Ranging telescope
By adopting coaxial dual-wavelength semiconductor laser and dual-barrel assembly mode in the range-finding telescope, the problem of inability to effectively calibrate long-distance targets and low measurement accuracy in the prior art is solved, and high-precision long-distance measurement is achieved.
Patent Information
- Application Number
- CN202421022016.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-05-09
AI Technical Summary
The existing range-finding telescope cannot perform effective calibration when measuring long-distance targets, and the optical paths emitted and received by lasers share lens components, which affects the divergence angle and focus effect during focus and reduces the measurement accuracy.
A coaxial dual-wavelength semiconductor laser is used to emit infrared lasers through the first laser chip for target calibration, and a distance measurement is performed through the second laser chip for near-infrared lasers. At the same time, the dual-lens barrel assembly mode is adopted to independently set the laser emission and reception components to avoid sharing of the optical path and ensure that the focus does not affect the laser emission and reception effect.
Effective calibration and high-precision distance measurement of long-distance targets are achieved, and the measurement distance and accuracy of the range-finding telescope are improved.
Smart Images
Figure CN222580251U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of distance measurement, in particular to a distance measuring telescope. Background Art
[0002] A laser rangefinder is an instrument that uses laser parameters to measure the distance to a target. Based on the distance measurement method, it can be divided into phase rangefinders and pulse rangefinders, and its measurement range is 3.5 to 5,000 meters. A ranging telescope, on the other hand, is a laser rangefinder that integrates a ranging system with a telescope system, providing both measurement and observation capabilities.
[0003] The ranging telescope mainly includes a laser emitting assembly for emitting laser, a lens assembly for transmitting and reflecting laser, and a laser receiving assembly for receiving the reflected laser.
[0004] The laser emitting elements of the ranging telescopes in the existing technology all use single-wavelength near-infrared laser diodes, that is, they can only emit infrared light, so they cannot calibrate targets to be measured at long distances. At the same time, the laser collimation optical path, the telescopic optical path, and the laser receiving optical path share the objective lens and focusing lens in the lens assembly, and the focusing lens in the lens assembly is also located in the optical path of the laser emitting assembly and the laser receiving assembly. In this way, focusing will inevitably affect the divergence angle of the laser emission and the focusing effect of the laser reception, resulting in a decrease in the measurement distance and ranging accuracy of the ranging telescope. Utility Model Content
[0005] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the purpose of the present invention is to provide a ranging telescope that can calibrate a target to be measured at a long distance and has a long measurement distance and high measurement accuracy.
[0006] The utility model provides a ranging telescope, which comprises:
[0007] The first lens barrel assembly comprises a first objective lens group, a first prism group, a first focusing lens, a first display screen, a first eyepiece group and a laser emitting assembly for emitting laser light, which are arranged in sequence and spaced apart from each other; the first focusing lens can be moved along the optical axis direction of the first lens barrel assembly, and the laser light emitted by the laser emitting assembly is emitted outward through the first prism group and the first objective lens group in sequence; the laser emitting assembly comprises a coaxial dual-wavelength semiconductor laser, and the coaxial dual-wavelength semiconductor laser comprises a first laser chip, a second laser chip, a first optical lens, a second optical lens and a dichroic mirror; the first laser chip and the second laser chip respectively emit emits a first laser and a second laser, and both the first laser and the second laser are asymmetric divergent beams, the wavelength range of the first laser is smaller than the wavelength range of the second laser, the first laser chip and the second laser chip are respectively located on opposite sides of the dichroic mirror, the first optical lens is located between the first laser chip and the dichroic mirror, the second optical lens is located between the second laser chip and the dichroic mirror, the center position of the dichroic mirror is located at the intersection of the optical axes of the first laser chip and the second laser chip, and the axial direction of the dichroic mirror coincides with the angle bisector of the optical axes of the first laser chip and the second laser chip;
[0008] A second lens barrel assembly, the second lens barrel assembly includes a second objective lens group, a second prism group, a second focusing mirror, a second display screen, a second eyepiece group and a laser receiving assembly for receiving laser light, which are arranged in sequence and spaced apart from each other; the second focusing mirror can be moved along the optical axis direction of the second lens barrel assembly, and the laser light received by the laser emitting assembly is sequentially emitted through the second objective lens group and the second prism group; the laser receiving assembly includes a photoelectric sensor, and the sensitive wavelength of the photoelectric sensor is at least between the minimum wavelength of the first laser light and the maximum wavelength of the second laser light.
