Range finder with photographing function

Abstract

A range finder with a photographing function disclosed by the present invention comprises a telescopic optical system and a laser ranging system, the telescopic optical system comprises an objective lens group, an image plane synchronizing mirror, a prism group, an LCD display, an eyepiece group, a camera lens assembly and a camera Sensor, and the objective lens group, the image plane synchronizing mirror, the prism group, the camera lens assembly and the camera Sensor form a photographing optical system. The image plane synchronous mirror is driven by a top speed synchronous driving mechanism, the laser ranging system synchronously transmits measured scenery distance data to the single chip microcomputer MCU for processing, and the single chip microcomputer MCU converts the scenery distance data into position data of the image plane synchronous mirror and outputs a signal. The stepping motor is driven to quickly move the image plane synchronous mirror to a preset position, so that sceneries are synchronously and clearly imaged on the image plane of the LCD and the camera Sensor, the functions are more perfect, the manufacturing cost is greatly reduced, and the function cost performance is higher.

Description

Technical Field

[0001] The present invention belongs to a rangefinder with a photographic function. Background Art

[0002] Generally, a laser rangefinder includes a telescopic optical system and a laser ranging system. The telescopic optical system includes an objective lens group, an erecting prism group, an LCD display, and an eyepiece group arranged in sequence along the optical axis from the scene side to the eye side. The objective lens group, the erecting prism group, the LCD display, and the eyepiece group are installed in a housing. The eyepiece group is manually adjusted to move left and right along the optical axis L to adjust the distance between the eyepiece group and the LCD display, so that people with different visual acuities can clearly view the data displayed on the LCD display. The laser ranging system sends the measured distance data of the scene to the LCD display for display. For the specific structure, refer to the utility model patent with the patent number CN201721525575 and the name: A ranging telescopic system composed of plastic aspherical lenses. The applicant filed a utility model patent application on April 15, 2024, with the patent number: CN202420780505 and the patent name: A single-tube telescopic laser rangefinder with a new focusing function. This patent adds an internal focusing lens between the objective lens group and the beam splitting prism group. The internal focusing lens can move left and right along the optical axis L to image scenes at different distances on the LCD display, and the internal focusing lens is driven by a driving mechanism.

[0003] For the current rangefinders (or telescopic laser rangefinders) on the market, there are still the following disadvantages: 1) The functions are single, without the function of a camera to take photos, and the cost performance is not high; 2) Even if it has a camera to take photos, it just simply stacks the shooting lens in the product. How to combine the optical systems on the existing rangefinder to make the combined structure more simplified, and make the telescopic field of view and the photographing field of view consistent, and synchronously image and synchronously focus is also a technical difficulty that must be considered key. Summary of the Invention

[0004] The purpose of the present invention is to provide a rangefinder with a photographic function, so as to solve the technical problems that the existing rangefinders have single functions, without the function of a camera to take photos, and the cost performance is not high.

[0005] A further purpose of the present invention is to provide a rangefinder with a photographic function. After adding the photographing function, most of the optical elements are shared with the telescopic optical system. The telescopic optical path of the telescopic optical system, the ranging receiving optical path of the laser ranging system, and the photographing optical path of the photographing optical system are coaxial, and the telescopic field of view angle of the telescopic optical system is equal to the field of view angle of the photographing optical system, making the combined structure more simplified, the manufacturing cost lower, and being able to synchronously image on the image plane of the LCD display and the camera Sensor, and the operation is more convenient.

[0006] The technical solution of the present invention is implemented as follows:

[0007] A rangefinder with a photographic function includes a telescopic optical system and a laser rangefinding system. The telescopic optical system includes an objective lens group, an image plane synchronization mirror, a prism group, an LCD display, and an eyepiece group arranged in sequence along the optical axis L from the scene side to the eye side. The eyepiece group is manually adjusted to move left and right along the optical axis L to adjust the distance between the eyepiece group and the LCD display, so that people with different visual acuities can clearly view the data displayed on the LCD display. The laser rangefinding system includes a laser emission module and a laser reception module.

