Distance measuring device

Abstract

The invention 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 technical field of telescopic distance measurement, and in particular to a distance measurement device. Background Art

[0002] Binoculars, also known as binoculars, are telescopes consisting of two monoculars placed side by side. The distance between the two eyepieces can be adjusted so that both eyes can observe at the same time, thus obtaining a three-dimensional effect.

[0003] Current binoculars are generally equipped with a ranging system, but there are many ranging methods. Due to their small size and compact structure, binoculars can only choose one ranging method, resulting in low ranging accuracy. Summary of the invention

[0004] The present application provides a distance measurement device, which can improve the distance measurement accuracy.

[0005] On the one hand, the present application provides a ranging device, which includes: a first telescopic component, the first telescopic component forms a first optical path for human eye telescope; a second telescopic component, the second telescopic component forms a second optical path for human eye telescope; a light source component, the light source component is configured to generate a dual-wavelength combined laser, and the dual-wavelength combined laser is emitted via the first optical path; a first ranging component, the first ranging component is configured to receive the first dual-wavelength echo laser that is reflected by the dual-wavelength combined laser through a target and passes through the first optical path, and measures a first distance to the target through a phase method; a second ranging component, the second ranging component is configured to receive the second dual-wavelength echo laser that is reflected by the dual-wavelength combined laser through a target and passes through the second optical path, and measures a second distance to the target through a time-of-flight method.

[0006] In one embodiment, the ranging device also includes a first optical component, which is arranged on the outgoing light path of the light source component and on the incident light path of the first ranging component; the first optical component is configured to change the optical path of the dual-wavelength combined laser so that the dual-wavelength combined laser is emitted through the first optical path; and the first optical component is configured to change the optical path of the first dual-wavelength echo laser so that the first ranging component receives the first dual-wavelength echo laser.

[0007] In one embodiment, the first optical component includes: a first reflector, arranged outside the first optical path, the first reflector including a through hole; a first lens, arranged outside the first optical path; a first prism, arranged on the first optical path; wherein the dual-wavelength combined laser generated by the light source component is redirected to the first optical path via the through hole of the first reflector, the first lens, and the first prism; wherein the first dual-wavelength echo laser is redirected via the first prism, passes through the first lens, and is reflected by the first reflector to be received by the first ranging component.

[0008] In one embodiment, the first optical component also includes a second reflector, which is arranged outside the first optical path; wherein the dual-wavelength combined beam laser generated by the light source component is passed through the through hole of the first reflector, reflected by the second reflector, passed through the first lens, and turned to the first optical path through the first prism; wherein the first dual-wavelength echo laser is turned through the first prism, passed through the first lens, reflected by the second reflector, and reflected by the first reflector, so as to be received by the first ranging component.

[0009] In one embodiment, the first telescopic assembly includes a first eyepiece, a first focusing lens, and a first collimating lens group which are sequentially arranged along the first optical axis, and the first prism is arranged between the first focusing lens and the first collimating lens group.

[0010] In one embodiment, the light source assembly includes a first laser, a second laser, a beam combiner and a second lens. The laser generated by the first laser and the laser generated by the second laser are combined by the beam combiner to form a dual-wavelength combined laser, which is then emitted through the second lens.

[0011] In one embodiment, the first distance measuring component includes a first detector, a filter, a conical tube and an aperture, and the first dual-wavelength echo laser is received by the first detector after passing through the filter, the conical tube and the aperture in sequence.

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

[0013] In one embodiment, the second optical component includes: a second prism, arranged on the second optical path; and a third lens, arranged outside the second optical path; wherein the second dual-wavelength echo laser is deflected by the second prism and passed through the third lens to be received by the second ranging component.

[0014] In one embodiment, the second telescopic assembly includes a second eyepiece, a second focusing lens, and a second collimating lens group which are sequentially arranged along the second optical axis, and the second prism is arranged between the second focusing lens and the second collimating lens group.

