Laser rangefinder and ranging system

Abstract

The present invention discloses a laser rangefinder, comprising a framing light splitting component, a light combining component, a distance measuring component and an eyepiece; the light combining component comprises a display optical path and a polarizing cube; the display optical path is a transmission optical path of the data visual signal; the data visual signal passes through the display optical path, is incident on the first incident surface of the polarizing cube, is then transmitted through the polarizing surface of the polarizing cube, is emitted from the exit surface of the polarizing cube, and reaches the eyepiece; the image visual signal is incident on the second incident surface of the polarizing cube, is then reflected by the polarizing surface of the polarizing cube, is emitted from the exit surface of the polarizing cube, and reaches the eyepiece. The present invention is based on the existing laser rangefinder, and a light combining component is added, so that the image visual signal including the picture and the crosshairs and the data visual signal including the measured distance number overlap, thereby improving the measurement efficiency and portability, and improving the measurement accuracy.

Description

Technical Field

[0001] The invention relates to the field of laser surveying and mapping, and in particular to a laser rangefinder and a range-measuring system. Background Art

[0002] When the laser rangefinder is working, it emits a laser beam to the target, and the photoelectric element receives the laser beam reflected by the target. Then, the time from the emission to the reception of the laser beam is measured by a timer to calculate the distance from the observer to the target. After measuring the distance to the target, the existing rangefinder needs an additional component to display the distance between the target and the observer, which is usually a display screen independent of the eyepiece of the laser rangefinder. This requires the operator to first calibrate with the naked eye, align the crosshairs or ruler in the eyepiece with the point to be measured, and then take the eyes away from the eyepiece and turn to look at the distance number displayed on the display screen. As a result, such a rangefinder is inconvenient to measure or carry, and the measurement efficiency is not high. More importantly, during the period from the operator's eyes leaving the eyepiece to recognizing the distance number on the display screen, the measurement position of the rangefinder may be offset due to hand shaking or unstable support, resulting in inaccurate measurement.

[0003] Therefore, how to solve the inconvenience and low efficiency of reading distance measurement data in the prior art and improve the distance measurement accuracy has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0004] The purpose of the present invention is to provide a laser rangefinder and a rangefinder system to solve the problems of low measurement efficiency and poor measurement accuracy in the prior art.

[0005] In order to solve the above technical problems, the present invention provides a laser rangefinder, comprising a framing light splitting component, a light combining component, a distance measuring component and an eyepiece;

[0006] The framing light splitting component receives an incident light signal of a corresponding visual area, and obtains a laser ranging signal and an image visual signal through the incident light signal;

[0007] The distance measuring component obtains a data visual signal according to the laser distance measuring signal, and sends the data visual signal through a display screen of the distance measuring component;

[0008] The light combining assembly includes a display light path and a polarizing cube;

[0009] The display optical path is a transmission optical path of the data visual signal;

[0010] The data visual signal passes through the display optical path, is incident on the first incident surface of the polarizing cube, is transmitted through the polarizing surface of the polarizing cube, is emitted from the exit surface of the polarizing cube, and reaches the eyepiece;

[0011] The image visual signal is incident on the second incident surface of the polarizing cube, then reflected by the polarizing surface of the polarizing cube, emitted from the exit surface of the polarizing cube, and reaches the eyepiece.

[0012] Optionally, in the laser rangefinder, the framing beam splitting component includes a framing optical path and a beam splitting prism group;

[0013] The framing optical path is a transmission optical path of the incident light signal;

[0014] The beam splitter prism group includes a front beam splitter right angle prism, a middle beam splitter right angle prism and a rear beam splitter right angle prism;

[0015] The second right-angle surface of the front beam-splitting right-angle prism is bonded to the hypotenuse surface of the middle beam-splitting right-angle prism;

[0016] The second right-angle surface of the middle beam-splitting right-angle prism is bonded to the hypotenuse surface of the rear beam-splitting right-angle prism, wherein a beam-splitting polarizing film is provided between the second right-angle surface of the middle beam-splitting right-angle prism and the hypotenuse surface of the rear beam-splitting right-angle prism;

[0017] The incident light signal reaches the first right-angle surface of the front beam splitter right-angle prism through the framing light path, and the distance measuring laser signal reaches the receiver of the distance measuring component through the first right-angle surface of the rear beam splitter right-angle prism.

