A large-aperture objective lens mechanism with a ranging function

Abstract

The utility model provides a kind of big aperture objective lens mechanism with ranging function, including objective lens barrel, several pieces of lens being installed in objective lens barrel, laser emission module and laser receiving module, several pieces of lens include the big aperture objective lens closest to object side, laser emission module and laser receiving module are installed on objective lens barrel, the emission port of laser emission module and the receiving port of laser receiving module are respectively arranged in the edge outside of big aperture objective lens;When working, laser emitted by laser emission module is irradiated on object and reflects back to laser receiving module, and the object distance is calculated, the visible light projected on object reflects back to objective lens barrel and forms enlarged real image by the refraction of several pieces of lens.It is larger, and the light quantity of admission is more, and the brighter imaging is;And simple structure, low in cost, installation and debugging are simple and convenient, manufacturing difficulty is greatly reduced, and it is strong in versatility.

Description

Technical Field

[0001] This utility model relates to a large aperture objective lens mechanism with distance measuring function. Background Technology

[0002] Currently, the objective lenses used in traditional rifle sights generally include rangefinding capabilities. These rangefinding objective lenses on the market are primarily small-aperture lenses: a focal length of 70mm, an aperture parameter (the ratio of lens focal length to effective lens diameter) of mostly F-number of 2.4, and an effective light-gathering diameter of approximately φ30.0 (front end). As is well known, the smaller the F-number of an objective lens, the larger the aperture, resulting in more light and a brighter image; conversely, the larger the F-number, the smaller the aperture, resulting in less light and a darker image. Furthermore, current small-aperture objectives cannot effectively integrate laser receiving modules, and the dual-tube design is not compact enough.

[0003] Therefore, current objective lens mechanisms with rangefinding capabilities mainly use small-aperture objectives, resulting in less light intake and darker images. It is necessary to develop a large-aperture objective lens mechanism.

[0004] In view of this, the applicant filed a patent application on September 5, 2024, namely, a utility model patent entitled "A Large Aperture Objective Lens Mechanism with Range Measurement Function," with patent application number 202422348581X. This patent effectively addresses the aforementioned technical issues. However, customer feedback indicates that the product still has shortcomings and needs improvement. The main shortcomings are: 1) The product requires the installation of an image-reversing beam splitter assembly, resulting in a complex structure, high cost, and significant inconvenience during installation and debugging; 2) The receiving optical path overlaps with the imaging optical path, increasing manufacturing difficulty and limiting application scope. Summary of the Invention

[0005] The purpose of this invention is to provide a large-aperture objective lens mechanism with rangefinding function, which solves the technical problems of existing large-aperture objective lens mechanisms with rangefinding function requiring an inverted beam splitter assembly, which has a complex structure, high cost, causes many inconveniences in installation and debugging, and the overlap of the receiving optical path and the imaging optical path increases the manufacturing difficulty of the product.

[0006] The technical solution of this utility model is implemented as follows: A large-aperture objective lens mechanism with ranging function includes an objective lens barrel, a plurality of lenses arranged at intervals along the optical axis L and installed inside the objective lens barrel, a laser emitting module and a laser receiving module, wherein the plurality of lenses include a large-aperture objective lens closest to the object side, characterized in that: the laser emitting module and the laser receiving module are installed on the objective lens barrel, and the emitting port of the laser emitting module and the receiving port of the laser receiving module are respectively arranged on the outer edge of the large-aperture objective lens; During operation, the laser emitted by the laser emitting module illuminates the object and is reflected back to the laser receiving module, which calculates the object distance. The visible light projected onto the object is reflected back to the objective lens tube and refracted by several lenses to form a magnified real image.

[0007] Preferably, the objective lens tube includes a large cylindrical section at the front end and a smaller cylindrical section with a smaller diameter located behind the large cylindrical section. A step is formed between the large cylindrical section and the small cylindrical section. The laser emitting module and the laser receiving module are mounted on the step. A mounting hole is cut out at the rear end of the large cylindrical section. The front ends of the laser emitting module and the laser receiving module are nested in the mounting hole. The large aperture objective lens is locked in the large cylindrical section by a locking ring. The locking ring is provided with a laser emitting hole and a laser receiving hole. The emitting port of the laser emitting module faces the laser emitting hole, and the receiving port of the laser receiving module faces the laser receiving hole.

[0008] Preferably, the plurality of lenses include a large-aperture objective lens, objective lens two, objective lens three, objective lens four, objective lens five, objective lens six and objective lens seven, which are arranged sequentially along the optical axis L between the object side and the image plane, wherein objective lens six and objective lens seven are cemented together.

