Optical imaging ranging lens and optical sighting device
By extending the optical rangefinder into the main lens barrel and directly fixing it to it, the problems of large size and aiming deviation of optical imaging rangefinder lenses are solved, achieving miniaturization and precise aiming.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU MICROIMAGE SOFTWARE CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-21
AI Technical Summary
Existing optical imaging rangefinder lenses have a large size and a large distance between the optical axis and the optical axis of the imaging component because the optical rangefinder is located outside the imaging component, resulting in aiming deviation.
By extending at least part of the optical rangefinder into the main lens barrel and directly fixing it to the main lens barrel, the adapter bracket is eliminated, the size of the optical imaging rangefinder lens and the optical axis spacing are reduced, and aiming accuracy is improved.
It achieves miniaturization of the optical imaging rangefinder lens and improves aiming accuracy, reduces optical axis error and weight, and has better appearance coordination.
Smart Images
Figure CN224536246U_ABST
Abstract
Description
Technical Field
[0001] This application relates to optical equipment, and more particularly to optical imaging rangefinders and optical aiming devices. Background Technology
[0002] An optical imaging rangefinder lens consists of an imaging component and an optical rangefinder. The imaging component may be an infrared imaging component. The imaging information from the imaging component and the distance information from the optical rangefinder are processed by software to obtain a result, which the user can use to more accurately aim at the target.
[0003] However, the optical ranging device of existing optical imaging rangefinders is located outside the imaging component (or optical imaging rangefinder). On the one hand, this makes the optical imaging rangefinder larger in size and unable to meet the requirements of miniaturization. On the other hand, the distance between the optical axis of the optical ranging device and the optical axis of the imaging component (such as the optical axis of an infrared lens) is large, which will cause aiming deviation when measuring the distance to the target, thus making it difficult to aim at the target. Utility Model Content
[0004] The purpose of this application is to disclose an optical imaging rangefinder lens and an optical aiming device. The optical imaging rangefinder lens is not only small in size, but also advantageous for aiming at targets.
[0005] In a first aspect, this application discloses an optical imaging rangefinder lens. The optical imaging rangefinder lens includes a main lens barrel and an optical rangefinder device, wherein the optical rangefinder device extends at least partially into the main lens barrel and is directly fixedly connected to the interior of the main lens barrel.
[0006] In some embodiments, a radial plane parallel to the main lens barrel is used as the projection plane, and the projection of the optical ranging device is located within the projection of the inner surface of the main lens barrel.
[0007] In some embodiments, the optical imaging rangefinder lens includes an imaging component, and the optical rangefinder includes a protrusion in the circumferential direction. The protrusion protrudes along a first direction, which is a direction perpendicular to the optical axis of the imaging component. The protrusion is attached to and fixed to the interior of the main lens barrel.
[0008] In some embodiments, the optical imaging rangefinder lens includes a front lens, which is a first optical lens located at the front end of the main lens barrel; the optical rangefinder is assembled with the front lens in a limiting manner.
[0009] In some embodiments, the edge of the front lens includes a notch; the optical ranging device is positioned within the notch.
[0010] In some embodiments, the housing of the optical ranging device includes a mounting portion located within the notch, and the shape of the outline of the mounting portion is similar to the shape of the notch.
[0011] In some embodiments, an elastic element and / or a sealing element are provided between the housing of the optical ranging device and the groove wall of the notch.
[0012] In some embodiments, the radius of the front lens is R, and the distance between the centerline of the front lens and the bottom wall of the notch is r, where r / R ≥ 0.3.
[0013] In some embodiments, the optical imaging rangefinder lens includes a cap located at the front end of the main lens barrel and includes a shielding portion. The shielding portion shields the gap between the optical rangefinder and the groove wall of the notch, and / or the gap between the front lens and the main lens barrel.
[0014] In some embodiments, the shielding portion includes a receiving cavity, and the front end of the optical ranging device is positioned within the receiving cavity; the cavity wall of the receiving cavity has a first through hole and a second through hole, the first through hole allowing the emitted beam of the optical ranging device to pass through; the second through hole allowing the echo beam to pass through.
[0015] In some embodiments, the shielding portion makes a sealing contact with the front lens.
[0016] In some embodiments, the optical imaging rangefinder lens includes a retaining ring connected to the main lens barrel via a rotating structure, such that the front lens and the retaining cap are pressed between the retaining ring and the main lens barrel.
[0017] In some embodiments, the optical imaging rangefinder lens includes a sealing ring, the sealing ring, the pressure cap, and the pressure ring are sequentially and coaxially located in front of the front lens, and the sealing ring is pressed by the pressure ring to seal the gap between the front lens and the main lens barrel.