[0008] It is characterized in that: it further includes a camera lens assembly and a camera Sensor. The objective lens group, the image plane synchronization mirror, the prism group, the camera lens assembly, and the camera Sensor form a photographic optical system. The image plane synchronization mirror can move left and right along the optical axis L and is driven by an extremely fast synchronization drive mechanism. The extremely fast synchronization drive mechanism includes a stepping motor, a motor drive circuit, and a single-chip microcomputer MCU. The laser rangefinding system also synchronously transmits the measured scene distance data to the single-chip microcomputer MCU for processing. The single-chip microcomputer MCU sends the scene distance data to the LCD display for display. The single-chip microcomputer MCU converts the scene distance data into the position data of the image plane synchronization mirror and outputs a signal to drive the stepping motor to quickly move the image plane synchronization mirror to a predetermined position, so that the scene is synchronously and clearly imaged on the image plane of the LCD display and on the camera Sensor.

[0009] The telescopic optical path of the above-mentioned telescopic optical system, the ranging and receiving optical path of the laser rangefinding system, and the photographic optical path of the photographic optical system are coaxial, and the telescopic field angle of the telescopic optical system is equal to the field angle of the photographic optical system.

[0010] The above-mentioned prism group includes a first prism, a second prism, a third prism, and a fourth prism from top to bottom. The first prism and the second prism are on the optical axis L to realize the function of inverting the image of the telescopic optical system. The third prism splits one path of light for the laser reception module and another path for the photographic function. The fourth prism leads out one path of light for the photographic function of the camera optical system.

[0011] The above-mentioned objective lens group, image plane synchronization mirror, inverting prism group, LCD display, eyepiece group, camera lens assembly, and camera Sensor are installed inside a lens barrel housing.

[0012] The above-mentioned single-chip microcomputer MCU stores a comparison table of the mutually related scene distance data and the position data of the image plane synchronization mirror. When the laser rangefinding system synchronously transmits the measured scene distance data to the single-chip microcomputer MCU, the single-chip microcomputer MCU uses the table lookup method to obtain the position data of the image plane synchronization mirror.

[0013] The above-mentioned microcontroller unit (MCU) stores a comparison table of interrelated scene distance data and the position data of the image plane synchronous mirror. The comparison table only contains several groups of associated scene distance data and the position data of the image plane synchronous mirror. When the scene distance data measured by the laser ranging system is not among the several groups of associated data in the comparison table, it is converted into the corresponding position data of the image plane synchronous mirror through an interpolation algorithm.

[0014] The above-mentioned comparison table contains the position data of the image plane synchronous mirror obtained at different position points of the scene for several groups of associated scene distance data and the position data of the image plane synchronous mirror. The distance between adjacent two points among these different position points of the scene is uneven. The closer to the objective lens group, the smaller the distance between adjacent two points; the farther away from the objective lens group, the larger the distance between adjacent two points.

[0015] The above-mentioned image plane synchronous mirror is installed on a lens support. Guide grooves are provided on both sides of the lens support, and guide rails are installed in the guide grooves. A slider is installed outside the lens support, and a threaded groove is provided in the middle of the slider. A lead screw is threadedly connected to the threaded groove provided in the middle of the slider. A stepping motor drives the lead screw to rotate, thereby driving the slider and the image plane synchronous mirror to move left and right along the optical axis L.

[0016] A position positioning plate also protrudes outside the above-mentioned lens support. The positioning plate cooperates with a position sensor to obtain the position data of the image plane synchronous mirror. The position sensor sends the position data of the image plane synchronous mirror to the microcontroller unit (MCU). The position sensor is installed on a PCB board.

[0017] The above-mentioned rangefinder with a photographic function further includes a start button. The start button is used to start the laser ranging system to measure the scene distance data, and synchronously transmit the scene distance data to the LCD monitor and the microcontroller unit (MCU), and synchronously drive the stepping motor to move the image plane synchronous mirror to a predetermined position to achieve synchronous imaging on the image plane of the camera Sensor.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] Effect 1: On the basis of the original laser rangefinder, the present invention adds a camera lens assembly and a camera Sensor. The objective lens group, image plane synchronization mirror, prism group, camera lens assembly and camera Sensor form a camera optical system. The laser ranging system also synchronously transmits the measured scene distance data to the single-chip microcomputer MCU for processing. The single-chip microcomputer MCU sends the scene distance data to the LCD display for display. The single-chip microcomputer MCU converts the scene distance data into the position data of the image plane synchronization mirror and outputs a signal to drive the stepping motor to quickly move the image plane synchronization mirror to the predetermined position, so that the scene is synchronously and clearly imaged on the image plane of the LCD display and the camera Sensor. It can simply realize the photographic function, making the functions of the rangefinder more perfect. Moreover, many optical components of the camera optical system are shared with the telescopic optical system, greatly reducing the manufacturing cost, greatly simplifying the structure, and having a higher functional cost performance.