[0018] Optionally, in the laser rangefinder, the framing optical path includes a framing convex lens and a framing concave lens.

[0019] Optionally, in the laser rangefinder, the polarizing cube includes a front light-combining right-angle prism, a rear light-combining right-angle prism and a composite polarizing film;

[0020] The hypotenuse surface of the front light-combining right-angle prism and the hypotenuse surface of the rear light-combining right-angle prism are fixedly connected through the composite polarizing film.

[0021] Optionally, in the laser rangefinder, the right-angle prism in the laser rangefinder is a ground prism.

[0022] Optionally, in the laser rangefinder, the display optical path includes a display convex lens and a display concave lens.

[0023] Optionally, in the laser rangefinder, the display optical path further includes an adjustment lens;

[0024] The adjustment lens is disposed between the display convex lens and the display concave lens.

[0025] Optionally, in the laser rangefinder, the display screen is an LED display screen.

[0026] Optionally, in the laser rangefinder, the laser rangefinder is a handheld rangefinder.

[0027] A distance measuring system, comprising a laser rangefinder as described in any one of the above.

[0028] The laser rangefinder provided by the present invention comprises a framing light splitting component, a light combining component, a rangefinder component and an eyepiece; the framing light splitting component receives an incident light signal of a corresponding visual field, and obtains a laser rangefinder signal and an image visual signal through the incident light signal; the rangefinder component obtains a data visual signal according to the laser rangefinder signal, and sends the data visual signal through a display screen of the rangefinder component; the light combining component comprises a display optical path and a polarizing cube; the display optical path is a transmission optical path of the data visual signal; the data visual signal passes through the display optical path, is incident on a first incident surface of the polarizing cube, is transmitted through the polarizing surface of the polarizing cube, is emitted from an exit surface of the polarizing cube, and reaches the eyepiece; the image visual signal is incident on a second incident surface of the polarizing cube, is reflected by the polarizing surface of the polarizing cube, is emitted from an exit surface of the polarizing cube, and reaches the eyepiece.

[0029] The present invention adds the light combining component on the basis of the existing laser rangefinder, so that the image visual signal including the screen and the sight and the data visual signal including the measured distance digital overlap, so that the staff can directly see the distance from the position to the laser rangefinder in the eyepiece while aiming at the position to be measured through the eyepiece, thereby improving the measurement efficiency, improving the integration of the equipment, and thus improving the portability. At the same time, because the operator can see the measurement result while aiming, the measurement accuracy is greatly improved. The present invention also provides a distance measurement system with the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic structural diagram of a specific implementation of the laser rangefinder provided by the present invention;

[0032] Figure 2 A schematic structural diagram of another specific implementation of the laser rangefinder provided by the present invention;

[0033] Figure 3A left side view of a combination of a polarizing cube and a beam splitter prism group of a specific embodiment of the laser rangefinder provided by the present invention;

[0034] Figure 4 A front view of a combination of a polarizing cube and a beam splitter prism group of a specific embodiment of the laser rangefinder provided by the present invention. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] The core of the present invention is to provide a laser rangefinder, a structural schematic diagram of a specific implementation method thereof is shown as follows: Figure 1 As shown, it is called the specific implementation mode 1, which includes a framing light splitting component 100, a light combining component, a distance measuring component and an eyepiece 400;

[0037] The framing light splitting component 100 receives an incident light signal of a corresponding visual area, and obtains a laser ranging signal and an image visual signal through the incident light signal;

[0038] The distance measuring component obtains a data visual signal according to the laser distance measuring signal, and sends the data visual signal through the display screen 320 of the distance measuring component;

