Distance measuring device

Abstract

The utility model discloses a distance measuring device, and the device comprises a first telescoping assembly which forms a first optical path for human eye telescoping; a second telescoping assembly which forms a second optical path used for human eye telescoping; the light source assembly is configured to generate dual-wavelength combined laser, and the dual-wavelength combined laser is emitted through a first light path; the first distance measuring assembly is configured to receive first dual-wavelength echo laser which is reflected by the dual-wavelength combined laser through a target and passes through a first light path, and measure a first distance of the target through a phase method; and the second distance measuring assembly is configured to receive second dual-wavelength echo laser which is reflected by the dual-wavelength combined laser through the target and passes through a second light path, and measure a second distance of the target through a time flight method. In this way, the distance measurement precision can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of telescopic ranging technology, in particular to a ranging device. BACKGROUND

[0002] Binoculars, also known as binocular telescope, is a telescope composed of two single telescopes in parallel. The distance between the two eyepieces can be adjusted to allow both eyes to observe at the same time, thereby obtaining a stereoscopic effect.

[0003] The current binocular telescope generally carries a ranging system, but there are many current ranging methods. Due to the small size and compact structure of the binocular telescope, only one ranging method can be selected, resulting in low ranging accuracy. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a ranging device that can improve ranging accuracy.

[0005] The present application provides a ranging device, which comprises: a first telescopic component, the first telescopic component forming a first light path for human eye telescoping; a second telescopic component, the second telescopic component forming a second light path for human eye telescoping; a light source component, the light source component being configured to generate double-wavelength combined laser, the double-wavelength combined laser being emitted via the first light path; a first ranging component, the first ranging component being configured to receive double-wavelength combined laser reflected by a target and first double-wavelength echo laser via the first light path, and measure a first distance of the target by phase method; and a second ranging component, the second ranging component being configured to receive double-wavelength combined laser reflected by the target and second double-wavelength echo laser via the second light path, and measure a second distance of the target by time flight method.

[0006] In an embodiment, the ranging device further comprises a first optical component, the first optical component being disposed on an exit light path of the light source component and on an incident light path of the first ranging component; the first optical component being configured to change the light path of the double-wavelength combined laser so that the double-wavelength combined laser is emitted via the first light path; and the first optical component being configured to change the light path of the first double-wavelength echo laser so that the first ranging component receives the first double-wavelength echo laser.

[0007] In an embodiment, the first optical component comprises: a first mirror disposed outside the first light path, the first mirror comprising a through hole; a first lens disposed outside the first light path; and a first prism disposed on the first light path; wherein the double-wavelength combined laser generated by the light source component is turned to the first light path via the through hole of the first mirror, the first lens, and the first prism; and wherein the first double-wavelength echo laser is turned by the first prism, emitted via the first lens, and reflected by the first mirror to be received by the first ranging component.

[0008] In an embodiment, the first optical assembly further comprises a second mirror disposed outside the first light path; wherein the dual-wavelength combined laser generated by the light source assembly is turned to the first light path via the through hole of the first mirror, reflected by the second mirror, via the first lens, and turned by the first prism; wherein the first dual-wavelength return laser is turned by the first prism, via the first lens, reflected by the second mirror, and reflected by the first mirror to be received by the first ranging assembly.

[0009] In an embodiment, the first telescopic assembly comprises a first ocular lens, a first focusing mirror, and a first collimating mirror group disposed in sequence along the first optical axis, and the first prism is disposed between the first focusing mirror and the first collimating mirror group.

[0010] In an embodiment, the light source assembly comprises a first laser, a second laser, a combining mirror, and a second lens, the laser generated by the first laser and the laser generated by the second laser are combined by the combining mirror to form a dual-wavelength combined laser, and the dual-wavelength combined laser is emitted via the second lens.

[0011] In an embodiment, the first ranging assembly comprises a first detector, a filter, a conical barrel, and a diaphragm, the first dual-wavelength return laser is received by the first detector in sequence via the filter, the conical barrel, and the diaphragm.

[0012] In an embodiment, the ranging device further comprises a second optical assembly disposed on the incident light path of the second ranging assembly, and the second optical assembly is configured to change the light path of the second dual-wavelength return laser so that the second ranging assembly receives the second dual-wavelength return laser.

[0013] In an embodiment, the second optical assembly comprises a second prism disposed on the second light path and a third lens disposed outside the second light path; wherein the second dual-wavelength return laser is turned by the second prism and via the third lens to be received by the second ranging assembly.