[0018] In some embodiments, the pressure ring is provided with an external thread, the front end of the main lens barrel is provided with an internal thread, and the rotating structure includes the internal thread and the external thread, with the internal thread connected to the external thread.
[0019] In some embodiments, the optical imaging rangefinder lens includes a pressure ring and a sealing ring, the sealing ring and the pressure ring being sequentially and coaxially located in front of the front lens; the pressure ring is connected to the main lens barrel via a rotating structure, such that the front lens and the sealing ring are pressed between the pressure ring and the main lens barrel, and the sealing ring seals the gap between the front lens and the main lens barrel.
[0020] In some embodiments, with reference to the usage state of the optical imaging rangefinder lens, the optical rangefinder is located directly above the main lens barrel.
[0021] In some embodiments, the optical ranging device is a laser ranging device.
[0022] Secondly, this application discloses an optical aiming device. The optical aiming device includes any of the aforementioned optical imaging rangefinder lenses.
[0023] In some embodiments, the optical aiming device is an infrared thermal imager or a visible light imaging device.
[0024] For the optical imaging rangefinder lens and the optical aiming device, since the optical rangefinder device extends at least partially into the main lens barrel and is directly fixedly connected to the interior of the main lens barrel, compared with some implementations where the optical rangefinder device is connected to the main lens barrel via an adapter bracket, it has at least the following advantages: a) No adapter bracket is required, saving the space occupied by the adapter bracket and helping to reduce the size of the optical imaging rangefinder lens; b) Since the optical rangefinder device extends at least partially into the main lens barrel and the adapter bracket is eliminated, on the one hand, it helps to reduce the distance between the optical axis of the optical rangefinder device and the imaging rangefinder lens. The optical axis of the component is spaced radially along the main lens barrel; on the other hand, it can also reduce the cumulative tolerance of the adapter bracket, or the structural strength of the adapter bracket is insufficient, which leads to an increase in the error between the aforementioned optical axes (such as spacing, parallelism, etc.). Therefore, the above two aspects are beneficial for aiming at the target; c) The optical rangefinder is directly fixed to the inside of the main lens barrel, eliminating the need for an adapter bracket, which helps to reduce the overall weight of the optical imaging rangefinder lens and make it lighter; d) The optical rangefinder extends at least partially into the main lens barrel, and the outline of the optical imaging rangefinder lens can be determined by the shape of the main lens barrel, resulting in a more harmonious appearance. Attached Figure Description
[0025] Figure 1 This is a perspective view of the optical imaging rangefinder lens of this application;
[0026] Figure 2 This is a front view of the optical imaging rangefinder lens of this application;
[0027] Figure 3 This is an exploded view of the optical imaging rangefinder lens of this application;
[0028] Figure 4 yes Figure 3 The front view of the main barrel of the optical imaging rangefinder lens shown;
[0029] Figure 5 This is a front view of the optical ranging device of this application located within the notch of the front lens;
[0030] Figure 6 This is a cross-sectional view of the optical imaging rangefinder lens of this application;
[0031] Figure 7 yes Figure 6 Enlarged view of section A;
[0032] Figure 8 This is a cross-sectional view of the optical imaging rangefinder lens of this application excluding the imaging components;
[0033] Figure 9 This is a front view of the optical ranging device of this application. Detailed Implementation
[0034] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.
[0035] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.
[0036] See Figure 1 , Figure 3 , Figures 6 to 8 This application discloses an optical imaging rangefinder lens. The optical imaging rangefinder lens includes a main lens barrel 1, an optical rangefinder device 2, and an imaging component 3. The imaging component 3 can be an infrared imaging component or a visible light imaging component, and is not limited thereto. The optical rangefinder device 2 emits a light beam, which hits a target and is reflected; the reflected beam is received, processed, and then used for range measurement; for example, it is a laser rangefinder device. The structure of the optical rangefinder device 2 is not limited; for example, see [reference needed]. Figure 9The optical ranging device 2 includes a housing 21, a light emitting component, and a light receiving component, etc. The housing 21 has a light emitting aperture 2191 through which light (such as laser light) emitted by the light emitting component passes, and a light receiving aperture 2192 through which the echo beam passes. The light receiving component receives the echo beam. The optical ranging device 2 may extend partially or completely into the main lens barrel 1. In either case, the optical ranging device 2 is directly and fixedly connected to the interior of the main lens barrel 1. This direct fixed connection means that the optical ranging device 2 is connected to the main lens barrel 1 without the aid of adapter brackets or other components. This fixed connection can be achieved through screws, clips, or other connection structures.
