40 mm, the air gap between the first field lens and the reticle ranges from 5 mm to 10 mm, and the air gap between the reticle and the second field lens ranges from 5 mm to 10 mm; the image-side focal plane of the objective lens optical system is the first image plane, the object-side focal plane of the eyepiece optical system is the second image plane, the interval between the first image plane and the second image plane ranges from 100 mm to 110 mm, the air gap between the third field lens and the second image plane ranges from 1 mm to 5 mm, the air gap between the cemented eyepiece and the second image plane ranges from 10 mm to 15 mm, and the air gap between the third lens of the eyepiece and the cemented eyepiece ranges from 1 mm to 5 mm.

[0008] According to the above scheme,

[0009] The radius of curvature of the side of the first lens of the objective lens close to the object side ranges from 40 mm to 50 mm, and the side close to the cemented lens is a plane;

[0010] The radius of curvature of the side of the cemented objective lens close to the first lens of the objective lens ranges from 40 mm to 50 mm, the radius of curvature of the cemented surface ranges from -50 mm to -60 mm, and the radius of curvature of the side close to the first field lens ranges from 80 mm to 90 mm;

[0011] The radius of curvature of the side of the first field lens close to the cemented lens ranges from 20 mm to 30 mm, and the radius of curvature of the side close to the reticle ranges from 100 mm to 110 mm;

[0012] The side of the second field lens close to the reticle is a plane, and the radius of curvature of the side close to the relay lens ranges from -20 mm to -30 mm;

[0013] The radius of curvature of the side of the first relay lens close to the second field lens ranges from 30 mm to 40 mm, the radius of curvature of the cemented surface ranges from 10 mm to 20 mm, and the radius of curvature of the side close to the image side ranges from -40 mm to -50 mm;

[0014] The radius of curvature of the side of the second relay lens close to the first relay lens ranges from 40 mm to 50 mm, the radius of curvature of the cemented surface ranges from -10 mm to -20 mm, and the radius of curvature of the side close to the image side ranges from -30 mm to -40 mm;

[0015] The radius of curvature of the side of the third field lens close to the relay lens ranges from -20 mm to -30 mm, and the radius of curvature of the side close to the eyepiece ranges from -100 mm to -140 mm;

[0016] The curvature radius of the side of the glued eyepiece close to the third field lens ranges from -20mm to -30mm, the curvature radius of the glued surface ranges from 30mm to 40mm, and the curvature radius of the side close to the third lens of the eyepiece ranges from -10mm to -20mm;

[0017] The curvature radius of the side of the third lens of the eyepiece close to the glued eyepiece ranges from 80mm to 90mm, and the curvature radius of the side close to the image side ranges from -30mm to -40mm.

[0018] A six-fold ratio white light sight adopting the optical system described above comprises a scope tube, wherein an objective lens group, a first field lens group, a graticule group, a zoom image transfer group and an eyepiece group are sequentially arranged inside the scope tube from the object side to the image side; a zoom handwheel group connected to the zoom image transfer group in transmission and an adjustment screw group for adjusting the trajectory and windage are arranged outside the scope tube; the objective lens group comprises the first objective lens and a cemented lens, the first field lens group comprises the first field lens, the graticule group comprises the graticule plate, the zoom image transfer group comprises the second field lens, the first image transfer lens, the second image transfer lens and the third field lens, and the eyepiece group comprises the cemented eyepiece and the eyepiece third lens.

[0019] According to the above scheme, the graticule group is provided with a light-emitting diode for lighting the graticule lines on the graticule plate; and a switch lighting group for turning on and off the light-emitting diode and adjusting the brightness of the light-emitting diode is also provided outside the mirror tube.

[0020] According to the above scheme, the zoom image conversion group and the graticule group are coaxially arranged adjacent to each other along the optical axis direction, a graticule joint is sleeved on the outer side of the adjacent ends of the graticule group and the zoom image conversion group, the graticule joint and the graticule group are connected by a first thread, and the graticule joint and the zoom image conversion group are connected by a second thread, the first thread and the second thread have the same direction but different pitches; a plurality of set screws are arranged on the threaded surfaces of the first thread and the second thread along the circumferential direction;

[0021] The zoom image conversion group includes an image conversion lens tube and a zoom tube. The zoom tube is sleeved on the outside of the image conversion lens tube, and both ends of the image conversion lens tube extend from the inside of the zoom tube. The end of the image conversion lens tube close to the image side is a ball head, and the outer diameter of the ball head is larger than the outer diameter of the zoom tube. A zoom gasket sleeved on the outside of the image conversion lens tube is provided between the ball head and the zoom tube. The end of the image conversion lens tube close to the object side is connected to a front joint for fixing the axial position of the zoom tube.

[0022] A second field lens is fixed at one end of the relay lens tube near the object side, a third field lens is fixed at the spherical head at one end of the relay lens tube near the image side, and a linear groove is provided on the side wall of the relay lens tube; a first curved zoom groove and a second curved zoom groove are provided on the side wall of the zoom tube, and a first relay lens and a second relay lens are arranged inside the relay lens tube. Both the first relay lens and the second relay lens are fixed by a relay lens frame located inside the relay lens tube. A first sliding sleeve screw is fixed on the side wall of the relay lens frame for fixing the first relay lens, and a second sliding sleeve screw is fixed on the side wall of the relay lens frame for fixing the second relay lens. The outer ends of the first sliding sleeve screw and the second sliding sleeve screw are respectively sleeved with a first guide sleeve and a second guide sleeve, and the first guide sleeve and the second guide sleeve pass through the linear groove and are respectively located in the first curved zoom groove and the second curved zoom groove;

[0023] A step groove for placing the second field lens is provided on the inner wall of the relay lens tube near the object side end. The second field lens is located in the step groove and fixed by a second field lens retaining ring. The outer wall of the second field lens retaining ring is fixedly connected to the inner wall of the front joint;

[0024] A third field lens frame is fixed in the spherical head at one end of the relay lens tube near the image side. The third field lens is arranged in the third field lens frame and fixed by a third field lens retaining ring; a diaphragm fixed to the relay lens tube is arranged adjacent to one end of the third field lens frame near the image side.