[0020] Other advantages of the present invention will be described in detail in the embodiment part. Brief Description of the Drawings

[0021] Figure 1 is the optical path diagram of the present invention;

[0022] Figure 2 is the schematic diagram of the principle of the local ranging telescopic optical system of the present invention;

[0023] Figure 3 is Figure 2 the A-A cross-sectional view of

[0024] Figure 4 is Figure 3 the B-B cross-sectional view of

[0025] Figure 5 is the circuit block diagram of the present invention;

[0026] Figure 6 is the execution flow chart of the ranging telescopic optical system of the present invention;

[0027] Figure 7 is the plotting schematic diagram of the scene distance data and the position data of the image plane synchronization mirror;

[0028] Figure 8 is the schematic diagram of the principle of the local camera optical system of the present invention;

[0029] Figure 9 is the three-dimensional diagram of the present invention;

[0030] Figure 10 is the structural cross-sectional view of the present invention. Detailed Description of the Invention

[0031] To make the objectives, 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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1:

[0033] As Figure 1 shown, this embodiment provides a rangefinder with a photographic function, which includes a telescopic optical system and a laser ranging system. The telescopic optical system includes an objective lens group 1, an image plane synchronization mirror 2, a prism group 3, an LCD display 4, and an eyepiece group 5 arranged in sequence along the optical axis L from the scene side to the eye side. The eyepiece group 5 is manually adjusted to move left and right along the optical axis L to adjust the distance between the eyepiece group 5 and the LCD display 4, so that people with different visual acuities can clearly view the data displayed on the LCD display 4. The laser ranging system includes a laser emission module and a laser reception module.

[0034] It is characterized in that: it further includes a camera lens assembly 8 and a camera Sensor 9. The objective lens group 1, the image plane synchronization mirror 2, the prism group 3, the camera lens assembly 8, and the camera Sensor 9 form a photographing optical system. The image plane synchronization mirror 2 can move left and right along the optical axis L and is driven by an ultra-fast synchronization drive mechanism. The ultra-fast synchronization drive mechanism includes a stepping motor 25, a motor drive circuit, and a single-chip microcomputer MCU. The laser ranging system also synchronously transmits the measured scene distance data to the single-chip microcomputer MCU for processing. The single-chip microcomputer MCU sends the scene distance data to the LCD display 4 for display, and the single-chip microcomputer MCU converts the scene distance data into the position data of the image plane synchronization mirror 2 and outputs a signal to drive the stepping motor 25 to quickly move the image plane synchronization mirror 2 to a predetermined position, so that the scene is synchronously imaged on the image plane of the LCD display 4 and the camera Sensor 9.

[0035] The present invention adds a camera lens assembly 8 and a camera Sensor 9 on the basis of the original structure of the laser rangefinder. The objective lens group 1, the image plane synchronization mirror 2, the prism group 3, the camera lens assembly 8, and the camera Sensor 9 form a camera optical system. It can simply achieve the photographic function, making the function of the rangefinder more perfect. Moreover, many optical components of the camera optical system are shared with the telescopic optical system, greatly reducing the manufacturing cost, significantly simplifying the structure, and having a higher functional cost performance.

[0036] The telescopic optical path of the above telescopic optical system, the ranging receiving optical path of the laser ranging system, and the photographing optical path of the photographing optical system are coaxial, and the telescopic field angle of the telescopic optical system is made equal to the field angle of the photographing optical system.

[0037] The above prism group 3 includes a first prism 31, a second prism 32, a third prism 33, and a fourth prism 34 from top to bottom. The first prism 31 and the second prism 32 are on the optical axis L to achieve the function of inverting the telescopic optical system. The third prism 33 splits one path of light for the laser receiving module and another path for the photographing function. The fourth prism 34 leads out one path of light for the photographing function of the camera optical system, with a simple and compact structure.

