Coaxial laser ranging aiming system

Abstract

The invention 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, the recycling light beam, the emitting light beam, the eyepiece and the objective lens share the same optical axis, 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 invention relates to the technical field of aiming systems, and in particular to a coaxial laser ranging aiming system. Background Art

[0002] The laser rangefinder gun sight integrates the functions of a laser rangefinder and a scope. Before shooting, users can quickly and accurately obtain the target distance through the laser rangefinder, while the scope helps them accurately aim at the target. This workflow greatly simplifies the preparation work before shooting and improves shooting efficiency.

[0003] In existing rifle scopes with rangefinder, the transmitting system is usually independent and parallel to the optical axis of the aiming system, and the receiving system is embedded in the aiming system through prism reflection. The advantage of this is that the structure is relatively simple, but the disadvantage is that since the transmitting and aiming receiving axes are not on the same axis, the ranging position and the aiming position will be different during use. Summary of the invention

[0004] The purpose of the present invention 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 object, the present invention provides the following solutions:

[0006] The present invention provides a coaxial laser ranging and aiming system, comprising:

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

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

[0009] A first cemented prism is arranged on the transmission optical path of the incident parallel light, and is used to reflect the incident parallel light and emit 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 recycled light beam;

[0011] A focusing lens is arranged on the transmission optical path of the recycled light beam whose transmission direction is changed by the second cemented prism, and is used to focus the recycled light beam onto the photosensitive surface of the photodetector;

[0012] A photoelectric detector, used for receiving the recycled light beam;

[0013] An 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 at right angles, and the small end face of the first prism is perpendicular to the optical axis but does not intersect; the oblique side surface of the first prism intersecting with the optical axis is a first oblique surface, and the other is a second oblique surface, and the oblique side surface of the second prism and the first oblique surface 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 included 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 perpendicularly; 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 threaded connection depth.

[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 arranged 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 arranged on the circumferential wall surface of the cylindrical space, and the first trajectory has axial and radial components; an adjustment column is fixedly arranged 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 present invention 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 present invention 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 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 drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

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

[0027] Figure 2 A schematic diagram of the structure of a coaxial laser ranging and aiming system provided by an embodiment of the present invention;

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

[0029] Figure 4 is a schematic structural diagram of a first glued prism and a second glued prism;

[0030] Figure 5 for Figure 4 Exploded diagram of the structure;

[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 plane; 313-second inclined plane; 314-small end face; 331-third incident surface; 332-third reflection surface; 333-third transmission surface; 341-fourth transmission surface; 342-fourth emission surface; 343-fourth reflection 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 described embodiments 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 creative work 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 embodiments.

[0034] For ease of understanding, the following explanation is given.

[0035] In the related art, laser ranging systems are classified by optical path, and can be divided into transmitting and receiving off-axis optical paths and transmitting and receiving coaxial optical paths. The difference between coaxial optical paths and off-axis optical paths is whether the transmitting optical axis and the receiving optical axis are coaxial. The current laser ranging gun sights are all off-axis optical path systems. In the off-axis optical path system for ranging and aiming, the transmitting system and the aiming system are separate. The transmitting system is composed of a laser transmitting module, a window lens, a transmitting channel, etc. The receiving system is composed of an optical focusing lens, a filter, a receiving channel, an avalanche tube, etc. The laser module is a module composed of a semiconductor laser diode, an optical collimating lens and a copper sleeve, which is responsible for emitting the collimated and shaped laser beam. The distance measurement and aiming off-axis optical path system has a laser module that emits a collimated and shaped laser beam, usually 905nm or 940nm infrared light, which hits the target after passing through the air or other media. The laser diffusely reflected by the target will be collected by the optical lens of the receiving system and focused on the photosensitive surface of the photodetector. Because not only the emitted light beam is received, but also stray light of other bands, it is necessary to filter out other unnecessary stray light through a filter, and only retain the light of the required band. After the photodetector, that is, the avalanche tube senses the photon, an avalanche phenomenon will occur, converting the optical signal into an electrical signal and transmitting it to the computing terminal.