[0037] As described above, since the optical ranging device 2 at least partially extends into the main lens barrel 1 and is directly fixedly connected to the interior of the main lens barrel 1, compared with some embodiments where the optical ranging device 2 is connected to the main lens barrel 1 via an adapter bracket, it has at least the following advantages: a) No adapter bracket is required, saving the space occupied by the adapter bracket and facilitating a reduction in the size of the optical imaging ranging lens; b) The fact that the optical ranging device 2 at least partially extends into the main lens barrel 1 and eliminates the need for an adapter bracket, on the one hand, helps to reduce the radial distance between the optical axis L1 of the optical ranging device 2 and the optical axis L2 of the imaging component 3 along the main lens barrel 1 (e.g., ...). If the main lens barrel 1 is not cylindrical, the radial direction is perpendicular to the optical axis. On the other hand, it can also reduce the cumulative tolerance of the adapter bracket, or the structural strength of the adapter bracket is insufficient, which leads to an increase in the error between the aforementioned optical axes (such as spacing, parallelism, etc.). Therefore, the above two aspects are beneficial for aiming at the target; c) The optical rangefinder 2 is directly fixed to the inside of the main lens barrel 1, eliminating the need for the adapter bracket, which helps to reduce the overall weight of the optical imaging rangefinder lens and make it lighter; d) The optical rangefinder 2 extends at least partially into the main lens barrel 1, and the outline of the optical imaging rangefinder lens can be determined by the shape of the main lens barrel 1, resulting in a more harmonious appearance.
[0038] See Figure 1 and Figure 2 With a radial plane parallel to the main lens barrel 1 as the projection plane, the projection of the optical ranging device 2 is located within the projection of the inner surface of the main lens barrel 1. In this case, the projection of the inner surface of the main lens barrel 1 is usually circular, but is not limited to this.
[0039] As described above, since the projection of the optical ranging device 2 and the projection of the main lens barrel 1 satisfy the above relationship, the shape of the optical ranging device 2 will not affect the external shape of the main lens barrel 1. Therefore, the appearance of the optical imaging ranging lens is more harmonious and aesthetically pleasing.
[0040] See Figure 6 The optical imaging aiming device includes an imaging component 3. See also... Figure 9 and Figure 3The optical ranging device 2 includes a protrusion 211 in its circumferential direction. In this embodiment, the protrusion 211 is disposed on the housing 21 of the optical ranging device 2. The circumferential direction is not limited to opposite sides of the optical ranging device 2 (e.g., Figure 9 (Showing left and right sides). It can also be top and bottom, or any combination of left, right, top, and bottom. The protrusion 211 protrudes along a first direction, which is perpendicular to the optical axis of the imaging component 3. The protrusion 211 is attached to and fixed to the interior of the main lens barrel 1. For more details, see... Figure 4 The main lens barrel 1 includes a support surface 11. A protrusion 211 is attached to the support surface 11. The fixing device, such as the support surface 11 and the protrusion 211, each has a screw hole, and a screw passes through the screw hole to fix the protrusion 211 to the main lens barrel 1.
[0041] As described above, since the protrusion 211 protrudes in a first direction, which is perpendicular to the optical axis of the imaging component 3, and normally the protrusion 211 is as follows: Figure 9 In this way, the protrusion is perpendicular to the outer shell 21. This arrangement helps to improve the parallelism between the optical axis of the optical rangefinder 2 and the optical axis of the imaging component 3, which in turn helps to aim at the target. Furthermore, by having the protrusion 211 attached to the inside of the main lens barrel 1, compared with the method of using an adapter bracket, it is beneficial to reduce the influence of the strength of the adapter bracket itself on the stability of the optical axis of the optical rangefinder 2, improve the stability of the optical axis of the optical rangefinder 2 when the optical imaging rangefinder lens is subjected to impact force, and also help to aim at the target.
[0042] See Figures 1 to 3 and Figure 5 The optical imaging rangefinder lens includes a front lens 4, which is the first optical lens located at the front end of the main lens barrel 1. The front end of the main lens barrel 1 is the end of the main lens barrel 1 closest to the target. The front lens 4 can be used, for example, to collimate or focus light. The optical rangefinder 2 is assembled with the front lens 4 in a limiting manner.
