Optical system of six-time-ratio white light sighting telescope

Abstract

The invention discloses an optical system of a six-time-ratio white light sighting telescope. The optical system comprises a first objective lens, a cemented objective lens, a first field lens, a reticle, a second field lens, a first image rotation lens, a second image rotation 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 invention relates to the technical field of sights, and in particular to an optical system of a six-fold ratio white light sight. Background Art

[0002] At present, in order to improve the accuracy of gun shooting, optical sights are generally installed on them. High-magnification white light sights have a wide range of uses. They can be used to search for targets at low magnification and large field of view, and to magnify and observe targets at high magnification and small field of view. Therefore, there is a large demand for high-magnification sights in the market, but current high-magnification white light sights generally have problems such as poor image quality, complex structure, and low stability, and are difficult to withstand the impact of the gun. At the same time, most white light sights do not pay attention to human-machine function design, which also brings many inconveniences to users. Summary of the invention

[0003] The purpose of the present invention is to provide an optical system of a six-fold ratio white light sight to achieve high efficiency and stability of the white light sight.

[0004] In order to solve the above technical problems, the present invention provides a technical solution: an optical system of a six-fold ratio white light sight, comprising an objective first lens, a glued compound lens, a first field lens, a graticule, a second field lens, a first image transfer lens and a second image transfer lens, a third field lens, a glued eyepiece, and an eyepiece third lens, which are arranged in sequence from the object side to the image side; wherein the first image transfer lens and the second image transfer lens have the same structure and are arranged in mirror symmetry.

[0005] According to the above scheme, the first lens of the objective lens is a first plano-convex lens, the glued eyepiece is formed by gluing a first biconvex lens and a first biconcave lens, the first field lens is a first meniscus lens, the second field lens is a second plano-convex lens, the first image transfer lens is formed by gluing a second meniscus lens and a second biconvex lens, the second image transfer lens is formed by gluing a third biconvex lens and a third meniscus lens, the third field lens is a fourth meniscus lens, the glued eyepiece is formed by gluing a second biconcave lens and a fourth biconvex lens, and the third lens of the eyepiece is a fifth biconvex lens.

[0006] According to the above scheme, the first lens of the objective lens and the cemented lens constitute the objective lens optical system, the cemented eyepiece and the third lens of the eyepiece constitute the eyepiece optical system, and the focal length F0 of the objective lens optical system and the focal length F e Satisfy 1.443 ≥ F0 / F e .

[0007] According to the above scheme, the air gap between the first lens of the objective lens and the glued compound lens is in the range of 1.1mm to 1.2mm, the air gap between the glued compound lens and the first field lens is in the range of 30mm to 40mm, the air gap between the first field lens and the graticule is in the range of 5mm to 10mm, and the air gap between the graticule and the second field lens is in the range of 5mm to 10mm; 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 gap between the first image plane and the second image plane is in the range of 100mm to 110mm, the air gap between the third field lens and the second image plane is in the range of 1mm to 5mm, the air gap between the glued eyepiece and the second image plane is in the range of 10mm to 15mm, and the air gap between the third lens of the eyepiece and the glued eyepiece is in the range of 1mm to 5mm.

[0008] According to the above scheme,

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

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

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

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

[0013] The curvature radius of the side of the first image transfer lens close to the second field lens is in the range of 30mm to 40mm, the curvature radius of the bonding surface is in the range of 10mm to 20mm, and the curvature radius of the side close to the image side is in the range of -40mm to -50mm;

[0014] The curvature radius of the side of the second image-transmitting lens close to the first image-transmitting lens is in the range of 40 mm to 50 mm, the curvature radius of the bonding surface is in the range of -10 mm to -20 mm, and the curvature radius of the side close to the image side is in the range of -30 mm to -40 mm;

[0015] 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;

[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 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;

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

[0024] A third field lens frame is fixed in the ball head of the image-transmitting lens tube near the image side, and the third field lens is arranged in the third field lens frame and fixed by a third field lens pressing ring; an aperture fixed to the image-transmitting lens tube is arranged near the image side end of the third field lens frame.

[0025] According to the above scheme, the ball head of the image transfer lens tube is fixed in the lens tube through the front washer, the elastic washer and the ball head pressure ring. A slot is also provided on the side wall of the ball head of the image transfer lens tube. An inner end of a limit screw is located in the slot, and an outer end of the limit screw is fixed to the lens tube.