[0014] In an embodiment, the second telescopic assembly comprises a second ocular lens, a second focusing mirror, and a second collimating mirror group disposed in sequence along the second optical axis, and the second prism is disposed between the second focusing mirror and the second collimating mirror group.

[0015] The ranging device provided in the application comprises: a first telescopic assembly, which forms a first light path for human eye telescoping; a second telescopic assembly, which forms a second light path for human eye telescoping; a light source assembly, which is configured to generate double-wavelength combined laser, the double-wavelength combined laser is emitted via the first light path; a first ranging assembly, which is configured to receive the first double-wavelength echo laser of the double-wavelength combined laser reflected by the target via the first light path, and measure the first distance of the target by phase method; and a second ranging assembly, which is configured to receive the second double-wavelength echo laser of the double-wavelength combined laser reflected by the target via the second light path, and measure the second distance of the target by time flight method. Specifically, the two telescopic light paths of the binocular telescope are utilized, the first light path is utilized to emit the double-wavelength combined laser, then the first double-wavelength echo laser and the second double-wavelength echo laser of the double-wavelength combined laser reflected by the target are received via the first light path and the second light path respectively, the first double-wavelength echo laser and the second double-wavelength echo laser are complementary interference, then the first distance and the second distance are obtained by the first ranging assembly and the second ranging assembly respectively by different ranging principles. In the above manner, on the one hand, the two telescopic light paths of the binocular telescope are utilized, without increasing the volume of the ranging device, only the optical elements, the light source assembly, the first ranging assembly and the second ranging assembly need to be reasonably arranged, on the other hand, the first distance and the second distance are obtained by different ranging principles, which can make the ranging result more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0017] Figure 1 is a structural schematic diagram of the first embodiment of the ranging device provided in the application;

[0018] Figure 2 is Figure 1 is a schematic diagram of another light path;

[0019] Figure 3 is a regional schematic diagram of the first lens 63 in an embodiment;

[0020] Figure 4 is a partial component schematic diagram of the laser receiving system of the phase method;

[0021] Figure 5 is a schematic diagram of the double-mode ranging process in an embodiment;

[0022] Figure 6 is a structural schematic diagram of a second embodiment of the ranging device provided in the present application;

[0023] Figure 7 is Figure 6 is a corresponding another optical path schematic diagram;

[0024] Figure 8 is a structural schematic diagram of a third embodiment of the ranging device provided in the present application. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described in the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0028] The use of "adapted to" or "configured to" in the present application means open and inclusive language that does not exclude devices adapted to or configured to perform additional tasks or steps. In addition, the use of "based on" means open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values can be based on additional conditions or values beyond those stated in practice.

[0029] In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation described as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. The following description is presented to enable any person skilled in the art to make and use the application. Details are set forth in the following description for purpose of explanation. It should be appreciated that one of ordinary skill in the art will readily recognize that the application can be practiced without the use of these specific details. In other instances, well-known structures and processes have not been described in detail in order to avoid obscuring the description of the application. Thus, the present application is not intended to be limited by the embodiments shown, but is to be accorded with the widest scope consistent with the principles and features disclosed.

[0030] Please refer to Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a first embodiment of a ranging device provided by the present application, Figure 2 is Figure 1 A corresponding another optical path schematic diagram, the ranging device 100 includes a first telescopic component 10, a second telescopic component 20, a light source component 30, a first ranging component 40 and a second ranging component 50.

[0031] Among them, the first telescopic component 10 forms a first optical path for the human eye to zoom; the second telescopic component 20 forms a second optical path for the human eye to zoom; the light source component 30 is configured to generate double-wavelength combined laser, the double-wavelength combined laser is emitted via the first optical path; the first ranging component 40 is configured to receive the double-wavelength combined laser reflected by the target and the first double-wavelength echo laser via the first optical path, and measure the first distance of the target by phase method; the second ranging component 50 is configured to receive the double-wavelength combined laser reflected by the target and the second double-wavelength echo laser via the second optical path, and measure the second distance of the target by time flight method.

[0032] It can be understood that, since the first optical path and the second optical path are used for the human eye to realize the zooming function through the first telescopic component 10 and the second telescopic component 20, the light source component 30, the first ranging component 40 and the second ranging component 50 are all arranged outside the first optical path and the second optical path, and will not interfere with the line of sight of the human eye, that is, the first optical path and the second optical path are 100% transmittance.

[0033] Optionally, the emission of the double-wavelength combined laser and the reception of the first double-wavelength echo laser and the second double-wavelength echo laser can be realized by setting optical elements on the first optical path and the second optical path to change the optical path.