[0025] According to the above solution, the spherical head of the relay lens tube is fixed in the lens tube through a front washer, an elastic washer and a spherical head retaining ring. A slotted hole is also provided on the side wall of the spherical head of the relay lens tube. The inner end of a limit screw is located in the slotted hole, and the outer end of the limit screw is fixed to the lens tube;

[0026] The zoom handwheel group includes a zoom handwheel and a zoom screw. A zoom handwheel is sleeved on the outer side of the end of the lens tube near the image side. One end of the zoom handwheel contacts the lens tube, and the other end contacts the eyepiece barrel. The eyepiece barrel is the part of the eyepiece group fixed to the end of the lens tube near the image side. Third sealing rings and second sealing rings are respectively arranged at the contact surfaces between the zoom handwheel and the lens tube and the eyepiece barrel; the inner side of the zoom screw is a smooth rod part, and the outer side is a threaded part. The smooth rod part of the zoom screw passes through a zoom opening groove and is located in a limit groove. The zoom opening groove is provided on the side wall of the lens tube, and the limit groove is provided on the side wall of the zoom tube.

[0027] According to the above solution, the switch lighting group includes a switch base. The bottom of the switch base is of a ring structure. A plastic washer is provided below the ring structure at the bottom of the switch base. A washer, a brush plate and a limit ring are sequentially arranged above the ring structure at the bottom of the switch base. The plastic washer, the brush plate and the limit ring are fixed to the lens tube by a plurality of connecting screws. The washer is in fit connection with the ring structure at the bottom of the switch base, and the washer and the switch base are kept radially fixed;

[0028] In the middle of the inner side of the switch base, there is a stepped surface. A slot is opened on the stepped surface. A wiring board is arranged on the stepped surface. There is a notch at the edge of the wiring board. An upper limit ring is arranged on the wiring board. A plug rod is arranged downward on the upper limit ring. The plug rod of the upper limit ring passes through the notch at the edge of the wiring board and is located in the slot on the stepped surface of the switch base; An upper limit ring is arranged above the wiring board. A wiring board pressure ring is connected to the inner wall of the switch base to axially fix the upper limit ring, the wiring board and the switch base; A battery is arranged in the wiring board pressure ring. The bottom of the battery is the negative electrode and contacts the contact on the top of the wiring board. The side of the battery is the positive electrode and contacts the wiring board pressure ring. A battery cover threadedly connected to the switch base is arranged above the battery. A battery guide brush with elasticity and used to press the battery is fixed at the bottom of the battery cover through a retaining ring;

[0029] On the top surface of the brush board, a pair of brush pieces are fixed. One end of one of the brush pieces contacts and is electrically connected to the central area at the bottom of the wiring board, and the other end is electrically connected to the negative electrode of the light-emitting diode. The central area at the bottom of the wiring board is electrically connected to the negative electrode at the bottom of the battery through the contact on the top of the wiring board; One end of the other brush piece contacts and is electrically connected to the edge area at the bottom of the wiring board, and is sequentially connected to the positive electrode on the side of the battery through the edge of the wiring board, the upper limit ring, and the wiring board pressure ring, and the other end is electrically connected to the positive electrode of the light-emitting diode; The edge area at the bottom of the wiring board is divided into several non-connected edge sub-areas, and different edge sub-areas are connected to the central area at the bottom of the wiring board with resistors of different resistance values.

[0030] The beneficial effects of the present utility model are:

[0031] 1. The first relay lens and the second relay lens, which serve as the variable magnification group and the compensating group, are mirror-symmetrical, not only saving costs, bringing convenience to design, processing, and assembly alignment, but also being very beneficial to the aberration correction, including the automatic compensation of the lateral aberration, and the axial aberration of the two groups can be corrected separately.

[0032] The optical variable magnification structure with "positive-positive" optical power makes the overall structure of the sight more compact, and smooth variable magnification can be achieved at different magnifications, ensuring excellent image quality.

[0033] The structure of the front-mounted reticle enables the reticle plane to change with the change of magnification during the variable magnification process, reducing the variable magnification error.

[0034] There is enough space between the glass reticle and the front and rear lens groups for subsequent parallax adjustment during assembly.

[0035] This optical system ensures that the image quality at both high and low magnifications meets the requirements of human eye observation and aiming. At the same time, the high-magnification chromatic aberration is not obvious, and it can be used normally during the variable magnification process from high magnification to low magnification, and the system aberration correction is good. Description of the Drawings

[0036] Figure 1It is a schematic structural diagram of the optical system of the six - fold white - light aiming sight in the first embodiment of the present utility model;

[0037] Figure 2 It is the spot diagram of the equivalent eyepiece of the optical system of the six - fold white - light aiming sight in the first embodiment of the present utility model at 1x magnification;

[0038] Figure 3 It is the spot diagram of the equivalent eyepiece of the optical system of the six - fold white - light aiming sight in the first embodiment of the present utility model at 6x magnification;

[0039] Figure 4 It is the spot diagram of the objective lens of the optical system of the six - fold white - light aiming sight in the first embodiment of the present utility model;

