Coaxial laser ranging aiming system

Abstract

The utility model discloses a coaxial laser ranging aiming system, which relates to the technical field of aiming systems and comprises a laser transmitter, a collimating lens, a first cemented prism, a second cemented prism, a focusing lens, a photoelectric detector, an eyepiece and an objective lens. The collimating lens is arranged on a transmission light path of the incident light beam and is used for collimating the incident light beam into incident parallel light; the first cemented prism is arranged on a transmission light path of the incident parallel light and is used for reflecting the incident parallel light and enabling the incident parallel light to be emitted along an optical axis; the second cemented prism is arranged on the optical axis and is used for changing a transmission light path of the recycled light beam; the eyepiece, the second cemented prism, the first cemented prism and the objective lens are sequentially arranged along the extension direction of the optical axis. According to the coaxial laser ranging aiming system provided by the utility model, the recycling light beam, the emitting light beam, the eyepiece and the objective lens share the same optical axis, so that the problem that aiming and ranging are not at the same point in the prior art is solved, and the use error of gun aiming ranging is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of aiming systems, in particular to a coaxial laser ranging aiming system. Background Art

[0002] Laser rangefinder gun sights integrate the functions of a laser rangefinder and a riflescope. Before shooting, users can quickly and accurately determine the target distance using the laser rangefinder, while the riflescope helps them precisely aim at the target. This workflow greatly simplifies pre-shooting preparations and improves shooting efficiency.

[0003] Existing riflescopes with rangefinders typically have the transmitting system separate and parallel to the aiming system's optical axis, while the receiving system is embedded within the aiming system via prism reflection. This has the advantage of a simpler structure, but the disadvantage is that because the transmitting and aiming / receiving systems are not on the same axis, the ranging and aiming positions may differ during use. Utility Model Content

[0004] The purpose of the utility model is to provide a coaxial laser ranging and aiming system to solve the problems existing in the above-mentioned prior art and reduce the error of gun aiming and ranging.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides a coaxial laser ranging and aiming system, comprising:

[0007] a laser transmitter, providing an incident light beam;

[0008] a collimating lens, disposed on a transmission optical path of the incident light beam, for collimating the incident light beam into incident parallel light;

[0009] a first cemented prism, disposed on the transmission optical path of the incident parallel light, for reflecting the incident parallel light and emitting it along the optical axis;

[0010] a second cemented prism, disposed on the optical axis and used to change the transmission optical path of the recovered light beam;

[0011] a focusing lens, disposed on the transmission path of the recycled light beam whose transmission direction is changed by the second cemented prism, and used for focusing the recycled light beam onto the photosensitive surface of the photodetector;

[0012] a photoelectric detector, configured to receive the recovered light beam;

[0013] eyepiece; arranged on the optical axis;

[0014] The objective lens is arranged on the optical axis; the eyepiece, the second cemented prism, the first cemented prism and the objective lens are arranged in sequence along the direction in which the optical axis extends.

[0015] Preferably, the first bonded prism includes a first prism and a second prism in the shape of a prism, the cross-section of the first prism is an isosceles trapezoid, the cross-section of the second prism is a right-angled trapezoid, and the large end face of the first prism faces the objective lens; the large end face of the first prism intersects the optical axis perpendicularly, and the small end face of the first prism is perpendicular to the optical axis but does not intersect; the oblique side face of the first prism intersecting the optical axis is a first oblique face, and the other is a second oblique face, and the oblique side face of the second prism and the first oblique face are bonded to form a prism structure with a right-angled trapezoidal cross-section; the second bonded prism is arranged between the first bonded prism and the eyepiece.

[0016] Preferably, the laser emitter is arranged parallel to the optical axis on one side of the large end of the first prism, and the laser emitting end of the laser emitter faces the second inclined surface.

[0017] Preferably, the angle between the second inclined surface and the optical axis is 45°.