[0034] Among them, the phase method (Phase) is to measure the distance by using the phase difference of the laser beam, which has the advantages of high precision, long distance measurement, etc. This method is widely used in precision measurement field, such as car body manufacturing, machine tool processing, etc. The principle is to calculate the distance of the measured object by using phase. The disadvantage of phase measurement method is low sensitivity, only in weak light can realize high precision measurement, so in the occasion of high precision measurement, strong light source is needed.

[0035] Specifically, the ranging principle of the phase method is to calculate the distance by measuring the phase difference of the laser emission and reception. The laser radar emits a laser beam with a modulation frequency, and by measuring the phase difference between the reflected laser and the emitted laser, the distance of the laser radar to the target object can be calculated. This method has high precision, but it needs stable laser light source and accurate phase measurement equipment.

[0036] Among them, the time flight method (Time-of-Flight, ToF) is to calculate the distance of the measured object to the laser by using the flight time of the laser pulse. This method is widely used, such as unmanned driving, ship navigation and industrial measurement, etc. The principle is to calculate the distance by using the round trip time of the laser pulse. The advantage of time flight method is high measurement precision and wide measurement range, but the time precision and sampling rate of laser pulse need to be considered to ensure the measurement precision.

[0037] Specifically, the ranging principle of the time-of-flight method is to calculate the distance by measuring the time from the emission of the laser pulse to the return. The laser radar emits a laser pulse, and then detects the time of the laser pulse reflected from the target object. The distance of the laser radar to the target object is calculated by the speed of light and the time. This method has high precision, but it needs high precision timer and certain requirements for the reflection properties of the target.

[0038] Optionally, in an embodiment, the first distance and the second distance are measured by the above two ranging principles respectively, and any one of them can be selected as the final ranging result, or the average value of the first distance and the second distance can be used as the final ranging result.

[0039] In addition, the ranging device 100 of the embodiment of the application can also include an angle sensor, which is used to obtain the angle of the first light path and the second light path of the ranging device 100, for example, it can be a gyroscope, a gravity sensor, a magnetic force sensor, etc.

[0040] The ranging device provided by the embodiment comprises: a first telescopic assembly, which forms a first light path for human eye telescoping; a second telescopic assembly, which forms a second light path for human eye telescoping; a light source assembly, which is configured to generate double-wavelength combined laser, and the double-wavelength combined laser is emitted via the first light path; a first ranging assembly, which is configured to receive first double-wavelength echo laser of the double-wavelength combined laser reflected by a target via the first light path, and measure a first distance of the target by phase method; and a second ranging assembly, which is configured to receive second double-wavelength echo laser of the double-wavelength combined laser reflected by the target via the second light path, and measure a second distance of the target by time flight method. Specifically, two telescopic light paths of a binocular telescope are utilized, the first light path therein is utilized to emit double-wavelength combined laser, and then the first double-wavelength echo laser and the second double-wavelength echo laser after the double-wavelength combined laser is reflected by the target are received by the first light path and the second light path respectively, the first double-wavelength echo laser and the second double-wavelength echo laser are complementary interference, and then the first distance and the second distance are obtained by the first ranging assembly and the second ranging assembly respectively by different ranging principles. In this way, on the one hand, the volume of the ranging device is not additionally increased by utilizing the two telescopic light paths of the binocular telescope, and only the optical elements and the light source assembly, the first ranging assembly and the second ranging assembly need to be reasonably arranged, on the other hand, the first distance and the second distance are obtained by different ranging principles, which can make the ranging result more accurate.

[0041] Referring to Figure 1 and Figure 2 , wherein the red line represents the emission light path of the double-wavelength combined laser, Figure 2 is Figure 1 the incidence light path of the corresponding first double-wavelength echo laser and the second double-wavelength echo laser, the green line represents the incidence light path of the first double-wavelength echo laser, and the blue line represents the incidence light path of the second double-wavelength echo laser.

[0042] Optionally, the ranging device 100 further comprises a first optical assembly 60, which is arranged on the emission light path of the light source assembly 30 and on the incidence light path of the first ranging assembly 40. As shown in Figure 1 , the first optical assembly 60 is configured to change the light path of the double-wavelength combined laser, so that the double-wavelength combined laser is emitted via the first light path. As shown in Figure 2 , the first optical assembly 60 is configured to change the light path of the first double-wavelength echo laser, so that the first ranging assembly 40 receives the first double-wavelength echo laser.

[0043] Optionally, the ranging device 100 further includes a second optical component 70, which is disposed on the incident light path of the second ranging component 50. The second optical component 70 is configured to change the optical path of the second dual-wavelength echo laser so that the second ranging component 50 receives the second dual-wavelength echo laser.

