A synchronous focusing and calibration device

Abstract

The application relates to a synchronous focusing and calibration device, which comprises a pair of objectives, a pair of imaging assemblies, a focusing transmission assembly and a calibration assembly. The objectives and the imaging assemblies are one-to-one corresponding, the imaging assemblies are located on the center lines of the objectives, and the imaging assemblies can slide along the center lines of the objectives. The focusing transmission assembly comprises a knob, a transmission element and a pair of connecting rods, the knob is connected with the transmission element, the connecting rods are arranged on the transmission element, the connecting rods are connected with the imaging assemblies, and the knob is used for driving the connecting rods to slide through the transmission element. The calibration assembly is used for driving the imaging assemblies to slide. In the application, the transmission element converts the rotation of the knob into the sliding of the connecting rods on the transmission element, a pair of connecting rods are arranged on the transmission element to drive two imaging assemblies to slide, synchronous focusing is realized, the calibration assembly is arranged to drive the imaging assemblies to slide to realize calibration, and the aiming precision is improved.

Description

Technical Field

[0001] This invention relates to the field of optics, and more particularly to a synchronous focusing and calibration device. Background Technology

[0002] With the iterative upgrades of modern civilian outdoor hunting products, traditional single-band observation and aiming modes are no longer sufficient to meet the needs of complex environments, leading to the emergence of multi-light image fusion observation and aiming equipment. However, different spectra exhibit significant differences in imaging characteristics: the low-light / visible light band offers high resolution and rich texture details, but is greatly affected by adverse weather conditions and depends on ambient light; while the long-wave infrared band can operate in all weather conditions and has the ability to penetrate smoke and dust, it suffers from inherent disadvantages such as low resolution and lack of texture details. In existing equipment equipped with two sets of objectives, such as in image fusion observation and aiming equipment, the thermal imaging and visible / low-light optical systems typically have independent focusing mechanisms, which cannot be synchronized. Furthermore, during the production and assembly process of the observation and aiming equipment, the distance between the imaging chip and the objective lens is prone to errors compared to the set value, resulting in inaccurate aiming during subsequent use. Summary of the Invention

[0003] (a) Technical problems to be solved This invention provides a synchronous focusing and calibration device, which aims to solve the problems in the prior art that two objective lenses cannot be synchronously focused and the sights are inaccurate.

[0004] (II) Technical Solution To address the aforementioned problems, the present invention provides a synchronous focusing and calibration device, which includes: a pair of objective lenses, a pair of imaging components, a focusing transmission component, and a calibration component. The objective lens and the imaging component are in one-to-one correspondence. The imaging component is located on the center line of the objective lens and can slide along the center line of the objective lens. The focusing transmission assembly includes a knob, a transmission element, and a pair of connecting rods. The knob is connected to the transmission element, and the connecting rods are disposed on the transmission element and connected to the imaging assembly. The knob is used to drive the connecting rods to slide through the transmission element. The calibration component is used to move the imaging component.

[0005] Preferably, the imaging assembly includes a first imaging sleeve and a second imaging sleeve, both of which are open at both ends, and the calibration assembly includes a calibration sleeve, both of which are open at both ends. The first imaging sleeve is sleeved on the second imaging sleeve, and the first imaging sleeve and the second imaging sleeve can slide relative to each other. The first imaging sleeve is connected to the connecting rod. A strip hole is provided on the side wall of the first imaging sleeve. An imaging chip is provided inside the second imaging sleeve. A drive post is protruding on the side wall of the second imaging sleeve, and the first end of the drive post passes through the strip hole. The calibration sleeve is fitted onto the first imaging sleeve, and the calibration sleeve and the first imaging sleeve are rotatable relative to each other. An arc-shaped calibration groove is provided on the side wall of the calibration sleeve, and the first end of the drive column is located in the arc-shaped calibration groove. The calibration sleeve can drive the drive column to move along the strip hole through the arc-shaped calibration groove.

[0006] Preferably, the second imaging sleeve is fitted onto the objective lens, the outer shell of the objective lens is provided with a sliding column, and the second imaging sleeve is provided with a sliding groove along the axial direction, with the sliding column located in the sliding groove.

