CN216248312U - Laser range finder - Google Patents

Abstract

The utility model relates to a laser range finder, which relates to the technical field of range finders, wherein a light guide indicating piece can emit light under the condition of light incidence, so that the optical axis of a laser beam emitted by a laser range finder component can be identified, and because the laser beam emitting position of the laser range finder component and the light guide indicating piece are both positioned in an observation area of a shell, and because the observation area can transmit light, a user can check the optical axis of the laser beam identified by the light guide indicating piece after emitting light through the observation area, so as to determine the position and the direction of the laser beam, confirm the measurement starting point of the laser range finder, reduce the measurement starting point error caused by artificial operation factors, ensure the accuracy of the measurement result and meet the measurement precision requirement of people.

Description

Laser range finder

Technical Field

The utility model relates to the technical field of distance measuring instruments, in particular to a laser distance measuring instrument.

Background

The laser range finder is simple to operate, high in measuring speed and accurate, particularly the phase type laser range finder has the single measuring time of 0.5-4 seconds generally and the measuring precision of about 2 millimeters, is gradually popularized and applied in daily life of people, and becomes a good helper for daily measurement of people. However, because the internal components of the laser range finder are relatively complex, the range finder is generally in a rectangular parallelepiped form, the length of the range finder is generally about 120 mm, the thickness of the range finder is generally about 35 mm, and the width of the range finder is generally about 55 mm, and the distance measurement of the laser range finder is realized by emitting a laser beam with a diameter of about 3 mm to a measurement target, receiving laser reflected by the measurement target, and analyzing and calculating the time difference.

However, in a specific measurement process, people often cannot accurately confirm the optical axis starting point of the measurement laser, so that measurement errors are artificially increased, and finally, the accuracy of a measurement result is not high, and the measurement precision requirement of people cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a laser range finder which can determine the position and the direction of a laser beam so as to confirm the measurement starting point of the laser range finder, thereby ensuring the accuracy of the measurement result and meeting the measurement precision requirement of people.

In a first aspect, the present invention provides a laser rangefinder comprising:

a housing having a viewing area through which light can pass;

the laser ranging assembly is arranged in the shell and can emit laser beams, and the optical axes of the laser beams pass through the observation area;

leaded light indicator, set up in observation area, just the axis of leaded light indicator is followed laser beam's optical axis extends, wherein, leaded light indicator can give out light under the condition that there is the light to penetrate, with the sign laser beam's optical axis.

In some embodiments, the light-guiding indicator is capable of forming a light pillar when illuminated with light having an axis coaxial with an optical axis of the laser beam;

or the like, or, alternatively,

when the axis of the light guide indicator is parallel to the optical axis of the laser beam, a linear spot can be formed when the light guide indicator emits light.

In some embodiments, in the case that the axis of the light guide indicator is coaxial with the optical axis of the laser beam, the light guide indicator is provided with a through hole coaxial with the axis thereof, and the diameter of the through hole is larger than that of the laser beam;

or the like, or, alternatively,

and under the condition that the axis of the light guide indicator is parallel to the optical axis of the laser beam, the outer side surface of the light guide indicator is attached to the inner surface of the observation area.

In some embodiments, the outer side surface of the light guide indicator is formed with a first light uniformizing layer so that the outer side surface of the light guide indicator can emit light when light is incident on the light guide indicator.

In some embodiments, the first light uniformizing layer is a matte surface formed by performing matte surface treatment on the outer side surface of the light guide indicator;

or the like, or, alternatively,

the first light homogenizing layer is a first light homogenizing structural member covering the outer side face of the light guide indicating piece.

In some embodiments, the outer side surface of the light guide indicator has at least one mark portion protruding outwards, the mark portion extends along the axial direction of the light guide indicator, and light rays entering the light guide indicator can be transmitted to the mark portion, so that the mark portion emits light.

In some embodiments, a second light uniformizing layer is formed on the surface of the identification part, which faces away from the light guide indicator, so that the surface of the identification part, which faces away from the light guide indicator, can emit light in a surface lighting manner under the condition that light is incident on the identification part.