[0009] Preferably, the effective aperture of the large-aperture objective lens is in the range of 40mm-50mm, and a notch is cut out at the edge of the large-aperture objective lens to avoid obstructing the laser emitting module and the laser receiving module.

[0010] Preferably, the laser emitting module and the laser receiving module are installed together in a housing. The housing is provided with a first mounting flange and a first screw mounting hole, so that the housing can be installed at the rear of the large cylindrical part by screws.

[0011] Preferably, a control circuit board is installed behind the laser emitting module and the laser receiving module, on the step.

[0012] Preferably, a second mounting flange is provided at the tail end of the objective lens barrel, and the second mounting flange is provided with a second screw hole.

[0013] Compared with the prior art, the present invention has the following technical advantages: 1) The objective lens of this utility model includes an objective lens barrel, a plurality of lenses arranged at intervals along the optical axis L inside the objective lens barrel, a laser emitting module, and a laser receiving module. The plurality of lenses include a large-aperture objective lens closest to the object side. The laser emitting module and the laser receiving module are mounted on the objective lens barrel. The emitting port of the laser emitting module and the receiving port of the laser receiving module are respectively arranged on the outer edge of the large-aperture objective lens. During operation, the laser emitted by the laser emitting module irradiates the object and is reflected back to the laser receiving module. The object distance is calculated. The visible light projected onto the object is reflected back to the objective lens barrel and refracted by the plurality of lenses to form a magnified real image. It has a large aperture, a large amount of light intake, and a brighter image. Moreover, it has a simple structure, low cost, and is simple and convenient to install and debug.

[0014] 2) The objective lens laser ranging optical path and the imaging optical path of this utility model are independent of each other, which greatly reduces the manufacturing difficulty, has strong versatility, and has a wide range of applications. Attached Figure Description

[0015] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0016] Figure 1 This is a perspective view of the present invention from one angle;

[0017] Figure 2 This is an exploded view of the present invention from one angle;

[0018] Figure 3 This is an exploded view of the present invention from another angle;

[0019] Figure 4 This is the front view of the present invention;

[0020] Figure 5 for Figure 4 AA sectional view. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0022] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] refer to Figures 1 to 5 As shown, this utility model provides A large-aperture objective lens mechanism with ranging function includes an objective lens barrel 1, a plurality of lenses 2 arranged at intervals along the optical axis L inside the objective lens barrel 1, a laser emitting module 3, and a laser receiving module 4. The plurality of lenses 2 includes a large-aperture objective lens 21 closest to the object side. The key feature is that the laser emitting module 3 and the laser receiving module 4 are mounted on the objective lens barrel 1, with the emission port 31 of the laser emitting module 3 and the receiving port 41 of the laser receiving module 4 respectively located on the outer edge of the large-aperture objective lens 21. During operation, the laser emitted by the laser emitting module 3 illuminates the object and is reflected back to the laser receiving module 4, where the object distance is calculated. The visible light projected onto the object is reflected back to the objective lens barrel 1 and refracted by the plurality of lenses 2 to form a magnified real image. It has a simple structure, low cost, and is easy and convenient to install and debug. The objective lens laser ranging optical path and the imaging optical path of this invention are independent, significantly reducing manufacturing difficulty, and it has strong versatility and a wide range of applications.

[0025] Preferably, the objective lens tube 1 includes a large cylindrical section 11 at the front end and a smaller cylindrical section 12 with a smaller diameter located behind the large cylindrical section 11. A step 13 is formed between the large cylindrical section 11 and the smaller cylindrical section 12. The laser emitting module 3 and the laser receiving module 4 are mounted on the step 13. A mounting hole 111 is cut out at the rear end of the large cylindrical section 11. The front ends of the laser emitting module 3 and the laser receiving module 4 are nested in the mounting hole 111. The large aperture objective lens 21 is locked in the large cylindrical section 11 by a locking ring 5. A laser emitting hole 51 and a laser receiving hole 52 are provided on the locking ring 5. The emitting port 31 of the laser emitting module 3 faces the laser emitting hole 51, and the receiving port 41 of the laser receiving module 4 faces the laser receiving hole 52. It has a simple structure and is easy to install.

[0026] Preferably, the plurality of lenses 2 include a large-aperture objective lens 21, an objective lens 22, an objective lens 23, an objective lens 24, an objective lens 25, an objective lens 26, and an objective lens 27. The large-aperture objective lens 21, an objective lens 22, an objective lens 23, an objective lens 24, an objective lens 25, an objective lens 26, and an objective lens 27 are arranged sequentially along the optical axis L between the object side and the image plane. Among them, the objective lens 26 and the objective lens 27 are cemented together, which has a simple structure and strong versatility.

