Large-aperture objective lens mechanism with distance measuring function

Abstract

The utility model provides a large aperture objective lens mechanism with a distance measuring function, which comprises an objective lens barrel, and a plurality of lenses, a laser transmitting module and a laser receiving module which are arranged in the objective lens barrel, and is characterized in that the plurality of lenses comprise an objective lens I, an objective lens II, an objective lens III, an objective lens IV, an objective lens V, an objective lens VI and an objective lens VII; the objective lens 1, the objective lens 2, the objective lens 3, the objective lens 4, the objective lens 5, the objective lens 6 and the objective lens 7 are sequentially arranged from the object side to the image side along the optical axis S. The objective lens 2 and the objective lens 3 are glued together to form a glued lens 1, and the objective lens 4 and the objective lens 5 are glued together to form a glued lens 2. The radial sizes of the objective lens I, the glued lens I, the glued lens II, the objective lens VI and the objective lens VII are gradually reduced, and the effective clear aperture of the objective lens I is greater than 40mm. The aperture is large, the light incoming amount is large, and the image is brighter; and the structure is compact.

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: most have a focal length of 70mm, an aperture (the ratio of lens focal length to effective lens diameter) of F-number of 2.4, and an effective aperture diameter of approximately φ30.0 (front end). As is well known, a smaller F-number results in a larger aperture, allowing more light in and producing a brighter image; conversely, a larger F-number results in a smaller aperture, less light in, and a darker image. Furthermore, current small-aperture objectives cannot effectively integrate laser receiver 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. Summary of the Invention

[0004] The purpose of this invention is to provide a large-aperture objective lens mechanism with rangefinding function, which solves the technical problem of low light intake and darker imaging in existing small-aperture objective lenses with rangefinding function.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A large-aperture objective lens mechanism with ranging function includes an objective lens barrel and several lenses, a laser emitting module, and a laser receiving module installed inside the objective lens barrel. The mechanism is characterized in that the lenses include objective lens one, 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 S from the object side to the image side. Specifically, objective lens two and objective lens three are cemented together to form cemented lens one, objective lens four and objective lens five are cemented together to form cemented lens two, and the radial dimensions of objective lens one, cemented lens one, cemented lens two, objective lens six, and objective lens seven gradually decrease. The effective aperture of objective lens one is greater than 40 mm.

[0007] Preferably, the effective aperture of the first objective lens is in the range of 40mm-50mm, and a notch is cut out at the edge of the first objective lens so that the laser emission module passes through the notch.

[0008] Preferably, the objective tube includes a large objective tube with a larger diameter at the front end and a small objective tube with a smaller diameter at the rear end. There is a step transition at the junction of the large objective tube and the small objective tube. Objectives 1, 2 and 3 are installed in the large objective tube, and objectives 4, 5, 6 and 7 are installed in the small objective tube.

[0009] Preferably, a mounting hole is drilled at the step, and the laser emitting module is nested in the mounting hole and passes through the notch.

[0010] Preferably, a through hole is provided in the middle of the tail end face of the small lens tube, a flange is installed on the tail end face of the small lens tube, a cavity is provided in the middle of the flange for installing the beam splitter prism, the light emitted from the objective lens enters the beam splitter prism through the through hole, and a prism cover plate is installed on the flange.

[0011] Preferably, the outer surface of the large microscope tube is provided with external threads, and a locking ring is fitted on the outside of the large microscope tube. The locking ring is threadedly connected to the large microscope tube, and a decorative ring is installed inside the locking ring, which presses on the objective lens.

[0012] Preferably, the laser emitting module includes an emitting tube and an emitting assembly.

[0013] Preferably, objective lens two and objective lens three are cemented together to form cemented lens one, and cemented lens one is fixed inside the large microscope tube by applying adhesive.

[0014] Preferably, objective lenses four and five are installed inside the small microscope tube via locking ring two, objective lens six is ​​installed inside the small microscope tube via locking ring three, and a spacer is provided between objective lenses six and seven.

[0015] Preferably, a circuit board assembly is mounted on the outer side of the small lens barrel.