In some embodiments, the second light uniformizing layer is a matte surface formed by performing matte surface treatment on the surface of the identification part, which faces away from the light guide indicator;

or the like, or, alternatively,

the second light equalizing layer is a second light equalizing structural member covering the surface of the identification part deviating from the light guide indicating piece.

In some embodiments, a surface of at least one of the indicia facing away from the light-guiding indicator abuts an inner surface of the viewing area.

In some embodiments, the viewing area is made of a transparent or translucent material.

According to the laser range finder provided by the embodiment of the utility model, the light guide indicating piece can emit light under the condition that light is incident, so that the optical axis of a laser beam emitted by the laser range finding assembly can be identified, and because the laser beam emitting position of the laser range finding assembly and the light guide indicating piece are both positioned in the observation area of the shell, and because the observation area can transmit light, a user can check the optical axis of the laser beam identified by the light emitted by the light guide indicating piece through the observation area, and further determine the position and the direction of the laser beam, so that the measurement starting point of the laser range finder is confirmed, the measurement starting point error caused by human operation factors is reduced, the accuracy of the measurement result is ensured, and the measurement precision requirement of people is met.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of a laser rangefinder according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of the enclosure of FIG. 1 after blanking the viewing area;

FIG. 3 is a schematic diagram of a laser range finder according to an embodiment of the present invention after blanking the housing;

FIG. 4 is a schematic view of a combined structure of a light guide indicator and a mark according to an embodiment of the present invention;

FIG. 5 is a second schematic view of a combined structure of a light guide indicator and a mark according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a combined structure of a light guide indicator and a logo portion according to an embodiment of the present invention;

FIG. 7 is a light effect diagram of a laser range finder according to an embodiment of the present invention in a use state;

fig. 8 is a schematic sectional view of a laser range finder according to an embodiment of the present invention.

Icon: 1000-laser rangefinder; 10-a housing; 101-observation area; 103-laser exit holes; 105-a laser entrance aperture; 20-a light-guide indicator; 201-an identification part; 203-a via hole; 30-a laser emitter; 40-a laser receiver; 50-a circuit board; 60-a display; 70-a power supply; 80-keys.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1 to 3, an embodiment of the utility model provides a laser range finder 1000, where the laser range finder 1000 includes a housing 10, a laser range finder assembly, and a light guide indicator 20. The housing 10 has a viewing area 101 through which light can pass. The laser ranging assembly is disposed in the housing 10, and an optical axis of the laser beam passes through the observation area 101. The light guide indicator 20 is disposed in the observation area 101, and an axis of the light guide indicator 20 extends along an optical axis of the laser beam, wherein the light guide indicator 20 can emit light when light is incident to identify the optical axis of the laser beam.

Therefore, because the light guide indicator 20 can emit light when light enters, the optical axis of the laser beam emitted by the laser ranging assembly can be identified, and because the laser beam emitting position of the laser ranging assembly and the light guide indicator 20 are both located in the observation area 101 of the housing 10, because the observation area 101 can transmit light, a user can check the optical axis of the laser beam identified after the light guide indicator 20 emits light through the observation area 101, and then determine the position and the direction of the laser beam, so as to confirm the measurement starting point of the instrument, reduce the measurement starting point error caused by human operation factors, ensure the accuracy of the measurement result, and meet the measurement accuracy requirement of people.

The housing 10 mainly serves to protect and house components such as the laser distance measuring unit and the light guide indicator 20, and is substantially rectangular. The viewing area 101 is made of a transparent or translucent material to ensure that the light-guiding indicator 20, when illuminated, is able to pass through the viewing area 101 for viewing by a person. Of course, it is understood that the material of the region of the casing 10 other than the observation region 101 is not specifically limited in this embodiment, and may be a transparent material, an opaque material, or a translucent material. Wherein, one end face of the housing 10 is provided with a laser exit hole 103 and a laser entrance hole 105. Wherein, when the whole translucent material of shell 10 made, the observation area 101 also made for translucent material promptly, if leaded light indicator 20 does not give out light, therefore shell 10 can hide inside components and parts, if leaded light indicator 20 is luminous, also only can see the effect when leaded light indicator 20 is luminous through observation area 101 to make laser range finder whole have more succinct outward appearance effect.

