Infrared lens with built-in laser ranging

Abstract

The utility model provides an infrared lens with built-in laser ranging, and belongs to the technical field of infrared optical lenses. The infrared lens with the built-in laser ranging function comprises a built-in laser ranging ring and an infrared lens group mounted on the inner ring of the built-in laser ranging ring, and is characterized in that the built-in laser ranging ring is arranged in a lens barrel, and a front positioning part and a rear positioning part are mounted at the two ends in the lens barrel respectively; the opposite ends of the front positioning part and the rear positioning part are clamped and attached to the edges of the outer walls of the two ends of the built-in laser ranging ring respectively, protective piece parts are attached to the separated ends of the front positioning part and the rear positioning part, and the side walls of the protective piece parts are attached to the inner side walls of the front positioning part and the rear positioning part; through cooperative cooperation of the front positioning part and the rear positioning part which are in threaded connection with the two ends in the lens barrel and the protection sheet part, the outer lens sheet can be effectively prevented from being scratched or polluted.

Description

Technical Field

[0001] This application relates to the field of infrared optical lens technology, and more specifically, to an infrared lens with built-in laser ranging. Background Technology

[0002] An infrared lens with built-in laser ranging is a device that integrates laser ranging and infrared imaging technologies, widely used in military, security, surveying, and industrial inspection fields. This lens measures target distance through a laser emission and reception system while simultaneously using infrared imaging technology to capture the target's temperature distribution information, thereby achieving accurate measurement and target identification. Its core advantages lie in its ability to operate in low-light or no-light environments and its high-precision, non-contact measurement capabilities.

[0003] Currently, existing infrared lenses with built-in laser rangefinders typically use external lens elements made of materials with certain optical properties. However, in practical use, these devices suffer from a significant technical problem: the external lens elements are easily scratched and dusty. This directly affects the image quality of the device, leading to laser rangefinder signal attenuation or even complete failure. Scratches and dust not only reduce the device's performance but also shorten its lifespan, especially noticeable in outdoor or harsh environments. Utility Model Content

[0004] To overcome the above shortcomings, this application provides an infrared lens with built-in laser ranging to solve the problem mentioned in the background art that the outer lens of the existing infrared lens with built-in laser ranging is easily scratched and dusty during use.

[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] An infrared lens with built-in laser ranging includes a built-in laser ranging ring and an infrared lens assembly mounted on the inner ring of the built-in laser ranging ring. The built-in laser ranging ring is located inside a lens barrel. A front positioning component and a rear positioning component are respectively installed at both ends inside the lens barrel. The opposite ends of the front and rear positioning components are clamped and fitted to the outer edges of the two ends of the built-in laser ranging ring, and protective sheet components are adhered to the opposite ends. The sidewalls of the protective sheet components are fitted to the inner sidewalls of the front and rear positioning components.

[0007] Furthermore, the outer wall of the lens barrel is integrally formed with a raised strip, the outer ends of several raised strips are chamfered and there are gaps between them, and the lens barrel is provided with the built-in laser ranging ring, the infrared lens group, the front positioning component and the rear positioning component.

[0008] Furthermore, the front positioning component includes a front cylinder, a protective lens, a first external thread, and a first internal thread. The front cylinder has the first external thread at its outer end, the protective lens is embedded inside the front cylinder, and the lens barrel has the first internal thread at one end of its inner wall. The front cylinder is threadedly connected to the first internal thread inside the lens barrel through the first external thread.

[0009] Furthermore, the rear positioning component includes a rear cylinder, a plane mirror, a second external thread, and a second internal thread. The outer end of the rear cylinder is provided with the second external thread, the plane mirror is mounted in front of the rear cylinder, and the other end of the inner wall of the lens cylinder is provided with the second internal thread. The rear cylinder is threadedly connected to the second internal thread inside the lens cylinder through the second external thread.