[0015] The ranging device provided by the present application includes: a first telescope component, the first telescope component forms a first optical path for human eye telescope; a second telescope component, the second telescope component forms a second optical path for human eye telescope; a light source component, the light source component is configured to generate a dual-wavelength combined laser, and the dual-wavelength combined laser is emitted through the first optical path; a first ranging component, the first ranging component is configured to receive the first dual-wavelength echo laser that is reflected by the dual-wavelength combined laser through the target and passes through the first optical path, and measures the first distance of the target through the phase method; a second ranging component, the second ranging component is configured to receive the second dual-wavelength echo laser that is reflected by the dual-wavelength combined laser through the target and passes through the second optical path, and measures the second distance of the target through the time of flight method. Specifically, two telescopic optical paths of the binocular telescope are used, and the first optical path is used to emit a dual-wavelength combined laser beam, and then the first optical path and the second optical path are used to receive the first dual-wavelength echo laser and the second dual-wavelength echo laser after the dual-wavelength combined laser beam is reflected by the target, respectively. The first dual-wavelength echo laser and the second dual-wavelength echo laser complement each other, and then the first distance and the second distance are obtained by using different distance measurement principles after being received by the first distance measurement component and the second distance measurement component respectively. In the above manner, on the one hand, the volume of the distance measurement device will not be increased by using the two telescopic optical paths of the binocular telescope, and only the optical elements and the light source component, the first distance measurement component and the second distance measurement component need to be reasonably arranged. On the other hand, the first distance and the second distance are obtained by using different distance measurement principles respectively, which can make the distance measurement result more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is a structural schematic diagram of a first embodiment of a distance measuring device provided by the present application;

[0018] Figure 2 yes Figure 1 Another corresponding optical path schematic diagram;

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

[0020] Figure 4 It is a schematic diagram of some components of the laser receiving system of the phase method;

[0021] Figure 5 This is a schematic diagram of a dual-mode ranging process in one embodiment;

[0022] Figure 6 is a structural schematic diagram of a second embodiment of a distance measuring device provided by the present application;

[0023] Figure 7 yes Figure 6 Another corresponding optical path schematic diagram;

[0024] Figure 8 It is a structural schematic diagram of the third embodiment of the distance measuring device provided by the present application. DETAILED DESCRIPTION

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

[0026] In the description of the present application, 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which 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 specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

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

[0028] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be 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 the stated values ​​in practice.

[0029] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0030] See also Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of the first embodiment of the distance measuring device provided by the present application, Figure 2 yes Figure 1 Corresponding to another optical path schematic diagram, the distance measuring device 100 includes a first telescopic component 10, a second telescopic component 20, a light source component 30, a first distance measuring component 40 and a second distance measuring component 50.

[0031] Among them, the first telescope component 10 forms a first optical path for human eye telescope; the second telescope component 20 forms a second optical path for human eye telescope; the light source component 30 is configured to generate a dual-wavelength combined laser, and the dual-wavelength combined laser is emitted through the first optical path; the first ranging component 40 is configured to receive the first dual-wavelength echo laser that is reflected by the dual-wavelength combined laser through the target and passes through the first optical path, and measures the first distance of the target by the phase method; the second ranging component 50 is configured to receive the second dual-wavelength echo laser that is reflected by the dual-wavelength combined laser through the target and passes through the second optical path, and measures the second distance of the target by the time of 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 achieve the telescopic function through the first telescope assembly 10 and the second telescope assembly 20, the light source assembly 30, the first ranging assembly 40 and the second ranging assembly 50 are all arranged outside the first optical path and the second optical path, and will not interfere with the vision of the human eye, that is, the first optical path and the second optical path have a 100% light transmittance.

[0033] Optionally, the optical paths may be changed by arranging optical elements on the first optical path and the second optical path, thereby achieving emission of dual-wavelength combined laser light and reception of the first dual-wavelength echo laser light and the second dual-wavelength echo laser light.

[0034] Among them, the phase method uses the phase difference of the laser beam to measure the distance, which has the advantages of high precision and long distance measurement. This method is widely used in the field of precision measurement, such as car body manufacturing, machine tool processing, etc. Its principle is to use the phase to calculate the distance of the object being measured. The disadvantage of the phase measurement method is that it has low sensitivity and can only achieve high-precision measurement in weak light. Therefore, a stronger light source is required in situations where high-precision measurement is required.

[0035] Specifically, the phase method is to calculate the distance by measuring the phase difference between laser emission and reception. The laser radar emits a beam of modulated laser light, and by measuring the phase difference between the reflected laser and the emitted laser, the distance from the laser radar to the target object can be calculated. This method has high accuracy, but requires a stable laser light source and precise phase measurement equipment.