[0036] Combine the following Figures 1 to 5 , describing an embodiment of the present invention.

[0037] The present invention provides a coaxial laser ranging and aiming system, comprising: a laser transmitter 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] A laser transmitter 1 provides an incident light beam 11; a 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; a 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; a second cemented prism 5 is arranged on the optical axis 13 and is used to change the transmission light path of a recovered light beam 14; a 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; and is used to focus the recovered light beam 14 onto a photosensitive surface of a photodetector 7; the photodetector 7 is used to receive the recovered light beam 14; an eyepiece 9 is arranged on the optical axis 13; an 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 glued 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 is perpendicular to the optical axis 13, 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 glued to form a prism structure with a right-angled trapezoidal cross-section; the second glued prism 5 is arranged between the first glued 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 reflection surface 332 and a third transmission 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 reflection surface 332 and the third transmission 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 emission surface 342, a fourth transmission surface 341 and a fourth reflection surface The fourth transmission 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 present invention 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 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 , and the laser emitting end of the laser emitter 1 faces 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 further include a collimating lens sleeve 24 and a laser emitter fixing sleeve 23, the laser emitter 1 is fixedly disposed in the laser emitter fixing sleeve 23, the collimating lens 2 is fixedly disposed in the collimating lens sleeve 24, a cylindrical space is disposed in the laser emitter fixing sleeve 23, the collimating lens sleeve 24 can be slidably and rotated around its own axis in the cylindrical space, an adjustment channel extending along a first trajectory is disposed on the circumferential wall surface of the cylindrical space, and the first trajectory has axial and radial components; an adjustment column is fixedly disposed on the side wall of the collimating lens sleeve 24, 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 transmitter 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 of the prism set 35 on both sides along the optical axis direction are perpendicular to the optical axis 13 .

[0052] Description: In the embodiment of the present invention, the laser transmitter 1, the collimating lens 2, the first cemented prism 3 and the objective lens 4 together constitute the transmitting system, which emits a beam of laser light after collimation and shaping, and the laser wavelength is 905nm infrared light. The photodetector 7, the focusing lens 6, the second cemented prism 5 and the objective lens 4 together constitute the receiving system, which is used to receive the light diffusely reflected by the target and converge and focus on the photodetector 7.

[0053] Here’s how it works:

[0054] The laser emitted by the laser emitter 1 undergoes a preliminary collimation through the collimating lens 2, then enters the first cemented prism 3, and enters the objective lens 4 after two reflections, and is finally collimated by the objective lens 4 before being emitted. The emitted laser enters the objective lens 4 after being reflected by the surface to be measured, and enters the second cemented prism 5 after passing through the first cemented prism 3. The second cemented prism has the function of separating the visible light band and the infrared light band. The separated infrared light enters the focusing lens 6 after reflection, 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 used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A coaxial laser ranging and aiming system, characterized in that: include: A laser transmitter, providing an incident light beam; A collimating lens, arranged on a transmission optical path of the incident light beam, for collimating the incident light beam into incident parallel light; A first cemented prism is arranged on the transmission optical path of the incident parallel light and is used to reflect the incident parallel light to form an emission light beam emitted along the optical axis; A second cemented prism, disposed on the optical axis and used to change the transmission optical path of the recycled light beam; A focusing lens, arranged on the transmission optical 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, used for receiving the recycled light beam; An 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 surface of the first prism intersecting the optical axis is a first oblique surface, and the other is a second oblique surface, and the oblique side surface of the second prism and the first oblique surface 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, 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 arranged 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 threaded connection depth.

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 arranged 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 arranged on the circumferential wall surface of the cylindrical space, and the first trajectory has axial and radial components; an adjustment column is fixedly arranged 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 905nm.

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