[0007] Preferably, the first end of the first imaging sleeve is provided with an annular protrusion, the second end of the first imaging sleeve is provided with an annular retaining strip, and the calibration sleeve is located between the annular protrusion and the annular retaining strip.

[0008] Preferably, the synchronous focusing and calibration device further includes a housing, in which the objective lens, the imaging component, the focusing transmission component, and the calibration component are all disposed within the housing, and the knob is located outside the housing.

[0009] Preferably, the transmission element includes: a drive shaft and a drive sleeve; The drive shaft is located inside the drive sleeve and can rotate inside the drive sleeve. The first end of the drive shaft is fixedly connected to the knob. The drive sleeve is provided with a pair of guide grooves along the axial direction, and the drive shaft is provided with a pair of curved grooves, which correspond one-to-one with the guide grooves. One end of the connecting rod passes through the guide groove and extends into the curved groove. The connecting rod is used to slide along the guide groove to drive the imaging assembly to be positioned on the imaging surface of the objective lens.

[0010] Preferably, the curved groove is spiral in shape.

[0011] Preferably, the transmission element includes: a focusing shaft and a focusing plate; The focusing shaft is mounted on the housing, and one end of the focusing shaft is fixedly connected to the knob. A focusing plate is fixedly provided at the other end of the focusing shaft, and an arc-shaped focusing groove corresponding to the objective lens is provided on the focusing plate. One end of the connecting rod is slidably installed in the arc-shaped focusing groove, and the other end of the connecting rod is connected to the imaging component.

[0012] Preferably, the focusing shaft is provided with a pair of focusing plates, and each focusing plate is provided with an arc-shaped focusing groove.

[0013] (III) Beneficial Effects In this invention, the transmission element converts the rotation of the knob into the sliding of the connecting rod on the transmission element. A pair of connecting rods are provided on the transmission element to drive the two imaging components to slide, achieving synchronous focusing. A calibration component is provided to drive the imaging components to slide for calibration, improving aiming accuracy. Attached Figure Description

[0014] Figure 1 This is an exploded view of the synchronous focusing and calibration device of the present invention in Embodiment 1; Figure 2 This is an exploded view of the synchronous focusing and calibration device of the present invention from another perspective in Embodiment 1; Figure 3 This is a schematic diagram of the synchronous focusing and calibration device of the present invention in Embodiment 1; Figure 4 This is a schematic diagram of the synchronous focusing and calibration device of the present invention in Embodiment 2; Figure 5 This is an exploded view of the synchronous focusing and calibration device of the present invention in Embodiment 2; Figure 6 This is a partial cross-sectional view of the synchronous focusing and calibration device of the present invention in Embodiment 2.

[0015] [Explanation of Labels in the Attached Image] 1: Objective lens; 11: Sliding column; 2: Imaging assembly; 21: First imaging sleeve; 211: Strip-shaped aperture; 212: Annular protrusion; 213: Annular retaining strip; 22: Second imaging sleeve; 221: Drive column; 222: Sliding groove; 3: Focusing transmission assembly; 31: Knob; 32: Transmission element; 321: Drive shaft; 322: Drive sleeve; 323: Guide groove; 324: Curved groove; 325: Focusing shaft; 326: Focusing plate; 327: Arc-shaped focusing groove; 33: Connecting rod; 4: Calibration assembly; 41: Calibration sleeve; 42: Arc-shaped calibration groove; 5: Housing. Detailed Implementation

[0016] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0018] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0019] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] This invention provides a synchronous focusing and calibration device, comprising: a pair of objective lenses 1, a pair of imaging components 2, a focusing transmission assembly 3, and a calibration assembly 4. The objective lenses 1 and imaging components 2 correspond one-to-one, with the imaging components 2 located on the centerline of the objective lenses 1 and capable of sliding along the centerline. The focusing transmission assembly 3 includes a knob 31, a transmission element 32, and a pair of connecting rods 33. The knob 31 is connected to the transmission element 32, and the connecting rods 33 are mounted on the transmission element 32 and connected to the imaging components 2. The knob 31 drives the connecting rods 33 to slide via the transmission element 32. The calibration assembly 4 drives the imaging components 2 to slide.