[0038] As Figures 2 to 10 shown, it is the principle of the ranging telescopic optical system of the present invention. The telescopic optical system includes an objective lens group 1, an image plane synchronization mirror 2, an inverting prism group 3, an LCD display 4, and an eyepiece group 5 arranged in sequence along the optical axis L from the scene side to the eye side. The objective lens group 1, the image plane synchronization mirror 2, the inverting prism group 3, the LCD display 4, and the eyepiece group 5 are installed inside a lens barrel housing 10. The eyepiece group 5 is manually adjusted to move left and right along the optical axis L to adjust the distance between the eyepiece group 5 and the LCD display 4, so that people with different visual acuities can clearly view the data displayed on the LCD display 4. An image plane synchronization mirror 2 is added between the objective lens group 1 and the inverting prism group 3. The image plane synchronization mirror 2 can move left and right along the optical axis L to image scenes at different distances on the image plane of the LCD display 4. The laser ranging system sends the measured scene distance data (i.e., object distance data) to the LCD display 4 for display; the laser ranging system includes a transmitting part and a receiving part. The transmitting part includes a transmitting tube 61 and a transmitting lens 62. The receiving part includes a receiving lens 63 and a receiving sensor 64. It is characterized in that:

[0039] The image plane synchronization mirror is driven by an extremely fast synchronization driving mechanism. The extremely fast synchronization driving mechanism includes a stepper motor 25, a motor driving circuit, and a single-chip microcomputer MCU. The laser ranging system also synchronously transmits the measured scene distance data to the single-chip microcomputer MCU for processing. The single-chip microcomputer MCU uses the scene distance data to convert it into the position data of the image plane synchronization mirror and outputs a signal to drive the stepper motor 25 to quickly move the image plane synchronization mirror 2 to a predetermined position, so that the scene is imaged on the image plane of the LCD display 4 and is synchronously displayed with the scene distance data displayed on the LCD display 4. Moreover, the present invention adds a camera lens assembly 8 and a camera Sensor 9. The objective lens group 1, the image plane synchronization mirror 2, the prism group 3, the camera lens assembly 8, and the camera Sensor 9 form a photographing optical system. When the image plane synchronization mirror 2 moves to a predetermined position, the scene is also imaged on the camera Sensor 9 synchronously. The camera Sensor 9 is the image sensor of the camera.

[0040] The present invention ingeniously utilizes the existing laser ranging system on the original rangefinder. The laser ranging system sends the measured scene distance data (i.e., object distance data) to the LCD display 4 for display, and at the same time, the laser ranging system also synchronously transmits the measured scene distance data to the single-chip microcomputer MCU for processing. The single-chip microcomputer MCU uses the scene distance data to calculate and convert it into the position data of the image plane synchronous mirror and outputs a signal to drive the stepping motor 25 to quickly move the image plane synchronous mirror 2 to the predetermined position, so that the scene is synchronously imaged on the image plane of the LCD display 4 and the camera Sensor9, and is synchronously displayed with the scene distance data displayed on the LCD display 4. It can use the drive stepping motor to quickly move the image plane synchronous mirror to the predetermined position in about 0.2 milliseconds - 1.2 milliseconds, which is fast, accurate, simple and reliable, and does not require manual operation.

[0041] There is a corresponding table of the scene distance data and the position data of the image plane synchronous mirror stored in the above single-chip microcomputer MCU. When the laser ranging system synchronously transmits the measured scene distance data to the single-chip microcomputer MCU, the single-chip microcomputer MCU uses the look-up table method to obtain the position data of the image plane synchronous mirror. The scene distance data and the position data of the image plane synchronous mirror in the corresponding table are in a one-to-one correspondence relationship, as shown in Table 1 specifically: Starting from the object distance of 3 meters in Table 1, for every increase of 0.5 meters, the position data of the corresponding image plane synchronous mirror is measured to form a corresponding table. Without cumbersome calculation and feedback, the single-chip microcomputer MCU can quickly obtain the position data of the image plane synchronous mirror by using the look-up table method, further saving the computing resources of the single-chip microcomputer MCU. A low-grade single-chip microcomputer MCU can be selected to meet the requirements, reducing the manufacturing cost.