[0036] Among them, the time-of-flight method (ToF) uses the flight time of the laser pulse to calculate the distance from the object to the laser. This method is widely used, such as unmanned driving, ship navigation, and industrial measurement. Its principle is to use the round-trip time of the laser pulse to calculate the distance. The advantages of the time-of-flight method are high measurement accuracy and wide measurement range, but the time accuracy and sampling rate of the laser pulse need to be taken into account to ensure the measurement accuracy.

[0037] Specifically, the distance measurement principle of the time-of-flight method is to calculate the distance by measuring the time from the emission to the return of the laser pulse. The laser radar emits a laser pulse, and then detects the time when the laser pulse is reflected from the target object, and calculates the distance from the laser radar to the target object by the speed of light and time. This method has high accuracy, but requires a high-precision timer and has certain requirements on the reflective properties of the target.

[0038] Optionally, in an embodiment, the first distance and the second distance are measured respectively by the above two distance measurement principles, and either one of them can be selected as the final distance measurement result, or the first distance and the second distance can be averaged as the final distance measurement result.

[0039] In addition, the distance measuring device 100 of the embodiment of the present application may further include an angle sensor, which is used to obtain the angle of the first light path and the second light path of the distance measuring device 100. For example, the angle sensor may be a gyroscope, a gravity sensor, a magnetic sensor, etc.

[0040] The ranging device provided in this embodiment includes: a first telescopic component, the first telescopic component forms a first optical path for human eye telescope; a second telescopic component, the second telescopic component forms a second optical path for human eye telescope; a light source component, the light source component is configured to generate a dual-wavelength combined laser, and the dual-wavelength combined laser is emitted through the first optical path; a first ranging component, the first ranging component is configured to receive the first dual-wavelength echo laser that is reflected by the dual-wavelength combined laser through the target and passes through the first optical path, and measures the first distance of the target through the phase method; a second ranging component, the second ranging component is configured to receive the second dual-wavelength echo laser that is reflected by the dual-wavelength combined laser through the target and passes through the second optical path, and measures the second distance of the target through the time of flight method. Specifically, two telescopic optical paths of the binocular telescope are used, and the first optical path is used to emit a dual-wavelength combined laser beam, and then the first optical path and the second optical path are used to receive the first dual-wavelength echo laser and the second dual-wavelength echo laser after the dual-wavelength combined laser beam is reflected by the target, respectively. The first dual-wavelength echo laser and the second dual-wavelength echo laser complement each other, and then the first distance and the second distance are obtained by using different distance measurement principles after being received by the first distance measurement component and the second distance measurement component respectively. In the above manner, on the one hand, the volume of the distance measurement device will not be increased by using the two telescopic optical paths of the binocular telescope, and only the optical elements and the light source component, the first distance measurement component and the second distance measurement component need to be reasonably arranged. On the other hand, the first distance and the second distance are obtained by using different distance measurement principles respectively, which can make the distance measurement result more accurate.

[0041] See also Figure 1 and Figure 2 , where the red line represents the emission path of the dual-wavelength combined laser. Figure 2 for Figure 1 Corresponding incident light paths of the first dual-wavelength echo laser and the second dual-wavelength echo laser, the green line represents the incident light path of the first dual-wavelength echo laser, and the blue line represents the incident light path of the second dual-wavelength echo laser.

[0042] Optionally, the distance measuring device 100 further includes a first optical component 60, which is disposed on the outgoing light path of the light source component 30 and on the incident light path of the first distance measuring component 40. Figure 1 As shown, the first optical component 60 is configured to change the optical path of the dual-wavelength combined laser beam so that the dual-wavelength combined laser beam is emitted through the first optical path. Figure 2 As shown, the first optical component 60 is configured to change the optical path of the first dual-wavelength echo laser so that the first distance measuring component 40 receives the first dual-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, and is configured to change the light 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 telescopic assembly 10 includes a first eyepiece 11, a first focusing lens 12, and a first collimating lens group 13, which are sequentially arranged along the first optical axis, and the second telescopic assembly 20 includes a second eyepiece 21, a second focusing lens 22, and a second collimating lens group 23, which are sequentially arranged along the second optical axis. The first focusing lens 12 and the first collimating lens group 13 are combined to form a first objective lens, and the second focusing lens 22 and the second collimating lens group 23 are combined 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 arranged outside the first optical path, and the first reflector 61 includes a through hole; the second reflector 62 is arranged outside the first optical path; the first lens 63 is arranged outside the first optical path; and the first prism 64 is arranged in the first optical path.