[0043] As described above, since the front lens 4 is the first optical lens located at the front end of the main lens barrel 1, and the optical rangefinder 2 is fixedly connected to the interior of the main lens barrel 1, there is a certain transmission distance between the assembly point of the front lens 4 and the optical rangefinder 2 and the connection point between the optical rangefinder 2 and the main lens barrel 1 (such as the protrusion 211). This is equivalent to limiting the optical rangefinder 2 at two points along the optical axis L1. Therefore, this design helps to ensure that the optical rangefinder 2 is more stable, ultimately improving the accuracy of aiming at the target and making it more conducive to aiming at the target. Furthermore, since the optical rangefinder 2 is assembled with the front lens 4, and the front lens 4 is the first lens, the optical rangefinder 2 is relatively farther away from the imaging component 3. This is more conducive to reducing the impact of the heat from the optical rangefinder 2 on the imaging component 3, thereby ensuring good uniformity of the image.
[0044] The assembly of the optical ranging device 2 with the front lens 4 is not limited; for example, the edge of the front lens 4 includes a notch 41. See also Figure 5 The optical ranging device 2 is positioned within the notch 41. The optical ranging device 2 can be entirely located within the notch 41 or partially located within the notch 41.
[0045] As described above, by setting the notch 41 and positioning the optical ranging device 2 within the notch, on the one hand, the notch 41 has a limiting effect on the optical ranging device 2. Therefore, this design helps to ensure that the optical axis of the optical ranging device 2 is more stable. On the other hand, the optical ranging device 2 is closer to the optical axis L2, which helps to reduce the distance between the optical axis L1 of the optical ranging device 2 and the optical axis L2 of the imaging component 3, ultimately improving the accuracy of aiming at the target and making it more conducive to aiming at the target.
[0046] See Figure 3 and Figure 5 The housing 21 of the optical ranging device 2 includes a mounting portion 212 located within the notch 41, and the shape of the outline of the mounting portion 212 conforms to the shape of the notch 41. This conformity means that if the notch 41 is U-shaped, the mounting portion 212 is also U-shaped. If the notch 41 is arc-shaped and the mounting portion 212 is U-shaped, then the shape of the outline of the mounting portion 212 does not conform to the shape of the notch 41.
[0047] The front lens 4 is used for light to pass through and be transmitted to the imaging assembly 3 for final imaging. If the shape of the mounting part 212 does not conform to the shape of the notch 41, a support member needs to be provided in the space between the mounting part 212 and the notch 41. The support member is used to support the optical rangefinder 2. In this way, the space occupied is reduced accordingly, and the area of the front lens 4 used for light transmission is reduced. However, if this situation is considered from the perspective of the optical rangefinder 2, the conformal design reduces the obstruction of the light transmission port of the imaging assembly 3 by the optical rangefinder 2. The front lens 4 has a larger area for light to pass through. While ensuring the aforementioned beneficial effect of aiming at the target, it also helps the imaging assembly 3 to have a better imaging effect.
[0048] In some embodiments, an elastic element is provided between the housing 21 of the optical ranging device 2 and the groove wall of the notch 41. The elastic element may be made of an elastic material, and is not limited thereto.
[0049] Because the front lens 4 is fragile, the elastic element can buffer the impact force when the optical imaging rangefinder lens is subjected to impact force (such as impact force caused by vibration), which helps to reduce damage to the front lens 4.
[0050] In some embodiments, a seal is provided between the housing 21 of the optical ranging device 2 and the groove wall of the notch 41. The seal is, for example, formed by the curing of adhesive.
[0051] The sealing effect of the seal helps prevent dust and other contaminants from entering the space enclosed by the main lens barrel 1 and the front lens 4 from between the groove wall of the notch and the outer casing 21. In some cases, the seal and the elastic element are the same component, that is, one component has both sealing and elastic damping functions, such as some sealing rings or components formed by the curing of some adhesives.
[0052] See Figure 5 The distance between the center of the front lens 4 and the bottom wall of the notch 41 is r, and the radius of the front lens 4 is R, where r / R ≥ 0.3, for example, 0.3, 0.32, 0.35, 0.38, 0.4, 0.42 or 0.45, etc.
[0053] As set above, r / R≥0.3 ensures that the notch 41 limits the optical ranging device 2, which is beneficial for aiming at the target. On the other hand, the front lens 4 also has a larger area for light to pass through, resulting in better imaging effect.