[0040] Figure 5 It is the first - perspective cross - sectional view of the six - fold white - light aiming sight in the second embodiment of the present utility model;

[0041] Figure 6 It is the second - perspective cross - sectional view of the six - fold white - light aiming sight in the second embodiment of the present utility model;

[0042] Figure 7 It is the cross - sectional view of the variable - magnification image - rotating group in the second embodiment of the present utility model;

[0043] Figure 8 It is the exploded assembly drawing of the switch lighting group in the second embodiment of the present utility model;

[0044] Figure 9 It is the first - perspective cross - sectional view of the switch lighting group in the second embodiment of the present utility model;

[0045] Figure 10 It is the second - perspective cross - sectional view of the switch lighting group in the second embodiment of the present utility model;

[0046] Figure 11 It is the cross - sectional view of the variable - magnification handwheel group in the second embodiment of the present utility model;

[0047] Figure 12 It is the axonometric drawing of the switch base in the second embodiment of the present utility model;

[0048] Figure 13 It is the unfolded drawing of the variable - magnification tube in the second embodiment of the present utility model.

[0049] In the figure: 1 - objective lens group, 2 - first field lens group, 3 - zoom relay group, 4 - eyepiece group, 5 - adjusting screw group, 6 - switch illumination group, 7 - zoom handwheel group, 101 - first objective lens, 102 - cemented objective lens, 201 - first field lens, 301 - reticle, 302 - second field lens, 3031 - first relay lens, 3032 - second relay lens, 304 - third field lens, 401 - cemented eyepiece, 402 - third eyepiece lens, 305 - reticle adapter, 306 - reticle retaining ring, 307 - reticle frame, 308 - second field lens retaining ring, 309 - front adapter, 310 - relay lens frame, 311 - relay lens retaining ring, 312 - zoom tube, 3121 - first curved zoom groove, 3122 - second curved zoom groove, 3123 - limit groove, 313 - relay lens tube, 314 - third field lens frame, 315 - third field lens retaining ring, 316 - diaphragm, 317 - zoom washer, 318 - slide screw, 319 - guide sleeve, 601 - battery cover, 602 - first sealing ring, 603 - battery conducting brush, 604 - retaining ring, 605 - battery, 606 - terminal board retaining ring, 607 - upper limit ring, 608 - terminal board, 609 - connecting screw, 610 - limit ring, 611 - brush board, 612 - washer, 613 - switch base, 614 - plastic washer, 701 - lens tube, 702 - zoom handwheel, 703 - zoom screw, 704 - eyepiece barrel, 705 - ball head retaining ring, 706 - elastic washer, 707 - front washer, 708 - limit screw, 709 - second sealing ring, 710 - third sealing ring. Detailed implementation mode

[0050] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0051] Embodiment 1:

[0052] Refer to Figure 1 , an optical system of a six - fold white - light aiming sight, including a first objective lens 101, a cemented objective lens 102, a first field lens 201, a reticle (a glass reticle is used in this embodiment), a second field lens 302, a first relay lens 3031 and a second relay lens 3031, a third field lens 301, a cemented eyepiece 401, and a third eyepiece lens 402, which are sequentially arranged from the object side to the image side; wherein the first relay lens 3031 and the second relay lens 3032 have the same structure and are arranged in mirror symmetry.

[0053] Further, the first objective lens 101 is a first plano-convex lens, the cemented objective lens 102 is formed by cementing a first biconvex lens and a first biconcave lens, the first field lens 201 is a first meniscus lens, the second field lens 302 is a second plano-convex lens, the first relay lens 3031 is formed by cementing a second meniscus lens and a second biconvex lens, the second relay lens 3032 is formed by cementing a third biconvex lens and a third meniscus lens, the third field lens 304 is a fourth meniscus lens, the cemented eyepiece 401 is formed by cementing a second biconcave lens and a fourth biconvex lens, and the third eyepiece lens 402 is a fifth biconvex lens.

[0054] Further, the first objective lens 101 and the cemented lens 102 constitute the objective optical system, the cemented eyepiece 401 and the third eyepiece lens 402 constitute the eyepiece optical system, and the focal length of the objective optical system and the focal length of the eyepiece optical system

[0055] meet

[0056] Further, the air gap between the first objective lens 101 and the cemented objective lens 102 is 1.116 mm, the air gap between the cemented objective lens 102 and the first field lens 201 is 38.313 mm, the air gap between the first field lens 201 and the reticle 301 is 8.586 mm, and the air gap between the reticle 301 and the second field lens 302 is 9 mm; the image-side focal plane of the objective optical system is the first image plane, the object-side focal plane of the eyepiece optical system is the second image plane, the distance between the first image plane and the second image plane is 101 mm, the air gap between the third field lens 304 and the second image plane is 1.93 mm, the air gap between the cemented eyepiece 401 and the second image plane is 14.4 mm, and the air gap between the third eyepiece lens 402 and the cemented eyepiece 401 is 2.976 mm.