[0039] The light combining assembly includes a display light path 210 and a polarizing cube 220;

[0040] The display optical path 210 is a transmission optical path for the data visual signal;

[0041] The data visual signal passes through the display optical path 210, is incident on the first incident surface of the polarizing cube 220, is transmitted through the polarizing surface of the polarizing cube 220, is emitted from the exit surface of the polarizing cube 220, and reaches the eyepiece 400;

[0042] The image visual signal is incident on the second incident surface of the polarizing cube 220 , and then reflected by the polarizing surface of the polarizing cube 220 , and is emitted from the exit surface of the polarizing cube 220 to reach the eyepiece 400 .

[0043] As a preferred embodiment, the polarizing cube 220 includes a front light-combining right-angle prism 221, a rear light-combining right-angle prism 222, and a composite polarizing film;

[0044] The hypotenuse surface 043 of the front light-combining right-angle prism 221 and the hypotenuse surface of the rear light-combining right-angle prism 222 are fixedly connected via the composite polarizing film.

[0045] The polarizing cube 220 can be formed by laminating two separate right-angle prisms. It can be seen from other improvements to the present invention described below that the right-angle prisms with the same specifications can be uniformly used. The production cost can be greatly reduced due to the scale effect. The composite polarizing film can be a dielectric multilayer polarizing film. Of course, it can also be modified according to actual needs.

[0046] The polarizing cube 220 is a polarization splitting cube, and the composite polarizing film is a splitting film.

[0047] Then, the first incident surface of the polarizing cube 220 is the first right-angle surface 041 of the front light-combining right-angle prism 221, the second incident surface of the polarizing cube 220 is the first right-angle surface 051 of the rear light-combining right-angle prism 222, the exit surface of the polarizing cube 220 is the second right-angle surface 052 of the rear light-combining right-angle prism 222, and the polarizing surface of the polarizing cube 220 is formed by bonding the hypotenuse surface 043 of the front light-combining right-angle prism 221 and the hypotenuse surface 053 of the rear light-combining right-angle prism 222 through a polarizing coating.

[0048] In addition, the display optical path 210 includes a display convex lens 212 and a display concave lens 211; the data visual signal sent by the display screen 320 is focused by the display concave lens 211 and the display convex lens 212, so that the image of the display screen 320 (i.e., the data visual signal) can be clearly displayed in the eyepiece 400 through subsequent optical components.

[0049] Furthermore, the display optical path 210 further includes an adjustment lens 213;

[0050] The adjustment lens 213 is disposed between the display convex lens 212 and the display concave lens 211 .

[0051] The adjustment lens 213 is used to assist in focusing, so as to further reduce the optical path length required in the process of adjusting the data visual signal to be clearly visible, and further reduce the space occupied by the display optical path 210, which is conducive to miniaturization of the device.

[0052] Furthermore, the display screen 320 is an LED display screen 320; the LED display screen 320 has a small thickness and high brightness, and its image is clearly visible in a daytime environment, which is more suitable for the laser visual ranging scenario in the present invention. Of course, other types of display screens 320 can also be selected according to actual conditions.

[0053] Finally, the laser rangefinder is a handheld rangefinder. Since the display screen 320 for viewing the distance is integrated into the device in this application, the distance can be visually seen through the eyepiece 400 when observing the location to be measured, which facilitates the integration of the device. The handheld rangefinder can greatly improve the portability of the device and expand the use scenarios of the laser rangefinder.

[0054] Figure 1 The display screen 320 and the receiver 310 are connected via an external circuit, which is not shown in the figure.