[0026] The magnification handwheel group includes a magnification handwheel and a magnification screw. The outer side of the end of the lens tube close to the image side is sleeved with a magnification handwheel. One end of the magnification handwheel contacts the lens tube, and the other end contacts the eyepiece barrel. The eyepiece barrel is a part of the eyepiece group that is fixed to the end of the lens tube close to the image side, and a third sealing ring and a second sealing ring are respectively provided at the contact surface positions of the magnification handwheel, the lens tube and the eyepiece barrel; the inner side of the magnification screw is a smooth rod portion, and the outer side is a threaded portion. The smooth rod portion of the magnification screw passes through the magnification opening groove and is located in the limit groove. The magnification opening groove is arranged on the side wall of the lens tube, and the limit groove is arranged on the side wall of the magnification tube.

[0027] According to the above scheme, the switch lighting group includes a switch seat, the bottom of the switch seat is an annular structure, a plastic washer is arranged below the annular structure at the bottom of the switch seat, and a washer, a brush plate, and a limit ring are arranged above the annular structure at the bottom of the switch seat in sequence, the plastic washer, the brush plate, and the limit ring are fixed to the mirror tube by a number of connecting screws, the washer is matched and connected with the annular structure at the bottom of the switch base, and the washer and the switch seat are radially fixed;

[0028] A stepped surface is provided in the middle of the inner side of the switch seat, a slot is provided on the stepped surface, a wiring board is provided on the stepped surface, a notch is provided on the edge of the wiring board, an upper limit ring is provided on the wiring board, a plug rod is provided downwardly on the upper limit ring, the plug rod of the upper limit ring passes through the notch on the edge of the wiring board and is located in the slot on the stepped surface of the switch seat; a wiring board pressing ring is provided above the upper limit ring, the wiring board pressing ring is connected to the inner wall of the switch seat and axially fixes the upper limit ring, the wiring board and the switch seat; a battery is provided in the wiring board pressing ring, the bottom of the battery is the negative pole and contacts the contact at the top of the wiring board, the side of the battery is the positive pole and contacts the wiring board pressing ring, a battery cover threadedly connected to the switch seat is provided above the battery, and a battery brush having elasticity and used for pressing the battery is fixed at the bottom of the battery cover through a retaining ring;

[0029] A pair of brush sheets are fixed on the top surface of the brush plate, one end of one of the brush sheets is in contact with and electrically connected to the central area at the bottom of the terminal 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 terminal board is electrically connected to the negative electrode at the bottom of the battery through the contact at the top of the terminal board; one end of the other brush sheet is in contact with and electrically connected to the edge area at the bottom of the terminal board, and is connected to the positive electrode on the side of the battery through the edge of the terminal board, the upper limit ring, and the terminal board pressure ring in sequence, and the other end is electrically connected to the positive electrode of the light-emitting diode; the edge area at the bottom of the terminal board is divided into a number of unconnected edge sub-areas, and resistors with different resistance values ​​are connected between different edge sub-areas and the central area at the bottom of the terminal board.

[0030] The beneficial effects of the present invention are:

[0031] 1. The first image-transmitting lens and the second image-transmitting lens as the zoom group and the compensation group are mirror-symmetrical, which not only saves costs and brings convenience to design, processing, assembly and correction, but is also very beneficial to its aberration correction, including automatic compensation of vertical axis aberration. The two groups of axial aberration can be corrected separately.

[0032] 2. The "positive-positive" optical zoom structure makes the overall structure of the scope more compact, and can achieve smooth zoom at different magnifications, ensuring excellent image quality.

[0033] 3. The structure of the front scale allows the scale surface to change with the magnification during the zoom process, reducing the zoom error.

[0034] 4. There should be enough space between the glass reticle and the front and rear mirror groups for parallax adjustment in subsequent assembly.