[0056] Further, the curvature radius of the object-side surface of the first lens of the objective lens is 43.59 mm, and the surface close to the cemented lens is a plane; the curvature radius of the surface of the cemented objective lens close to the first lens of the objective lens is 45 mm, the curvature radius of the cemented surface is -51.752 mm, and the curvature radius of the surface close to the first field lens is 88.72 mm; the curvature radius of the surface of the first field lens close to the cemented lens is 20.32 mm, and the curvature radius of the surface close to the reticle is 102.7 mm; the surface of the second field lens close to the reticle is a plane, and the curvature radius of the surface close to the relay lens is -25 mm; the curvature radius of the surface of the first relay lens close to the second field lens is 30.974 mm, the curvature radius of the cemented surface is 11.024 mm, and the curvature radius of the image-side surface is -42.94 mm; the curvature radius of the surface of the second relay lens close to the first relay lens is 42.94 mm, the curvature radius of the cemented surface is -11.024 mm, and the curvature radius of the image-side surface is -30.974 mm; the curvature radius of the surface of the third field lens close to the relay lens is -20.05 mm, and the curvature radius of the surface close to the eyepiece is -133.09 mm; the curvature radius of the surface of the cemented eyepiece close to the third field lens is -20.94 mm, the curvature radius of the cemented surface is 31.33 mm, and the curvature radius of the surface close to the third lens of the eyepiece is -17.91 mm; the curvature radius of the surface of the third lens of the eyepiece close to the cemented eyepiece is 87.843 mm, and the curvature radius of the image-side surface is -34.51 mm.

[0057] Further, when the sight is zoomed, the first relay lens 3031 (zoom group) needs to move axially along the optical axis, thereby changing the combined focal length of the optical system. At this time, the image of the zoom group also moves accordingly. In order to maintain the fixed image plane of the optical system, it is necessary to make the second relay lens 3032 (compensation group) move according to the movement of the first relay lens 3031 (zoom group), so as to achieve compensation, so that the image point of the zoom group is still in the original position after passing through the compensation group. The moving distance of the compensation group and the moving distance of the zoom group have a non-linear correspondence relationship. The light passes through the zoom group and the compensation group in the zoom relay group 3 and forms an image on the second image plane, and then exits as parallel light through the eyepiece group 4 and forms an image on the retina; thus, the variable air interval between the second field lens 302 and the first relay lens 3031 (zoom group) is 1.31~31.875 mm, the variable air interval between the first relay lens 3031 (zoom group) and the second relay lens 3032 (compensation group) is 3.794~15.397 mm, and the variable air interval between the second relay lens 3032 (compensation group) and the third field lens 304 is 64.125 - 14.998 mm.

[0058] Further, the reticle side of the reticle 301 is the reticle surface, the reticle surface coincides with the first image plane, and reticle lines are provided on the reticle surface.

[0059] The performance of this optical system is shown inFigures 2 to 4 .

[0060] Embodiment 2:

[0061] See also Figure 5 , Figure 6 A six-fold ratio white light sight adopting the optical system described above comprises a lens tube 701, wherein an objective lens group 1, a first field lens group 2, a graticule group, a zoom image transfer group 3, and an eyepiece group 4 are sequentially arranged in the lens tube 701 from the object side to the image side; a zoom hand wheel group 7 which is transmission-connected with the zoom image transfer group 3, and an adjusting screw group 5 for adjusting the trajectory and windage are arranged outside the lens tube 701; the objective lens group 1 comprises the objective lens first lens 101 and a cemented lens 102, the first field lens group comprises the first field lens 201, the graticule group comprises the graticule plate 301, the zoom image transfer group 3 comprises the second field lens 302, the first image transfer lens 3031, the second image transfer lens 302, and the third field lens 304, and the eyepiece group 4 comprises the cemented eyepiece 401 and the eyepiece third lens 402;

[0062] Among them, the objective lens group 1 images the distant object on the first image plane, and the effective aperture of the first lens 101 of the objective lens is the aperture stop; the graticule plate 301 is a flat glass with graticule lines, and the image plane and the graticule plane coincide with each other after the target is imaged by the objective lens, so that the human eye can see the target image and the graticule plane at the same time through the equivalent eyepiece composed of the eyepiece group 4 and the zoom image transfer group 3; the second field lens 302 is a lens with positive focal length, which is used to converge light and improve the imaging quality; the image transfer lens adopts two groups of double cemented lenses with completely symmetrical structures, namely the first image transfer lens 3031 and the second image transfer lens 3032; The first image-transmitting lens 3031 and the second image-transmitting lens 3032 are formed by gluing a lens with negative optical power and a lens with positive optical power, and can invert the image formed by the first image plane into an upright image formed on the second image plane, and the magnification of the system can be changed by adjusting the distance between the first image-transmitting lens 3031 and the second image-transmitting lens 3032; the eyepiece optical system includes a glued eyepiece 401 formed by gluing a lens with negative optical power and a lens with positive optical power, and an eyepiece third lens 402, and the eyepiece group 4 magnifies the second image plane and forms an image at a distance of the human eye for observation.

[0063] Furthermore, the graticule group is provided with a light-emitting diode for lighting the graticule lines on the graticule plate; the lens tube 701 is also provided with a switch lighting group 6 for turning on and off the light-emitting diode and adjusting the brightness of the light-emitting diode. The graticule group includes a graticule plate 301, a graticule plate frame 307, and a graticule plate pressing ring 306. The graticule plate 301 is arranged in the graticule plate frame 307 and is tightened and fixed by the graticule plate pressing ring 306. The graticule plate frame 307 is provided with a circular hole for installing the light-emitting diode. The graticule plate frame 307 is provided with a wrench groove for manual assembly with a wrench. When adjusting the parallax, the graticule group is manually fixed by the wrench so that the graticule plate 301 does not rotate.