[0055] The laser rangefinder provided by the present invention comprises a framing light splitting component 100, a light combining component, a distance measuring component and an eyepiece 400; the framing light splitting component 100 receives an incident light signal of a corresponding visual field, and obtains a laser distance measuring signal and an image visual signal through the incident light signal; the distance measuring component obtains a data visual signal according to the laser distance measuring signal, and sends the data visual signal through a display screen 320 of the distance measuring component; the light combining component comprises a display optical path 210 and a polarizing cube 220; the display optical path 2 10 is a transmission optical path of the data visual signal; the data visual signal passes through the display optical path 210, is incident on the first incident surface of the polarizing cube 220, and then transmits the polarizing surface of the polarizing cube 220, and is emitted from the exit surface of the polarizing cube 220 to reach the eyepiece 400; the image visual signal is incident on the second incident surface of the polarizing cube 220, and then is reflected by the polarizing surface of the polarizing cube 220, and is emitted from the exit surface of the polarizing cube 220 to reach the eyepiece 400. The present invention adds the light combining component on the basis of the existing laser rangefinder, so that the image visual signal including the screen and the crosshairs and the data visual signal including the measured distance number overlap, so that the staff can directly see the distance from the position to the laser rangefinder in the eyepiece 400 while aiming at the position to be measured through the eyepiece 400, thereby improving the measurement efficiency, improving the integration of the equipment, and thus improving the portability. At the same time, because the operator can see the measurement result while aiming, the measurement accuracy is greatly improved.

[0056] On the basis of the first embodiment, the framing light splitting component 100 is further improved to obtain a second embodiment, the structural diagram of which is shown in FIG. Figure 2 As shown, it includes a framing light splitting component 100, a light combining component, a distance measuring component and an eyepiece 400;

[0057] The framing light splitting component 100 receives an incident light signal of a corresponding visual area, and obtains a laser ranging signal and an image visual signal through the incident light signal;

[0058] The distance measuring component obtains a data visual signal according to the laser distance measuring signal, and sends the data visual signal through the display screen 320 of the distance measuring component;

[0059] The light combining assembly includes a display light path 210 and a polarizing cube 220;

[0060] The display optical path 210 is a transmission optical path for the data visual signal;

[0061] The data visual signal passes through the display optical path 210, is incident on the first incident surface of the polarizing cube 220, is transmitted through the polarizing surface of the polarizing cube 220, is emitted from the exit surface of the polarizing cube 220, and reaches the eyepiece 400;

[0062] The image visual signal is incident on the second incident surface of the polarizing cube 220, and then reflected by the polarizing surface of the polarizing cube 220, and is emitted from the exit surface of the polarizing cube 220 to reach the eyepiece 400;

[0063] The framing light splitting component 100 includes a framing light path and a light splitting prism group;

[0064] The framing optical path is a transmission optical path of the incident light signal;

[0065] The beam splitter prism group includes a front beam splitter right angle prism 121, a middle beam splitter right angle prism 122 and a rear beam splitter right angle prism 123;

[0066] The second right-angle surface 012 of the front beam-splitting right-angle prism 121 is bonded to the hypotenuse surface 023 of the middle beam-splitting right-angle prism 122;

[0067] The second right-angle surface 022 of the middle beam-splitting right-angle prism 122 is bonded to the hypotenuse surface 033 of the rear beam-splitting right-angle prism 123, wherein a beam-splitting polarizing film is provided between the second right-angle surface 022 of the middle beam-splitting right-angle prism 122 and the hypotenuse surface 033 of the rear beam-splitting right-angle prism 123;

[0068] The incident light signal reaches the first right-angle surface 011 of the front beam splitting right-angle prism 121 through the framing light path, and the distance measuring laser signal reaches the receiver 310 of the distance measuring component through the first right-angle surface 031 of the rear beam splitting right-angle prism 123 .

[0069] It should be noted that the right-angle surface of the right-angle prism in the present invention refers to the rectangular surface of the two sides of the right-angle prism that form a right angle, and the hypotenuse surface is the rectangular surface of the hypotenuse of the right angle corresponding to the right angle of the right-angle prism.

