Monocular telescopic laser range finder with novel focusing function

Abstract

The utility model discloses a monocular telescopic laser range finder with a novel focusing function, which comprises a telescopic optical system, and the telescopic optical system comprises an objective lens group, an inner focusing lens, a beam splitter prism group, an LCD (Liquid Crystal Display) and an eyepiece group which are sequentially arranged along an optical axis L from a scene side to an eye side, the objective lens group, the inner focusing lens, the beam splitter prism group, the LCD and the eyepiece group are installed in a shell, the eyepiece group can move left and right along an optical axis L so as to adjust the distance between the eyepiece group and the LCD, people with different eyesight can clearly watch images displayed on the LCD, the inner focusing lens is additionally arranged between the objective lens group and the beam splitter prism group, and the lens group can be used for adjusting the distance between the eyepiece group and the LCD. The inner focusing lens can move left and right along the optical axis L so that sceneries at different distances can be imaged on the LCD, the inner focusing lens is driven by the driving mechanism, two functions of adjusting the distance between the eyepiece group and the LCD and focusing and imaging the sceneries at different distances on the LCD are realized by adopting two sets of independent mechanisms, the two functions do not interfere with each other, and the implementation is easy.

Description

Technical Field

[0001] The invention belongs to a monocular telescopic laser rangefinder with a novel focusing function. Background Art

[0002] The specific structure of the existing monocular telescopic laser rangefinder, telescopic optical system and laser transmitting and receiving system on the market can be referred to the application filed by the applicant on November 15, 2017, which is titled: a ranging telescopic module with OLED and LCD dual display functions.

[0003] like Figure 1 The monocular telescopic laser rangefinder shown in the figure comprises an objective lens group, a dichroic prism group, an LCD display and an eyepiece group which are arranged in sequence along the optical axis from the scene side to the eye side. The objective lens group, the dichroic prism group, the LCD display and the eyepiece group are installed in a housing. The objective lens group, the dichroic prism group and the LCD display are fixedly installed in the housing. The eyepiece group can move left and right along the optical axis L. It has two functions: 1) to enable people with different vision to clearly view the image displayed on the LCD display; 2) to enable scenes at different distances from the outside to be clearly imaged on the imaging surface of the LCD display.

[0004] The above structure has the following technical problems: 1) Since the objective lens group, the dichroic prism group and the LCD display are all fixed and cannot be moved, it is impossible for all the scenes at different distances to be clearly imaged on the imaging surface of the LCD display. Therefore, simply adjusting the distance between the objective lens group and the LCD display cannot take into account both the two functions of enabling people with different vision to clearly view the image displayed on the LCD display and enabling scenes at different distances to be clearly imaged on the imaging surface of the LCD display. Summary of the invention

[0005] The purpose of the present invention is to provide a monocular telescopic laser rangefinder with a novel focusing function, so as to solve the technical problem that the monocular telescopic laser rangefinder in the prior art can only adjust the distance between the eyepiece group and the LCD display and cannot take into account the two functions of enabling people with different vision to clearly view the image displayed on the LCD display and enabling the external scenes at different distances to be clearly imaged on the imaging surface of the LCD display.

[0006] The technical solution of the present invention is achieved in this way:

[0007] A monocular telescopic laser rangefinder with a novel focusing function comprises a telescopic optical system and a laser transmitting and receiving system, wherein the telescopic optical system comprises an objective lens group, an inner focusing lens, a beam splitter prism group, an LCD display and an eyepiece group which are arranged in sequence along an optical axis L from the scene side to the eye side, the objective lens group, the inner focusing lens, the beam splitter prism group, the LCD display and the eyepiece group are installed in a shell, the eyepiece group can be moved 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 vision can clearly view the image displayed on the LCD display, and the characteristic is that an inner focusing lens is added between the objective lens group and the beam splitter prism group, the inner focusing lens can be moved left and right along the optical axis L so that scenes at different distances are imaged on the LCD display, and the inner focusing lens is driven by a driving mechanism.