[0064] Further, referring to Figure 7 and Figure 13 , the variable magnification relay group 3 and the reticle group are coaxially and adjacently arranged along the optical axis direction. A reticle adapter 305 is sleeved outside the adjacent ends of the reticle group and the variable magnification relay group 3. The reticle adapter 305 is connected to the reticle group by a first thread (the pitch in this embodiment is 0.75 mm), and the reticle adapter 305 is connected to the variable magnification relay group 3 by a second thread (the pitch in this embodiment is 0.5 mm). The first thread and the second thread have the same direction but different pitches; eight set screws (for fixing after parallax correction) are arranged along the circumferential direction of the screwing surfaces of the first thread and the second thread;

[0065] The variable magnification relay group 3 includes a relay lens tube 313 and a variable magnification tube 312. The variable magnification tube 312 is sleeved outside the relay lens tube 313, and both ends of the relay lens tube 313 extend out of the variable magnification tube 312. One end of the relay lens tube 313 close to the image side is a spherical head, and the outer diameter of the spherical head is larger than the outer diameter of the variable magnification tube 312. A variable magnification washer 317 sleeved on the relay lens tube 313 is arranged between the spherical head and the variable magnification tube 312. A front adapter 309 for fixing the axial position of the variable magnification tube 312 is connected to one end of the relay lens tube 313 close to the object side;

[0066] A second field lens 302 is fixed to one end of the relay lens tube 313 close to the object side, a third field lens 304 is fixed to the spherical head at one end of the relay lens tube 313 close to the image side, and a linear groove is arranged on the side wall of the relay lens tube 313; a first curved variable magnification groove 3121 and a second curved variable magnification groove 3122 are arranged on the side wall of the variable magnification tube 312. A first relay lens 3031 and a second relay lens 3032 are arranged inside the relay lens tube 313. The first relay lens 3031 and the second relay lens 3032 are both fixed by a relay lens frame 310 inside the relay lens tube 313. The relay lens retaining ring 312 fixes the first relay lens 3031 and the second relay lens 3032 in the relay lens frame 310 by screwing with the relay lens frame 310. A first sliding sleeve screw is fixed to the side wall of the relay lens frame 310 for fixing the first relay lens 3031, and a second sliding sleeve screw is fixed to the side wall of the relay lens frame 310 for fixing the second relay lens 3032. The outer ends of the first sliding sleeve screw and the second sliding sleeve screw are respectively sleeved with a first guide sleeve and a second guide sleeve. The first guide sleeve and the second guide sleeve pass through the linear groove and are respectively located in the first curved variable magnification groove 3121 and the second curved variable magnification groove 3122 (the first sliding sleeve screw and the second sliding sleeve screw have the same specifications, both are sliding sleeve screws 318, and the first guide sleeve and the second guide sleeve have the same specifications, both are guide sleeves 319);

[0067] A step groove for placing the second field lens 302 is provided at one end of the inner wall of the image relay lens tube 313 near the object side. The second field lens 302 is located in the step groove and fixed by the second field lens retaining ring 308. The outer wall of the second field lens retaining ring 308 is fixedly connected to the inner wall of the front connector 309;

[0068] A third field lens frame 314 is fixed in the spherical head portion at one end of the image relay lens tube 313 near the image side. The third field lens 304 is disposed in the third field lens frame 314 and fixed by the third field lens retaining ring 315; a diaphragm 316 fixed to the image relay lens tube 313 is disposed adjacent to one end of the third field lens frame 314 near the image side.

[0069] The advantages of the parallax correction mechanism including the first thread and the second thread are as follows: The existing correction method is to correct through the thread fit between the reticle frame and the image relay lens tube. Due to the direction requirement of the reticle lines, the reticle plate is adjusted by an axial movement of at least 1 / 4 pitch (usually 1 pitch) of rotation. Because the thread pitch is affected by the actual processing conditions, the correction accuracy is relatively low. In this method, by setting the first thread and the second thread with the same direction but different pitches, when the reticle connector 305 is rotated, the varifocal image relay group 3 and the reticle plate 301 move in the same direction along the optical axis, but the moving distances are different. The distance difference generated when the reticle plate 301 and the varifocal image relay group 3 move is determined by the rotation amount of the reticle connector 305 and the pitch difference between the first thread and the second thread. The fineness of parallax correction can be adjusted by adjusting the pitch difference, and the parallax correction accuracy can exceed the minimum parallax recognizable by the human eye. During adjustment, only the external reticle connector 305 rotates, and the reticle plate 301 does not rotate but only performs axial translation movement, avoiding the lenses being contaminated by dirt or dust due to thread rotation and improving the assembly efficiency of the telescopic sight.

[0070] Further, referring to Figure 11 , the spherical head portion of the image relay lens tube 303 is fixed in the lens tube 701 through the front washer 707, the elastic washer 706, and the ball head retaining ring 705. A slotted hole is further provided on the side wall of the spherical head portion of the image relay lens tube 313. The inner end of a limit screw 708 is located in the slotted hole, and the outer end of the limit screw 708 is fixed to the lens tube 701;

[0071] The zoom handwheel group 7 includes a zoom handwheel 702 and a zoom screw 703. The zoom handwheel 702 is sleeved on the outer side of the end of the lens tube 701 close to the image side. One end of the zoom handwheel 702 contacts the lens tube 701, and the other end contacts the eyepiece tube 704. A third sealing ring 710 is arranged on the contact surface between the zoom handwheel 702 and the lens tube 701, and a second sealing ring 709 is arranged on the contact surface between the zoom handwheel 702 and the eyepiece tube 704. The eyepiece tube 704 is the part of the eyepiece group 4 fixed to the end of the lens tube 701 close to the image side. The inner side of the zoom screw 703 is a smooth rod part, and the outer side is a threaded part. The smooth rod part of the zoom screw 703 passes through the zoom opening groove and is located in the limit groove 3123. The zoom opening groove (the opening angle in this embodiment is 216°, and the opening angles in other embodiments are determined by the zoom curve of the specific optical system) is arranged on the side wall of the lens tube 701, and the limit groove 3123 is arranged on the side wall of the zoom tube 302.