[0048] Among them, Figure 1 As shown, the dual-wavelength combined laser beam 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 assembly 30 and the first optical assembly 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 working range of the same detector, such as 905nm and 940nm near-infrared light can be detected by the same silicon-based detector. The laser emitted by the first laser 31 passes vertically through the beam combiner 33 after total reflection in the middle of the beam combiner 33, and the laser emitted by the second laser 32 passes vertically through the beam combiner 33, and the two laser beams are combined.

[0051] Optionally, the second reflector 62 is used to fold the optical path. The dual-wavelength laser passing through the first reflector 61 is reflected on the second reflector 62 and incident on the U region of the first lens 63. Figure 3 As shown, Figure 3 : This is a schematic diagram of the region of the first lens 63 in an embodiment. The first lens 63 consists of two parts, the E region and the U region. The E region is an annular region, the U region is at the center of the annular region of the E region, the focus of the E region is at the center of the photosensitive surface of the first detector 44 of the first distance measuring component 40, and the focus of the U region is at the center of the small hole of the first reflector 61. The U region is used for the transmitting system, and the E region is used for the phase method distance measuring receiving system. The dual-wavelength laser incident on the U region of the first lens 63 is collimated and emitted.

[0052] Optionally, the dual-wavelength collimated laser is deflected by the first prism 64, incident on the first collimating lens group 13, and collimated again, and highly parallelized light is emitted. The first collimating lens group 13 and the first focusing lens 12 are collectively referred to as the first objective lens. The laser emission and the objective lens focusing do not interfere with each other, and the objective lens elements are multiplexed to achieve highly collimated emission of dual-wavelength laser.

[0053] The first laser 31, the second laser 32, the beam combiner 33, the second lens 34, the first reflector 61, the second reflector 62, the first lens 63, the first prism 64 and the first collimator lens group 13 sequentially form a laser emission system. Figure 1 As shown, the entire emission process includes: the first laser 31 and the second laser 32 emit near-infrared light, the two laser beams are combined into one light beam in the beam combiner 33, the combined laser is focused by the second lens 34 at the small hole of the first reflector 61, and passes through unobstructed, the laser passing through the small hole is reflected at the second reflector 62, the reflected laser is collimated through the U area of ​​the first lens 63 and emitted to the first prism 64, is turned through the first prism 64, and is incident on the first collimating lens group 13, and is collimated again to emit highly collimated laser.

[0054] The first optical component 60 and the first distance measuring component 40 constitute a laser receiving system for phase method measurement.

[0055] 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 .

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

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

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

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

[0060] Optionally, the side of the first reflector 61 facing the second reflector 62 is a reflective surface, and the received light corresponding to the E region of the first lens 63 is an annular light spot centered on the pinhole on the reflective surface of the first reflector 61, and the inner diameter of the annular light spot is larger than the pinhole of the first reflector 61, and there is no light leakage. The received light corresponding to the U region of the first lens 63 is a circular light spot centered on the pinhole on the reflective surface, and the maximum radius of the circular light spot is larger than the pinhole of the first lens 63. The paraxial field of view directly passes through the pinhole, and light leakage is lost, and the off-axis field of view is reflected on the reflective surface.

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

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

[0063] Alternatively, if Figure 4 As shown, Figure 4 It is a schematic diagram of some components of the laser receiving system of the phase method. The outer surface of the conical tube 42 is a light-absorbing coating, and the inner surface is a conical reflecting surface, which is mainly used to collect the received laser in the U area of ​​the first lens 63. Figure 3 The focus of the U area is at the small hole of the first reflector 61, so the light beam cannot be directly converged on the photosensitive surface of the first detector 44. It is necessary to use the internal reflection surface of the conical tube 42 to reflect the laser toward the photosensitive surface of the first detector 44 multiple times for collection.