[0018] Preferably, the second glued prism includes a third prism and a fourth prism; the third prism is constructed with a third incident surface, a third reflection surface and a third transmission surface, the third incident surface is located on the side of the first glued prism facing the eyepiece, and the third incident surface and the optical axis intersect vertically; the third reflection surface and the third transmission surface are both located on the side of the third incident surface facing the eyepiece, the fourth prism includes a fourth exit surface, a fourth transmission surface and a fourth reflection surface, the fourth transmission surface and the third transmission surface are glued, the third reflection surface is used to reflect the recovered light beam to the fourth transmission surface and the third transmission surface, the fourth transmission surface and the third transmission surface are used to transmit the recovered light beam to the fourth reflection surface, and the fourth reflection surface is used to reflect the recovered light beam into a detection light beam along a direction parallel to the optical axis; the fourth exit surface is arranged on the transmission path of the detection light beam and is arranged perpendicular to the optical axis.

[0019] Preferably, a filter film is provided between the third transmission surface and the fourth transmission surface.

[0020] Preferably, it also includes a focusing lens fixing sleeve and a photodetector focus adjustment sleeve; the focusing lens is detachably arranged inside the focusing lens fixing sleeve, the photodetector focus adjustment sleeve and the focusing lens fixing sleeve are threadedly connected, the photodetector is fixed in the photodetector focus adjustment sleeve, and the distance between the focusing lens and the photodetector is adjusted by adjusting the depth of the threaded connection.

[0021] Preferably, it also includes a collimating lens sleeve and a laser emitter fixing sleeve, the laser emitter is fixedly arranged in the laser emitter fixing sleeve, the collimating lens is fixedly arranged in the collimating lens sleeve, a cylindrical space is provided in the laser emitter fixing sleeve, the collimating lens sleeve is slidably and rotatably arranged around its own axis in the cylindrical space, an adjustment channel extending along a first trajectory is provided on the circumferential wall surface of the cylindrical space, and the first trajectory has axial and radial components; an adjustment column is fixedly provided on the side wall of the collimating lens sleeve, the adjustment column extends into the adjustment channel, and the relative position of the collimating lens and the laser emitter is adjusted by adjusting the position of the adjustment column in the adjustment channel.

[0022] Preferably, the laser emitter is a semiconductor laser, and the laser emitter can emit infrared light with a wavelength of 905 nm.

[0023] Compared with the prior art, the utility model has achieved the following technical effects:

[0024] The recovered light beam and the emitted light beam as well as the eyepiece and the objective lens in the coaxial laser ranging aiming system provided by the utility model share the same optical axis, thus solving the problem in the prior art that aiming and ranging are not at the same point, and reducing the use error of gun aiming and ranging. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 An optical path diagram of a coaxial laser ranging and aiming system provided by an embodiment of the utility model;

[0027] Figure 2 A schematic structural diagram of a coaxial laser ranging and aiming system provided in an embodiment of the present utility model;

[0028] Figure 3 for Figure 2 Schematic diagram of the remaining structure after removing the eyepiece and objective lens;

[0029] Figure 4 Schematic diagram of the structure of the first cemented prism and the second cemented prism;

[0030] Figure 5 for Figure 4 Structural explosion diagram;

[0031] In the figure: 1-laser emitter; 2-collimating lens; 3-first cemented prism; 4-objective lens; 5-second cemented prism; 6-focusing lens; 7-photoelectric detector; 8-housing; 9-eyepiece; 11-incident light beam; 12-incident parallel light; 13-optical axis; 14-recovered light beam; 21-photoelectric detector focal length adjustment sleeve; 22-focusing lens fixing sleeve; 23-laser emitter fixing sleeve; 24-collimating lens sleeve; 31-first prism; 32-second prism; 33-third prism; 34-fourth prism; 35-prism group; 36-eyepiece group; 311-large end face; 312-first inclined surface; 313-second inclined surface; 314-small end face; 331-third incident surface; 332-third reflecting surface; 333-third transmission surface; 341-fourth transmission surface; 342-fourth emission surface; 343-fourth reflecting surface. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0034] To facilitate understanding, the following explanation is given.