[0016] Compared with the prior art, the present invention has the following technical advantages:

[0017] 1) Objective lens 1, objective lens 2, objective lens 3, objective lens 4, objective lens 5, objective lens 6 and objective lens 7 of this utility model are arranged sequentially along the optical axis S from the object side to the image side. Among them, objective lens 2 and objective lens 3 are cemented together to form cemented lens 1, objective lens 4 and objective lens 5 are cemented together to form cemented lens 2. The radial dimensions of objective lens 1, cemented lens 1, cemented lens 2, objective lens 6 and objective lens 7 gradually decrease. The effective light transmission diameter of objective lens 1 is greater than 40mm, the aperture is large, the light intake is large, and the image is brighter. According to the calculation, the objective lens product of this utility model has a focal length of 70mm, a large aperture, an F value of 1.6, and an effective light transmission diameter of ∅43.8 (front end).

[0018] 2) The objective lens tube of this utility model comprises a large tube with a larger diameter at the front end and a small tube with a smaller diameter at the rear end. A stepped transition is present at the junction of the large and small tubes. Objective lenses one, two, and three are installed inside the large tube, while objectives four, five, six, and seven are installed inside the small tube. Mounting holes are cut into the stepped transition area, and the laser emission module is nested within these holes and passes through a notch. The structure is relatively compact. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a perspective view of the present invention from one angle;

[0021] Figure 2 This is a perspective view of the present invention from another angle;

[0022] Figure 3 This is the front view of the present invention;

[0023] Figure 4 for Figure 3 AA section view;

[0024] Figure 5 This is a partial exploded view of the present invention;

[0025] Figure 6 This is another partially exploded view of the present invention;

[0026] Figure 7 This is the optical path diagram of this utility model. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] refer to Figures 1 to 7As shown, this utility model provides 1. A large-aperture objective lens mechanism with ranging function, including an objective lens barrel 1 and a plurality of lenses 2, a laser emitting module 3 and a laser receiving module 4 installed inside the objective lens barrel 1, characterized in that: the plurality of lenses 2 include objective lens one 21, objective lens two 22, objective lens three 23, objective lens four 24, objective lens five 25, objective lens six 26 and objective lens seven 27, objective lens one 21, objective lens two 22, objective lens three 23, objective lens four 24, objective lens five 25, objective lens six 26 and objective lens seven 27 are arranged sequentially along the optical axis S from the object side to the image side, wherein: objective lens two 22 and objective lens three 23 are cemented together to form cemented lens one, objective lens four 24 and objective lens five 25 are cemented together to form cemented lens two, the radial dimensions of objective lens one 21, cemented lens one, cemented lens two, objective lens six 26 and objective lens seven 27 gradually decrease, and the effective light transmission aperture of objective lens one 21 is greater than 40mm. This invention features a large aperture, allowing for more light intake and resulting in a brighter image. Calculations show that the objective lens of this invention has a focal length of 70mm, a large aperture of F-number 1.6, and an effective light-gathering diameter of ∅43.8 (front end).

[0031] Preferably, the effective aperture of objective lens 21 is in the range of 40mm-50mm, and a notch 211 is cut out on the edge of objective lens 21, through which the laser emitting module 3 passes, making the structure more compact.

[0032] Preferably, the objective tube 1 includes a large objective tube 11 with a larger diameter at the front end and a small objective tube 12 with a smaller diameter at the rear end. There is a step 13 at the junction of the large objective tube 11 and the small objective tube 12. Objectives 1 21, 22 and 3 23 are installed in the large objective tube 11, and objectives 4 24, 5 25, 6 26 and 7 27 are installed in the small objective tube 12. The structure is simple and the layout is reasonable.

[0033] Preferably, a mounting hole 131 is drilled at step 13, and the laser emitting module 3 is nested in the mounting hole 131 and passes through the notch 211. The structure is simple, easy to install, and reasonably designed.

[0034] Preferably, a through hole 121 is provided in the middle of the tail end face of the small lens tube 12, and a flange 5 is installed on the tail end face of the small lens tube 12. A cavity 51 is provided in the middle of the flange 5 for installing the beam splitter prism 28. The light emitted from the objective lens 27 enters the beam splitter prism 28 through the through hole 121. A prism cover plate 6 is installed on the flange 5. The structure is reasonable and the installation is simple.

[0035] Preferably, the outer surface of the large lens barrel 11 is provided with an external thread 111, and a locking ring 7 is fitted on the outside of the large lens barrel 11. The inner wall of the locking ring 7 is provided with an internal thread 71. The locking ring 7 is threadedly connected to the large lens barrel 11. A decorative ring 8 is installed inside the locking ring 7 and presses on the objective lens 21. The structure is simple and the installation is convenient.

[0036] Preferably, the laser emitting module 3 includes an emitting tube 31 and an emitting component 32.

