WO2021184398A1

WO2021184398A1 - Laser ranging device

Info

Publication number: WO2021184398A1
Application number: PCT/CN2020/080816
Authority: WO
Inventors: 刘崇求; 范益群
Original assignee: 金华市蓝海光电技术有限公司
Priority date: 2020-03-17
Filing date: 2020-03-24
Publication date: 2021-09-23
Also published as: CN111239751A

Abstract

Disclosed is a laser ranging device, comprising a monocular telescope, a laser transmitting system, a laser receiving system, and a scanner. Laser emitted by the laser transmitting system is reflected by the scanner and is then emitted to a measured target, and the laser reflected back by the measured target is received by the laser receiving system; the monocular telescope is used for framing of the measured target. According to the present invention, region scanning can be carried out on a measured target, the difficulty of aiming is greatly reduced, and the capturing speed is improved.

Description

Laser distance measuring device

Technical field

The invention belongs to the technical field of rangefinders, and more specifically relates to a laser rangefinder.

Background technique

Laser rangefinders are popular among golfers, hunters and outdoor activists due to their ranging and observation performance. Laser rangefinders have been widely used in golf courses to measure target distances, especially the distance of holes.

The laser rangefinder does not rely on GPS coordinates, but its accuracy is easily affected by the user's operating equipment. Usually, the user points the laser rangefinder at the object through the center of the viewfinder. Once the object is in the center, the user activates the laser beam, which is emitted by the device towards the target object. The laser beam is reflected by the object, and a part of it returns to the device. The device calculates and displays the distance of the target object based on, for example, the time difference of the return of the laser beam. When the user is in use, due to the handheld mode, the user cannot accurately lock the aiming target and ensure that the laser beam is directed to the correct object.

In addition, although some existing rangefinders have advanced functions, such as ARC (angle range compensation) and multi-distance capabilities, they can display the distance to the nearest target in multiple objects, so as to measure the distance to the flagpole instead of the background. The target still cannot solve the aiming problem, which increases the difficulty and time for the user to capture the correct distance.

Therefore, how to provide a laser ranging device with low aiming difficulty is an urgent problem for those skilled in the art to solve.

Summary of the invention

In view of this, the present invention provides a laser ranging device, which can realize area scanning of the measured target, greatly reduces the difficulty of aiming, and improves the capture speed.

In order to achieve the above objectives, the present invention adopts the following technical solutions:

A laser ranging device includes: a monocular telescope, a laser emitting system, a laser receiving system, and a scanner. The laser light reflected by the target is received by the laser receiving system; the monocular telescope is used for framing of the measured target.

Preferably, the scanner can rotate and scan around the center of the viewfinder to change the emitting direction of the laser, and the laser scan covers the scan frame area of the viewfinder.

Preferably, the scanner includes a resonant scanning mirror, a MEMS mirror, a one-dimensional galvanometer mirror or a swing mirror.

Preferably, the monocular telescope includes an objective lens, a roof half pentaprism, a cemented prism, an eyepiece group, and a display unit arranged at the focal plane position of the eyepiece group, and visible light passes through the objective lens, the roof half pentaprism, and the The glued prism and the display unit enter the eyepiece.

Preferably, the laser emitting system includes a semiconductor laser transmitter, a first emitting lens, and a second emitting lens. The laser light emitted by the semiconductor laser transmitter is emitted through the first emitting lens and the second emitting lens in sequence.

Preferably, the scanner is arranged between the first emitting lens and the second emitting lens.

Preferably, the laser receiving system includes a receiving lens, a filter, and a photoreceiving tube, and the reflected laser light is received by the photoreceiving tube after sequentially passing through the receiving lens and the filter.

Preferably, the semiconductor laser transmitter emits laser light, passes through the first transmission lens, the scanner reflection, and the second transmission lens. , After cementing the prism, it is received by the photoelectric receiving tube after receiving lens and filter.

Preferably, the semiconductor laser transmitter emits laser light, passes through the first transmission lens, the scanner reflection, and the second transmission lens, and then exits. After reaching the measured target, the optical signal is reflected, and the reflected optical signal passes through the receiving lens and the filter in turn. After that, it is received by the photoelectric receiving tube.

Preferably, the semiconductor laser transmitter emits laser light, passes through the first transmission lens, the scanner reflection, and the second transmission lens, and then sequentially passes through the cemented prism, the roof half-pentaprism, and the objective lens. The optical signal reaches the measured target. The reflected and reflected light signals pass through the receiving lens and the optical filter in turn, and then are received by the photoelectric receiving tube.