[0035] In related technologies, laser ranging systems are classified by optical path into two types: off-axis and coaxial. The difference between coaxial and off-axis optical paths lies in whether the transmitting and receiving optical axes are coaxial. Current laser ranging gun sights all use off-axis optical path systems. In off-axis optical path systems for ranging and aiming, the transmitting and aiming systems are separate. The transmitting system consists of a laser transmitting module, a window lens, and a transmitting channel. The receiving system consists of an optical focusing lens, a filter, a receiving channel, and an avalanche diode. The laser module, consisting of a semiconductor laser diode, an optical collimating lens, and a copper sleeve, is responsible for emitting the collimated and shaped laser beam. The distance measurement and aiming off-axis optical path system described above uses a laser module to emit a collimated and shaped laser beam, typically 905nm or 940nm infrared light. After passing through air or other media, it hits the target. The laser light diffusely reflected by the target is collected by the optical lens of the receiving system and focused on the photosensitive surface of the photodetector. Because the received light not only contains the emitted beam, but also stray light from other bands, it is necessary to filter out the unwanted stray light through a filter to retain only the light of the required band. When the photodetector, also known as the avalanche tube, senses the photon, it generates an avalanche phenomenon, converting the optical signal into an electrical signal, which is transmitted to the computing terminal.

[0036] The following combination Figures 1 to 5 , describing the embodiments of the present utility model.

[0037] The utility model provides a coaxial laser ranging and aiming system, comprising: a laser emitter 1, a collimating lens 2, a first cemented prism 3, a second cemented prism 5, a focusing lens 6, a photoelectric detector 7, an eyepiece 9 and an objective lens 4;

[0038] The laser emitter 1 provides an incident light beam 11; the collimating lens 2 is arranged on the transmission light path of the incident light beam 11, and is used to collimate the incident light beam 11 into an incident parallel light 12; the first cemented prism 3 is arranged on the transmission light path of the incident parallel light 12, and is used to reflect the incident parallel light 12 and make it emit along the optical axis 13; the second cemented prism 5 is arranged on the optical axis 13 and is used to change the transmission light path of the recovered light beam 14; the focusing lens 6 is arranged on the transmission light path of the recovered light beam 14 whose transmission direction is changed by the second cemented prism 5; it is used to focus the recovered light beam 14 onto the photosensitive surface of the photodetector 7; the photodetector 7 is used to receive the recovered light beam 14; the eyepiece 9 is arranged on the optical axis 13; the objective lens 4 is arranged on the optical axis 13; the eyepiece 9, the second cemented prism 5, the first cemented prism 3 and the objective lens 4 are arranged in sequence along the direction in which the optical axis 13 extends.

[0039] Specifically, the first bonded prism 3 includes a prismatic first prism 31 and a second prism 32, the cross-section of the first prism 31 is an isosceles trapezoid, the cross-section of the second prism 32 is a right-angled trapezoid, and the large end face 311 of the first prism 31 faces the objective lens 4; the large end face 311 of the first prism 31 intersects the optical axis 13 perpendicularly, and the small end face 314 of the first prism 31 is perpendicular to the optical axis 13 but does not intersect; the oblique side surface of the first prism 31 intersecting with the optical axis 13 is the first oblique surface 312, and the other is the second oblique surface 313, and the oblique side surface of the second prism 32 and the first oblique surface 312 are bonded to form a prism structure with a right-angled trapezoidal cross-section; the second bonded prism 5 is arranged between the first bonded prism 3 and the eyepiece 9.

[0040] The second cemented prism 5 includes a third prism 33 and a fourth prism 34; the third prism 33 is constructed with a third incident surface 331, a third reflecting surface 332 and a third transmitting surface 333, the third incident surface 331 is located on the side of the first cemented prism 3 facing the eyepiece 9, and the third incident surface 331 and the optical axis 13 are perpendicularly intersected; the third reflecting surface 332 and the third transmitting surface 333 are both located on the side of the third incident surface 331 facing the eyepiece 9, and the fourth prism 34 includes a fourth emitting surface 342, a fourth transmitting surface 341 and a fourth reflecting surface Surface 343, the fourth transmission surface 341 and the third transmission surface 333 are glued together, the third reflection surface 332 is used to reflect the recovered light beam 14 to the fourth transmission surface 341 and the third transmission surface 333, the fourth transmission surface 341 and the third transmission surface 333 are used to transmit the recovered light beam 14 to the fourth reflection surface 343, and the fourth reflection surface 343 is used to reflect the recovered light beam 14 into a detection light beam along a direction parallel to the optical axis 13; the fourth emission surface 342 is set on the transmission path of the detection light beam and is perpendicular to the optical axis 13.