[0009] Preferably, the side of the dichroic mirror close to the first laser chip is coated with an antireflection film, and the side of the dichroic mirror close to the second laser chip is coated with a color separation film; the wavelength range of the first laser is 620~650nm, and the wavelength range of the second laser is 800~1000nm; the sensitive wavelength of the photoelectric sensor is 400~1000nm.
[0010] Preferably, the first objective lens group includes a first cemented lens and a first single lens, which are arranged in sequence from away from the first prism group to close to the first prism group and are spaced apart from each other; the second objective lens group has the same structure and arrangement as the first objective lens group.
[0011] Preferably, the first prism group includes glued prisms and single prisms arranged in sequence and spaced apart from each other in a direction perpendicular to the optical axis of the first lens barrel assembly, the glued prism is formed by gluing a half pentagonal prism and a compensation prism, the half pentagonal prism is located between the single prism and the compensation prism, and the single prism is located in the beam range of the laser emitted by the laser emitting assembly; the second prism group and the first prism group have the same structure and arrangement.
[0012] Preferably, the bonding surfaces of the half pentagonal prism and the compensation prism are respectively coated with a dichroic film, and the remaining surfaces of the half pentagonal prism and the compensation prism are respectively coated with a projection-enhancing film.
[0013] Preferably, the single prism is any one of a roof prism, an Abbe-Koenig prism and a Porro prism.
[0014] Preferably, the first focusing lens is a single lens or a cemented lens; the second focusing lens has the same structure as the first focusing lens.
[0015] Preferably, the first eyepiece group includes a second cemented lens and a second single lens arranged in sequence from close to the first display screen to away from the first display screen; the second eyepiece group and the first eyepiece group have the same structure and arrangement.
[0016] Preferably, the laser emitting component also includes a first focusing lens, which is arranged between the coaxial dual-wavelength semiconductor laser and the first prism group; the laser receiving component also includes a second focusing lens, which is arranged between the photoelectric sensor and the second prism group.
[0017] Preferably, the photosensor is any one of a silicon avalanche photodiode, a silicon avalanche photodiode array, and an indium gallium arsenide avalanche photodiode.
[0018] The above solution of the utility model includes at least the following beneficial effects:
[0019] 1. By limiting the first laser emitted by the first laser chip and the second laser emitted by the second laser chip to be asymmetric divergent beams, the wavelength range of the first laser is smaller than the wavelength range of the second laser; at the same time, the sensitive wavelength of the photoelectric sensor is limited to at least between the minimum wavelength of the first laser and the maximum wavelength of the second laser; and coordinating the focusing of the first focusing lens and the second focusing lens, the target to be measured can be clearly seen, and the infrared laser emitted by the first laser chip is used to calibrate the target to be measured at a long distance, and the near-infrared laser emitted by the second laser is used to measure the distance.
[0020] 2. By adopting a double-lens barrel assembly mode, and limiting the laser emitting assembly to be set in the first lens barrel assembly, limiting the laser receiving assembly to be set in the second lens barrel assembly, and also limiting the laser emitted by the laser emitting assembly to be emitted outward through the first prism group and the first objective lens group in sequence, and limiting the laser received by the laser emitting assembly to be emitted through the second objective lens group and the second prism group in sequence, in this way, the laser emitting effect and the laser receiving effect will not be affected when the first focusing lens and the second focusing lens are focusing, so as to improve the measuring distance and measurement accuracy of the ranging telescope.
[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] 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 or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.
[0023] Figure 1 This is a schematic diagram of the overall structure of a ranging telescope provided in an embodiment of the present utility model;
[0024] Figure 2 This is a schematic structural diagram of a first prism group in a ranging telescope provided in an embodiment of the present utility model;
[0025] Figure 3 The utility model is a schematic structural diagram of a coaxial dual-wavelength semiconductor laser in a ranging telescope provided in an embodiment of the present invention.