[0054] See Figures 1 to 3 and Figure 7The optical imaging rangefinder lens includes a cover 5. The cover 5 is located at the front end of the main lens barrel 1. The cover 5 is not limited to being located at the front end of the main lens barrel 1 in the manner described in this application. The cover 5 includes a blocking portion. Figure 3 In this design, the blocking portion includes a ring-shaped first blocking portion 52 and a second blocking portion 53 disposed on the first blocking portion 52. However, the structure of the blocking portion is not limited to this; it is sufficient to achieve the blocking function. For example, in some embodiments, the second blocking portion 53 does not protrude from the first blocking portion 52, does not have a receiving cavity, and is flat. The blocking portion blocks the gap between the optical ranging device 2 and the groove wall of the notch 41, as well as the gap between the front lens 4 and the main lens barrel 1. Figure 2 and Figure 3 In this application, the second blocking part 53 blocks the gap between the optical ranging device 2 and the groove wall of the notch 41 (the gap is in Figure 2 (Indicated by dashed lines), the first blocking part 52 blocks the gap between the front lens 4 and the main lens barrel 1. In other embodiments, the blocking part blocks the gap between the optical rangefinder 2 and the groove wall of the notch 41. In still other embodiments, the blocking part blocks the gap between the front lens 4 and the main lens barrel 1. The blocking of the gap between the front lens 4 and the main lens barrel 1 can be direct or indirect, as described later. For example, a sealing ring 7 can be provided between the blocking part and the gap between the main lens barrel 1 and the front lens 4, thus indirectly blocking the gap.
[0055] As described above, by blocking the gap between the optical ranging device 2 and the groove wall of the notch 41, and / or the gap between the front lens 4 and the main lens barrel 1, the optical imaging ranging lens is more aesthetically pleasing.
[0056] See Figure 2 , Figure 7 and Figure 8 The shielding portion of the pressure cover 5 includes a receiving cavity 51 (the second shielding portion 53 includes the receiving cavity 51). The front end of the optical ranging device 2 is positioned within the receiving cavity 51, which can be understood as the front end of the optical ranging device 2 being enclosed by the cavity wall of the receiving cavity 51. The cavity wall of the receiving cavity 51 has a first through hole 511 and a second through hole 512. The first through hole 511 allows the emitted beam of the optical ranging device to pass through; the second through hole 512 allows the echo beam to pass through.
[0057] As described above, the pressure cap 5 is located at the front end of the main lens barrel 1, and the front end of the optical rangefinder 2 is positioned within the receiving cavity 51. Combined with the fact that the optical rangefinder 2 is directly fixed to the main lens barrel 1, the two ends of the optical rangefinder 2 are fixed, which is beneficial for the stability of the optical axis of the optical rangefinder 2, and thus, for aiming at the target. When the obstruction portion of the pressure cap 5 includes the receiving cavity 51, the front lens 4 may not have a notch or groove, or it may have a notch or groove, but the notch or groove does not serve the aforementioned function. When the obstruction portion of the pressure cap 5 includes the receiving cavity 51 and the front lens 4 includes the notch or groove 41 with the aforementioned function, the optical rangefinder 2 is supported and positioned in three places, which is more conducive to improving the stability of the optical axis, etc., and is beneficial for aiming at the target. Furthermore, the cavity wall of the receiving cavity 51 helps to block the gap between the optical rangefinder 2 and the notch or groove 41, making the optical imaging rangefinder lens more aesthetically pleasing.
[0058] In some embodiments, there is no seal between the shielding portion and the front lens 4. In other embodiments, the shielding portion and the front lens 4 are in sealed contact. For example, a sealed contact is achieved by curing with adhesive or by using a sealing ring.
[0059] As described above, the sealed contact between the shielding part and the front lens 4 is more effective at preventing dust and other contaminants from entering, thus avoiding the impact of dust and other contaminants on light transmission compared to no sealing.
[0060] See Figure 1 , Figure 3 , Figure 6 , Figure 7 and Figure 8 The optical imaging rangefinder lens includes a retaining ring 6. The retaining ring 6 is connected to the main lens barrel 1 via a rotating structure, so that the front lens 4 and the retaining cap 5 are pressed tightly between the retaining ring 6 and the main lens barrel 1. The rotating structure is not limited; for example, some suitable screw-on structures, or the retaining ring 6 having an external thread and the front end of the main lens barrel 1 having an internal thread. The rotating structure includes the internal thread and the external thread. The internal thread connects with the external thread. For more details, see [link to documentation]. Figure 4 The main lens barrel 1 includes a stepped surface 12, which is located in front of the bearing surface 11. The front lens 4 is placed on the stepped surface 12. After the sealing ring 7 and the pressure cap 5 are positioned according to the above-mentioned positional relationship, the pressure ring 6 is screwed on to connect the pressure ring 6 to the main lens barrel 1.