[0044] In one embodiment, the first telescope assembly 10 includes a first eyepiece 11, a first focusing lens 12, and a first collimating lens group 13 arranged sequentially along a first optical axis, and the second telescope assembly 20 includes a second eyepiece 21, a second focusing lens 22, and a second collimating lens group 23 arranged sequentially along a second optical axis. The first focusing lens 12 and the first collimating lens group 13 combine to form a first objective lens, and the second focusing lens 22 and the second collimating lens group 23 combine to form a second objective lens.

[0045] In one embodiment, the light source assembly 30 includes a first laser 31, a second laser 32, a beam combiner 33, and a second lens 34. The laser generated by the first laser 31 and the laser generated by the second laser 32 are combined by the beam combiner 33 to form a dual-wavelength combined laser, which is then emitted through the second lens 34.

[0046] In one embodiment, the light source assembly 30 includes a first laser 31, a second laser 32, a beam combiner 33, and a second lens 34. The laser generated by the first laser 31 and the laser generated by the second laser 32 are combined by the beam combiner 33 to form a dual-wavelength combined laser, which is then emitted through the second lens 34.

[0047] In one embodiment, the first optical component 60 includes a first reflector 61, a second reflector 62, a first lens 63, and a first prism 64. The first reflector 61 is disposed outside the first optical path and includes a through hole; the second reflector 62 is disposed outside the first optical path; the first lens 63 is disposed outside the first optical path; and the first prism 64 is disposed in the first optical path.

[0048] Among them, such as Figure 1 As shown, the dual-wavelength combined laser generated by the light source assembly 30 passes through the through hole of the first reflector 61, is reflected by the second reflector 62, passes through the first lens 63, and is redirected to the first optical path by the first prism 64.

[0049] The light source component 30 and the first optical component 60 constitute a laser emission system.

[0050] Optionally, the first laser 31 and the second laser 32 are near-infrared light sources, and their wavelengths are within the operating range of the same type of detector. For example, 905nm and 940nm near-infrared light can be detected by the same type of silicon-based detector. The laser emitted by the first laser 31 undergoes total internal reflection in the middle of the beam combiner 33 and passes perpendicularly through the beam combiner 33. The laser emitted by the second laser 32 passes perpendicularly through the beam combiner 33, and the two laser beams are combined.

[0051] Optionally, the second mirror 62 is used to fold the optical path. The dual-wavelength laser passing through the first mirror 61 is reflected on the second mirror 62 and is incident on the U region of the first lens 63. As shown in Figure 3 , Figure 3 is a schematic diagram of the regions of the first lens 63 in an embodiment. The first lens 63 is composed of two parts, an E region and a U region. The E region is an annular region, and the U region is in the center of the annular E region. The focal point of the E region is in the center of the photosensitive surface of the first detector 44 of the first ranging assembly 40, and the focal point of the U region is in the center of the pinhole of the first mirror 61. The U region is used for the emission system, and the E region is used for the phase method ranging receiving system. The dual-wavelength laser incident on the U region of the first lens 63 is collimated and exits.

[0052] Optionally, the dual-wavelength collimated laser is turned by the first prism 64, is incident on the first collimating lens group 13, is collimated again, and highly parallel light exits. The first collimating lens group 13 and the first focusing lens 12 are collectively referred to as the first objective lens. The laser exit and the objective lens focusing are not interfered with each other, and the multiplex objective lens element can achieve highly collimated exit of the dual-wavelength laser.

[0053] The first laser 31, the second laser 32, the beam combiner 33, the second lens 34, the first mirror 61, the second mirror 62, the first lens 63, the first prism 64, and the first collimating lens group 13 form the laser emission system in turn, as shown in Figure 1 The entire emission process includes: the first laser 31 and the second laser 32 emit near-infrared light, the two lasers are combined into one beam in the beam combiner 33, the combined laser is focused on the pinhole of the first mirror 61 by the second lens 34, passes through the pinhole without obstruction, the laser passing through the pinhole is reflected at the second mirror 62, the reflected laser is collimated and exits to the first prism 64 through the U region of the first lens 63, is turned by the first prism 64, is incident on the first collimating lens group 13, is collimated again, and highly collimated laser exits.

[0054] The first optical assembly 60 and the first ranging assembly 40 constitute the laser receiving system for phase method measurement.

[0055] In an embodiment, the first optical assembly 60 includes the first mirror 61, the second mirror 62, the first lens 63, and the first prism 64.