[0026] Explanation of the accompanying drawings: 100, first lens barrel assembly; 200, second lens barrel assembly; 1, first objective lens group; 11, first cemented lens; 12, first single lens; 2, first prism group; 21, cemented prism; 211, half-penta prism; 212, compensation prism; 22, single prism; 23, lens; 3, first focusing mirror; 4, first display screen; 5, first eyepiece group; 51, second cemented lens; 52, second single lens; 6, laser emitting assembly; 61, coaxial dual-wavelength semiconductor laser; 611, first laser chip; 612, second laser chip; 613, first optical lens; 614, second optical lens; 615, dichroic mirror; 62, first focusing lens; 7, laser receiving assembly; 71, photoelectric sensor; 72, second focusing lens.
[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0028] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.
[0031] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0033] Please refer to the attached Figure 1 To the attached Figure 3 A ranging telescope according to an embodiment of the present invention is described in detail, which includes a first lens barrel assembly 100 and a second lens barrel assembly 200.
[0034] Specifically, the first lens barrel assembly 100 includes a first objective lens group 1, a first prism group 2, a first focusing lens 3, a first display screen 4, a first eyepiece group 5, and a laser emitting assembly 6 for emitting laser light, which are arranged in sequence and spaced apart from each other; the second lens barrel assembly 200 includes a second objective lens group, a second prism group, a second focusing lens, a second display screen, a second eyepiece group, and a laser receiving assembly 7 for receiving laser light, which are arranged in sequence and spaced apart from each other.
[0035] Among them, the first focusing lens 3 can be moved along the optical axis direction of the first lens barrel assembly 100, and the laser emitted by the laser emitting assembly 6 is emitted outward through the first prism group 2 and the first objective lens group 1 in sequence; the second focusing lens can be moved along the optical axis direction of the second lens barrel assembly 200, and the laser received by the laser emitting assembly 6 is emitted through the second objective lens group and the second prism group in sequence.
[0036] In this embodiment, the first objective lens group 1 includes a first cemented lens 11 and a first single lens 12, which are arranged in sequence and spaced apart from each other in a direction away from the first prism group 2 and toward the first prism group 2. Of course, depending on actual needs, the first cemented lens 11 and the first single lens 12 can be designed as a single lens or multiple lenses.
[0037] In this embodiment, the first prism group 2 includes a glued prism 21 and a single prism 22 arranged in sequence and spaced apart from each other in a direction perpendicular to the optical axis of the first lens barrel assembly 100. The glued prism 21 is formed by gluing a half pentagonal prism 211 and a compensation prism 212. The half pentagonal prism 211 is located between the single prism 22 and the compensation prism 212. The single prism 22 is located in the beam range of the laser emitted by the laser emitting assembly 6.
[0038] The bonding surfaces of the half-penta prism 211 and the compensating prism 212 are each coated with a dichroic film, while the remaining surfaces of the half-penta prism 211 and the compensating prism 212 are each coated with a projection enhancement film. The dichroic film is semi-transmissive and semi-reflective for red wavelengths, transmissive for near-infrared wavelengths, and reflective for other visible wavelengths.
[0039] The single prism 22 is any one of a roof prism, an Abbe-Koenig prism, and a Porro prism.
[0040] In addition, the first prism group 2 can also be designed with a separate lens 23 located between the cemented prism 21 and the first focusing lens 3.
[0041] In this embodiment, the first focusing lens 3 is a single lens or a cemented lens, and is used to move in the first lens barrel assembly 100 to clearly image objects at different distances.
[0042] In this embodiment, the first display screen 4 and the second display screen are both used to display the crosshairs and distance measurement information.
[0043] In this embodiment, the first eyepiece assembly 5 includes a second cemented lens 51 and a second single lens 52 arranged in sequence from close to the first display screen 4 to away from the first display screen 4. Of course, according to actual needs, the second cemented lens 51 and the second single lens 52 can be designed as a single lens or multiple lenses.