[0070] After the incident light signal is focused by the framing optical path, it is incident from the first right-angle surface 011 of the front beam splitting right-angle prism 121, and is totally reflected by the hypotenuse surface 013 of the front beam splitting right-angle prism 121, and is emitted from the second right-angle surface 012 of the front beam splitting right-angle prism 121. Since the second right-angle surface 012 of the front beam splitting right-angle prism 121 is in contact with the hypotenuse surface 023 of the middle beam splitting right-angle prism 122, the incident light signal is vertically incident from the hypotenuse surface 023 of the middle beam splitting right-angle prism 122, and is totally reflected after reaching the first right-angle surface 021 of the middle beam splitting right-angle prism 122, and is emitted from the second right-angle surface 012 of the front beam splitting right-angle prism 121. The second right-angle surface 022 is split by the light-splitting polarizing film at the second right-angle surface 022 of the middle light-splitting right-angle prism 122 to obtain the laser ranging signal and the image visual signal. The image visual signal is totally reflected at the second right-angle surface 022 of the middle light-splitting right-angle prism 122 and is emitted perpendicularly to the hypotenuse surface 023 of the middle light-splitting right-angle prism 122; while the laser ranging signal is transmitted through the second right-angle surface 022 of the middle light-splitting right-angle prism 122 and is emitted perpendicularly to the first right-angle surface 031 of the rear light-splitting right-angle prism 123, and is received by the receiver 310 to calculate the distance from the target location to the laser rangefinder.

[0071] Figure 2 This is a structural explosion diagram of the laser rangefinder of this specific implementation mode. It should be noted that: Figure 2 The dotted lines in the figure only represent the positional relationship of the relevant optical components in space, not the optical path diagram. Figure 2 Some of the optical components are spaced a certain distance apart, while others are closely fitted together. The light splitting polarizing film is not separately drawn in the exploded view; Figure 3 This is a left view of the combination of the polarizing cube 220 and the beam splitter prism assembly of this specific embodiment. Figure 4 Its front view.

[0072] In this specific embodiment, the framing spectrometer component 100 is further improved. After the corresponding incident light signal (i.e., the optical image) is focused through the framing optical path, it can be split by only three right-angle prisms, namely, the front spectrometer 121, the middle spectrometer 122, and the rear spectrometer 123. This greatly simplifies the structure for splitting the spectrometer, reduces the space occupied by the framing spectrometer component 100, and is conducive to the integration and miniaturization of the equipment.

[0073] As a specific implementation, the framing optical path includes a framing convex lens 112 and a framing concave lens 111; of course, it may further include a framing adjustment lens 213, which has the same function as the adjustment lens 213 mentioned above and will not be described in detail here.

[0074] As a preferred embodiment, the right-angle prism in the laser rangefinder described above (including specific embodiment 1 and specific embodiment 2) is a ground prism. It should be noted that the ground prism refers to grinding the edge of the right-angle prism that plays a supporting and fixing role without affecting the optical path. Please see the attached drawings of the specification for details. This makes the edge of the right-angle prism smoother, disperses stress, is less likely to be damaged by bumps, and is easy to install.

[0075] The present invention also provides a distance measurement system having the above-mentioned beneficial effects, and the distance measurement system includes a laser distance meter as described in any one of the above-mentioned embodiments. The laser distance meter provided by the present invention includes a framing light splitting component 100, a light combining component, a distance measurement component and an eyepiece 400; the framing light splitting component 100 receives an incident light signal of a corresponding field of view, and obtains a laser distance measurement signal and an image visual signal through the incident light signal; the distance measurement component obtains a data visual signal according to the laser distance measurement signal, and sends the data visual signal through the display screen 320 of the distance measurement component; the light combining component includes a display optical path 210 and a polarizing cube 220; the display optical path 2 10 is a transmission optical path of the data visual signal; the data visual signal passes through the display optical path 210, is incident on the first incident surface of the polarizing cube 220, and then transmits the polarizing surface of the polarizing cube 220, and is emitted from the exit surface of the polarizing cube 220 to reach the eyepiece 400; the image visual signal is incident on the second incident surface of the polarizing cube 220, and then is reflected by the polarizing surface of the polarizing cube 220, and is emitted from the exit surface of the polarizing cube 220 to reach the eyepiece 400. The present invention adds the light combining component on the basis of the existing laser rangefinder, so that the image visual signal including the screen and the crosshairs and the data visual signal including the measured distance number overlap, so that the staff can directly see the distance from the position to the laser rangefinder in the eyepiece 400 while aiming at the position to be measured through the eyepiece 400, thereby improving the measurement efficiency, improving the integration of the equipment, and thus improving the portability. At the same time, because the operator can see the measurement result while aiming, the measurement accuracy is greatly improved.