[0072] During the zoom operation, by rotating the zoom handwheel 702, the zoom tube 312 is driven, and a pair of sliding sleeve screws 318 move in the first curve zoom groove 3121 and the second curve zoom groove 3122 respectively, thereby driving the first relay lens 3031 and the second relay lens 3032 to horizontally move along the optical axis direction in the relay lens tube 313.

[0073] Furthermore, referring to Figure 8 , Figure 9 , Figure 10 , Figure 12 , the switch illumination group 6 includes a switch base 613. The bottom of the switch base 613 is a ring structure. A plastic washer 614 is arranged below the ring structure at the bottom of the switch base 613. A washer 612, a brush plate 611, and a limit ring 610 are sequentially arranged above the ring structure at the bottom of the switch base 613. The plastic washer 614, the brush plate 611, and the limit ring 610 are fixed to the lens tube 701 by 6 evenly distributed connecting screws 609. The washer 612 is connected in a matching manner with the ring structure at the bottom of the switch base 613, and the washer 612 and the switch base 613 are radially fixed to each other;

[0074] In the middle of the inner side of the switch base 613, there is a stepped surface. A slot is opened on the stepped surface. A wiring board 608 is arranged on the stepped surface. There is a notch at the edge of the wiring board 608. An upper limit ring 607 is arranged on the wiring board 608. A plug rod is arranged downward on the upper limit ring 607. The plug rod of the upper limit ring 607 passes through the notch at the edge of the wiring board 608 and is located in the slot on the stepped surface of the switch base 613. Above the upper limit ring 607, there is a wiring board pressing ring 606. The wiring board pressing ring 606 is threadedly connected to the inner wall of the switch base 613 and (presses downward) to axially fix the upper limit ring 607, the wiring board 608 and the switch base 613. A battery 605 is arranged in the wiring board pressing ring 606. The bottom of the battery 605 is the negative electrode and is in contact with the contact at the top of the wiring board 608. The side of the battery 605 is the positive electrode and is in contact with the wiring board pressing ring. Above the battery 605, there is a battery cover 601 threadedly connected to the switch base 613. A battery conducting brush 603 with elasticity and used to press the battery is fixed to the bottom of the battery cover 601 through a retaining ring 604.

[0075] On the top surface of the brush board 611, a pair of brush pieces are fixed. One end of one brush piece is in contact with and electrically connected to the central area at the bottom of the wiring board 608, and the other end is electrically connected to the negative electrode of the light-emitting diode. The central area at the bottom of the wiring board 608 is electrically connected to the bottom negative electrode of the battery 605 through the contact at the top of the wiring board 608. One end of the other brush piece is in contact with and electrically connected to the edge area at the bottom of the wiring board 608, and is sequentially connected to the positive electrode on the side of the battery through the edge of the wiring board, the upper limit ring, and the wiring board pressing ring. The other end is electrically connected to the positive electrode of the light-emitting diode. The edge area at the bottom of the wiring board 608 is divided into several non-connected edge sub-areas. Different edge sub-areas are connected to the central area at the bottom of the wiring board 608 by resistors with different resistances.

[0076] Furthermore, a wrench groove is arranged on the top of the battery cover 601. When in use, a coin can be used as a wrench to rotate and remove the battery cover 601 to replace the battery 605.

[0077] Furthermore, a first sealing ring 602 is arranged between the battery cover 601 and the battery base 613.

[0078] When the switch lighting group is in use, rotate the switch base. At this time, the washer 612, wiring board 608, upper limit ring 607, wiring board retaining ring 606, battery 605, snap ring 604, battery conducting brush 603, and battery cover 601 rotate together, while the limit ring 610 and brush board 611 are fixed to the lens tube 701 due to the fixation of the connecting screw 609 and do not rotate. Thus, relative rotation occurs between the brush board 611 and the wiring board 608. Furthermore, relative displacement occurs between the brush piece on the brush board 611 that contacts the bottom edge area of the wiring board of the wiring board 608 and the bottom of the wiring board. During the rotation process, this brush piece contacts different edge sub-areas at the bottom of the wiring board 608, thereby changing the access resistance in the energizing circuit of the light-emitting diode and causing the brightness of the light-emitting diode to change (setting a certain resistance to infinity or directly opening the circuit can achieve the turning off of the light-emitting diode).

[0079] A downward V-shaped elastic piece is provided on the outer edge of the limit ring 610. Correspondingly, the washer 612 is provided with a number of downward notches (12 in this embodiment). The bottom of the switch base 613 is provided with an opening for cooperating with the outer edge of the downward protruding notch of the washer 612, so that the bottom of the switch base 613 rotates synchronously with the washer 612. Based on the above structural features, when the switch base 613 rotates, the bottom of the switch base 613 drives the washer 612 to rotate. During the rotation process, the V-shaped elastic piece of the limit ring 610 cycles through the process of "being extruded out of the washer notch by the rotational force - being snapped into the notch under the influence of its own elastic force", thereby providing a sense of paragraph during the rotation adjustment process. The number of washer notches corresponds to the number of adjustment gears.

[0080] The above are only embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included within the patent protection scope of the present invention.

Claims

1. An optical system of a six-fold ratio white light aiming sight, characterized in that: It includes an objective first lens, a cemented objective lens, a first field lens, a reticle, a second field lens, a first image relay lens and a second image relay lens, a third field lens, a cemented eyepiece, and an eyepiece third lens, which are arranged in sequence from the object side to the image side; wherein the first image relay lens and the second image relay lens have the same structure and are arranged in mirror symmetry.