[0021] In the technical solution of this invention, the transmission element 32 converts the rotation of the knob 31 into the sliding of the connecting rod 33 on the transmission element 32. A pair of connecting rods 33 are provided on the transmission element 32 to drive the two imaging components 2 to slide, thereby achieving synchronous focusing. The sliding position of the connecting rod 33 on the transmission element 32 usually has two extreme positions, which correspond to the aiming device aiming at the nearest and farthest objects (the nearest and farthest distances are determined by the objective lens 1 itself). At this time, the imaging component 2 is located on the imaging plane of the objective lens 1. Since the position of the imaging component 2 may be incorrect during the production and assembly process of the aiming device, this application also provides a calibration component 4 to drive the imaging component 2 to slide and achieve calibration, thereby improving aiming accuracy.

[0022] Furthermore, the imaging assembly 2 includes a first imaging sleeve 21 and a second imaging sleeve 22, both of which are open at both ends, and the calibration assembly 4 includes a calibration sleeve 41, both of which are open at both ends. The first imaging sleeve 21 is sleeved on the second imaging sleeve 22, and the first imaging sleeve 21 and the second imaging sleeve 22 can slide relative to each other. The first imaging sleeve 21 is connected to the connecting rod 33. A strip-shaped hole 211 is provided on the side wall of the first imaging sleeve 21. An imaging chip is provided inside the second imaging sleeve 22, and a driving post 221 protrudes from the side wall of the second imaging sleeve 22. The first end of the driving post 221 passes through the strip-shaped hole 211. The calibration sleeve 41 is fitted onto the first imaging sleeve 21. The calibration sleeve 41 and the first imaging sleeve 21 can rotate relative to each other, but cannot slide relative to each other. An arc-shaped calibration groove 42 is provided on the side wall of the calibration sleeve 41. The first end of the drive column 221 is located in the arc-shaped calibration groove 42. The width of the arc-shaped calibration groove 42 is approximately equal to the diameter of the drive column 221. The calibration sleeve 41 can drive the drive column 221 to move along the strip hole 211 through the arc-shaped calibration groove 42.

[0023] During focusing, rotating knob 31 causes connecting rod 33 to slide the first imaging sleeve 21. The first imaging sleeve 21 then drives calibration sleeve 41 to slide along its own axis. Calibration sleeve 41 drives drive column 221 to slide through arc-shaped calibration groove 42. At this time, the second imaging sleeve 22 moves the imaging chip onto the imaging surface of objective lens 1, achieving focusing. During calibration, knob 31 is first rotated so that connecting rod 33 moves to its limit position on transmission element 32. Then, calibration sleeve 41 is rotated, and drive column 221 moves along strip hole 211 under the drive of side wall of arc-shaped calibration groove 42, achieving fine adjustment of the position of second imaging sleeve 22 and realizing calibration.

[0024] Furthermore, the second imaging sleeve 22 is fitted onto the objective lens 1. The outer shell 5 of the objective lens 1 is provided with a sliding post 11, and the second imaging sleeve 22 is provided with a sliding groove 222 along the axial direction, with the sliding post 11 located within the sliding groove 222. The length direction of the sliding groove 222 is consistent with the centerline direction of the second imaging sleeve 22.

[0025] In the above scheme, the cooperation between the sliding groove 222 and the sliding column 11 guides the sliding of the second imaging sleeve 22, so that the second imaging sleeve 22 can only slide along its own axis, that is, the imaging chip is always on the center line of the objective lens 1.

[0026] In a preferred embodiment, the first imaging sleeve 21 has an annular protrusion 212 protruding from its first end, and an annular retaining strip 213 at its second end. The calibration sleeve 41 is located between the annular protrusion 212 and the annular retaining strip 213. The cooperation of the annular protrusion 212 and the annular retaining strip 213 restricts the sliding of the calibration sleeve 41 on the first imaging sleeve 21, ensuring that the calibration sleeve 41 can only rotate relative to the first imaging sleeve 21.

[0027] In addition, the synchronous focusing and calibration device also includes a housing 5, in which the objective lens 1, imaging assembly 2, focusing transmission assembly 3, and calibration assembly 4 are all housed, while the knob 31 is located outside the housing 5. Specifically, one end of the objective lens 1 is located outside the housing 5, and the knob 31 is rotatably mounted on the side wall of the housing 5.