[0056] Optionally, the first collimating lens group 13 is used to receive the first dual-wavelength return light beam and has the effect of reducing the beam diameter.

[0057] Optionally, the first prism 64 is used for beam turning, so that the first dual-wavelength return light beam is incident on the first lens 63.

[0058] Optionally, the E region of the first lens 63 is used for full field-of-view reception, and the U region is used for partial off-axis field-of-view reception.

[0059] Optionally, the second reflector 62 is used to fold the optical path, and the first dual-wavelength echo beam is redirected to be incident on the first reflector 61.

[0060] Optionally, the side of the first reflecting mirror 61 facing the second reflecting mirror 62 is the reflecting surface. The received light corresponding to region E of the first lens 63 is a ring-shaped spot centered on a small aperture on the reflecting surface of the first reflecting mirror 61. The inner diameter of the ring-shaped spot is larger than the small aperture of the first reflecting mirror 61, so there is no light leakage. The received light corresponding to region U of the first lens 63 is a circular spot centered on a small aperture on the reflecting surface. The maximum radius of the circular spot is larger than the small aperture of the first lens 63. The paraxial field of view passes directly through the small aperture, resulting in light leakage loss, while the off-axis field of view is reflected by the reflecting surface.

[0061] In one embodiment, the first ranging component 40 includes a first detector 44, a filter 41, a conical tube 42, and an aperture 43. The first dual-wavelength echo laser is received by the first detector 44 after passing through the filter 41, the conical tube 42, and the aperture 43 in sequence.

[0062] Optionally, the phase ranging method uses a single wavelength of laser light for calculation, and filter 41 is used to filter out one wavelength of laser light. Here, the laser light corresponding to the second laser 32 is used as an example. That is, the first detector 44 only receives the laser light of the wavelength corresponding to the first laser 31.

[0063] Optionally, such as Figure 4 As shown, Figure 4 This is a schematic diagram of some components of a phase-based laser receiving system. The conical cylinder 42 has an outer light-absorbing coating and an inner conical reflective surface, mainly used to collect the laser light received in the U region of the first lens 63. Combined with... Figure 3 The focal point of region U is at the small hole of the first reflector 61, so the light beam cannot be directly focused on the photosensitive surface of the first detector 44. The inner reflective surface of the conical tube 42 is needed to reflect the laser beam multiple times toward the photosensitive surface of the first detector 44 for collection.

[0064] Optionally, the aperture 43 is used to intercept stray light outside the cone 42 when the first detector 44 is not sealed to the cone 42.

[0065] Optionally, the first detector 44 can be a silicon-based detector, same as the second detector. The silicon-based detector is a photodiode made of semiconductor material, and the core part is a P-N junction. The hole concentration in the P-type semiconductor is higher than the electron concentration, and the electron concentration in the N-type semiconductor is higher than the hole concentration. When the two are combined, the holes in the P region diffuse to the N region and leave the ionized acceptor to make the P region negatively charged, and the electrons in the N region diffuse to the P region and leave the ionized donor to make the N region positively charged. The charge accumulates on both sides of the P-N junction to form a self-built electric field EP. The electrons and holes in the P and N regions drift to the N and P regions under the action of the self-built electric field, and the self-built electric field of the P-N junction prevents the electrons and holes from further diffusing to each other to reach equilibrium. A depletion layer is formed in the P-N junction region. The drift of the minority carriers cannot form sufficient current, but when an external light field is present, a large number of electron-hole pairs are generated, and then under the action of the built-in electric field, the electron-hole pairs separate and drift, forming a strong photocurrent. According to the structure, the silicon-based photodetector is divided into: ① P-I-N photodetector, a layer of intrinsic layer is added to the P region and N region of the photodetector. Due to the addition of the intrinsic layer, the width of the depletion region is greatly improved, thereby improving the performance of the P-I-N photodetector. ② Avalanche photodetector, which uses strong electric field to produce carrier multiplication effect (avalanche multiplication effect) to achieve higher responsivity and can detect smaller power optical signals. ③ Metal-semiconductor-metal photodetector, which is essentially a back-to-back series of two metal-semiconductor contact diodes. The silicon-based photodetector has the advantages of small size, firmness, reliability, low power consumption, etc. The response wavelength is 0.35-1.1 microns, which is the most commonly used photodetector from visible light to near-infrared spectrum, and is the main detection element in many applications such as laser measurement and optical fiber communication.