[0061] As described above, the main lens barrel 1 and the pressure ring 6 are connected by a rotating structure (such as a thread), which can convert the rotational motion of the pressure ring 6 into linear motion. Furthermore, the pressure ring 6 does not directly press on the front lens 4. Consequently, the above assembly relationship will not cause the front lens 4 to rotate, and thus will not cause the front lens 4 to rotate toward the optical rangefinder 2. When the optical imaging rangefinder lens is subjected to an impact force, it is beneficial to reduce the impact force on the front lens 4 and to avoid damage to the front lens 4. For example, if the elastic element between the front lens 4 and the optical rangefinder 2 is squeezed due to the rotation of the front lens 4, it cannot play a good role in vibration damping and cannot resist the impact force, resulting in damage to the front lens 4.
[0062] In some embodiments, the optical imaging rangefinder lens includes a sealing ring 7, the sealing ring 7, the pressure cap 5 and the pressure ring 6 are located sequentially and coaxially in front of the front lens 4, the sealing ring 7 is pressed by the pressure ring 6 to seal the gap between the front lens 4 and the main lens barrel 1.
[0063] As described above, the sealing ring 7 seals the gap between the front lens 4 and the main lens barrel 1. The direct contact between the sealing ring 7 and the lens 4 also reduces the risk of impact damage, which helps to prevent damage to the front lens 4. In addition, the sealing effect of the sealing ring 7, combined with the sealing effect of the sealing element provided between the optical rangefinder 2 and the groove wall of the notch 41, seals the space enclosed by the front lens 4 and the main lens barrel 1, which helps to prevent dust and other substances from entering the space.
[0064] In the above embodiments, when the pressure ring 6 is rotatably connected to the main lens barrel 1, the optical imaging rangefinder lens includes a pressure cap 5. It is understood that if obstruction or other functions are not required, the optical imaging rangefinder lens does not include the pressure cap 5. However, the pressure ring 6 and the main lens barrel 1 are still connected via a rotatable structure. This embodiment is specifically as follows: the optical imaging rangefinder lens includes a pressure ring 6 and a sealing ring 7. The sealing ring 7 and the pressure ring 6 are sequentially and coaxially located in front of the front lens 4. The pressure ring 6 is connected to the main lens barrel 1 via a rotatable structure, so that the front lens 4 and the sealing ring 7 are pressed tightly between the pressure ring 6 and the main lens barrel 1, and the sealing ring 7 seals the gap between the front lens 4 and the main lens barrel 1. This embodiment also prevents the front lens 4 from rotating and avoids direct contact between the pressure ring 6 and the front lens 4, thus possessing the beneficial effects of the aforementioned embodiments.
[0065] See Figure 7 and Figure 8The optical ranging device 2 includes a circuit board 22. This circuit board is at least used by the optical ranging device 2 to process ranging signals (it can also be understood as a circuit board that implements signal transmission or processing functions of the optical ranging device 2). In some cases, the circuit board 22 may also integrate power management functions, etc. Because the circuit board 22 processes ranging signals or implements signal transmission, it generates heat, and the heat generation is relatively large. Regardless of the configuration of the circuit board 22, a heat transfer medium (not shown) is included between the circuit board 22 and the inner surface of the front end. Thus, the heat from the circuit board 22 diffuses to the outside of the optical imaging ranging lens through the heat transfer medium and the front end.
[0066] As described above, the optical ranging device 2 is assembled at the front end. The heat from the circuit board 22 is transferred to the front end through a heat transfer medium and then diffuses from the front end to the outside of the optical imaging ranging lens. Before the light enters the optical imaging ranging lens from the front end and then enters the image sensor of the imaging component 3, there is a transmission distance. Therefore, the imaging component 3 is usually located behind the front end. This distance between the circuit board 22 and the imaging component 3 not only facilitates heat dissipation of the circuit board but also minimizes the impact of the heat from the circuit board on the imaging component. For infrared thermal imagers and visible light imaging devices, the lifespan of the imaging component is relatively long. Furthermore, for infrared thermal imagers, the heat from the circuit board 22 will not affect the imaging of the imaging component 3, resulting in better image uniformity when the imaging component 3 images.
[0067] In the above embodiments, from the perspective of heat dissipation only, the optical ranging device 2 can be located at any position in the circumference of the main lens barrel 1.
[0068] The heat transfer medium is not limited, as long as it can transfer heat from the circuit board 22 to the front end. For example, the heat transfer medium can be a heat-conducting component made of a thermally conductive material. The type of thermally conductive material is not limited. In some embodiments, there is a gap between the circuit board 22 and the inner surface, and the heat transfer medium is air located within the gap.