It should be noted that, when the light guide indicator 20 emits light to mark the position of the optical axis of the laser beam, the intersection point of the laser beam axis and any one of the two end surfaces in the longitudinal direction of the housing is the measurement starting point of the laser distance meter 1000.

The laser ranging assembly includes a laser emitting element, a laser receiving element and a display 60, the laser emitting element and the laser receiving element are arranged in the width direction of the housing 10, and the display 60 is located on the surface of the housing 10. The laser emitting component is used for emitting laser beams. The laser receiving piece is used for receiving reflected light reflected by the target to be detected after the laser beam irradiates the target to be detected, and calculating the distance between the target to be detected and the laser emitting piece. The display 60 is used for converting the distance between the target to be measured and the laser emitting member into a visible image, so that people can directly read the distance between the laser emitting member and the target to be measured through the visible image displayed by the display 60.

Wherein, laser range finder 1000 still includes circuit board 50, and this circuit board 50 is located shell 10, and circuit board 50 all is connected with laser emitting element, laser receiving element and display 60 electricity. The laser emitting member may be a laser emitter 30, the laser emitter 30 corresponds to the laser emitting hole 103 in the length direction of the housing 10 and is disposed near the other end surface of the housing 10, an optical axis of a laser beam emitted by the laser emitter 30 generally follows the length direction of the housing 10, the laser beam can be irradiated to the target to be measured from the laser emitting hole 103, and the laser beam is reflected by the target to be measured after being irradiated to the target to be measured to form a reflected light, and the reflected light can enter the housing 10 from the laser incident hole 105.

The laser receiver comprises an electrically connected laser receiver 40 and a ranging analysis module, the laser receiver 40 is close to and corresponds to the laser incident hole 105, can receive reflected light reflected by a target to be measured after laser beams irradiate the target to be measured, and converts optical signals into electric signals to be sent to the ranging analysis module through photoelectric conversion.

The ranging analysis module is integrated on the circuit board 50, and can calculate the distance between the target to be measured and the laser emitting member according to the electrical signal transmitted from the laser receiver 40, and transmit the distance to the display 60 to output a display result in a digital visual image.

Optionally, the laser distance measuring instrument 1000 further includes a key 80 and a power supply 70, the power supply 70 is configured to supply power to the laser distance measuring assembly and the circuit board 50, the key 80 is disposed on the housing 10 and electrically connected to the circuit board 50, and the key 80 is configured to control the start and stop of the laser distance measuring assembly.

Optionally, the laser distance meter 1000 further includes a wireless data transmission module, and the wireless data transmission module is electrically connected to the circuit board 50 and is used for transmitting the measurement result to remotely control the distance meter.

Referring to fig. 2 to 6, in the present embodiment, the light guide indicator 20 is cylindrical, and an axis of the light guide indicator 20 is coaxial with an optical axis of the laser beam, so that one end of the light guide indicator 20 corresponds to the laser emitter 30, and the other end corresponds to the laser emitting hole 103, so that when the light guide indicator 20 emits light, a light column can be generated, which is coaxial with the optical axis of the laser beam, and further, the position and the direction of the optical axis of the laser beam relative to the housing 10 can be more accurately displayed.

In order to enable the light guide indicator 20 to emit light when the laser emitter 30 emits the laser beam, the laser emitter 30 and the light guide indicator 20 are coupled, so that scattered light emitted by the laser emitter 30 enters the light guide indicator 20 from one end of the light guide indicator 20, and the light guide indicator 20 emits light.

Of course, in other embodiments, a separate light source may be provided to emit light into the light guide indicator 20 to illuminate the light guide indicator 20 to identify the optical axis of the laser beam.