[0028] In Example 1: The transmission element 32 includes a drive shaft 321 and a drive sleeve 322. The drive shaft 321 is located inside the drive sleeve 322 and can rotate within the drive sleeve 322. The first end of the drive shaft 321 is fixedly connected to the knob 31. The drive sleeve 322 is provided with a pair of guide grooves 323 along the axial direction, and the drive shaft 321 is provided with a pair of curved grooves 324, which correspond one-to-one with the guide grooves 323. One end of the connecting rod 33 passes through the guide groove 323 and extends into the curved groove 324. The connecting rod 33 is used to slide along the guide groove 323 to drive the imaging assembly 2 to be positioned on the imaging surface of the objective lens 1.

[0029] The knob 31 drives the drive shaft 321 to rotate relative to the drive sleeve 322. Under the combined action of the curved groove 324 and the guide groove 323, the connecting rod 33 drives the imaging component 2 to slide along the length direction of the guide groove 323. The two curved grooves 324 on the drive shaft 321 drive the two connecting rods 33 to slide, moving the two imaging components 2 to the imaging surface of the two objective lenses 1, thereby achieving the purpose of synchronous focusing of the two objective lenses 1.

[0030] The curved groove 324 is spiral in shape. During the rotation of the drive shaft 321, the curved groove 324 moves in two directions relative to the guide groove 323. The first direction is along the axial direction of the drive shaft 321, and the second direction is tangential to the surface of the drive shaft 321. The connecting rod 33 tends to move with the curved groove 324. The second direction of movement of the connecting rod 33 is blocked by the groove wall of the guide groove 323 and converted into the first direction of movement. Therefore, the connecting rod 33 can carry the imaging component 2 to move along the axial direction of the drive shaft 321.

[0031] Furthermore, the two objective lenses 1 have different focal lengths, and the two curved grooves 324 have different shapes. Because the two curved grooves 324 on the drive shaft 321 have different shapes, the sliding distances of the two connecting rods 33 are different when the rotation angle of the drive shaft 321 is fixed. This moves the two imaging components 2 to the imaging surfaces of the two different objective lenses 1, achieving the purpose of focusing two different objective lenses 1 simultaneously with one drive shaft 321.

[0032] In Example 2: The transmission element 32 includes a focusing shaft 325 and a focusing plate 326. The focusing shaft 325 is rotatably mounted on the housing 5, and one end of the focusing shaft 325 is fixedly connected to the knob 31. The other end of the focusing shaft 325 is fixedly provided with a focusing plate, and the focusing plate 326 is provided with an arc-shaped focusing groove 327 corresponding to the objective lens 1. One end of the connecting rod 33 is slidably mounted in the arc-shaped focusing groove 327, and the other end of the connecting rod 33 is connected to the imaging assembly 2. In the technical solution of this application, by providing an arc-shaped focusing groove 327 on the focusing plate 326, when the knob 31 drives the focusing plate 326 to rotate through the focusing shaft 325, the focusing plate 326 drives the imaging assembly 2 to slide through the cooperation of the arc-shaped focusing groove 327 and the connecting rod 33. Specifically, the connecting rod 33 drives the second imaging sleeve 22 to slide along the slide groove 222.

[0033] Specifically, a pair of focusing plates 326 are provided on the focusing shaft 325, and each focusing plate 326 is provided with an arc-shaped focusing groove 327. Similarly, in this embodiment, the focal lengths of the two objective lenses 1 are different, and the shapes of the two arc-shaped focusing grooves 327 are different. Because the two arc-shaped focusing grooves 327 are different, when the rotation angle of the focusing shaft 325 is fixed, the sliding distances of the two connecting rods 33 are different, moving the two imaging components 2 to the imaging surfaces of the two different objective lenses 1, thereby achieving the purpose of focusing two different objective lenses 1 simultaneously with one drive shaft 321.