[0042]

[0043]

[0044] Due to too much measurement data in Table 1, cumbersome work, and occupying too much storage resources, the single-chip microcomputer MCU may waste too much time looking up the table. To improve this, there is a corresponding table of the scene distance data and the position data of the image plane synchronous mirror stored in the single-chip microcomputer MCU. The corresponding table only contains several groups (10 groups of data in Table 2) of associated scene distance data and the position data of the image plane synchronous mirror. When the measured scene distance data obtained by the laser ranging system is not among the several groups of associated data in the corresponding table, it is converted into the corresponding position data of the image plane synchronous mirror through the interpolation algorithm, as shown in Table 2 specifically.

[0045]

[0046] Plotting the above 10 groups of data in the graph can obtain Figure 7In the graph, the vertical axis is the position data of the image plane synchronous mirror, represented by Y, and the horizontal axis is the scene distance data, represented by X. Assuming that the coordinates of two adjacent points are (X1, Y1) and (X2, Y2), when the scene distance data of a certain point is known to be X0, and X0 is between X1 and X2, the corresponding position data of the image plane synchronous mirror can be obtained by linear interpolation:

[0047] Y0=Y1+[(X0-X1) / (X2-X1)]*(Y2-Y1).

[0048] The above interpolation method can meet the requirement that the number of data in the comparison table of the mutually related scene distance data and the position data of the image plane synchronous mirror will not be too large, saving the amount of stored data, and obtaining the scene distance data and the position data of the image plane synchronous mirror through simple interpolation operations, which is simple and convenient.

[0049] The above comparison table contains several sets of associated scene distance data and image plane synchronous mirror position data, which are obtained at different positions of the scene. The distance between two adjacent points in these different positions of the scene is uneven. The closer to the objective lens group, the smaller the distance between the two adjacent points, and the farther away from the objective lens group, the larger the distance between the two adjacent points. The data sampling points meet Figure 7 The requirement of curve change is to improve the accuracy of interpolation calculation.

[0050] The above-mentioned single-chip microcomputer MCU stores a comparison table of mutually related scene distance data and image plane synchronization mirror position data. This comparison table is obtained when designing the telescopic optical system. That is, through professional optical design software, the corresponding data has been obtained in computer simulation when designing the telescopic optical system.

[0051] The above-mentioned image plane synchronizer mirror 2 is mounted on a lens bracket 21, with guide grooves 211 provided on both sides of the lens bracket 21, and guide rails 22 installed inside the guide grooves 211. A slider 23 is installed on the outside of the lens bracket 21, and a threaded groove is provided in the middle of the slider 23. The screw rod 24 is threadedly connected to the threaded groove provided in the middle of the slider 23. The stepping motor 25 drives the screw rod to rotate, thereby driving the slider 23 and the image plane synchronizer mirror 2 to move left and right along the optical axis L. The structure is simple, the movement stability is good, and the precision is high.

[0052] The outside of the above-mentioned lens bracket 1 also protrudes with a position positioning plate 26. The positioning plate 26 cooperates with the position sensor 71 to obtain the position data of the image plane synchronizer mirror 2. The position sensor 71 sends the position data of the image plane synchronizer mirror 2 to the single-chip microcomputer MCU. The position sensor 71 is installed on a PCB board 72. The positioning plate 26 cooperates with the position sensor 71 to obtain the position data of the image plane synchronizer mirror 2, which can be well fed back to the single-chip microcomputer MCU so that the single-chip microcomputer MCU can grasp the position of the image plane synchronizer mirror 2 at any time.

[0053] The above also includes a start button, which is used to start the laser ranging system to measure the distance data of the scene, and synchronously transmit the distance data of the scene to the LCD display and the single-chip microcomputer MCU.

[0054] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A rangefinder with a photographic function, comprising a telescopic optical system and a laser ranging system. The telescopic optical system includes an objective lens group (1), an image plane synchronization mirror (2), a prism group (3), an LCD display (4), and an eyepiece group (5) arranged in sequence along the optical axis L from the scene side to the eye side. The eyepiece group (5) is manually adjusted to move left and right along the optical axis L to adjust the distance between the eyepiece group (5) and the LCD display (4), so that people with different visual acuities can clearly view the data displayed on the LCD display (4). The laser ranging system includes a laser emission module and a laser receiving module; It is characterized in that: It further includes a camera lens assembly (8) and a camera Sensor (9). The objective lens group (1), the image plane synchronization mirror (2), the prism group (3), the camera lens assembly (8), and the camera Sensor (9) form a photographic optical system. The image plane synchronization mirror (2) can move left and right along the optical axis L and is driven by an extreme speed synchronization drive mechanism. The extreme speed synchronization drive mechanism includes a stepping motor (25), a motor drive circuit, and a single-chip microcomputer MCU. The laser ranging system also synchronously transmits the measured scene distance data to the single-chip microcomputer MCU for processing. The single-chip microcomputer MCU sends the scene distance data to the LCD display (4) for display. The single-chip microcomputer MCU uses the scene distance data to calculate the position data of the image plane synchronization mirror (2) and outputs a signal to drive the stepping motor (25) to quickly move the image plane synchronization mirror (2) to a predetermined position, so that the scene is synchronously imaged on the image plane of the LCD display (4) and the camera Sensor (9).