[0008] The above-mentioned driving mechanism includes a focusing wheel, a push rod and a spring. The push rod is axially installed. A boss that gradually protrudes axially is provided on the end face of the focusing wheel. One end of the push rod is pressed against the boss. The spring is sleeved on the push rod. There is a step in the middle of the push rod. One end of the spring is pressed against the step, and the other end of the spring is pressed against the baffle. Under the action of the spring, one end of the push rod is always pressed against the boss. A lever is extended from the other end of the push rod, and the lever is used to drive the inner focusing mirror to move left and right along the optical axis L.

[0009] The focus wheel is arranged at one end of the housing.

[0010] The driving mechanism comprises a sliding push-pull rod, an axial strip groove is arranged on the shell, the middle part of the sliding push-pull rod passes through the axial strip groove and can slide back and forth along the axial strip groove, the tail end of the sliding push-pull rod is connected to the inner focusing lens, and the top end of the sliding push-pull rod is exposed outside the shell.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] Effect 1: By adjusting the distance between the eyepiece group and the LCD display, people with different vision can clearly see the image displayed on the LCD display. The inner focusing lens is driven by a driving mechanism. The inner focusing lens can move left and right along the optical axis L to image the scenes at different distances on the LCD display. Two sets of independent mechanisms are used to achieve two functions without interfering with each other, and the implementation is easy.

[0013] Effect 2: The inner focusing mirror is also in the laser optical path of the laser transmitting and receiving system (it is an overall concept, which has been defined in the text above. It is not recommended to add the words "or" or "or", otherwise it will be inconsistent). The inner focusing mirror is beneficial to the focusing and energy collection of the laser optical path. While the inner focusing mirror focuses on the image of the scene, it also focuses and collects the laser reflected energy on the scenes at different distances, because the imaging surface on the LCD display is synchronously associated with the light receiving surface of the APD (laser receiving sensor) during the optical design. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The optical principle diagram of the monocular telescopic laser rangefinder currently on the market;

[0015] Figure 2 This is an optical principle diagram of the first embodiment of the utility model;

[0016] Figure 3 for Figure 2 Schematic diagram of the driving mechanism after it is unfolded;

[0017] Figure 4 A three-dimensional diagram of an embodiment of the present invention from one angle;

[0018] Figure 5 A three-dimensional diagram of another angle of the first embodiment of the present utility model;

[0019] Figure 6 A structural cross-sectional view of a section of the first embodiment of the utility model;

[0020] Figure 7 It is a structural cross-sectional view of another cross section of the first embodiment of the utility model;

[0021] Figure 8 This is a schematic diagram of the principle of the second embodiment of the present utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1:

[0024] like Figures 2 to 7As shown, this embodiment provides a monocular telescopic laser rangefinder with a novel focusing function, including a telescopic optical system and a laser transmitting and receiving system, wherein the telescopic optical system includes an objective lens group 5, an inner focusing lens 6, a dichroic prism group 7, an LCD display 8 and an eyepiece group 9 arranged in sequence along an optical axis L from the scene side to the eye side, the objective lens group 5, the inner focusing lens 6, the dichroic prism group 7, the LCD display 8 and the eyepiece group 9 are installed in a housing 100, the eyepiece group 9 can be moved left and right along the optical axis L to adjust the distance between the eyepiece group 9 and the LCD display 8, so that people with different vision can clearly view the image displayed on the LCD display 8, characterized in that: an inner focusing lens 6 is added between the objective lens group 5 and the dichroic prism group 7, the inner focusing lens 6 can be moved left and right along the optical axis L so that scenes at different distances are imaged on the LCD display 8, the inner focusing lens 6 is driven by a driving mechanism, and the adjustment of the eyepiece group 9 is completed by a diopter adjustment wheel 17 and corresponding components, which are prior arts and will not be described in detail here.

[0025] The driving mechanism includes a focusing wheel 10, a push rod 12 and a spring 13. The push rod 12 is axially installed (i.e., installed parallel to the optical axis L). A boss 11 that gradually protrudes axially is provided on the end surface of the focusing wheel 10. One end of the push rod 12 is pressed against the boss 11. The spring 13 is sleeved on the push rod 12. A step 14 is provided in the middle of the push rod 12. One end of the spring 13 is pressed against the step 14. The other end of the spring 13 is pressed against the baffle 15. Under the action of the spring 13, one end of the push rod 12 is always pressed against the boss 11. A lever 16 is extended from the other end of the push rod 12. The lever 16 is used to drive the inner focusing lens 6 to move left and right along the optical axis L. The inner focusing lens 6 is installed in a lens barrel, and the baffle 15 is arranged in the housing 100.