[0066] Wherein, the first collimating mirror group 13, the first prism 64, the first lens 63, the second reflecting mirror 62, the first reflecting mirror 61, the filter 41, the conical barrel 42 and the first detector 44 form a phase method laser receiving system in sequence, as shown in Figure 2 The whole receiving process includes: the second dual-wavelength echo laser reflected and scattered by the target is received by the first collimating mirror group 13, the laser beam width through the first collimating mirror group 13 is reduced to a certain extent, then is incident to the first prism 64, is turned by the first prism 64, and is incident to the first lens 63; the E region laser through the first lens 63 will be reflected by the second reflecting mirror 62, the first reflecting mirror 61, the filter 41 filters out the laser of the corresponding wavelength of the second laser 32, and is focused on the photosensitive surface of the first detector 44. The U region laser through the first lens 63 will be reflected by the second reflecting mirror 62, the first reflecting mirror 61 (part of the remaining small hole light leakage), the filter 41 filters out the laser of the corresponding wavelength of the second laser 32, and is reflected by the conical barrel 42, and is collected on the photosensitive surface of the first detector 44.

[0067] The second optical assembly 70 and the second ranging assembly 50 constitute a laser receiving system for time-of-flight measurement.

[0068] In an embodiment, the second optical assembly 70 comprises a second prism 71 and a third lens 72. The second dual-wavelength echo laser is turned by the second prism 71 and is received by the second ranging assembly 50 via the third lens 72. The second ranging assembly 50 comprises a second detector.

[0069] Optionally, the second collimating mirror group 23 is used to receive the second dual-wavelength echo laser beam and has the effect of reducing the beam diameter.

[0070] Optionally, the second prism 71 is used for beam turning so that the second dual-wavelength echo laser beam is incident to the third lens 72.

[0071] Optionally, the third lens 72 is used to focus the laser on the photosensitive surface of the second detector. The second detector can be a silicon-based detector, which is the same as the first detector 44 described above, and will not be described here.

[0072] The second collimating mirror group 23, the second prism 71, the third lens 72, and the second detector form a laser receiving system for time-of-flight measurement in sequence, as shown in Figure 2 The entire receiving process includes: the second dual-wavelength echo laser beam reflected and scattered by the target is received by the second collimating mirror group 23, the laser beam width is reduced to a certain extent by the second collimating mirror group 23, then is incident to the second prism 71, is turned by the second prism 71, is incident to the third lens 72, and the third lens 72 focuses the laser on the photosensitive surface of the second detector.

[0073] It can be understood that the ranging device 100 described above can realize ranging based on both phase method and time-of-flight method, and can realize ranging in two modes by adjusting the optical filter 41 (adding or removing the optical filter 41). As shown in Figure 5 Figure 5 is a schematic diagram of a dual-mode ranging process in an embodiment.

[0074] The dual-mode ranging working process is as follows:

[0075] I. Dual-mode with the same frequency (clock) of dual-wavelength laser: The optical wave modulator only modulates the laser used in the phase ranging algorithm, and the other wavelength of laser is filtered out by the optical filter; the time-of-flight ranging receives dual-wavelength laser, because the two signals are clock-synchronized, the two signals are coincident, and have the effect of enhancing the signal.

[0076] ​II. Dual-mode of dual-wavelength laser with same frequency (clock with different frequency) setting: the light wave modulator modulates two kinds of wavelength laser, one as the reference wave for signal processing, and the signal wave for ranging is combined to form a special signal distribution, which improves the noise immunity and positioning accuracy, thereby increasing the ranging range and improving the ranging accuracy; the time-of-flight method receives dual-wavelength laser, and the two kinds of wavelength laser are mutual reference waves in the signal processing system of the receiving system, which improves the noise immunity and positioning accuracy, thereby increasing the ranging range and improving the ranging accuracy.

[0077] Please refer to Figure 6 and Figure 7 , Figure 6 is a structural schematic diagram of a second embodiment of the ranging device provided by the present application, Figure 7 is Figure 6 a corresponding another optical path schematic diagram. The ranging device 100 comprises a first telescopic assembly 10, a second telescopic assembly 20, a light source assembly 30, a first ranging assembly 40, a second ranging assembly 50, a first optical assembly 60 and a second optical assembly 70.

[0078] The first telescopic assembly 10 comprises a first ocular lens 11, a first focusing mirror 12 and a first collimating mirror group 13 arranged in sequence along a first optical axis, and the second telescopic assembly 20 comprises a second ocular lens 21, a second focusing mirror 22 and a second collimating mirror group 23 arranged in sequence along a second optical axis. The first focusing mirror 12 and the first collimating mirror group 13 are combined to form a first objective lens, and the second focusing mirror 22 and the second collimating mirror group 23 are combined to form a second objective lens.