[0010] Furthermore, the protective sheet component includes several protective film layers and several pinch protrusions, with several pinch protrusions integrally formed on the sidewalls of the several protective film layers, and respectively adhered to the outer surfaces of the protective lens and the plane mirror.

[0011] Furthermore, the laser transmitting and receiving end of the built-in laser ranging ring faces the protective lens and is located between the front tube and the infrared lens group.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model provides double protection for the lens element through a front and rear positioning component threaded at both ends inside the lens barrel, and several protective film layers respectively adhered to the outer surface of the plane mirror of the protective lens. Before the lens actually operates, these protective film layers cover the critical protective lens and plane mirror surfaces. This is like putting a "protective cap" on the lens, greatly reducing the possibility of dust and sand particles in the external environment directly contacting and scratching the optical lens, thus effectively preventing scratches and dust accumulation.

[0014] 2. The pinch-point protrusion design on the sidewall of the protective film layer of this utility model allows users to easily pinch and tear off the used protective film layer by hand. When the outer protective film layer is contaminated or scratched, only the first layer needs to be peeled off, leaving the subsequent protective film layers, without the need to directly clean the delicate optical lens. This avoids the risk of lens damage due to improper cleaning operations and greatly simplifies the maintenance process. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the infrared lens structure with built-in laser ranging provided in the embodiments of this application;

[0017] Figure 2 A schematic diagram of the internal structure of the lens barrel provided for an embodiment of this application;

[0018] Figure 3 A schematic diagram of the front positioning component structure provided for an embodiment of this application;

[0019] Figure 4 A schematic diagram of the rear positioning component structure provided for an embodiment of this application;

[0020] Figure 5 A schematic diagram of the protective sheet component structure provided in the embodiments of this application.

[0021] In the diagram: 1-Built-in laser rangefinder ring; 2-Infrared lens group; 3-Lens barrel; 4-Front positioning component; 5-Rear positioning component; 6-Protective sheet component; 31-Protruding strip; 41-Front barrel; 42-Protective lens; 43-First external thread; 44-First internal thread; 51-Rear barrel; 52-Planar mirror; 53-Second external thread; 54-Second internal thread; 61-Protective film layer; 62-Pinch point protrusion. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0023] Example:

[0024] Please see Figure 1 , Figure 2 An infrared lens with built-in laser ranging includes a built-in laser ranging ring 1 and an infrared lens group 2 installed on the inner ring of the built-in laser ranging ring 1.

[0025] The built-in laser ranging ring 1 has an overall annular structure. Its outer diameter matches the internal space of the lens barrel 3, while its inner diameter is precisely designed to accommodate the infrared lens assembly 2. This ring is primarily made of high-precision metal to ensure sufficient strength and heat dissipation. The outer edges at both ends are precision-machined to form flat surfaces for clamping and fitting with the front positioning component 4 and the rear positioning component 5. The built-in laser ranging ring 1 utilizes existing technology in the field and will not be described in detail further.

[0026] The infrared lens assembly 2 is a precision optical component, typically made of multiple infrared lenses with different refractive indices, such as germanium (Ge), zinc sulfide (ZnS), and zinc selenide (ZnSe), combined according to a specific optical design, such as refractive, reflective, or catadioptric configurations, to focus the infrared radiation of the target onto the infrared detector. This lens assembly is designed to be precisely mounted within the inner ring of the built-in laser ranging ring 1. During installation, the infrared lens assembly 2 is securely fixed to the inner ring of the built-in laser ranging ring 1, ensuring that it remains relatively stationary with the built-in laser ranging ring 1, and that its optical axis is spatially aligned with the optical axis of the laser ranging system. The infrared lens assembly 2 utilizes existing technology in the field and will not be described in detail further.