[0076] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the 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 method part.

[0077] It should be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0078] The laser rangefinder and the rangefinder system provided by the present invention are introduced in detail above. The principle and implementation mode of the present invention are described in detail by using specific examples. The description of the above embodiments is only used to help understand the method and the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A laser rangefinder, characterized in that: It includes a framing light splitting component, a light combining component, a distance measuring component and an eyepiece; The framing light splitting component receives an incident light signal of a corresponding visual area, and obtains a laser ranging signal and an image visual signal through the incident light signal; The distance measuring component obtains a data visual signal according to the laser distance measuring signal, and sends the data visual signal through a display screen of the distance measuring component; The light combining assembly includes a display light path and a polarizing cube; The display optical path is a transmission optical path of the data visual signal; The data visual signal passes through the display optical path, is incident on the first incident surface of the polarizing cube, is transmitted through the polarizing surface of the polarizing cube, is emitted from the exit surface of the polarizing cube, and reaches the eyepiece; The image visual signal is incident on the second incident surface of the polarizing cube, then reflected by the polarizing surface of the polarizing cube, emitted from the exit surface of the polarizing cube, and reaches the eyepiece; The framing light splitting component comprises a framing light path and a light splitting prism group; The framing optical path is a transmission optical path of the incident light signal; The beam splitter prism group includes a front beam splitter right angle prism, a middle beam splitter right angle prism and a rear beam splitter right angle prism; The second right-angle surface of the front beam-splitting right-angle prism is bonded to the hypotenuse surface of the middle beam-splitting right-angle prism; The second right-angle surface of the middle beam-splitting right-angle prism is bonded to the hypotenuse surface of the rear beam-splitting right-angle prism, wherein a beam-splitting polarizing film is provided between the second right-angle surface of the middle beam-splitting right-angle prism and the hypotenuse surface of the rear beam-splitting right-angle prism; The incident light signal reaches the first right-angle surface of the front beam splitter right-angle prism through the framing light path, and the laser ranging signal reaches the receiver of the ranging component through the first right-angle surface of the rear beam splitter right-angle prism.

2. The laser rangefinder according to claim 1, characterized in that: The framing optical path includes a framing convex lens and a framing concave lens.

3. The laser rangefinder according to claim 1, characterized in that: The polarizing cube includes a front light-combining right-angle prism, a rear light-combining right-angle prism and a composite polarizing film; The hypotenuse surface of the front light-combining right-angle prism and the hypotenuse surface of the rear light-combining right-angle prism are fixedly connected through the composite polarizing film.

4. The laser rangefinder according to any one of claims 1 to 3, characterized in that: The right-angle prism in the laser rangefinder is a ground-edge prism.

5. The laser rangefinder according to claim 1, characterized in that: The display light path includes a display convex lens and a display concave lens.

6. The laser rangefinder according to claim 5, characterized in that: The display optical path also includes an adjustment lens; The adjustment lens is disposed between the display convex lens and the display concave lens.

7. The laser rangefinder according to claim 1, characterized in that: The display screen is an LED display screen.

8. The laser rangefinder according to claim 1, characterized in that: The laser rangefinder is a handheld rangefinder.

9. A distance measurement system, characterized in that: The distance measuring system comprises the laser distance measuring device according to any one of claims 1 to 8.

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