[0079] The light source assembly 30 comprises a first laser 31, a second laser 32, a beam combiner 33 and a second lens 34. The laser generated by the first laser 31 and the laser generated by the second laser 32 are combined by the beam combiner 33 to form dual-wavelength combined laser, and then exit through the second lens 34.

[0080] The first optical assembly 60 comprises a first reflecting mirror 61, a first lens 63 and a first prism 64.

[0081] The second optical assembly 70 comprises a second prism 71 and a third lens 72.

[0082] The first ranging assembly 40 comprises a first detector 44, a filter 41, a conical barrel 42 and an aperture 43.

[0083] The second ranging assembly 50 comprises a second detector.

[0084] It can be understood that the difference between the present embodiment and the above-mentioned first embodiment is that the second reflecting mirror is not provided by changing the optical path.

[0085] Wherein, the first laser 31, the second laser 32, the beam combiner 33, the second lens 34, the first mirror 61, the first lens 63, the first prism 64 and the first collimator group 13 form a laser emitting system in sequence, as shown in the figure. Figure 6 As shown, the whole emitting process includes: the first laser 31 and the second laser 32 emit near-infrared light, the two beams of light are combined into one beam in the beam combiner 33, the combined laser is focused on the pinhole of the first mirror 61 by the second lens 34, and passes through without obstruction, the laser passing through the pinhole is collimated by the U area of the first lens 63 and emitted to the first prism 64, which is turned to the first collimator group 13, which is collimated again, and the highly collimated laser is emitted.

[0086] Wherein, the first collimator group 13, the first prism 64, the first lens 63, the first mirror 61, the filter 41, the conical barrel 42, the diaphragm 43 and the first detector 44 form a laser receiving system in sequence, as shown in the figure. Figure 7 As shown, the whole receiving process includes: the second dual-wavelength echo laser reflected and scattered by the target is received by the first collimator group 13, the beam width of the laser passing through the first collimator group 13 is reduced to a certain extent, and then is incident to the first prism 64, which is turned to the first lens 63; the laser passing through the E area of the first lens 63 is reflected by the first mirror 61 in sequence, the laser of the second laser 32 corresponding wavelength is filtered out by the filter 41, and is focused on the photosensitive surface of the first detector 44. The laser passing through the U area of the first lens 63 is reflected by the second mirror 62 in sequence, a part of which is reflected by the first mirror 61 (the rest is pinhole light leakage), the laser of the second laser 32 corresponding wavelength is filtered out by the filter 41, and is reflected by the conical barrel 42 and collected on the photosensitive surface of the first detector 44.

[0087] Please refer to Figure 8 , Figure 8 is the structural schematic diagram of the third embodiment of the distance measuring device provided by the application. The distance measuring device 100 comprises a first telescopic assembly 10, a second telescopic assembly 20, a light source assembly 30, a first distance measuring assembly 40, a second distance measuring assembly 50, a first optical assembly 60 and a second optical assembly 70.

[0088] Wherein, the first telescopic assembly 10 comprises a first ocular lens 11, a first focusing mirror 12 and a first collimator group 13 arranged in sequence along a first optical axis, and the second telescopic assembly 20 comprises a second ocular lens 21, a second focusing mirror 22 and a second collimator group 23 arranged in sequence along a second optical axis. Wherein, the first focusing mirror 12 and the first collimator group 13 combine to form a first objective lens, and the second focusing mirror 22 and the second collimator group 23 combine to form a second objective lens.

[0089] The light source assembly 30 includes a first laser 31, a second laser 32, a beam combiner 33, and a second lens 34. The laser generated by the first laser 31 and the laser generated by the second laser 32 are combined by the beam combiner 33 to form dual-wavelength combined laser, and then exit through the second lens 34.

[0090] The first optical assembly 60 includes a first mirror 61, a first lens 63, and a first prism 64.

[0091] The second optical assembly 70 includes a second prism 71 and a third lens 72.

[0092] The first ranging assembly 40 includes a first detector 44 and a filter 41.

[0093] The second ranging assembly 50 includes a second detector.

[0094] It can be understood that the difference between the embodiment and the first embodiment described above is that the tapered cylinder and the diaphragm are not provided.