[0027] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 An infrared lens with built-in laser ranging includes a built-in laser ranging ring 1 placed inside a lens barrel 3. A front positioning component 4 and a rear positioning component 5 are respectively installed at both ends inside the lens barrel 3. The opposite ends of the front positioning component 4 and the rear positioning component 5 are clamped and attached to the outer edges of the two ends of the built-in laser ranging ring 1, and a protective sheet component 6 is attached to the opposite ends. The side wall of the protective sheet component 6 is attached to the inner side wall of the front positioning component 4 and the rear positioning component 5. A raised strip 31 is integrally formed on the outer wall of the lens barrel 3. The front positioning component 4 includes a front cylinder 41, a protective lens 42, a first external thread 43 and a first internal thread 44. The rear positioning component 5 includes a rear cylinder 51, a plane mirror 52, a second external thread 53 and a second internal thread 54. The protective sheet component 6 includes several protective film layers 61 and several pinch-point protrusions 62.

[0028] The lens barrel 3 serves as the outer shell and supporting frame of the entire lens structure, typically cylindrical in shape. Its primary function is to secure the internal optical components and provide structural strength and protection for the entire lens. The lens barrel 3 is generally made of lightweight yet high-strength materials, ensuring sufficient rigidity to maintain precise alignment of the internal optical system while controlling overall weight. A ring of raised strips 31 is integrally molded onto the outer wall of the lens barrel 3. This "integral molding" means that the raised strips 31 and the main body of the lens barrel 3 are processed or injection molded simultaneously, ensuring structural integrity and strength. These raised strips 31 are evenly distributed around the outer perimeter of the lens barrel 3. The outer edges of the raised strips 31 are chamfered. This treatment removes sharp edges, preventing scratches to operators or interference with other components during assembly, transportation, or use. Chamfering also improves grip comfort. Significant gaps are maintained between the raised strips 31. These gaps are not only for aesthetics but, more importantly, allow users to insert their fingers into these gaps for a more secure grip on the lens barrel 3, facilitating installation, disassembly, or transport. Furthermore, while ensuring structural strength, the weight of the lens barrel can be appropriately reduced by setting gaps. These gaps also facilitate airflow, potentially aiding in heat dissipation for the lens barrel 3 and its internal components.

[0029] The front positioning component 4 is used to position the front end of the built-in laser ranging ring 1 and protect the internal structure of the front end of the lens barrel 3. The front barrel 41 is the main body of the front positioning component 4, and is usually cylindrical or cylindrical with a specific end face. Its interior is designed with a groove for embedding the protective lens 42. On the outside of the front barrel 41, at the end away from the front of the protective lens 42, a standard first external thread 43 is machined for threaded connection with the first internal thread 44 on the inner wall of the lens barrel 3. The length and diameter of the front barrel 41 are precisely designed to ensure that after assembly, it can firmly support the protective lens 42 and achieve precise axial positioning and radial clamping with the front end of the built-in laser ranging ring 1. At the same time, the protective lens 42 is precisely positioned by the front barrel 41 on the laser emission and reception path, protecting it from direct scratches and contamination from the external environment.

[0030] The rear positioning component 5 is used to position the rear end of the built-in laser ranging ring 1 and protect the internal structure of the rear end of the lens barrel 3. The rear barrel 51 is the main body of the rear positioning component 5, and is usually cylindrical or cylindrical with a specific end face. Its interior is designed with a groove for mounting the plane mirror 52 to ensure that the plane mirror 52 is firmly and accurately positioned. The exterior of the rear barrel 51 is machined with a second external thread 53 for threaded connection with the second internal thread 54 inside the lens barrel 3. At the same time, the plane mirror 52 is accurately positioned in the optical path by the rear barrel 51 to perform its preset optical function.

[0031] The protective sheet component 6 protects the outer surfaces of the protective lens 42 and the plane mirror 52. The protective film layer 61 is the main body of the protective sheet component 6, typically made of multiple layers of transparent material with good optical transmittance, especially for laser wavelengths and infrared bands, and high surface hardness and wear resistance. The protective film layer 61 is firmly attached to the outer surfaces of the protective lens 42 and the plane mirror 52 through an adhesive layering method, but will not damage the optical surfaces or leave difficult-to-remove adhesive residue when removal is required. Adhesive backing is usually used for adhesion; the adhesive must be optical grade, low-leaching, and weather-resistant. The pinch protrusion 62 is a small protrusion integrally formed from the sidewall of the protective film layer 61. When the protective film layer 61 needs to be removed, the user can easily pinch the pinch protrusion 62 to peel off the protective film layer 61 more easily and securely, avoiding direct contact between fingers and the delicate optical surfaces.