[0041] The recovered light beam 14 and the emitted light beam as well as the eyepiece 9 and the objective lens 4 in the coaxial laser ranging aiming system provided by the embodiment of the utility model share the same optical axis 13, thereby solving the problem in the prior art that aiming and ranging are not at the same point, and reducing the use error of gun aiming and ranging.

[0042] In some embodiments, the laser emitter 1 is disposed parallel to the optical axis 13 on one side of the large end of the first prism 31 , with the laser emitting end of the laser emitter 1 facing the second inclined surface 313 .

[0043] In some embodiments, the included angle between the second inclined surface 313 and the optical axis 13 is 45°.

[0044] In some embodiments, a filter film is disposed between the third transmission surface 333 and the fourth transmission surface 341 .

[0045] The filter film in this embodiment is used to filter visible light, and infrared light can pass through the filter film and be incident on the fourth transmission surface 341 .

[0046] In some embodiments, the embodiments of the present invention also include a focusing lens fixing sleeve 22 and a photodetector focus adjustment sleeve 21; the focusing lens 6 is detachably arranged inside the focusing lens fixing sleeve 22, the photodetector focus adjustment sleeve 21 and the focusing lens fixing sleeve 22 are threadedly connected, and the photodetector 7 is fixed in the photodetector focus adjustment sleeve 21, and the distance between the focusing lens 6 and the photodetector 7 is adjusted by adjusting the depth of the threaded connection.

[0047] This embodiment makes it easier to adjust the distance between the focusing lens 6 and the photodetector 7 .

[0048] In some embodiments, the embodiments of the present invention also include a collimating lens sleeve 24 and a laser emitter fixing sleeve 23, the laser emitter 1 is fixedly arranged in the laser emitter fixing sleeve 23, the collimating lens 2 is fixedly arranged in the collimating lens sleeve 24, a cylindrical space is provided in the laser emitter fixing sleeve 23, the collimating lens sleeve 24 can be slid and rotated around its own axis in the cylindrical space, and an adjustment channel extending along a first trajectory is provided on the circumferential wall surface of the cylindrical space, and the first trajectory has axial and radial components; an adjustment column is fixedly provided on the side wall of the collimating lens sleeve 24, and the adjustment column extends into the adjustment channel, and the relative position of the collimating lens 2 and the laser emitter 1 is adjusted by adjusting the position of the adjustment column in the adjustment channel.

[0049] This embodiment makes it easier to adjust the distance between the collimating lens 2 and the laser emitter 1. Figure 2 As shown, the collimating lens sleeve 24, the laser emitter fixing sleeve 23, the focusing lens fixing sleeve 22 and the photodetector focus adjustment sleeve 21 are all parallel to the optical axis 13, which can reduce the radial size of the aiming system.

[0050] In some embodiments, the laser emitter 1 is a semiconductor laser, and the laser emitter 1 can emit infrared light with a wavelength of 905 nm, a fast axis divergence angle of 24°, and a slow axis divergence angle of 6°.

[0051] In some embodiments, surfaces on both sides of the prism assembly 35 along the optical axis are perpendicular to the optical axis 13 .

[0052] Description: In this embodiment of the utility model, the laser transmitter 1, collimating lens 2, first cemented prism 3, and objective lens 4 together form the transmitting system, which emits a collimated and shaped laser beam with a wavelength of 905nm. The photodetector 7, focusing lens 6, second cemented prism 5, and objective lens 4 together form the receiving system, which receives the light diffusely reflected from the target and focuses it on the photodetector 7.

[0053] Here’s how it works:

[0054] The laser light emitted by the laser transmitter 1 undergoes preliminary collimation through the collimating lens 2, then enters the first cemented prism 3. After two reflections, it enters the objective lens 4, where it undergoes final collimation before being emitted. The emitted laser light is reflected by the surface to be measured, enters the objective lens 4, and then passes through the first cemented prism 3 before entering the second cemented prism 5. The second cemented prism is responsible for separating the visible light band from the infrared light band. The separated infrared light is reflected and enters the focusing lens 6, and is finally focused on the photodetector 7.