2. The optical system of the six-fold ratio white light aiming sight according to claim 1, characterized in that: The objective first lens is a first plano-convex lens, the cemented objective lens is composed of a first biconvex lens and a first biconcave lens cemented together, the first field lens is a first meniscus lens, the second field lens is a second plano-convex lens, the first image relay lens is composed of a second meniscus lens and a second biconvex lens cemented together, the second image relay lens is composed of a third biconvex lens and a third meniscus lens cemented together, the third field lens is a fourth meniscus lens, the cemented eyepiece is composed of a second biconcave lens and a fourth biconvex lens cemented together, and the eyepiece third lens is a fifth biconvex lens.

3. The optical system of the six-fold ratio white light aiming sight according to claim 2, characterized in that: The first lens of the objective lens and the cemented lens form the objective lens optical system, and the cemented eyepiece and the third lens of the eyepiece form the eyepiece optical system. The focal length F0 of the objective lens optical system and the focal length F of the eyepiece optical system e satisfy 1.443 ≥ F0 / F e .

4. The optical system of the six-fold ratio white light aiming sight according to claim 3, characterized in that: The air interval between the objective first lens and the cemented objective lens ranges from 1.1 mm to 1.2 mm, the air interval between the cemented objective lens and the first field lens ranges from 30 mm to 40 mm, the air interval between the first field lens and the reticle ranges from 5 mm to 10 mm, and the air interval between the reticle and the second field lens ranges from 5 mm to 10 mm; the image-side focal plane of the objective optical system is the first image plane, the object-side focal plane of the eyepiece optical system is the second image plane, the interval between the first image plane and the second image plane ranges from 100 mm to 110 mm, the air interval between the third field lens and the second image plane ranges from 1 mm to 5 mm, the air interval between the cemented eyepiece and the second image plane ranges from 10 mm to 15 mm, and the air interval between the eyepiece third lens and the cemented eyepiece ranges from 1 mm to 5 mm.

5. The optical system of the six-fold white light aiming scope according to claim 3, characterized in that: The curvature radius of the object-side side surface of the objective first lens ranges from 40 mm to 50 mm, and the side surface close to the cemented lens is a plane; The curvature radius of the side surface of the cemented objective lens close to the objective first lens ranges from 40 mm to 50 mm, the curvature radius of the cemented surface ranges from -50 mm to -60 mm, and the curvature radius of the side surface close to the first field lens ranges from 80 mm to 90 mm; The curvature radius of the side surface of the first field lens close to the cemented lens ranges from 20 mm to 30 mm, and the curvature radius of the side surface close to the reticle ranges from 100 mm to 110 mm; The side surface of the second field lens close to the reticle is a plane, and the curvature radius of the side surface close to the image relay lens ranges from -20 mm to -30 mm; The curvature radius of the side surface of the first image relay lens close to the second field lens ranges from 30 mm to 40 mm, the curvature radius of the cemented surface ranges from 10 mm to 20 mm, and the curvature radius of the side surface close to the image side ranges from -40 mm to -50 mm; The curvature radius of the side surface of the second image relay lens close to the first image relay lens ranges from 40 mm to 50 mm, the curvature radius of the cemented surface ranges from -10 mm to -20 mm, and the curvature radius of the side surface close to the image side ranges from -30 mm to -40 mm; The curvature radius of the side of the third field lens close to the image transfer lens ranges from -20mm to -30mm, and the curvature radius of the side close to the eyepiece ranges from -100mm to -140mm; The curvature radius of the side of the glued eyepiece close to the third field lens ranges from -20mm to -30mm, the curvature radius of the glued surface ranges from 30mm to 40mm, and the curvature radius of the side close to the third lens of the eyepiece ranges from -10mm to -20mm; The curvature radius of the side of the third lens of the eyepiece close to the glued eyepiece ranges from 80mm to 90mm, and the curvature radius of the side close to the image side ranges from -30mm to -40mm.

6. A six - fold white - light aiming sight using the optical system according to any one of claims 1 - 5, characterized in that: The invention comprises a lens tube, in which an objective lens group, a first field lens group, a graticule group, a zoom image transfer group and an eyepiece group are arranged in sequence from the object side to the image side; a zoom handwheel group connected to the zoom image transfer group in transmission and an adjusting screw group for adjusting the trajectory and windage are arranged outside the lens tube; the objective lens group comprises the first lens and a cemented lens of the objective lens, the first field lens group comprises the first field lens, the graticule group comprises the graticule plate, the zoom image transfer group comprises the second field lens, the first image transfer lens, the second image transfer lens and the third field lens, and the eyepiece group comprises the cemented eyepiece and the eyepiece third lens.

7. The six-fold ratio white light aiming sight according to claim 6, characterized in that: The graticule group is provided with a light-emitting diode for lighting the graticule lines on the graticule plate; and a switch lighting group for turning on and off the light-emitting diode and adjusting the brightness of the light-emitting diode is also provided outside the mirror tube.