[0032] The working principle of this built-in laser ranging infrared lens is as follows: During use, infrared radiation is imaged through the protective lens 42 and the infrared lens group 2 to generate a thermal image; simultaneously, the laser ranging system emits a laser and receives the reflected signal to calculate the distance. The precise structural design ensures stable alignment of the optical system, while the innovative protective lens component 6 effectively solves the problem of easy scratching and dust accumulation on the lens, protecting critical optical surfaces, extending equipment lifespan, and ensuring continuous stability of ranging and imaging functions.

[0033] It should be noted that the specific models and specifications of the built-in laser ranging ring 1, infrared lens group 2, infrared lens group 42, and plane mirror 52 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0034] The power supply and operating principle of the built-in laser ranging ring 1 and infrared lens group 2 are clear to those skilled in the art and will not be described in detail here.

[0035] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An infrared lens with built-in laser ranging, comprising a built-in laser ranging ring (1) and an infrared lens group (2) mounted in the inner circle of the built-in laser ranging ring (1), characterized in that: The built-in laser ranging ring (1) is placed inside the lens barrel (3). A front positioning component (4) and a rear positioning component (5) are respectively installed at both ends inside the lens barrel (3). The opposite ends of the front positioning component (4) and the rear positioning component (5) are clamped and attached to the outer edges of the two ends of the built-in laser ranging ring (1), and a protective sheet component (6) is attached to the opposite ends. The side wall of the protective sheet component (6) is attached to the inner side wall of the front positioning component (4) and the rear positioning component (5).

2. The infrared lens with built-in laser ranging according to claim 1, characterized in that, The lens barrel (3) has an integrally formed raised strip (31) on its outer wall. The outer ends of the raised strip (31) are chamfered and there are gaps between them. The lens barrel (3) is equipped with the built-in laser ranging ring (1), the infrared lens group (2), the front positioning component (4), and the rear positioning component (5).

3. An infrared lens with built-in laser ranging according to claim 2, characterized in that, The front positioning component (4) includes a front cylinder (41), a protective lens (42), a first external thread (43), and a first internal thread (44). The front cylinder (41) has the first external thread (43) at its outer end. The protective lens (42) is embedded inside the front cylinder (41). The lens barrel (3) has the first internal thread (44) at one end of its inner wall. The front cylinder (41) is threadedly connected to the first internal thread (44) inside the lens barrel (3) through the first external thread (43).

4. An infrared lens with built-in laser ranging according to claim 3, characterized in that, The rear positioning component (5) includes a rear cylinder (51), a plane mirror (52), a second external thread (53), and a second internal thread (54). The rear cylinder (51) has the second external thread (53) at its outer end. The plane mirror (52) is mounted in front of the rear cylinder (51). The lens barrel (3) has the second internal thread (54) at its other end. The rear cylinder (51) is threadedly connected to the second internal thread (54) inside the lens barrel (3) through the second external thread (53).

5. An infrared lens with built-in laser ranging according to claim 4, characterized in that, The protective sheet component (6) includes several protective film layers (61) and several pinch protrusions (62). Several pinch protrusions (62) are integrally formed on the sidewalls of several protective film layers (61) and are respectively adhered to the outer surfaces of the protective lens (42) and the plane mirror (52).

6. An infrared lens with built-in laser ranging according to claim 5, characterized in that, The laser transmitting and receiving end of the built-in laser ranging ring (1) faces the protective lens (42) and is located between the front tube (41) and the infrared lens group (2).

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