[0044] In this embodiment, the second objective lens assembly has the same structure and arrangement as the first objective lens assembly 1, i.e., the second objective lens assembly also includes a second cemented lens and a first single lens. The second cemented lens and the first single lens in the second objective lens assembly are sequentially arranged from away from the second prism assembly toward closer to the second prism assembly, and are spaced apart from each other. Of course, depending on actual needs, the first cemented lens and the first single lens in the second objective lens assembly can each be designed as a single lens or multiple lenses.
[0045] In this embodiment, the second prism group has the same structure and arrangement as the first prism group 2, that is, the second prism group also includes glued prisms and single prisms, and the glued prisms and single prisms in the second prism group are arranged in sequence along a direction perpendicular to the optical axis of the second lens barrel assembly and are spaced apart from each other, and the single prism is located in the light beam range of the laser received by the laser receiving assembly; at the same time, the glued surfaces of the half-penta prism and the compensation prism in the second prism group are respectively coated with a color separation film, and the remaining surfaces of the half-penta prism and the compensation prism in the second prism group are respectively coated with a projection-enhancing film; the single prism in the second prism group is any one of a roof prism, an Abbe-Koenig prism and a Porro prism; in addition, the second prism group can also be separately designed with a lens located between the glued prism in the second prism group and the second focusing lens.
[0046] In this embodiment, the second focusing lens has the same structure as the first focusing lens 3 , that is, the second focusing lens is also a single lens or a cemented lens.
[0047] In this embodiment, the second eyepiece assembly has the same structure and arrangement as the first eyepiece assembly 5, i.e., the second eyepiece assembly also includes a second cemented lens and a second single lens, and the second cemented lens and the second single lens in the second eyepiece assembly are arranged sequentially from closer to the second display screen to farther away from the second display screen. Of course, depending on actual needs, the second cemented lens and the second single lens in the second eyepiece assembly can be designed as a single lens or multiple lenses.
[0048] Specifically, the laser emitting assembly 6 includes a coaxial dual-wavelength semiconductor laser 61, which includes a first laser chip 611, a second laser chip 612, a first optical lens 613, a second optical lens 614, and a dichroic mirror 615; the first laser chip 611 and the second laser chip 612 emit a first laser and a second laser respectively, and the first laser and the second laser are both asymmetric divergent beams, the wavelength range of the first laser is smaller than the wavelength range of the second laser, and the first laser chip 611 emits a first laser and a second laser respectively. The first laser chip 611 and the second laser chip 612 are respectively located on opposite sides of the dichroic mirror 615. The first optical lens 613 is located between the first laser chip 611 and the dichroic mirror 615. The second optical lens 614 is located between the second laser chip 612 and the dichroic mirror 615. The center of the dichroic mirror 615 is located at the intersection of the optical axes of the first laser chip 611 and the second laser chip 612. The axial direction of the dichroic mirror 615 coincides with the angular bisector of the optical axes of the first laser chip 611 and the second laser chip 612.
[0049] In this embodiment, the wavelength range of the first laser is 620-650 nm (red light), and the wavelength range of the second laser is 800-1000 nm (near infrared light).
[0050] The first laser chip 611 and the second laser chip 612 have different optical parameters. Therefore, a first optical lens 613 and a second optical lens 614 are respectively designed at the front ends of the first laser chip 611 and the second laser chip 612 to collimate the light beams emitted by them in the fast axis and slow axis directions. The first optical lens 613 and the second optical lens 614 can both be cylindrical lenses, aspherical lenses, or other collimating lenses. The design parameters depend on the specifications of the first laser chip 611 and the second laser chip 612.
[0051] The first laser core and the second laser chip 612 are designed to be as close to the dichroic mirror 615 as possible to reduce the overall size of the package.
[0052] The red light emitted by the first laser chip 611 is collimated by the first optical lens 613 and then emitted through the dichroic mirror 615; the near-infrared light emitted by the second laser is collimated by the second optical lens 614 and then emitted through the dichroic mirror 615; when the red light and the near-infrared light pass through the dichroic mirror 615, they form a combined beam and are emitted along the optical axis. Then, they pass through the first objective lens group 1 and are collimated again, becoming a laser beam with an extremely small divergence angle that is emitted outward.