8. The six-fold ratio white light aiming sight according to claim 6, characterized in that: The zoom image conversion group and the graticule group are coaxially arranged adjacent to each other along the optical axis direction, a graticule joint is sleeved on the outer sides of the adjacent ends of the graticule group and the zoom image conversion group, the graticule joint and the graticule group are connected by a first thread, and the graticule joint and the zoom image conversion group are connected by a second thread, the first thread and the second thread have the same direction but different pitches; a plurality of set screws are arranged on the threaded surfaces of the first thread and the second thread along the circumferential direction; The zoom image conversion group includes an image conversion lens tube and a zoom tube. The zoom tube is sleeved on the outside of the image conversion lens tube, and both ends of the image conversion lens tube extend from the inside of the zoom tube. The end of the image conversion lens tube close to the image side is a ball head, and the outer diameter of the ball head is larger than the outer diameter of the zoom tube. A zoom gasket sleeved on the outside of the image conversion lens tube is provided between the ball head and the zoom tube. The end of the image conversion lens tube close to the object side is connected to a front joint for fixing the axial position of the zoom tube. A second field lens is fixed to one end of the image transfer lens tube close to the object side, a third field lens is fixed to the ball head of the image transfer lens tube close to the image side, a straight line groove is arranged on the side wall of the image transfer lens tube; a first curved zoom groove and a second curved zoom groove are arranged on the side wall of the zoom tube, a first image transfer lens and a second image transfer lens are arranged inside the image transfer lens tube, the first image transfer lens and the second image transfer lens are both fixed by an image transfer lens frame located inside the image transfer lens tube, a first sliding sleeve screw is fixed to the side wall of the image transfer lens frame for fixing the first image transfer lens, a second sliding sleeve screw is fixed to the side wall of the image transfer lens frame for fixing the second image transfer lens, the outer ends of the first sliding sleeve screw and the second sliding sleeve screw are respectively sleeved with a first guide sleeve and a second guide sleeve, the first guide sleeve and the second guide sleeve pass through the straight line groove and are respectively located in the first curved zoom groove and the second curved zoom groove; A step groove for placing a second field lens is provided at one end of the inner wall of the image relay lens tube near the object side. The second field lens is located in the step groove and fixed by a second field lens retaining ring. The outer wall of the second field lens retaining ring is fixedly connected to the inner wall of the front adapter. A third field lens frame is fixed in the spherical head portion at one end of the image relay lens tube near the image side. The third field lens is arranged in the third field lens frame and fixed by a third field lens retaining ring. A diaphragm fixed to the image relay lens tube is arranged adjacent to one end of the third field lens frame near the image side.

9. The six-fold ratio white light aiming sight according to claim 8, characterized in that: The spherical head portion of the image relay lens tube is fixed in the lens tube through a front washer, an elastic washer and a ball head retaining ring. A slotted hole is also provided on the side wall of the spherical head portion of the image relay lens tube. The inner end of a limit screw is located in the slotted hole, and the outer end of the limit screw is fixed to the lens tube. The zoom handwheel group includes a zoom handwheel and a zoom screw. A zoom handwheel is sleeved on the outer side of the end of the lens tube near the image side. One end of the zoom handwheel contacts the lens tube, and the other end contacts the eyepiece barrel. The eyepiece barrel is the part of the eyepiece group fixed to the end of the lens tube near the image side. Third sealing rings and second sealing rings are respectively arranged at the contact surfaces of the zoom handwheel with the lens tube and the eyepiece barrel. The inner side of the zoom screw is a smooth rod portion, and the outer side is a threaded portion. The smooth rod portion of the zoom screw passes through a zoom slotted opening and is located in a limit groove. The zoom slotted opening is arranged on the side wall of the lens tube, and the limit groove is arranged on the side wall of the zoom tube.

10. The six-fold ratio white light aiming sight according to claim 7, wherein: The switch illumination group includes a switch base. The bottom of the switch base is of an annular structure. A plastic washer is arranged below the annular structure at the bottom of the switch base. A washer, a brush plate and a limit ring are sequentially arranged above the annular structure at the bottom of the switch base. The plastic washer, the brush plate and the limit ring are fixed to the lens tube by a plurality of connecting screws. The washer is connected in cooperation with the annular structure at the bottom of the switch base, and the washer and the switch base are radially fixed to each other. A stepped surface is arranged in the middle of the inner side of the switch base. A slot is opened on the stepped surface. A wiring board is arranged on the stepped surface. A notch is arranged at the edge of the wiring board. An upper limit ring is arranged on the wiring board. An insertion rod is arranged downward on the upper limit ring. The insertion rod of the upper limit ring passes through the notch at the edge of the wiring board and is located in the slot on the stepped surface of the switch base. A wiring board retaining ring is arranged above the upper limit ring. The wiring board retaining ring is connected to the inner wall of the switch base to axially fix the upper limit ring, the wiring board and the switch base. A battery is arranged in the wiring board retaining ring. The bottom of the battery is the negative electrode and contacts the contact at the top of the wiring board. The side of the battery is the positive electrode and contacts the wiring board retaining ring. A battery cover threadedly connected to the switch base is arranged above the battery. A battery brush with elasticity and used for pressing the battery is fixed to the bottom of the battery cover through a retaining ring. A pair of brush pieces are fixed on the top surface of the brush plate. One end of one brush piece contacts and is electrically connected to the central area at the bottom of the wiring board, and the other end is electrically connected to the negative electrode of the light-emitting diode. The central area at the bottom of the wiring board is electrically connected to the bottom negative electrode of the battery through the contact point at the top of the wiring board; one end of the other brush piece contacts and is electrically connected to the edge area at the bottom of the wiring board, and is sequentially connected to the positive electrode on the side of the battery through the edge of the wiring board, the upper limit ring, and the wiring board pressing ring, and the other end is electrically connected to the positive electrode of the light-emitting diode; the edge area at the bottom of the wiring board is divided into several non-connected edge sub-areas, and resistors with different resistances are connected between different edge sub-areas and the central area at the bottom of the wiring board.

Images