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

[0065] Optionally, the first detector 44 can be a silicon-based detector, which is the same as the second detector. The silicon-based detector is a photodiode made of semiconductor material, and its core part is a PN junction. The hole concentration in a P-type semiconductor is higher than the electron concentration, and the electron concentration in an 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 ionized acceptors to make the P region negatively charged. The electrons in the N region diffuse to the P region and leave ionized donors to make the N region positively charged. The charges accumulate on both sides of the PN junction to form a self-built electric field from N to P. The electrons in the EP region and the holes in the N region drift to the N region and the P region respectively under the action of the self-built electric field. At the same time, the self-built electric field of the PN junction prevents the electrons and holes from further diffusing to each other and reaching equilibrium, so a depletion layer is formed in the PN junction region. It is difficult for minority carrier drift to form sufficient current, but a large number of electron and hole pairs will be generated when there is an external light field. Then, under the action of the built-in electric field, the electron-hole pairs separate and drift, which can form a strong photocurrent. According to different structures, silicon-based photodetectors are divided into: ① P-IN photodetector, an 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 increased, thereby improving the performance of the PIN photodetector. ② Avalanche photodetector, with the help of strong electric field to produce carrier multiplication effect (avalanche multiplication effect), to achieve higher responsiveness, can detect smaller power light signals. ③ Metal-semiconductor-metal photodetector, essentially a back-to-back series connection of two metal semiconductor contact diodes. Silicon-based photodetectors have the advantages of small size, ruggedness, reliability, and low power consumption. The response wavelength is 0.35 to 1.1 microns. It is the most commonly used photodetector from visible light to near-infrared spectral region. It is the main detection element in many applications such as laser measurement and optical fiber communication.

[0066] The first collimator lens group 13, the first prism 64, the first lens 63, the second reflector 62, the first reflector 61, the filter 41, the conical tube 42, the aperture 43 and the first detector 44 sequentially form a laser receiving system of the phase method, such as Figure 2 As shown, the entire receiving process includes: the second dual-wavelength echo laser reflected and scattered by the target is received by the first collimator group 13, the laser beam width is reduced to a certain extent after passing through the first collimator group 13, and then incident on the first prism 64, deflected by the first prism 64, and incident on the first lens 63; the E-area laser passing through the first lens 63 will be reflected by the second reflector 62, reflected by the first reflector 61, and the filter 41 will filter out the laser of the wavelength corresponding to the second laser 32, and focus on the photosensitive surface of the first detector 44. The U-area laser passing through the first lens 63 will be reflected by the second reflector 62, reflected by the first reflector 61 (the rest is small hole leakage), the filter 41 will filter out the laser of the wavelength corresponding to the second laser 32, and reflected by the conical tube 42, and collected on the photosensitive surface of the first detector 44.

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

[0068] In one embodiment, the second optical component 70 includes a second prism 71 and a third lens 72. The second dual-wavelength echo laser is deflected by the second prism 71 and passed through the third lens 72 to be received by the second distance measuring component 50. The second distance measuring component 50 includes a second detector.

[0069] Optionally, the second collimating lens group 23 is used to receive the second dual-wavelength echo light beam and has the effect of reducing the beam diameter to a certain extent.

[0070] Optionally, the second prism 71 is used for beam steering so that the second dual-wavelength echo beam is incident on 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 may be a silicon-based detector, which is the same as the first detector 44 described above and will not be described in detail here.

[0072] The second collimator lens group 23, the second prism 71, the third lens 72 and the second detector sequentially form a laser receiving system of the time-of-flight method, such as Figure 2 As shown, the entire receiving process includes: the second dual-wavelength echo light beam reflected and scattered by the target is received by the second collimator group 23, the width of the laser light beam passing through the second collimator group 23 is reduced to a certain extent, and then enters the second prism 71, is deflected by the second prism 71, and enters the third lens 72. The third lens 72 focuses the laser on the photosensitive surface of the second detector.

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

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

[0075] 1. Dual-mode with dual-wavelength laser frequency (clock frequency) setting: the optical wave modulator only modulates the laser required for the phase ranging algorithm, and the other wavelength laser will be filtered out by the filter; the time-of-flight ranging method receives dual-wavelength lasers, because the two signal clocks are synchronized, the two signals overlap, which has the effect of enhancing the signal.

[0076] 2. Dual-mode with dual-wavelength laser at the same frequency (different clock frequencies): the optical wave modulator modulates two wavelengths of laser, one as a reference wave for signal processing and combined with the signal wave for ranging to form a special signal distribution, which improves the noise resistance and positioning accuracy, thereby increasing the ranging range and improving the ranging accuracy; time-of-flight ranging receives dual-wavelength lasers, and the two wavelengths of lasers serve as reference waves for each other in the signal processing system of the receiving system, which improves the noise resistance and positioning accuracy, thereby increasing the ranging range and improving the ranging accuracy.

[0077] See also Figure 6 and Figure 7 , Figure 6 is a structural schematic diagram of a second embodiment of a distance measuring device provided by the present application, Figure 7 yes Figure 6 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 .