[0035] 5. The optical system ensures that the image quality at both high and low magnifications meets the requirements of the human eye. At the same time, the chromatic aberration at high magnification is not obvious. It can be used normally during the magnification change from high to low magnification, and the system aberration correction is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1It is a schematic diagram of the optical system structure of a six-fold ratio white light sight according to the first embodiment of the present invention;

[0037] Figure 2 It is a spot diagram of an equivalent eyepiece of the optical system of the six-fold ratio white light sight of the first embodiment of the present invention at 1x;

[0038] Figure 3 It is a spot diagram of an equivalent eyepiece of the optical system of the six-fold ratio white light sight of the first embodiment of the present invention at six times magnification;

[0039] Figure 4 It is an objective lens point diagram of the optical system of the six-fold ratio white light sight according to the first embodiment of the present invention;

[0040] Figure 5 It is a first viewing angle cross-sectional view of a six-fold ratio white light sight according to a second embodiment of the present invention;

[0041] Figure 6 It is a cross-sectional view from a second viewing angle of the six-fold ratio white light sight of the second embodiment of the present invention;

[0042] Figure 7 is a cross-sectional view of a zoom image rotation group according to a second embodiment of the present invention;

[0043] Figure 8 is an exploded assembly diagram of a switch lighting assembly according to a second embodiment of the present invention;

[0044] Fig. 9 is a cross-sectional view from a first viewing angle of a switch lighting assembly according to a second embodiment of the present invention;

[0045] Fig.10 is a cross-sectional view from a second viewing angle of the switch lighting assembly of the second embodiment of the present invention;

[0046] Fig.11 is a cross-sectional view of a variable power hand wheel assembly according to a second embodiment of the present invention;

[0047] Fig.12 is an axonometric view of a switch base according to a second embodiment of the present invention;

[0048] Fig.13 It is an expanded view of the variable power tube of the second embodiment of the present invention.

[0049] In the figure: 1-objective lens group, 2-first field lens group, 3-zoom image transfer group, 4-eyepiece group, 5-adjusting screw group, 6-switch lighting group, 7-zoom handwheel group, 101-objective lens first lens, 102-glued objective lens, 201-first field lens, 301-graticule, 302-second field lens, 3031-first image transfer lens, 3032-second image transfer lens, 304-third field lens, 401-glued eyepiece, 402-eyepiece third lens, 305-graticule joint, 306-graticule plate pressure ring, 307-graticule frame, 308-second field lens pressure ring, 309-front joint, 310-image transfer lens frame, 311-image transfer lens pressure ring, 312-zoom tube, 3121-first curve zoom groove, 3122-second curve zoom groove, 3123-limiting groove, 3 13-image transfer lens tube, 314-third field lens frame, 315-third field lens pressure ring, 316-aperture, 317-zoom washer, 318-slide screw, 319-guide sleeve, 601-battery cover, 602-first sealing ring, 603-battery guide brush, 604-retaining ring, 605-battery, 606-terminal board pressure ring, 607-upper limit ring, 608-terminal board, 609-connecting screw, 610-limiting ring, 611-brush plate, 612-washer, 613-switch seat, 614-plastic washer, 701-mirror tube, 702-zoom handwheel, 703-zoom screw, 704-eyepiece tube, 705-ball head pressure ring, 706-elastic washer, 707-front washer, 708-limiting screw, 709-second sealing ring, 710-third sealing ring. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0051] Embodiment 1:

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

[0053] Furthermore, the first lens 101 of the objective lens is a first plano-convex lens, the glued objective lens 102 is formed by gluing 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 image transfer lens 3031 is formed by gluing a second meniscus lens and a second biconvex lens, the second image transfer lens 3032 is formed by gluing a third biconvex lens and a third meniscus lens, the third field lens 304 is a fourth meniscus lens, the glued eyepiece 401 is formed by gluing a second biconcave lens and a fourth biconvex lens, and the eyepiece third lens 402 is a fifth biconvex lens.

[0054] Furthermore, the objective first lens 101 and the cemented lens 102 constitute an objective optical system, the cemented eyepiece 401 and the eyepiece third lens 402 constitute an eyepiece optical system, and the focal length F0 of the objective optical system and the focal length F e Satisfy 1.443 ≥ F0 / F e .

[0055] Furthermore, the air gap between the first lens 101 of the objective lens and the glued compound lens 102 is 1.116 mm, the air gap between the glued compound lens 102 and the first field lens 201 is 38.313 mm, the air gap between the first field lens 201 and the grating plate 301 is 8.586 mm, and the air gap between the grating plate 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 interval 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 glued eyepiece 401 and the second image plane is 14.4 mm, and the air gap between the third lens 402 of the eyepiece and the glued eyepiece 401 is 2.976 mm.