[0069] In some embodiments, the gap is no greater than 5 mm. Typically, the main lens barrel 1 is cylindrical, and the inner surface of the main lens barrel 1 is also arc-shaped. The circuit board 22 is flat. In this case, the gap is the maximum distance between the flat circuit board and the arc-shaped inner surface.
[0070] As described above, on the one hand, the gap is no more than 5mm. The smaller gap makes it easier for the heat of the circuit board 22 to dissipate to the front end, resulting in better heat dissipation. This helps to reduce the impact of the heat of the circuit board 22 on the imaging component 3, making the image uniformity better when the imaging component 3 is imaging. On the other hand, the smaller gap also helps to reduce the radial dimension of the main lens barrel 1, which in turn helps to make the optical imaging rangefinder lens smaller in size.
[0071] See Figure 6 The imaging component 3 is located behind the optical ranging device 2. Along the optical axis L2 of the imaging component 3, the distance between the imaging component and the optical ranging device is X (X can be referenced to the image sensor of the imaging component), X≥15mm, and / or X≤70mm, which includes three cases: 1) X≥15mm; 2) 15mm≤X≤70mm; 3) X≤70mm, but X can be smaller than 15mm, as long as the imaging of the imaging component 3 is not affected by the heat of the circuit board 22.
[0072] As described above, since X ≥ 15mm, the imaging component 3 is farther from the circuit board 22, which helps to reduce the impact of the heat from the circuit board 22 on the imaging component 3, resulting in better image uniformity when the imaging component 3 images. Conversely, X ≤ 70mm, while ensuring that the heat from the circuit board 22 does not affect the imaging component 3, allows for a shorter length of the optical imaging rangefinder lens along the optical axis L2, resulting in a more aesthetically pleasing appearance.
[0073] In some embodiments, the circuit board 22 is a main control board, which is used to process ranging signals to obtain distance information.
[0074] In this configuration, circuit board 22 is the main control board, which processes the ranging signal and generates a significant amount of heat. This heat is transferred to the front end via a heat transfer medium and then diffused to the outside of the optical imaging ranging lens, resulting in good heat dissipation. Compared to circuit board 22, which integrates other functional components (such as power management devices) in addition to the main control board, the main control board generates relatively less heat. Separating the heat-generating components of the optical ranging device (the main control board and other heat-generating components) also facilitates the rapid dissipation of heat, preventing localized high temperatures from affecting device performance.
[0075] See Figure 6 , Figure 7 and Figure 8 The optical ranging device 2 includes a power supply board 23. The power supply board 23 and the circuit board 22 are located on different sides of the optical ranging device. Different sides include adjacent sides, for example, with Figures 6 to 8 Taking the direction shown in the figure as an example, the circuit board 22 is located at the top and the power board 23 is located on the right; different sides also include opposite sides, for example, the circuit board 22 is located at the top and the power board 23 is located at the bottom.
[0076] As described above, the power board 23 and the circuit board 22 are distributed to reduce heat concentration. The optical imaging rangefinder lens has a good heat dissipation effect, which helps to reduce the impact of the heat from the circuit board 22 and the power board 23 on the imaging component 3. As a result, the uniformity of the image is better.
[0077] See Figure 6 , Figure 7 and Figure 8 The optical ranging device 2 includes a bottom and a top that are arranged opposite each other in a first direction, the first direction being a direction perpendicular to the optical axis L2 of the imaging component 3. Figures 6 to 8 The diagram shows the top of the circuit board 22 above the bottom. In some embodiments, the top can be below the bottom, for example, when the circuit board 22 and the power board 23 are placed on top of each other. Figure 6 In the indicated state, it is symmetrical with respect to the optical axis L1. The distance between the top and the optical axis L2 is greater than the distance between the bottom and the optical axis L2. The circuit board 22 is disposed at the top; the power board 23 is disposed at the bottom.
[0078] As described above, the power board 23 generates less heat, while the main control board generates more heat. Furthermore, the distance between the top and the optical axis L2 is greater than the distance between the bottom and the optical axis L2. The relationship between the main control board and the imaging component can be understood as the line connecting the two forming the hypotenuse of a right triangle. The greater distance between them helps prevent the heat from the main control board (the component with high heat generation) from affecting the lifespan of the imaging component 3. For infrared thermal imagers, this also contributes to the uniformity of the image formed by the imaging component 3. Moreover, the bottom is close to the optical path side of the imaging component 3, providing ample space for the placement of the power board 23.
[0079] See Figure 1 , Figure 2 , Figure 6 and Figure 8 With reference to the usage state of the optical imaging rangefinder lens, the optical rangefinder 2 is located directly above the main lens barrel 1.