[0078] The first telescope assembly 10 includes a first eyepiece 11, a first focusing lens 12, and a first collimating lens group 13, which are sequentially arranged along the 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, which are sequentially arranged along the second optical axis. The first focusing lens 12 and the first collimating lens group 13 are combined to form a first objective lens, and the second focusing lens 22 and the second collimating lens group 23 are combined to form a second objective lens.

[0079] 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 .

[0080] The first optical component 60 includes a first reflector 61 , a first lens 63 and a first prism 64 .

[0081] The second optical component 70 includes a second prism 71 and a third lens 72 .

[0082] The first distance measuring component 40 includes a first detector 44 , a filter 41 , a conical tube 42 and an aperture 43 .

[0083] The second distance measuring component 50 includes a second detector.

[0084] It can be understood that the difference between this embodiment and the first embodiment is that the second reflector may not be provided by changing the optical path.

[0085] The first laser 31, the second laser 32, the beam combiner 33, the second lens 34, the first reflector 61, the first lens 63, the first prism 64 and the first collimator lens group 13 sequentially form a laser emission system. Figure 6 As shown, the entire emission process includes: the first laser 31 and the second laser 32 emit near-infrared light, the two laser beams are combined into one light beam in the beam combiner 33, the combined laser beam is focused by the second lens 34 at the small hole of the first reflector 61, and passes through unobstructed, the laser beam passing through the small hole is collimated through the U area of ​​the first lens 63 and emitted to the first prism 64, turned by the first prism 64, and incident on the first collimating lens group 13, collimated again, and emitted highly collimated laser beam.

[0086] The first collimator lens group 13, the first prism 64, the first lens 63, the first reflector 61, the filter 41, the conical tube 42, the aperture 43 and the first detector 44 sequentially form a laser receiving system of the phase method, such as Figure 7 As shown, the entire receiving process includes: the second dual-wavelength echo laser reflected and scattered by the target is received by the first collimator group 13, the laser beam width passing through the first collimator group 13 is reduced to a certain extent, and then incident on the first prism 64, deflected by the first prism 64, and incident on the first lens 63; the E-area laser passing through the first lens 63 will be reflected by the first reflector 61 in sequence, the filter 41 will filter out the laser of the wavelength corresponding to the second laser 32, and focus on the photosensitive surface of the first detector 44. The U-area laser passing through the first lens 63 will be reflected by the second reflector 62 in sequence, the first reflector 61 will reflect a part (the rest is small hole leakage), the filter 41 will filter out the laser of the wavelength corresponding to the second laser 32, and the conical tube 42 will reflect, and collect on the photosensitive surface of the first detector 44.

[0087] See also Figure 8 , Figure 8 The third embodiment of the distance measuring device provided by the present application is a schematic diagram of the structure of the distance measuring device 100. 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] The first telescope assembly 10 includes a first eyepiece 11, a first focusing lens 12, and a first collimating lens group 13, which are sequentially arranged along the 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, which are sequentially arranged along the second optical axis. The first focusing lens 12 and the first collimating lens group 13 are combined to form a first objective lens, and the second focusing lens 22 and the second collimating lens group 23 are combined 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 a dual-wavelength combined laser, which is then emitted through the second lens 34 .

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

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

[0092] The first distance measuring component 40 includes a first detector 44 and a filter 41 .

[0093] The second distance measuring component 50 includes a second detector.

[0094] It can be understood that the difference between this embodiment and the first embodiment is that the conical tube and the aperture are not provided.

[0095] The first collimator lens group 13, the first prism 64, the first lens 63, the first reflector 61, the filter 41 and the first detector 44 sequentially form a laser receiving system of the phase method, such as Figure 7 As shown, the entire receiving process includes: the second dual-wavelength echo laser reflected and scattered by the target is received by the first collimator group 13, the laser beam width passing through the first collimator group 13 is reduced to a certain extent, and then incident on the first prism 64, deflected by the first prism 64, and incident on the first lens 63; the E-area laser passing through the first lens 63 will be reflected by the first reflector 61 in turn, the filter 41 will filter out the laser of the wavelength corresponding to the second laser 32, and focus on the photosensitive surface of the first detector 44. The U-area laser passing through the first lens 63 will be reflected by the second reflector 62 in turn, the first reflector 61 will reflect a part (the rest is small hole leakage), the filter 41 will filter out the laser of the wavelength corresponding to the second laser 32, and collect it on the photosensitive surface of the first detector 44.