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

[0057] Furthermore, since the first image-relay lens 3031 (magnification group) needs to move axially along the optical axis when the sight is changing magnification, thereby changing the combined focal length of the optical system, the image of the magnification group also moves accordingly. In order to maintain the optical system image plane fixed, the second image-relay lens 3032 (compensation group) needs to move according to the movement of the first image-relay lens 3031 (magnification group), thereby achieving compensation, so that the image point of the magnification group remains 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 are in a nonlinear correspondence. After the light passes through the zoom group and the compensation group in the zoom image relay group 3, it is imaged on the second image plane, and then the parallel light is emitted through the eyepiece group 4 to form an image on the retina; therefore, the variable air interval between the second field lens 302 and the first image relay lens 3031 (zoom group) is 1.31~31.875mm, the variable air interval between the first image relay lens 3031 (zoom group) and the second image relay lens 3032 (compensation group) is 3.794~15.397mm, and the variable air interval between the second image relay lens 3032 (compensation group) and the third field lens 304 is 64.125-14.998mm.

[0058] Furthermore, the eye side of the graticule plate 301 is a graticule surface, the graticule surface coincides with the first image plane, and graticule lines are arranged on the graticule surface.

[0059] The optical system performance is shown in Figure 2 to Figure 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 fixed by manual assembly with a wrench so that the graticule plate 301 does not rotate.

[0064] Further, see Figure 7 , Fig.13 The zoom image conversion group 3 and the grating group are coaxially arranged adjacent to each other along the optical axis direction. A grating joint 305 is sleeved on the outer side of the adjacent ends of the grating group and the zoom image conversion group 3. The grating joint 305 and the grating group are connected by a first thread (the pitch of the embodiment is 0.75mm), and the grating joint 305 and the zoom image conversion group 3 are connected by a second thread (the pitch of the embodiment is 0.5mm). The first thread and the second thread have the same direction but different pitches. Eight set screws (for fixing after parallax correction) are arranged on the threaded surface of the first thread and the second thread along the circumferential direction.

[0065] The zoom image conversion group 3 includes an image conversion lens tube 313 and a zoom tube 312. The zoom tube 312 is sleeved on the outside of the image conversion lens tube 313, and both ends of the image conversion lens tube 313 extend from the inside of the zoom tube 312. The end of the image conversion lens tube 313 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 312. A zoom gasket 317 sleeved on the outside of the image conversion lens tube 313 is provided between the ball head and the zoom tube 312. The end of the image conversion lens tube 313 close to the object side is connected to a front joint 309 for fixing the axial position of the zoom tube 312.

[0066] A second field lens 302 is fixed to one end of the image transfer lens tube 313 near the object side, a third field lens 304 is fixed to the ball head of the image transfer lens tube 313 near the image side, a straight groove is arranged on the side wall of the image transfer lens tube 313; a first curved magnification change groove 3121 and a second curved magnification change groove 3122 are arranged on the side wall of the zoom tube 312, a first image transfer lens 3031 and a second image transfer lens 3032 are arranged inside the image transfer lens tube 313, the first image transfer lens 3031 and the second image transfer lens 3032 are both fixed by an image transfer lens frame 310 located inside the image transfer lens tube 313, and the image transfer lens pressing ring 312 is threadedly connected with the image transfer lens frame 310 to fix the first image transfer lens 3 031 and the second image transfer lens 3032 are fixed in the image transfer lens frame 310, a first sliding screw is fixed on the side wall of the image transfer lens frame 310 for fixing the first image transfer lens 3031, and a second sliding screw is fixed on the side wall of the image transfer lens frame 310 for fixing the second image transfer lens 3032, the outer ends of the first sliding screw and the second sliding 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 magnification change groove 3121 and the second curved magnification change groove 3122 (the first sliding screw and the second sliding screw have the same specifications, both are sliding screws 318, and the first guide sleeve and the second guide sleeve have the same specifications, both are guide sleeves 319);

[0067] The inner wall of the image transfer lens tube 313 is provided with a step groove for placing the second field lens 302 near the object side. The second field lens 302 is located in the step groove and fixed by a second field lens pressing ring 308. The outer wall of the second field lens pressing ring 308 is fixedly connected to the inner wall of the front joint 309.

[0068] A third field lens frame 314 is fixed in the ball head of the image-transmitting lens tube 313 near the image side. The third field lens 304 is arranged in the third field lens frame 314 and fixed by a third field lens pressing ring 315. An aperture 316 fixed to the image-transmitting lens tube 313 is arranged near the image side end of the third field lens frame 314.