The beneficial effects of the present invention are:

By setting the scanner, the present invention can realize the area scanning of the measured target, greatly reduce the difficulty of aiming, increase the capture speed, and solve the problem that the traditional rangefinder cannot accurately lock the aiming target and capture the correct distance and capture time. Long question.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work.

Figure 1 is a schematic diagram of the structure of Embodiment 1 of the present invention.

Figure 2 is a schematic diagram of the structure of Embodiment 2 of the present invention.

Fig. 3 is a schematic diagram of the structure of Embodiment 3 of the present invention.

Fig. 4 is a structural diagram of the circular scanning method of the present invention.

Fig. 5 is a structural diagram of the square scanning method of the present invention.

Fig. 6 is a schematic diagram of the structure of the scanning frame area of the present invention.

Fig. 7 is a state diagram of the angle adjustment of the scanner of the present invention.

Fig. 8 is a combined diagram of the reflected laser light under the condition of three deflection angles in Fig. 7 of the scanner of the present invention.

Among them, in the figure,

1-objective lens; 2-roof half pentaprism; 3- cemented prism; 4- display unit; 5-eyepiece group; 6-transmitting lens one; 7-transmitting lens two; 8-scanner; 9-receiving lens; 10- Filter; 11-photoelectric receiving tube; 12-semiconductor laser transmitter.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Example 1

Referring to Figure 1, the present invention provides a laser ranging device, including: a monocular telescope, a laser emitting system, a laser receiving system and a scanner 8. The laser emitting system emits laser light after being reflected by the scanner 8. On the measured target, the laser light reflected by the measured target is received by the laser receiving system; the monocular telescope is used for framing of the measured target.

In order to further optimize the above technical solution, as shown in FIG. 7, the scanner 8 can rotate and scan around the center of the viewfinder to change the emitting direction of the laser, and the laser scan covers the scan frame area of the viewfinder. In Fig. 7(a), the angle between the scanner 8 and the laser incident direction is 45°, in Fig. 7(b), the angle between the scanner 8 and the laser incident direction is 48.5°, and in Fig. 7(c), the scanning The angle between the device 8 and the incident direction of the laser is 41.5°. Fig. 8 is a combined view of the reflected laser light of the scanner 8 under the conditions of the above three deflection angles, which greatly increases the range of the scanning area. In addition, the angle between the scanner 8 and the laser incident direction is not limited to 45°, 48.5°, 41.5°, and can be continuously changed within a certain angle range.

In order to further optimize the above technical solution, the scanner 8 includes a resonant scanning mirror, a MEMS mirror, a one-dimensional galvanometer mirror or a swing mirror. As shown in Fig. 4 and Fig. 5, by selecting different scanners 8 and cooperating with software control, different scanning methods, such as square or round, can be generated.

The monocular telescope includes an objective lens 1, a roof half pentaprism 2, a cemented prism 3, an eyepiece group 5 and a display unit 4 arranged at the focal plane of the eyepiece group 5. The visible light passes through the objective lens 1, the roof half pentaprism 2, the cemented prism 3, The display unit 4 enters the eyepiece. Among them, the display unit 4 is a liquid crystal display or an organic light emitting diode OLED.

The cemented prism includes an isosceles trapezoidal prism and a triangular prism. The cemented prism is formed by cementing the hypotenuse of an isosceles trapezoidal prism and a triangular prism, or by cementing the top surface of an isosceles trapezoidal prism and a triangular prism.

In addition, the present invention is not limited to monocular telescopes, and binocular telescopes can also be used.

The laser emission system includes a semiconductor laser transmitter 12, a transmitter lens 6, and a transmitter lens 7. The laser light emitted by the semiconductor laser transmitter 12 passes through the transmitter lens 6 and the transmitter lens 2 in turn and then emits. The scanner 8 is arranged between the first emission lens 6 and the second emission lens 7.

The laser receiving system includes a receiving lens 9, a filter 10 and a photoelectric receiving tube 11, and the reflected laser light passes through the receiving lens 9 and the filter 10 in turn and is received by the photoelectric receiving tube 11.

The semiconductor laser transmitter 12 emits laser light, passes through the emission lens 6 to transmit, the scanner 8 reflects, and the emission lens 2 7 to transmit. The light signal is reflected after reaching the measured target. The reflected light signal passes through the objective lens 1 and the roof half pentaprism in turn. 2. After the prism 3 is glued, it is received by the photoelectric receiving tube 11 after the receiving lens 9 and the filter 10.

By setting the scanner 8 in the present invention, it can realize the area scanning of the measured target, greatly reduce the difficulty of aiming, increase the capture speed, and solve the problem that the traditional rangefinder cannot accurately lock the aiming target and capture the correct distance. Long time issue. When observing the measured target with a rangefinder, there must be no obstructions in front of the measured target. The present invention can set the area in a certain area, and first identify the objects that fall within the area, and the measured target is the closest object. Easily capture the distance to the measured target, and the area size can be adjusted according to actual application scenarios.