[0096] It can be understood that the ranging device 100 provided in the embodiment of the present application can be applied to binocular telescopes. In addition to binocular telescopes, it can also be applied to camera and lidar fusion perception systems in new energy vehicles, and settlement and deformation health monitoring systems for bridges, tunnels, railways, buildings, etc.

[0097] The power supply control device, power supply control method and power supply system provided in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A distance measuring device, characterized in that: The distance measuring device comprises: A first telescopic component, wherein the first telescopic component forms a first optical path for human eyes to telescope; A second telephoto component, the second telephoto component forms a second optical path for human eye telescopic viewing; A light source assembly, wherein the light source assembly is configured to generate a dual-wavelength combined laser beam, and the dual-wavelength combined laser beam is emitted via the first optical path; A first distance measuring component, wherein the first distance measuring component is configured to receive the first dual-wavelength echo laser that is reflected by the dual-wavelength combined laser through the target and passes through the first optical path, and measure a first distance of the target by a phase method; The second distance measuring component is configured to receive the second dual-wavelength echo laser that is reflected by the dual-wavelength combined laser through the target and passes through the second optical path, and measure the second distance of the target through the time-of-flight method.

2. The distance measuring device according to claim 1, characterized in that: The distance measuring device further comprises a first optical component, which is arranged on the outgoing light path of the light source component and on the incident light path of the first distance measuring component; The first optical component is configured to change the optical path of the dual-wavelength combined laser beam so that the dual-wavelength combined laser beam is emitted through the first optical path; and The first optical component is configured to change an optical path of the first dual-wavelength echo laser so that the first distance measuring component receives the first dual-wavelength echo laser.

3. The distance measuring device according to claim 2, characterized in that: The first optical component comprises: A first reflector is disposed outside the first optical path, wherein the first reflector comprises a through hole; A first lens, disposed outside the first optical path; A first prism, disposed on the first optical path; The dual-wavelength combined laser beam generated by the light source assembly is redirected to the first optical path via the through hole of the first reflector, the first lens, and the first prism; The first dual-wavelength echo laser is deflected by the first prism, passes through the first lens, and is reflected by the first reflector to be received by the first distance measuring component.

4. The distance measuring device according to claim 3, characterized in that: The first optical component further includes a second reflector disposed outside the first optical path; The dual-wavelength combined laser beam generated by the light source assembly passes through the through hole of the first reflector, is reflected by the second reflector, passes through the first lens, and is turned to the first optical path through the first prism; The first dual-wavelength echo laser is deflected by the first prism, passes through the first lens, is reflected by the second reflector, and is reflected by the first reflector to be received by the first ranging component.

5. The distance measuring device according to claim 3, characterized in that: The first telescopic assembly includes a first eyepiece, a first focusing lens, and a first collimating lens group which are sequentially arranged along a first optical axis, and the first prism is arranged between the first focusing lens and the first collimating lens group.

6. The distance measuring device according to any one of claims 1 to 5, characterized in that: The light source assembly includes a first laser, a second laser, a beam combining mirror and a second lens. The laser light generated by the first laser and the laser light generated by the second laser are combined by the beam combining mirror to form the dual-wavelength combined laser light, which is then emitted through the second lens.

7. The distance measuring device according to any one of claims 1 to 5, characterized in that: The first distance measuring component includes a first detector, a filter, a conical tube and an aperture. The first dual-wavelength echo laser is received by the first detector after passing through the filter, the conical tube and the aperture in sequence.

8. The distance measuring device according to claim 1, characterized in that: The distance measuring device also includes a second optical component, which is arranged on the incident light path of the second distance measuring component, and the second optical component is configured to change the light path of the second dual-wavelength echo laser so that the second distance measuring component receives the second dual-wavelength echo laser.

9. The distance measuring device according to claim 8, characterized in that: The second optical component comprises: A second prism is arranged on the second optical path; A third lens is arranged outside the second optical path; The second dual-wavelength echo laser is deflected by the second prism and passes through the third lens to be received by the second distance measuring component.

10. The distance measuring device according to claim 8, characterized in that: The second telescopic assembly comprises a second eyepiece, a second focusing lens and a second collimating lens group which are sequentially arranged along a second optical axis, and the second prism is arranged between the second focusing lens and the second collimating lens group.

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