[0069] The advantage of the parallax correction mechanism including the first thread and the second thread is that the existing correction method is to correct by the thread cooperation of the graticule frame and the image transfer lens tube. Due to the direction requirement of the graticule line, the graticule is adjusted by rotating the axial movement of at least 1 / 4 pitch (1 pitch in most cases). Because the thread pitch is affected by the actual processing conditions, the correction accuracy is low. The method sets the first thread and the second thread with the same direction but different pitches, so that when the graticule joint 305 is rotated, the zoom image transfer group 3 and the graticule 301 move in the same direction along the optical axis, but the moving distances are different. The distance difference generated when the graticule 301 and the zoom image transfer group 3 move is determined by the rotation amount of the graticule joint 305 and the pitch difference between the first thread and the second thread. The precision of the parallax correction can be adjusted by adjusting the pitch difference, and the parallax correction accuracy can exceed the minimum parallax recognized by the human eye. During adjustment, only the external dividing joint 305 rotates, and the dividing plate 301 does not rotate but only performs axial translation movement, thereby preventing the lens from being contaminated with dirt or dust due to thread rotation, thereby improving the assembly efficiency of the sight.

[0070] Further, see Fig.11 The ball head of the image transfer lens tube 303 is fixed to the lens tube 701 through the front washer 707, the elastic washer 706 and the ball head pressure ring 705. A slot is also provided on the side wall of the ball head of the image transfer lens tube 313. An inner end of a limit screw 708 is located in the slot, and the outer end of the limit screw 708 is fixed to the lens tube 701.

[0071] The zoom hand wheel assembly 7 includes a zoom hand wheel 702 and a zoom screw 703. The outer side of the end of the lens tube 701 close to the image side is provided with a zoom hand wheel 702. One end of the zoom hand wheel 702 contacts the lens tube 701, and the other end contacts the eyepiece barrel 704. A third sealing ring 710 is provided on the contact surface between the zoom hand wheel 702 and the lens tube 701, and a second sealing ring 709 is provided on the contact surface between the zoom hand wheel 702 and the eyepiece barrel 704. The eyepiece barrel 704 is the eyepiece assembly 4. The part that is fixed to the end of the lens tube 701 close to the image side; the inner side of the magnification screw 703 is a smooth rod portion, and the outer side is a threaded portion, the smooth rod portion of the magnification screw 703 passes through the magnification opening slot and is located in the limiting slot 3123, the magnification opening slot (the opening angle in this embodiment is 216°, and the opening angle in other embodiments is determined by the magnification curve of the specific optical system) is set on the side wall of the lens tube 701, and the limiting slot 3123 is set on the side wall of the magnification tube 302.

[0072] During the zoom operation, the zoom tube 312 is driven by rotating the zoom hand wheel 702, which drives a pair of sliding screws 318 to move in the first curved zoom groove 3121 and the second curved zoom groove 3122 respectively, thereby driving the first image transfer lens 3031 and the second image transfer lens 3032 to move horizontally along the optical axis in the image transfer lens tube 313.

[0073] Further, see Figure 8 , Fig. 9 , Fig.10 , Fig.12 The switch lighting group 6 includes a switch seat 613, the bottom of the switch seat 613 is an annular structure, a plastic washer 614 is arranged below the annular structure at the bottom of the switch seat 613, and a washer 612, a brush plate 611, and a limit ring 610 are arranged in sequence above the annular structure at the bottom of the switch seat 613. The plastic washer 614, the brush plate 611, and the limit ring 610 are fixed to the mirror tube 701 by 6 evenly distributed connecting screws 609, the washer 612 is matched and connected with the annular structure at the bottom of the switch base 613, and the washer 612 and the switch base 613 are radially fixed;

[0074] A stepped surface is provided in the middle of the inner side of the switch seat 613, a slot is provided on the stepped surface, a wiring board 608 is provided on the stepped surface, a notch is provided on the edge of the wiring board 608, an upper limit ring 607 is provided on the wiring board 608, a plug rod is provided downwardly of 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 seat 613; a wiring board pressing ring 606 is provided above the upper limit ring 607, and the wiring board pressing ring 606 is connected to the inner wall of the switch seat 613 The upper limit ring 607, the terminal board 608 and the switch seat 613 are axially fixed by threaded connection (pressing downward); a battery 605 is arranged in the terminal board pressing ring 606, the bottom of the battery 605 is the negative pole and contacts the contact point at the top of the terminal board 608, the side of the battery 605 is the positive pole and contacts the terminal board pressing ring, and a battery cover 601 threadedly connected to the switch seat 613 is arranged above the battery 605, and a battery brush 603 with elasticity and used to press the battery is fixed at the bottom of the battery cover 601 through a retaining ring 604;