For example, in the actual golf course, as shown in Figure 6, the traditional rangefinder needs to aim the center frame at the flag, and the distance of the flag can only be obtained when aiming. The handheld rangefinder is difficult to stabilize within this range; however, the present invention Through the adjustment of the angle of the scanner, the area scanning of the flag is realized. As shown in Figure 6(d), there are no other targets within a 5-meter radius around the flag, and the flag only needs to fall into Figure 6(a) and Figure 6( b) The four-corner frame in Figure 6(c) or Figure 6(d) can be identified, and the size of the four-corner frame can be adjusted according to the environment of the golf course. In addition, the object to be measured in the present invention is not limited to a flag, but may also be some other objects to be measured.

Example 2

Referring to FIG. 2, the difference between this embodiment and Embodiment 1 is that the positions of the laser emitting system and the laser receiving system are different. In this embodiment, the semiconductor laser transmitter 12 emits laser light, passes through the emission lens 6 to transmit, the scanner 8 reflects, and the emission lens 2 7 to transmit. After the filter 10, it is received by the photoelectric receiving tube 11.

Example 3

Referring to FIG. 3, the difference between this embodiment and Embodiment 1 is that the laser emitting system and the laser receiving system are arranged at different positions. In this embodiment, the semiconductor laser transmitter 12 emits laser light, passes through the emission lens 6, the scanner 8, and the emission lens 2, and then passes through the cemented prism 3, the roof half pentaprism 2, and the objective lens 1, and then emits it. After the target is measured, the optical signal is reflected, and the reflected optical signal passes through the receiving lens 9 and the optical filter 10 in turn, and then is received by the photoelectric receiving tube 11.

The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this document, but should conform to the widest scope consistent with the principles and novel features disclosed in this document.

Claims

A laser distance measuring device, which is characterized by comprising: a monocular telescope, a laser emitting system, a laser receiving system and a scanner, wherein the laser emitting system emits laser light which is reflected by the scanner and then hits the target to be measured , The laser light reflected by the measured target is received by the laser receiving system; the monocular telescope is used for framing of the measured target.
The laser distance measuring device according to claim 1, wherein the scanner can rotate and scan around the center of the viewfinder to change the emitting direction of the laser, and the laser scan covers the scan frame area of the viewfinder.
The laser distance measuring device according to claim 2, wherein the scanner comprises a resonant scanning mirror, a MEMS mirror, a one-dimensional galvanometer mirror or a swing mirror.
The laser distance measuring device according to claim 1, wherein the monocular telescope comprises an objective lens, a roof half pentaprism, a cemented prism, an eyepiece group and a display unit arranged at the focal plane position of the eyepiece group, The visible light enters the eyepiece through the objective lens, the roof half pentaprism, the cemented prism, and the display unit in sequence.
The laser distance measuring device according to claim 1 or 2, wherein the laser emitting system includes a semiconductor laser transmitter, a first emitting lens, and a second emitting lens, and the laser light emitted by the semiconductor laser transmitter passes through After launching lens one and launching lens two, it is emitted.
The laser distance measuring device according to claim 5, wherein the scanner is arranged between the first emitting lens and the second emitting lens.
The laser distance measuring device according to claim 6, wherein the laser receiving system includes a receiving lens, a filter, and a photoelectric receiving tube, and the reflected laser light sequentially passes through the receiving lens and the filter. The film is received by the photoelectric receiving tube.
The laser distance measuring device according to claim 7, wherein the semiconductor laser emitter emits laser light, which is transmitted through the first transmission lens, reflected by the scanner, and transmitted through the second transmission lens. Signal reflection, the reflected light signal passes through the objective lens, the roof half pentaprism, the cemented prism, and then passes through the receiving lens and filter, and then is received by the photoelectric receiving tube.
The laser distance measuring device according to claim 7, wherein the semiconductor laser emitter emits laser light, which is transmitted through the first transmission lens, reflected by the scanner, and transmitted through the second transmission lens. The signal is reflected, and the reflected light signal is received by the photoelectric receiving tube after passing through the receiving lens and the filter in turn.
The laser distance measuring device according to claim 7, wherein the semiconductor laser emitter emits laser light, passes through the first transmission lens, the scanner reflects, and the second transmission lens, and then sequentially passes through the cemented prism and the roof ridge. Half pentaprism, the objective lens emits, the optical signal is reflected after reaching the measured target, and the reflected optical signal is received by the photoelectric receiving tube after passing through the receiving lens and the filter in turn.