In addition, in other embodiments, the axis of the light guide indicator 20 may be parallel to the optical axis of the laser beam, i.e., the axis of the light guide indicator 20 is at a certain vertical distance from the axis of the laser beam, the optical axis of the laser beam can be identified when the light guide indicator 20 emits light, and further determining the measurement starting point, for example, one or more light guide indicators 20 may be fixed to the inner surface of the housing 10 (observation region 101) by means of bonding or the like, in which case the light guide indicators 20 may be in the form of a strip or a bar, the outer side of the light-guiding indicator 20 abuts the inner surface of the housing 10 (viewing area 101), so that when the light-guiding indicator 20 is illuminated, one or more light beams (also called linear light spots) with smaller diameters can be observed through the observation area 101, and the optical axis of the laser beam is marked to determine the position of the measurement starting point. The light guide indicator 20 may emit light by scattered light emitted from the laser emitter 30, or may emit light by being illuminated by a separate light source. When the number of the light guide indicators 20 is two or more, the light guide indicators 20 are circumferentially spaced around the optical axis of the laser beam.

That is, in the present application, as long as the axis of the light guide indicator 20 extends along the optical axis of the laser beam, that is, the axis of the light guide indicator 20 is parallel to or coaxial with the optical axis of the laser beam, the optical axis of the laser beam can be identified, and the measurement starting point is determined by the intersection point of the optical axis of the laser beam and either one of the two end surfaces in the longitudinal direction of the housing 10.

In the present embodiment, the light guide indicator 20 is provided with a through hole 203 coaxial with its own axis, and the diameter of the through hole 203 is larger than that of the laser beam. Therefore, the laser beam emitted by the laser emitting piece can directly irradiate the target to be measured after passing through the through hole 203 and the laser emergent hole 103 of the light guide indicating piece 20, so that the divergence effect of the collimated laser beam caused by the light guide indicating piece 20 is avoided, the phenomenon of influencing the measuring result is avoided, and the effect of further improving the measuring accuracy is achieved.

In addition, the color of the light-guiding indicator 20 when it emits light may be changed by changing the color of the light-guiding indicator 20, and of course, the color of the light emitted by the light-guiding indicator 20 may also be changed by changing the color of the light source illuminating the light-guiding indicator 20, i.e., in an embodiment where the light-guiding indicator 20 is caused by scattered light from the laser emitter 30, the color of the light emitted by the laser emitter 30 may be changed by changing the model of the laser emitter 30; in the embodiment in which the light guide indicator 20 is illuminated by a separately provided light source, the light emission color of the light source is directly changed to change the color of the light beam that can be seen through the observation region 101, so that the light beam generated when the light guide indicator 20 is illuminated is significantly different from the observation region 101, and the position of the starting point of the laser beam is more easily confirmed.

Of course, in other embodiments, the light guide indicator 20 may not be provided with the through hole 203, and the laser beam directly passes through the light guide indicator 20 and then exits from the laser exit hole 103, wherein the light guide indicator 20 is made of the same material as the existing light guide column, so as to improve the central light intensity of the laser beam, focus the light more, and make the light guide indicator 20 more beautiful when emitting light.

In this embodiment, the light guide indicator 20 is made of a transparent material, and a first light uniformizing layer is formed on the outer side surface of the light guide indicator 20, so that when light is incident on the light guide indicator 20, the outer side surface of the light guide indicator 20 can generate a surface light emitting effect, and then a light pillar can be observed through the observation area 101. For example, the outer side surface of the light guide indicator 20 may be polished to form a matte surface, so that a surface light emitting effect is formed on the outer side surface of the light guide indicator 20 when the light guide indicator 20 emits light, that is, the first light uniformizing layer is the matte surface formed by polishing the outer side surface of the light guide indicator 20 to form the matte surface, so that the light guide indicator 20 is more easily viewed from the observation area 101, and the position and direction of the optical axis of the laser beam are clarified. It should be noted that a matte polishing effect of a pattern such as an arrow form or a point cloud may be formed on the outer side surface of the light guide indicator 20, so that the optical axis of the laser beam is marked, and the laser range finder 1000 is more beautiful and interesting to use. Of course, the first light equalizing structure may be directly covered on the outer side surface of the light guide indicator 20, that is, the first light equalizing layer is the first light equalizing structure covered on the outer side surface of the light guide indicator 20, so as to form a surface light emitting effect, and further, a more obvious light pillar can be observed from the observation area 101. The first light-homogenizing structural member can be any member capable of realizing surface light emission, such as a light-homogenizing film and a light-homogenizing plate.