[0080] As described above, the optical imaging rangefinder lens is typically mounted above external devices, such as firearms. The optical rangefinder 2 is mounted above the main lens barrel 1, which can increase the vertical distance between the optical rangefinder 2 and the external device, reduce stray light emitted by the optical rangefinder 2 (such as laser) from hitting the surface of the external device, and reduce the impact of stray light reflection on the rangefinder performance.
[0081] Secondly, this application discloses an optical aiming device. The optical aiming device includes any of the aforementioned optical imaging rangefinder lenses. The optical aiming device is an infrared thermal imager or a visible light imaging device, such as a visible light gun sight.
[0082] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. An optical imaging rangefinder lens, characterized in that, The optical imaging rangefinder lens includes a main lens barrel and an optical rangefinder; the optical rangefinder extends at least partially into the main lens barrel and is directly and fixedly connected to the interior of the main lens barrel; the optical imaging rangefinder lens includes a front lens, which is a first optical lens located at the front end of the main lens barrel; the optical rangefinder is assembled with the front lens in a limiting manner.
2. The optical imaging rangefinder lens according to claim 1, characterized in that, With a radial plane parallel to the main lens barrel as the projection plane, the projection of the optical ranging device is located within the projection of the inner surface of the main lens barrel; And / or, the optical imaging rangefinder lens includes an imaging component, the optical rangefinder includes a protrusion in the circumferential direction, the protrusion protrudes along a first direction, the first direction being a direction perpendicular to the optical axis of the imaging component; the protrusion is attached to and fixed to the interior of the main lens barrel.
3. The optical imaging rangefinder lens according to claim 1, characterized in that, The edge of the front lens includes a notch; the optical ranging device is positioned within the notch.
4. The optical imaging rangefinder lens according to claim 3, characterized in that, The optical imaging rangefinder lens includes at least one of the following features: a) The housing of the optical ranging device includes a mounting part, which is located within the notch, and the shape of the outline of the mounting part is similar to the shape of the notch. b) An elastic element and / or a sealing element are provided between the housing of the optical ranging device and the groove wall of the notch; c) The radius of the front lens is R, and the distance between the center of the front lens and the bottom wall of the notch is r, where r / R ≥ 0.
3.
5. The optical imaging rangefinder lens according to claim 3, characterized in that, The optical imaging rangefinder lens includes a cover located at the front end of the main lens barrel and includes a shielding portion; the shielding portion shields the gap between the optical rangefinder and the groove wall of the notch, and / or the gap between the front lens and the main lens barrel.
6. The optical imaging rangefinder lens according to claim 5, characterized in that, The shielding part includes a receiving cavity, and the front end of the optical ranging device is positioned within the receiving cavity; The cavity wall of the receiving cavity is provided with a first through hole and a second through hole. The first through hole allows the emitted beam of the optical ranging device to pass through; the second through hole allows the echo beam to pass through. And / or, the shielding portion makes a sealing contact with the front lens.
7. The optical imaging rangefinder lens according to claim 5, characterized in that, The optical imaging rangefinder lens includes a retaining ring, which is connected to the main lens barrel via a rotating structure, so that the front lens and the retaining cap are pressed between the retaining ring and the main lens barrel.
8. The optical imaging rangefinder lens according to claim 7, characterized in that, The optical imaging rangefinder lens includes a sealing ring, and the sealing ring, the pressure cap, and the pressure ring are located sequentially and coaxially in front of the front lens. The sealing ring is pressed by the pressure ring to seal the gap between the front lens and the main lens barrel. And / or, the pressure ring is provided with an external thread, the front end of the main lens barrel is provided with an internal thread, the rotating structure includes the internal thread and the external thread, and the internal thread is connected to the external thread.
9. The optical imaging rangefinder lens according to claim 3, characterized in that, The optical imaging rangefinder lens includes a pressure ring and a sealing ring, wherein the sealing ring and the pressure ring are located sequentially and coaxially in front of the front lens. The pressure ring is connected to the main lens barrel via a rotating structure, so that the front lens and the sealing ring are pressed between the pressure ring and the main lens barrel, and the sealing ring seals the gap between the front lens and the main lens barrel.
10. The optical imaging rangefinder lens according to claim 1, characterized in that, With reference to the usage state of the optical imaging rangefinder lens, the optical rangefinder is located directly above the main lens barrel; And / or, the optical ranging device is a laser ranging device.
11. An optical aiming device, characterized in that, The optical aiming device includes the optical imaging rangefinder lens as described in any one of claims 1 to 10.
12. The optical aiming device according to claim 11, characterized in that, The optical aiming device is an infrared thermal imager or a visible light imaging device.