[0034] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. A synchronous focusing and calibration device, characterized in that, The synchronous focusing and calibration device includes: a pair of objective lenses (1), a pair of imaging components (2), a focusing transmission component (3), and a calibration component (4). The objective lens (1) and the imaging component (2) correspond one-to-one. The imaging component (2) is located on the center line of the objective lens (1) and can slide along the center line of the objective lens (1). The focusing transmission assembly (3) includes a knob (31), a transmission element (32), and a pair of connecting rods. The knob (31) is connected to the transmission element (32), the connecting rods are disposed on the transmission element (32), and the connecting rods (33) are connected to the imaging assembly (2). The knob (31) is used to drive the connecting rods (33) to slide through the transmission element (32). The calibration component (4) is used to drive the imaging component (2) to slide.

2. The synchronous focusing and calibration device as described in claim 1, characterized in that, The imaging component (2) includes a first imaging sleeve (21) and a second imaging sleeve (22) with both ends open, and the calibration component (4) includes a calibration sleeve (41) with both ends open. The first imaging sleeve (21) is sleeved on the second imaging sleeve (22), and the first imaging sleeve (21) and the second imaging sleeve (22) can slide relative to each other. The first imaging sleeve (21) is connected to the connecting rod (33). A strip hole (211) is provided on the side wall of the first imaging sleeve (21). An imaging chip is provided inside the second imaging sleeve (22). A driving post (221) is protruding on the side wall of the second imaging sleeve (22), and the first end of the driving post (221) passes through the strip hole (211). The calibration sleeve (41) is fitted on the first imaging sleeve (21), and the calibration sleeve (41) and the first imaging sleeve (21) can rotate relative to each other. An arc-shaped calibration groove (42) is provided on the side wall of the calibration sleeve (41), and the first end of the drive column (221) is located in the arc-shaped calibration groove (42). The calibration sleeve (41) can drive the drive column (221) to move along the strip hole (211) through the arc-shaped calibration groove (42).

3. The synchronous focusing and calibration device as described in claim 2, characterized in that, The second imaging sleeve (22) is fitted onto the objective lens (1). A sliding column (11) is provided on the outer shell (5) of the objective lens (1). A sliding groove (222) is provided in the second imaging sleeve (22) along the axial direction. The sliding column (11) is located in the sliding groove (222).

4. The synchronous focusing and calibration device as described in claim 2, characterized in that, The first imaging sleeve (21) has an annular protrusion (212) at its first end and an annular retaining strip (213) at its second end. The calibration sleeve (41) is located between the annular protrusion (212) and the annular retaining strip (213).

5. The synchronous focusing and calibration device as described in any one of claims 1-3, characterized in that, The synchronous focusing and calibration device also includes a housing (5), the objective lens (1), the imaging component (2), the focusing transmission component (3) and the calibration component (4) are all disposed inside the housing (5), and the knob (31) is located outside the housing (5).

6. The synchronous focusing and calibration device as described in claim 5, characterized in that, The transmission element (32) includes: a drive shaft (321) and a drive sleeve (322); The drive shaft (321) is located inside the drive sleeve (322) and can rotate inside the drive sleeve (322). The first end of the drive shaft (321) is fixedly connected to the knob (31). The drive sleeve (322) is provided with a pair of guide grooves (323) along the axial direction, and the drive shaft (321) is provided with a pair of curved grooves (324). The curved grooves (324) correspond one-to-one with the guide grooves (323). One end of the connecting rod passes through the guide groove (323) and extends into the curved groove (324). The connecting rod is used to slide along the guide groove (323) to drive the imaging component (2) to be located on the imaging surface of the objective lens (1).

7. The synchronous focusing and calibration device as described in claim 6, characterized in that, The curved groove (324) is spiral in shape.

8. The synchronous focusing and calibration device as described in claim 5, characterized in that, The transmission element (32) includes: a focusing shaft (325) and a focusing plate (326); The focusing shaft (325) is rotated and mounted on the housing (5), and one end of the focusing shaft (325) is fixedly connected to the knob (31). A focusing plate (326) is fixedly provided at the other end of the focusing shaft (325), and an arc-shaped focusing groove (327) corresponding to the objective lens (1) is provided on the focusing plate (326). One end of the connecting rod (33) is slidably installed in the arc-shaped focusing groove (327), and the other end of the connecting rod is connected to the imaging component (2).

9. The synchronous focusing and calibration device as described in claim 8, characterized in that, The focusing shaft (325) is provided with a pair of focusing plates (326), and each focusing plate (326) is provided with an arc-shaped focusing groove (327).

Images