2. The rangefinder with a photographing function according to claim 1, wherein: The telescopic optical path of the telescopic optical system, the ranging receiving optical path of the laser ranging system, and the photographic optical path of the photographic optical system are coaxial, and the telescopic field of view angle of the telescopic optical system is equal to the field of view angle of the photographic optical system.

3. The rangefinder with a photographic function according to claim 1, characterized in that: The prism group (3) includes a first prism (31), a second prism (32), a third prism (33), and a fourth prism (34) from top to bottom. The first prism (31) and the second prism (32) are on the optical axis L to achieve the function of inverting the image of the telescopic optical system. The third prism (33) splits one path of light for the laser receiving module and another path for the photographic function. The fourth prism (34) leads out one path of light for the photographic function of the camera optical system.

4. A rangefinder with a photographic function according to claim 3, characterized in that: The objective lens group (1), the image plane synchronization mirror (2), the inverting prism group (3), the LCD display (4), the eyepiece group (5), the camera lens assembly (8), and the camera Sensor (9) are installed inside a lens barrel housing (10).

5. A rangefinder with a photographic function according to claim 1 or 2 or 3 or 4, characterized in that: The single-chip microcomputer MCU stores a comparison table of the interrelated scene distance data and the position data of the image plane synchronization mirror. When the laser ranging system synchronously transmits the measured scene distance data to the single-chip microcomputer MCU, the single-chip microcomputer MCU uses the table lookup method to obtain the position data of the image plane synchronization mirror.

6. The rangefinder with a photographing function according to claim 5, wherein: There is a comparison table stored in the single-chip microcomputer MCU, which contains the correlated scene distance data and the position data of the image plane synchronous mirror. The comparison table only includes several groups of correlated scene distance data and the position data of the image plane synchronous mirror. When the scene distance data measured by the laser ranging system is not among the several groups of correlated data in the comparison table, it is converted into the corresponding position data of the image plane synchronous mirror through an interpolation algorithm.

7. The rangefinder with a photographing function according to claim 6, characterized in that: The comparison table contains several groups of correlated scene distance data and the position data of the image plane synchronous mirror, which are the position data of the image plane synchronous mirror obtained at different position points of the scene. The distance between adjacent two points among these different position points of the scene is uneven. The closer to the objective lens group, the smaller the distance between adjacent two points; the farther from the objective lens group, the larger the distance between adjacent two points.

8. A rangefinder with a photographic function according to claim 4, characterized in that: The image plane synchronous mirror (2) is installed on a lens bracket (21). Guide grooves (211) are provided on both sides of the lens bracket (21). A guide rail (22) is installed in the guide grooves (211). A slider (23) is installed outside the lens bracket (21). A threaded groove is provided in the middle of the slider (23). A lead screw (24) is threadedly connected to the threaded groove provided in the middle of the slider (23). A stepping motor (25) drives the lead screw (24) to rotate, thereby driving the slider (23) and the image plane synchronous mirror (2) to move left and right along the optical axis L.

9. The rangefinder with a photographic function according to claim 8, characterized in that: A position positioning plate (26) also protrudes outside the lens bracket (21). The positioning plate (26) cooperates with a position sensor (71) to obtain the position data of the image plane synchronous mirror (2). The position sensor (71) sends the position data of the image plane synchronous mirror (2) to the single-chip microcomputer MCU. The position sensor (71) is installed on a PCB board (72).

10. The rangefinder with a photographing function according to claim 9, wherein: It also includes a start button, which is used to start the laser ranging system to measure the scene distance data and synchronously transmit the scene distance data to the LCD monitor and the single-chip microcomputer MCU.

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