[0075] A pair of brush pieces are fixed on the top surface of the brush plate 611, one end of one of the brush pieces is in contact with and electrically connected to the bottom center area of ​​the terminal board 608, and the other end is electrically connected to the negative electrode of the light-emitting diode. The bottom center area of ​​the terminal board 608 is electrically connected to the bottom negative electrode of the battery 605 through the contact on the top of the terminal board 608; one end of the other brush piece is in contact with and electrically connected to the bottom edge area of ​​the terminal board 608, and is connected to the positive electrode of the battery side through the edge of the terminal board, the upper limit ring, and the terminal board pressure ring in sequence, and the other end is electrically connected to the positive electrode of the light-emitting diode; the bottom edge area of ​​the terminal board 608 is divided into a number of unconnected edge sub-areas, and resistors with different resistance values ​​are connected between different edge sub-areas and the bottom center area of ​​the terminal board 608.

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

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

[0078] When the switch lighting group is in use, the switch seat is rotated, and the washer 612, the terminal board 608, the upper limit ring 607, the terminal board pressure ring 606, the battery 605, the retaining ring 604, the battery brush 603, and the battery cover 601 rotate together, while the limit ring 610 and the brush plate 611 are fixed to the mirror tube 701 due to the fixation of the connecting screw 609 and do not rotate together; therefore, the brush plate 611 and the terminal board 608 rotate relative to each other, and then the brush piece on the brush plate 611 that contacts the terminal board bottom edge area of ​​the terminal board 608 is relatively displaced from the terminal board bottom, and during the rotation, the brush piece contacts different edge sub-areas of the bottom of the terminal board 608, thereby causing the access resistance in the power-on circuit of the light-emitting diode to change, causing the brightness of the light-emitting diode to change (a certain resistance is set to be infinite, or directly disconnected, so that the light-emitting diode can be turned off);

[0079] The outer edge of the limit ring 610 is provided with a downward V-shaped spring piece, and correspondingly, the washer 612 is provided with a plurality of downward notches (12 in this embodiment), and 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 and the washer 612 rotate synchronously. 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, and during the rotation process, the V-shaped spring piece of the limit ring 610 cycles through the process of "being squeezed out of the washer notch by the rotation force-being stuck in the notch under the influence of its own elastic force", thereby providing a sense of segmentation during the rotation adjustment process, and the number of the washer notches corresponds to the number of adjustment gears.

[0080] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An optical system of a six-fold white light sight, characterized in that: The invention comprises an objective lens first lens, a cemented objective lens, a first field lens, a graticule, a second field lens, a first image transfer lens and a second image transfer 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 transfer lens and the second image transfer lens have the same structure and are arranged in mirror symmetry.

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

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

4. The optical system of the six-fold ratio white light sight according to claim 3, characterized in that: The air gap range between the first lens of the objective lens and the glued compound lens is 1.1mm-1.2mm, the air gap range between the glued compound lens and the first field lens is 30mm-40mm, the air gap range between the first field lens and the graticule is 5mm-10mm, and the air gap range between the graticule and the second field lens is 5mm-10mm; 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 gap range between the first image plane and the second image plane is 100mm-110mm, the air gap range between the third field lens and the second image plane is 1mm-5mm, the air gap range between the glued eyepiece and the second image plane is 10mm-15mm, and the air gap range between the third lens of the eyepiece and the glued eyepiece is 1mm-5mm.