Of course, it is understood that the technical means for generating the light column when the light guide indicator 20 emits light is not limited to the above description, and for example, the light guide indicator 20 itself may have scattering impurities, and when light enters the light guide indicator 20, the scattering impurities may generate a scattering effect on the light, and the light guide indicator 20 may emit light to generate the light column.

Optionally, in this embodiment, the outer side surface of the light guide indicator 20 has at least one mark portion 201 protruding outward along the radial direction thereof, the mark portion 201 is made of a transparent material, the mark portion 201 extends along the axial direction of the light guide indicator 20, and light entering the light guide indicator 20 can be transmitted to the mark portion 201, so that the mark portion 201 emits light. Therefore, because the volume of the mark part 201 is smaller, a linear light spot is formed on the surface of the mark part 201 away from the light guide indicator 20, and the linear light spot is parallel to the optical axis of the laser beam, so that at least one linear light spot can be seen while the light column generated by the light emission of the light guide indicator 20 can be seen through the observation area, people can more conveniently confirm the position and the direction of the laser beam through the observation area 101, and the measurement starting point is better confirmed.

The surface of the identification portion 201 departing from the light guide indicator 20 is formed with a second light uniformizing layer, and the arrangement of the second light uniformizing layer can enable the identification portion 201 to generate a surface light emitting effect under the condition that light is incident, so as to form an obvious linear light spot. For example, the surface of the mark portion 201 facing away from the light guide indicator 20 may be polished to form a matte surface, that is, the second light equalizing layer is the matte surface formed by polishing the surface of the mark portion facing away from the light guide indicator 20, so as to achieve the purpose of surface luminescence, and to enable a clear linear light spot to be observed through the observation region 101. The surface of the mark 201 away from the light guide indicator 20 may also be subjected to a multi-point matte polishing process, so that the laser distance measuring instrument 1000 is more attractive and interesting. For another example, a second light equalizing structure may be covered on the surface of the identification portion 201 away from the light guide indicator 20, that is, the second light equalizing layer is the second light equalizing structure covered on the surface of the identification portion 201 away from the light guide indicator 20, so that a surface light emitting effect can also be achieved. The second light-homogenizing structure can be any member capable of realizing a surface light-emitting effect, such as a light-homogenizing film and a light-homogenizing plate.

Of course, it is understood that in some embodiments, the linear light emitting effect when the marker portion 201 emits light may be achieved by technical means not limited to the above description, for example, the marker portion 201 itself may have scattering impurities, and when light enters the marker portion 201, the scattering impurities may generate a scattering effect on the light, and the marker portion 201 may emit light to generate a linear spot.

The number of the markers 201 is not limited in this embodiment, as long as people can confirm the position and direction of the optical axis of the laser beam according to the linear spot displayed by the markers 201. When the number of the mark portions 201 is two or more, the mark portions 201 are arranged at intervals around the circumferential direction of the light guide indicator 20, so that the combined display effect of a plurality of linear light spots and light columns can be observed through the observation region 101, and the optical axis of the laser beam can be more accurately identified.

For example, referring to fig. 7, in the present embodiment, the three markers 201 correspond to three side surfaces of the housing 10 (observation region 101), so that when the markers 201 and the light guide bar emit light, the three side surfaces of the housing 10 (observation region 101) can be seen to display a light beam and a linear light spot, respectively, wherein the linear light spot is located at a substantially central position of the light beam.