[0053] In this embodiment, the side of the dichroic mirror 615 closest to the first laser chip 611 is coated with an antireflection coating, while the side of the dichroic mirror 615 closest to the second laser chip 612 is coated with a dichroic coating. The dichroic coating is transmissive to the wavelength of the first laser chip 611 and anti-reflective to the wavelength of the second laser chip 612, with the transmittance and reflectance set to be as high as possible.
[0054] Specifically, the laser receiving component 7 includes a photoelectric sensor 71, the sensitive wavelength of the photoelectric sensor 71 is at least between the minimum wavelength of the first laser and the maximum wavelength of the second laser; the photoelectric sensor 71 is any one of a silicon avalanche photodiode (silicon APD), a silicon avalanche photodiode array (silicon APD array) and an indium gallium arsenide avalanche photodiode (InGaAs APD).
[0055] In this embodiment, the sensitive wavelength of the photoelectric sensor 71 is 400-1000 nm.
[0056] In this embodiment, the laser emitting component 6 also includes a first focusing lens 62, which is arranged between the coaxial dual-wavelength semiconductor laser 61 and the first prism group 2; the laser receiving component 7 also includes a second focusing lens 72, which is arranged between the photoelectric sensor 71 and the second prism group.
[0057] An example scenario of the ranging telescope in this embodiment is as follows: observing the target to be measured through the eyepiece assembly in the first lens barrel assembly 100 and the second lens barrel assembly 200, and adjusting the positions of the focusing lenses in the first lens barrel assembly 100 and the second lens barrel assembly 200 until the target to be measured can be clearly seen. At this time, the first laser chip 611 emits a red laser to indicate the target for confirmation, and the second laser chip 612 emits a near-infrared laser for ranging. The near-infrared laser produces diffuse reflection on the surface of the target to be measured, and the reflected laser beam is received by the laser receiving assembly 7, and the signal is transmitted to the analysis chip. After analysis, the ranging information is displayed on the display screen.
[0058] The ranging telescope in this embodiment has the following beneficial effects:
[0059] 1. By limiting the first laser emitted by the first laser chip 611 and the second laser emitted by the second laser chip 612 to be asymmetric divergent beams, the wavelength range of the first laser is smaller than the wavelength range of the second laser, specifically, the wavelength range of the first laser is limited to 620-650nm, and the wavelength range of the second laser is limited to 800-1000nm; at the same time, the sensitive wavelength of the photoelectric sensor 71 is limited to at least between the minimum wavelength of the first laser and the maximum wavelength of the second laser, specifically, the sensitive wavelength of the photoelectric sensor 71 is limited to 400-1000nm; and the focusing of the first focusing lens 3 and the second focusing lens is coordinated, so that the target to be measured can be clearly seen, and the infrared laser emitted by the first laser chip 611 is used to calibrate the long-distance target to be measured, and the near-infrared laser emitted by the second laser is used to measure the distance.
[0060] 2. By adopting a double-lens barrel assembly mode, and limiting the laser emitting assembly 6 to be set in the first lens barrel assembly 100, limiting the laser receiving assembly 7 to be set in the second lens barrel assembly 200, and further limiting the laser emitted by the laser emitting assembly 6 to be emitted outward through the first prism group 2 and the first objective lens group 1 in sequence, and limiting the laser received by the laser emitting assembly 6 to be injected through the second objective lens group and the second prism group in sequence, in this way, the laser emitting effect and the laser receiving effect will not be affected when the first focusing lens 3 and the second focusing lens are focusing, so as to improve the measuring distance and measurement accuracy of the ranging telescope.
[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.