5. The optical system of the six-fold ratio white light sight according to claim 3, characterized in that: The curvature radius of the side surface of the first lens of the objective lens close to the object side is in the range of 40mm to 50mm, and the side surface close to the cemented lens is a plane; The curvature radius of the side of the glued composite lens close to the first lens of the objective lens ranges from 40mm to 50mm, the curvature radius of the glued surface ranges from -50mm to -60mm, and the curvature radius of the side close to the first field lens ranges from 80mm to 90mm; The curvature radius of the side of the first field lens close to the cemented lens ranges from 20 mm to 30 mm, and the curvature radius of the side close to the graticule ranges from 100 mm to 110 mm; The side of the second field lens close to the graticule is a plane, and the curvature radius of the side close to the image transfer lens ranges from -20mm to -30mm; The curvature radius of the side of the first image transfer lens close to the second field lens is in the range of 30mm to 40mm, the curvature radius of the bonding surface is in the range of 10mm to 20mm, and the curvature radius of the side close to the image side is in the range of -40mm to -50mm; The curvature radius of the side of the second image-transmitting lens close to the first image-transmitting lens is in the range of 40 mm to 50 mm, the curvature radius of the bonding surface is in the range of -10 mm to -20 mm, and the curvature radius of the side close to the image side is in the range of -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 sight using the optical system according to any one of claims 1 to 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 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 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 mirror is provided on the inner wall of the image transfer lens tube near the object side end. The second field mirror is located in the step groove and fixed by a second field mirror pressing ring. The outer wall of the second field mirror pressing ring is fixedly connected to the inner wall of the front joint. A third field lens frame is fixed in the ball head of the image-transmitting lens tube near the image side, and the third field lens is arranged in the third field lens frame and fixed by a third field lens pressing ring; an aperture fixed to the image-transmitting lens tube is arranged near the image side end of the third field lens frame.

9. The six-fold ratio white light sight according to claim 8, characterized in that: The ball head of the image transfer lens tube is fixed in the lens tube through a front washer, an elastic washer and a ball head pressure ring. A slot is also provided on the side wall of the ball head of the image transfer lens tube. An inner end of a limit screw is located in the slot, and an outer end of the limit screw is fixed to the lens tube. The magnification handwheel group includes a magnification handwheel and a magnification screw. The outer side of the end of the lens tube close to the image side is sleeved with a magnification handwheel. One end of the magnification handwheel contacts the lens tube, and the other end contacts the eyepiece barrel. The eyepiece barrel is a part of the eyepiece group that is fixed to the end of the lens tube close to the image side, and a third sealing ring and a second sealing ring are respectively provided at the contact surface positions of the magnification handwheel, the lens tube and the eyepiece barrel; the inner side of the magnification screw is a smooth rod portion, and the outer side is a threaded portion. The smooth rod portion of the magnification screw passes through the magnification opening groove and is located in the limit groove. The magnification opening groove is arranged on the side wall of the lens tube, and the limit groove is arranged on the side wall of the magnification tube.

10. The six-fold ratio white light sight according to claim 7, characterized in that: The switch lighting group includes a switch seat, the bottom of the switch seat is an annular structure, a plastic washer is arranged below the annular structure at the bottom of the switch seat, and a washer, a brush plate, and a limit ring are arranged above the annular structure at the bottom of the switch seat in sequence, the plastic washer, the brush plate, and the limit ring are fixed to the mirror tube by a plurality of connecting screws, the washer is matched and connected with the annular structure at the bottom of the switch base, and the washer and the switch seat are radially fixed; A stepped surface is provided in the middle of the inner side of the switch seat, a slot is provided on the stepped surface, a wiring board is provided on the stepped surface, a notch is provided on the edge of the wiring board, an upper limit ring is provided on the wiring board, a plug rod is provided downwardly on the upper limit ring, the plug rod of the upper limit ring passes through the notch on the edge of the wiring board and is located in the slot on the stepped surface of the switch seat; a wiring board pressing ring is provided above the upper limit ring, the wiring board pressing ring is connected to the inner wall of the switch seat and axially fixes the upper limit ring, the wiring board and the switch seat; a battery is provided in the wiring board pressing ring, the bottom of the battery is the negative pole and contacts the contact at the top of the wiring board, the side of the battery is the positive pole and contacts the wiring board pressing ring, a battery cover threadedly connected to the switch seat is provided above the battery, and a battery brush having elasticity and used for pressing the battery is fixed at the bottom of the battery cover through a retaining ring; A pair of brush sheets are fixed on the top surface of the brush plate, one end of one of the brush sheets is in contact with and electrically connected to the central area at the bottom of the terminal 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 terminal board is electrically connected to the negative electrode at the bottom of the battery through the contact at the top of the terminal board; one end of the other brush sheet is in contact with and electrically connected to the edge area at the bottom of the terminal board, and is connected to the positive electrode on the side of the battery through the edge of the terminal board, the upper limit ring, and the terminal board pressure ring in sequence, and the other end is electrically connected to the positive electrode of the light-emitting diode; the edge area at the bottom of the terminal board is divided into a number of unconnected edge sub-areas, and resistors with different resistance values ​​are connected between different edge sub-areas and the central area at the bottom of the terminal board.

Images