In order to ensure that the linear flare generated when the marker 201 emits light can be more easily observed through the observation region 101, the surface of at least one marker 201 facing away from the light guide indicator 20 is abutted against the inner surface of the observation region 101. For example, referring to fig. 8, in the present embodiment, there are three markers 201, and the three markers 201 respectively abut against the inner surface of the observation region 101.

In addition, in order to confirm the measurement start point more accurately, in the present embodiment, the axial length of the marker 201 is set to be equal to the axial length of the light guide indicator 20.

To sum up, in the laser distance measuring instrument 1000 according to the embodiment of the present invention, since the light guide indicator 20 can emit light when light is incident, the optical axis of the laser beam emitted by the laser distance measuring assembly can be identified, and since the laser beam emitting position of the laser distance measuring assembly and the light guide indicator 20 are both located in the observation region 101 of the housing 10, and since the observation region 101 can transmit light, a user can view the optical axis of the laser beam identified after the light guide indicator 20 emits light through the observation region 101, and further determine the position and the direction of the laser beam, so as to confirm the measurement starting point of the instrument, reduce the measurement starting point error caused by human operation factors, thereby ensuring the accuracy of the measurement result, and meeting the measurement accuracy requirement of people.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A laser rangefinder, comprising:

a housing having a viewing area through which light can pass;

the laser ranging assembly is arranged in the shell and can emit laser beams, and the optical axes of the laser beams pass through the observation area;

leaded light indicator, set up in observation area, just the axis of leaded light indicator is followed laser beam's optical axis extends, wherein, leaded light indicator can give out light under the condition that there is the light to penetrate, with the sign laser beam's optical axis.

2. The laser range finder of claim 1, wherein in a case where an axis of the light guide indicator is coaxial with an optical axis of the laser beam, the light guide indicator is capable of forming a light column when it emits light;

or the like, or, alternatively,

when the axis of the light guide indicator is parallel to the optical axis of the laser beam, a linear spot can be formed when the light guide indicator emits light.

3. The laser range finder of claim 1, wherein in a case where an axis of the light guide indicator is coaxial with an optical axis of the laser beam, the light guide indicator is provided with a through hole coaxial with its own axis, and a diameter of the through hole is larger than a diameter of the laser beam;

or the like, or, alternatively,

and under the condition that the axis of the light guide indicator is parallel to the optical axis of the laser beam, the outer side surface of the light guide indicator is attached to the inner surface of the observation area.

4. The laser range finder of claim 1, wherein a first light uniformizing layer is formed on an outer side surface of the light guide indicator so that the outer side surface of the light guide indicator can emit light when light is incident thereon.

5. The laser range finder of claim 4, wherein the first light uniformizing layer is a matte surface formed by matte surface treatment of an outer side surface of the light guide indicator;

or the like, or, alternatively,

the first light homogenizing layer is a first light homogenizing structural member covering the outer side face of the light guide indicating piece.

6. The laser range finder of claim 1, wherein the outer side surface of the light guide indicator has at least one mark portion protruding outward, the mark portion extends along the axial direction of the light guide indicator, and light rays incident into the light guide indicator can be transmitted to the mark portion, so that the mark portion emits light.

7. The laser distance meter according to claim 6, wherein a second light uniformizing layer is formed on the surface of the identification part facing away from the light guide indicator, so that the surface of the identification part facing away from the light guide indicator can emit light when light is incident on the identification part.

8. The laser range finder of claim 7, wherein the second light uniformizing layer is a matte surface formed by matte surface treatment of a surface of the identification part facing away from the light guide indicator;

or the like, or, alternatively,

the second light equalizing layer is a second light equalizing structural member covering the surface of the identification part deviating from the light guide indicating piece.

9. The laser range finder of claim 6, wherein a surface of at least one of the indicia facing away from the light-guiding indicator abuts an inner surface of the viewing area.

10. The laser range finder of claim 1, wherein the viewing area is made of a transparent or translucent material.

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