[0095] The first collimating mirror group 13, the first prism 64, the first lens 63, the first mirror 61, the filter 41, and the first detector 44 form a phase method laser receiving system in sequence, as shown in Figure 7 The second dual-wavelength echo laser reflected and scattered by the target is received by the first collimating mirror group 13, the width of the laser beam passing through the first collimating mirror group 13 is reduced to a certain extent, and then the laser beam is incident on the first prism 64. The laser beam is turned by the first prism 64 and then incident on the first lens 63. The E area laser passing through the first lens 63 is reflected by the first mirror 61, the laser of the wavelength corresponding to the second laser 32 is filtered out by the filter 41, and then focused on the photosensitive surface of the first detector 44. The U area laser passing through the first lens 63 is reflected by the second mirror 62, reflected by the first mirror 61 (the rest is small hole light leakage), the laser of the wavelength corresponding to the second laser 32 is filtered out by the filter 41, and then collected on the photosensitive surface of the first detector 44.

[0096] It can be understood that the ranging device 100 provided by the embodiment of the application can be applied to binocular telescopes. In addition to binocular telescopes, the ranging device 100 can also be applied to a camera and laser radar fusion sensing system in a new energy vehicle, a settlement and deformation health monitoring system for bridges, tunnels, railways, and buildings, etc.

[0097] The power supply control device, the power supply control method and the power supply system provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed, and the above description should not be understood as a limitation on the present application.

Claims

1. A ranging device, characterized by, The ranging device comprises: a first telescopic assembly forming a first light path for human eye telescoping; a second telescopic assembly forming a second light path for human eye telescoping; a light source assembly configured to generate dual-wavelength combined laser light which exits via the first light path; a first ranging assembly configured to receive first dual-wavelength echo laser light of the dual-wavelength combined laser light reflected by a target via the first light path and measure a first distance of the target by phase method; a second ranging assembly configured to receive second dual-wavelength echo laser light of the dual-wavelength combined laser light reflected by a target via the second light path and measure a second distance of the target by time flight method.

2. The ranging device of claim 1, wherein, The ranging device further comprises a first optical assembly disposed on an exit light path of the light source assembly and on an entrance light path of the first ranging assembly; the first optical assembly is configured to change the light path of the dual-wavelength combined laser light so that the dual-wavelength combined laser light exits via the first light path; and the first optical assembly is configured to change the light path of the first dual-wavelength echo laser light so that the first ranging assembly receives the first dual-wavelength echo laser light.

3. The ranging device of claim 2, wherein, The first optical assembly comprises: a first mirror disposed outside the first light path, the first mirror comprising a through hole; a first lens disposed outside the first light path; a first prism disposed on the first light path; wherein the dual-wavelength combined laser light generated by the light source assembly is turned to the first light path via the through hole of the first mirror, the first lens, and through the first prism; wherein the first dual-wavelength echo laser light is turned through the first prism, exits via the first lens, and is reflected by the first mirror to be received by the first ranging assembly.

4. The ranging device of claim 3, wherein, The first optical assembly further comprises a second mirror disposed outside the first light path; wherein the dual-wavelength combined laser light generated by the light source assembly is turned to the first light path via the through hole of the first mirror, reflected by the second mirror, exits via the first lens, and through the first prism; wherein the first dual-wavelength echo laser light is turned through the first prism, exits via the first lens, reflected by the second mirror, and reflected by the first mirror to be received by the first ranging assembly.

5. The ranging device of claim 3, wherein, The first telescopic assembly comprises a first ocular lens, a first focusing mirror, and a first collimating mirror group disposed in sequence along a first optical axis, and the first prism is disposed between the first focusing mirror and the first collimating mirror group.

6. The ranging device of any one of claims 1-5, wherein, The light source assembly comprises a first laser, a second laser, a combining mirror, and a second lens, and the laser generated by the first laser and the laser generated by the second laser are combined via the combining mirror to form the dual-wavelength combined laser light which exits via the second lens.

7. The ranging device of any one of claims 1-5, wherein, The first ranging assembly comprises a first detector, a filter, a conical barrel and a diaphragm, and the first dual-wavelength return laser is received by the first detector in sequence via the filter, the conical barrel and the diaphragm.

8. The ranging device of claim 1, wherein, The ranging device further comprises a second optical assembly arranged on an incident light path of the second ranging assembly, and the second optical assembly is configured to change a light path of the second dual-wavelength return laser so that the second ranging assembly receives the second dual-wavelength return laser.

9. The ranging device of claim 8, wherein, The second optical assembly comprises: a second prism arranged on the second light path; a third lens arranged outside the second light path; wherein the second dual-wavelength return laser is turned by the second prism and received by the second ranging assembly via the third lens.

10. The ranging device of claim 9, wherein, The second telescopic assembly comprises a second ocular lens, a second focusing mirror and a second collimating mirror group arranged in sequence along a second optical axis, and the second prism is arranged between the second focusing mirror and the second collimating mirror group.

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