[0026] The focus wheel 10 is disposed at one end of the housing.

[0027] The laser transmitting and receiving system includes a laser transmitter 1, a transmitting lens 2, a receiving lens 3 and a receiving sensor 4.

[0028] The working principle of the utility model is: rotating the focus wheel 10 causes one end of the push rod 12 to be pushed by the axially gradually protruding boss 11 to move axially, and the push rod 12 drives the inner focusing lens 6 to move left and right along the optical axis L. The utility model uses the diopter adjustment wheel 17 and corresponding components to adjust the distance between the eyepiece group and the LCD display, so that people with different vision can clearly see the image displayed on the LCD display. The inner focusing lens 6 is driven by a driving mechanism, and the inner focusing lens 6 can move left and right along the optical axis L to image the scenes at different distances on the LCD display. Two sets of independent mechanisms are used to realize two functions, which do not interfere with each other and are easy to implement.

[0029] In addition, the internal focusing mirror 6 is in the laser optical path of the laser transmitting and receiving system, and is beneficial to focusing and collecting energy of the laser optical path. While the internal focusing mirror 6 focuses on the imaging of the scene, it also focuses and collects energy from the laser reflection on scenes at different distances, because the imaging surface on the LCD display is synchronously associated with the light receiving surface of the APD (laser receiving sensor) during the optical design.

[0030] Embodiment 2:

[0031] This embodiment is modified based on the first embodiment, and the modification is to simplify the driving mechanism, such as Figure 8 As shown, the driving mechanism includes a sliding push-pull rod, an axial strip groove (not shown) is arranged on the housing, the middle part of the sliding push-pull rod passes through the axial strip groove and can slide back and forth along the axial strip groove, the tail end of the sliding push-pull rod is connected to the inner focusing lens, and the top end of the sliding push-pull rod is exposed to the housing. By toggling the sliding push-pull rod, the inner focusing lens 6 can also be moved left and right along the optical axis L so that the scenes at different distances can be imaged on the LCD display, which will not be described in detail here.

[0032] The above embodiments are preferred implementation modes of the present invention, but the implementation modes 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 all equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A monocular telescopic laser rangefinder with a novel focusing function, comprising a telescopic optical system and a laser transmitting and receiving system, wherein the telescopic optical system comprises an objective lens group, an inner focusing lens, a dichroic prism group, an LCD display and an eyepiece group arranged in sequence along an optical axis L from the scene side to the eye side, the objective lens group, the inner focusing lens, the dichroic prism group, the LCD display and the eyepiece group are installed in a housing, and the eyepiece group can be moved 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 vision can clearly view the image displayed on the LCD display. Features: An inner focusing lens is added between the objective lens group and the beam splitting prism group. The inner focusing lens can move left and right along the optical axis L to image scenes at different distances on the LCD display. The inner focusing lens is driven by a driving mechanism.

2. A monocular telescopic laser rangefinder with a novel focusing function according to claim 1, Features: The driving mechanism includes a focusing wheel, a push rod and a spring. The push rod is axially installed. A boss that gradually protrudes axially is provided on the end face of the focusing wheel. One end of the push rod is pressed against the boss. The spring is sleeved on the push rod. There is a step in the middle of the push rod. One end of the spring is pressed against the step, and the other end of the spring is pressed against the baffle. Under the action of the spring, one end of the push rod is always pressed against the boss. A lever is extended from the other end of the push rod, and the lever is used to drive the inner focusing mirror to move left and right along the optical axis L.

3. A monocular telescopic laser rangefinder with a novel focusing function according to claim 2, Features: The focus wheel is arranged at one end of the housing.

4. The monocular telescopic laser rangefinder with a novel focusing function according to claim 1, Features: The driving mechanism comprises a sliding push-pull rod, an axial strip groove is arranged on the shell, the middle part of the sliding push-pull rod passes through the axial strip groove and can slide back and forth along the axial strip groove, the tail end of the sliding push-pull rod is connected to the inner focusing lens, and the top end of the sliding push-pull rod is exposed outside the shell.

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