[0055] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A coaxial laser ranging and aiming system, characterized by: include: a laser transmitter, providing an incident light beam; a collimating lens, disposed on a transmission optical path of the incident light beam, for collimating the incident light beam into incident parallel light; a first cemented prism, disposed on a transmission optical path of the incident parallel light, for reflecting the incident parallel light to form an emission light beam emitted along an optical axis; a second cemented prism, disposed on the optical axis and used to change the transmission optical path of the recovered light beam; a focusing lens, disposed on the transmission path of the recycled light beam whose transmission direction is changed by the second cemented prism, and used for focusing the recycled light beam onto the photosensitive surface of the photodetector; a photoelectric detector, configured to receive the recovered light beam; eyepiece; arranged on the optical axis; The objective lens is arranged on the optical axis; the eyepiece, the second cemented prism, the first cemented prism and the objective lens are arranged in sequence along the direction in which the optical axis extends.

2. The coaxial laser ranging and aiming system according to claim 1, characterized in that: The first bonded prism includes a first prism and a second prism in the shape of a prism, the cross-section of the first prism is an isosceles trapezoid, the cross-section of the second prism is a right-angled trapezoid, and the large end face of the first prism faces the objective lens; the large end face of the first prism intersects the optical axis perpendicularly, and the small end face of the first prism is perpendicular to the optical axis but does not intersect; the oblique side face of the first prism intersecting with the optical axis is the first oblique face, and the other is the second oblique face, and the oblique side face of the second prism and the first oblique face are bonded to form a prism structure with a right-angled trapezoidal cross-section; the second bonded prism is arranged between the first bonded prism and the eyepiece.

3. The coaxial laser ranging and aiming system according to claim 2, characterized in that: The laser emitter is arranged parallel to the optical axis on one side of the large end of the first prism, and the laser emitting end of the laser emitter faces the second inclined surface.

4. The coaxial laser ranging and aiming system according to claim 3, characterized in that: The included angle between the second inclined surface and the optical axis is 45°.

5. The coaxial laser ranging and aiming system according to claim 3, characterized in that: The second glued prism includes a third prism and a fourth prism; the third prism is constructed with a third incident surface, a third reflection surface and a third transmission surface, the third incident surface is located on the side of the first glued prism facing the eyepiece, and the third incident surface and the optical axis are perpendicularly intersected; the third reflection surface and the third transmission surface are both located on the side of the third incident surface facing the eyepiece, the fourth prism includes a fourth exit surface, a fourth transmission surface and a fourth reflection surface, the fourth transmission surface and the third transmission surface are glued together, the third reflection surface is used to reflect the recovered light beam to the fourth transmission surface and the third transmission surface, the fourth transmission surface and the third transmission surface are used to transmit the recovered light beam to the fourth reflection surface, and the fourth reflection surface is used to reflect the recovered light beam into a detection light beam along a direction parallel to the optical axis; the fourth exit surface is arranged on the transmission path of the detection light beam and is arranged perpendicular to the optical axis.

6. The coaxial laser ranging and aiming system according to claim 5, characterized in that: A filter film is provided between the third transmission surface and the fourth transmission surface.

7. The coaxial laser ranging and aiming system according to claim 1, characterized in that: It also includes a focusing lens fixing sleeve and a photodetector focus adjustment sleeve; the focusing lens is detachably arranged inside the focusing lens fixing sleeve, the photodetector focus adjustment sleeve and the focusing lens fixing sleeve are threadedly connected, the photodetector is fixed in the photodetector focus adjustment sleeve, and the distance between the focusing lens and the photodetector is adjusted by adjusting the depth of the threaded connection.

8. The coaxial laser ranging and aiming system according to claim 1, characterized in that: It also includes a collimating lens sleeve and a laser emitter fixing sleeve, the laser emitter is fixedly arranged in the laser emitter fixing sleeve, the collimating lens is fixedly arranged in the collimating lens sleeve, a cylindrical space is provided in the laser emitter fixing sleeve, the collimating lens sleeve is slidably and rotatably arranged around its own axis in the cylindrical space, an adjustment channel extending along a first trajectory is provided on the circumferential wall surface of the cylindrical space, and the first trajectory has axial and radial components; an adjustment column is fixedly provided on the side wall of the collimating lens sleeve, the adjustment column extends into the adjustment channel, and the relative position of the collimating lens and the laser emitter is adjusted by adjusting the position of the adjustment column in the adjustment channel.

9. The coaxial laser ranging and aiming system according to claim 1, characterized in that: The laser emitter is a semiconductor laser, and the laser emitter can emit infrared light with a wavelength of 905 nm.

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