[0062] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A ranging telescope, characterized in that: The ranging telescope comprises: A first lens barrel assembly, the first lens barrel assembly includes a first objective lens group, a first prism group, a first focusing lens, a first display screen, a first eyepiece group and a laser emitting assembly for emitting lasers, which are arranged in sequence and spaced apart from each other; the first focusing lens can move along the optical axis direction of the first lens barrel assembly, and the laser emitted by the laser emitting assembly is emitted outward through the first prism group and the first objective lens group in sequence; the laser emitting assembly includes a coaxial dual-wavelength semiconductor laser, and the coaxial dual-wavelength semiconductor laser includes a first laser chip, a second laser chip, a first optical lens, a second optical lens and a dichroic mirror; the first laser chip and the second laser chip emit emitting a first laser and a second laser, and both the first laser and the second laser are asymmetric divergent beams, the wavelength range of the first laser is smaller than the wavelength range of the second laser, the first laser chip and the second laser chip are respectively located on opposite sides of the dichroic mirror, the first optical lens is located between the first laser chip and the dichroic mirror, the second optical lens is located between the second laser chip and the dichroic mirror, the center position of the dichroic mirror is located at the intersection of the optical axes of the first laser chip and the second laser chip, and the axial direction of the dichroic mirror coincides with the angular bisector of the optical axes of the first laser chip and the second laser chip; A second lens barrel assembly, the second lens barrel assembly includes a second objective lens group, a second prism group, a second focusing lens, a second display screen, a second eyepiece group and a laser receiving assembly for receiving laser light, which are arranged in sequence and spaced apart from each other; the second focusing lens can move along the optical axis direction of the second lens barrel assembly, and the laser light received by the laser emitting assembly is sequentially injected through the second objective lens group and the second prism group; the laser receiving assembly includes a photoelectric sensor, and the sensitive wavelength of the photoelectric sensor is at least between the minimum wavelength of the first laser light and the maximum wavelength of the second laser light.
2. The ranging telescope according to claim 1, characterized in that: The side of the dichroic mirror close to the first laser chip is coated with an anti-reflection film, and the side of the dichroic mirror close to the second laser chip is coated with a color separation film; the wavelength range of the first laser is 620 to 650 nm, and the wavelength range of the second laser is 800 to 1000 nm; the sensitive wavelength of the photoelectric sensor is 400 to 1000 nm.
3. The ranging telescope according to claim 1, characterized in that: The first objective lens group includes a first cemented lens and a first single lens which are sequentially arranged from away from the first prism group to close to the first prism group and spaced apart from each other; the second objective lens group has the same structure and arrangement as the first objective lens group.
4. The ranging telescope according to claim 1, characterized in that: The first prism group includes glued prisms and single prisms which are arranged in sequence and spaced apart from each other in a direction perpendicular to the optical axis of the first lens barrel assembly. The glued prism is formed by gluing a half pentagonal prism and a compensation prism. The half pentagonal prism is located between the single prism and the compensation prism. The single prism is located within the beam range of the laser emitted by the laser emitting assembly. The second prism group has the same structure and arrangement as the first prism group.
5. The ranging telescope according to claim 4, characterized in that: The bonding surfaces of the semi-pentagonal prism and the compensation prism are respectively coated with a color separation film, and the remaining surfaces of the semi-pentagonal prism and the compensation prism are respectively coated with a projection enhancement film.
6. The ranging telescope according to claim 4 or 5, characterized in that: The single prism is any one of a roof prism, an Abbe-Koenig prism and a Porro prism.
7. The ranging telescope according to claim 1, characterized in that: The first focusing lens is a single lens or a cemented lens; the second focusing lens has the same structure as the first focusing lens.
8. The ranging telescope according to claim 1, characterized in that: The first eyepiece group includes a second cemented lens and a second single lens arranged in sequence from close to the first display screen to away from the first display screen; the second eyepiece group has the same structure and arrangement as the first eyepiece group.
9. The ranging telescope according to claim 1, characterized in that: The laser emitting component also includes a first focusing lens, which is arranged between the coaxial dual-wavelength semiconductor laser and the first prism group; the laser receiving component also includes a second focusing lens, which is arranged between the photoelectric sensor and the second prism group.
10. The ranging telescope according to claim 1, characterized in that: The photoelectric sensor is any one of a silicon avalanche photodiode, a silicon avalanche photodiode array and an indium gallium arsenide avalanche photodiode.