[0027] Preferably, the effective aperture of the large aperture objective lens 21 is in the range of 40mm-50mm. A notch 211 is cut out on the edge of the large aperture objective lens 21 to avoid blocking the laser emitting module 3 and the laser receiving module 4. In addition, the effective aperture range of 40mm-50mm can obtain a large light flux.

[0028] Preferably, the laser emitting module 3 and the laser receiving module 4 are installed together in a housing. The housing is provided with a first mounting flange 101 and a first screw mounting hole 102, so that the housing can be installed behind the large cylindrical part 11 by screws.

[0029] Preferably, the control circuit board 6 is installed on the step 13 behind the laser emitting module 3 and the laser receiving module 4, which has a reasonable structural layout and is easy to install.

[0030] Preferably, a second mounting flange 15 is provided at the tail of the objective lens tube 1, and a second screw hole 16 is provided on the second mounting flange 15.

[0031] The above embodiments merely illustrate specific implementations of the utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A large-aperture objective lens mechanism with ranging function, comprising an objective lens barrel (1), a plurality of lenses (2) arranged at intervals along the optical axis L and mounted inside the objective lens barrel (1), a laser emitting module (3), and a laser receiving module (4), wherein the plurality of lenses (2) includes a large-aperture objective lens (21) closest to the object side, characterized in that: The laser emitting module (3) and the laser receiving module (4) are mounted on the objective lens tube (1). The emission port (31) of the laser emitting module (3) and the receiving port (41) of the laser receiving module (4) are respectively arranged on the outer edge of the large aperture objective lens (21). When working, the laser emitted by the laser emitting module (3) irradiates the object and is reflected back to the laser receiving module (4), and the object distance is calculated. The visible light projected onto the object is reflected back to the objective lens tube (1) and refracted by several lenses (2) to form a magnified real image.

2. The large-aperture objective lens mechanism with ranging function as described in claim 1, characterized in that: The objective lens tube (1) includes a large cylindrical part (11) at the front end and a small cylindrical part (12) with a smaller diameter at the rear of the large cylindrical part (11). A step (13) is formed between the large cylindrical part (11) and the small cylindrical part (12). The laser emitting module (3) and the laser receiving module (4) are mounted on the step (13). A mounting hole (111) is dug out at the tail of the large cylindrical part (11). The front ends of the laser emitting module (3) and the laser receiving module (4) are nested in the mounting hole (111). The large aperture objective lens (21) is locked in the large cylindrical part (11) by a locking ring (5). A laser emitting hole (51) and a laser receiving hole (52) are provided on the locking ring (5). The emitting port (31) of the laser emitting module (3) faces the laser emitting hole (51), and the receiving port (41) of the laser receiving module (4) faces the laser receiving hole (52).

3. A large-aperture objective lens mechanism with ranging function as described in claim 1 or 2, characterized in that: Several lenses (2) include a large aperture objective (21), objective two (22), objective three (23), objective four (24), objective five (25), objective six (26) and objective seven (27). The large aperture objective (21), objective two (22), objective three (23), objective four (24), objective five (25), objective six (26) and objective seven (27) are arranged sequentially along the optical axis L between the object side and the image plane, wherein objective six (26) and objective seven (27) are cemented together.

4. The large-aperture objective lens mechanism with ranging function as described in claim 3, characterized in that: The effective aperture of the large aperture objective (21) is in the range of 40mm-50mm. A notch (211) is cut out on the edge of the large aperture objective (21) to avoid blocking the laser emitting module (3) and the laser receiving module (4).

5. The large-aperture objective lens mechanism with ranging function as described in claim 4, characterized in that: The laser emitting module (3) and the laser receiving module (4) are installed together in a housing. The housing is provided with a first mounting flange (101) and a first screw mounting hole (102) is provided in the first mounting flange (101) so that the housing can be installed behind the large cylindrical part (11) by screws.

6. The large-aperture objective lens mechanism with ranging function as described in claim 5, characterized in that: A control circuit board (6) is installed on the step (13) behind the laser emitting module (3) and the laser receiving module (4).

7. The large-aperture objective lens mechanism with ranging function as described in claim 6, characterized in that: A second mounting flange (15) is provided at the tail of the objective lens tube (1), and a second screw hole (16) is provided on the second mounting flange (15).

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