[0037] Preferably, objective lens 22 and objective lens 3 23 are glued together to form a glued lens 1. The glued lens 1 is fixed inside the large lens barrel 11 by applying glue. The process is simple and easy to manufacture and install.

[0038] Preferably, objective lens 4 24 and objective lens 5 25 are installed inside the small lens tube 12 by locking ring 2 91, objective lens 6 26 is installed inside the small lens tube 12 by locking ring 3 92, and a spacer ring 10 is provided between objective lens 6 26 and objective lens 7 27. The structure is simple and easy to install.

[0039] Preferably, the circuit board assembly 14 is installed on the outer side of the small lens barrel 12, which is a reasonable layout.

[0040] 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 distance measurement function, comprising an objective lens barrel (1) and a plurality of lenses (2) installed in the objective lens barrel (1), a laser emission module (3) and a laser receiving module (4), characterized in that: Several lenses (2) include objective lens 1 (21), objective lens 2 (22), objective lens 3 (23), objective lens 4 (24), objective lens 5 (25), objective lens 6 (26) and objective lens 7 (27). Objective lens 1 (21), objective lens 2 (22), objective lens 3 (23), objective lens 4 (24), objective lens 5 (25), objective lens 6 (26) and objective lens 7 (27) are arranged sequentially along the optical axis S from the object side to the image side. Among them, objective lens 2 (22) and objective lens 3 (23) are cemented together to form cemented lens 1, objective lens 4 (24) and objective lens 5 (25) are cemented together to form cemented lens 2. The radial dimensions of objective lens 1 (21), cemented lens 1, cemented lens 2, objective lens 6 (26) and objective lens 7 (27) gradually decrease. The effective light transmission aperture of objective lens 1 (21) is greater than 40mm.

2. The large aperture objective lens mechanism with a distance measuring function according to claim 1, characterized by: The effective aperture of objective lens 1 (21) is in the range of 40mm-50mm. A notch (211) is cut out on the edge of objective lens 1 (21), and the laser emission module (3) passes through the notch (211).

3. The large aperture objective lens mechanism with a distance measuring function according to claim 2, characterized by: The objective tube (1) includes a large objective tube (11) with a larger diameter at the front end and a small objective tube (12) with a smaller diameter at the rear end. There is a step (13) at the junction of the large objective tube (11) and the small objective tube (12). Objectives 1 (21), 2 (22) and 3 (23) are installed in the large objective tube (11), and objectives 4 (24), 5 (25), 6 (26) and 7 (27) are installed in the small objective tube (12).

4. The large aperture objective lens mechanism with a distance measuring function according to claim 3, characterized by: A mounting hole (131) is dug at the step (13), and the laser emitting module (3) is nested in the mounting hole (131) and passes through the notch (211).

5. The large aperture objective lens mechanism with a distance measuring function according to claim 4, characterized by: A through hole (121) is provided in the middle of the tail end face of the small lens tube (12). A flange (5) is installed on the tail end face of the small lens tube (12). A cavity is provided in the middle of the flange (5) for installing a beam splitter prism (28). Light emitted from the objective lens (27) enters the beam splitter prism (28) through the through hole (121). A prism cover plate (6) is installed on the flange (5).

6. The large aperture objective lens mechanism with a distance measuring function according to claim 4, characterized by: The outer surface of the large lens barrel (11) is provided with an external thread (111). A locking ring (7) is fitted on the outside of the large lens barrel (11). An internal thread (71) is provided on the inner wall of the locking ring (7). The locking ring (7) is threadedly connected to the large lens barrel (11). A decorative ring (8) is installed inside the locking ring (7). The decorative ring (8) is pressed on the objective lens (21).

7. A large aperture objective lens mechanism with a distance measuring function according to any one of claims 1 to 6, characterized in that: The laser emitting module (3) includes an emitting tube (31) and an emitting assembly (32).

8. The large aperture objective lens mechanism with a distance measuring function according to claim 6, characterized by: The laminated lens is fixed inside the large lens barrel (11) by applying adhesive.

9. The large aperture objective lens mechanism with a distance measuring function according to claim 8, characterized by: Objective lens 4 (24) and objective lens 5 (25) are installed in the small tube (12) by locking ring 2 (91), objective lens 6 (26) is installed in the small tube (12) by locking ring 3 (92), and a spacer (10) is provided between objective lens 6 (26) and objective lens 7 (27).

10. The large aperture objective lens mechanism with a distance measuring function according to claim 9, characterized by: A circuit board assembly (14) is installed on the outer side of the small lens tube (12).

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