Lens inclination adjusting structure and camera

Abstract

The utility model discloses a lens inclination adjusting structure and a camera, the structure is composed of a fixed cylinder, an inclination adjusting cylinder, a fastening nail and an adjusting nail, one end of the fixed cylinder is connected with a light emitting end of a lens, the other end of the fixed cylinder is provided with a first annular end face, and a plurality of first through holes are distributed on the first annular end face; one end of the inclined adjusting cylinder is fixed at the light inlet end of the camera, and the other end is provided with a second annular end face, and second through holes in the second annular end face are in one-to-one correspondence with projection positions of the first through holes. When the second through hole is a threaded hole, the first annular end face is provided with a threaded through hole, and the threaded nail abuts against the second annular end face through the first annular end face. Or when the first through hole is a threaded hole, the second annular end face is provided with a threaded through hole, and the threaded nail abuts against the first annular end face through the second annular end face. The relative inclination angle of the two annular end faces can be accurately controlled through the screwing depth difference of the threaded nails, the inclination deviation between an object plane and an image plane is effectively eliminated, and the full-image imaging definition is ensured.

Description

Technical Field

[0001] This utility model relates to the field of camera technology, such as cameras with telecentric lenses, and more particularly to a lens tilt adjustment structure and a camera. Background Technology

[0002] Typically, the light-emitting end of a lens is fixed to the light-inlet end of a camera, while the camera's imaging chip is mounted behind the light-inlet end, allowing light to enter the camera's chip from the lens. Industrial camera chips and their mounting surfaces are not perfectly parallel, resulting in a certain height difference. When using a low-magnification telecentric lens with this camera, the low magnification and the resulting height difference (image plane tilt) cause the object plane to tilt as well, leading to inconsistent image sharpness and affecting measurement accuracy. For example, with a 0.077X telecentric lens, a height difference of 0.02mm can result in an image plane difference of 3-4mm. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a lens tilt adjustment structure and a camera that can realize dynamic tilt compensation between the camera mounting surface and the lens, and effectively eliminate image plane tilt caused by height difference.

[0004] To solve the above-mentioned technical problems, the first aspect of this utility model discloses a lens tilt adjustment structure for a camera with a lens mounted, including a fixing cylinder, a tilt adjustment cylinder, a fastening pin, and an adjusting pin; the hollow portions of the fixing cylinder and the tilt adjustment cylinder are channels for light intake; the fastening pin and the adjusting pin are both threaded pins;

[0005] One end of the fixed cylinder is connected to the light-emitting end of the lens, and the other end of the fixed cylinder has a first annular end face with a plurality of evenly distributed first through holes. One end of the tilt adjustment cylinder has a second annular end face with a plurality of evenly distributed second through holes. The other end of the tilt adjustment cylinder is fixed to the light-inlet end of the camera. The projection positions of the second through holes on the first annular end face correspond one-to-one with the positions of the first through holes.

[0006] Wherein, the second through hole is a threaded hole, and the first annular end face is also provided with a plurality of third threaded through holes spaced apart from the first through hole. The fastening pin passes through the first through hole and is threadedly connected to the second through hole. The external thread of the adjusting pin is threadedly connected to the third threaded through hole and abuts against the outer wall surface of the second annular end face.

[0007] Alternatively, the first through hole is a threaded hole, and the second annular end face is also provided with a plurality of third threaded through holes spaced apart from the second through hole. The fastening pin passes through the second through hole and is threadedly connected to the first through hole. The external thread of the adjusting pin is threadedly connected to the third threaded through hole and abuts against the outer wall surface of the first annular end face.

[0008] As an optional implementation, the number of the first through holes is at least three.

[0009] As another optional implementation, the number of the third threaded through holes is at least three.

[0010] As another alternative implementation, the number of the second through holes is at least three.

[0011] As another optional implementation, when the second through hole is a threaded hole, the first through hole is a countersunk hole; or, when the first through hole is a threaded hole, the second through hole is a countersunk hole.

[0012] As another optional implementation, the inner wall of the third threaded through hole is provided with a lubricating layer.

[0013] As another optional implementation, at least one weight-reducing hole is provided on the first annular end face and / or the second annular end face.

[0014] The second aspect of this utility model discloses a camera, which includes the lens and lens tilt adjustment structure described in the first aspect of this utility model.

[0015] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0016] This utility model embodiment achieves dynamic tilt compensation between the camera mounting end face and the lens through an adjustable tilt structure (the cooperation of fastening pins and adjusting pins), effectively eliminating image plane tilt caused by height difference and ensuring consistent image clarity across the entire screen, especially suitable for telecentric lenses; the double-ring end face design (first ring end face and second ring end face) combined with through hole / threaded hole distribution provides multi-angle adjustment freedom, and the abutment design of the adjusting pin and the threaded hole's outer wall surface can precisely control the tilt angle; the symmetrical structural design (two configuration options: the second through hole or the first through hole is a threaded hole) adapts to different installation scenarios and has strong compatibility. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a lens tilt adjustment structure disclosed in an embodiment of the present utility model;

[0019] Figure 2 This is another schematic diagram of a lens tilt adjustment structure disclosed in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of another lens tilt adjustment structure disclosed in an embodiment of the present utility model;

[0021] Figure 4 This is another schematic diagram of a lens tilt adjustment structure disclosed in another embodiment of the present utility model. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] See Figures 1-4 This utility model discloses a lens tilt adjustment structure for a camera (not shown in the accompanying drawings) with a lens 1 mounted thereon. The structure includes a fixing cylinder 2, a tilt adjustment cylinder 3, a fastening pin (not shown in the accompanying drawings), and an adjusting pin (not shown in the accompanying drawings). The hollow portions of the fixing cylinder 2 and the tilt adjustment cylinder 3 serve as channels for light entry. Both the fastening pin and the adjusting pin are threaded pins.

[0025] One end of the fixed cylinder 2 is connected to the light-emitting end of the lens 1, and the other end of the fixed cylinder 2 has a first annular end face 21, on which a plurality of evenly distributed first through holes 211 are provided; one end of the tilt adjustment cylinder 3 has a second annular end face 31, on which a plurality of evenly distributed second through holes 311 are provided; the other end of the tilt adjustment cylinder 3 is fixed to the light-inlet end of the camera (not shown in the figure); the projection position of the second through hole 311 on the first annular end face 21 corresponds one-to-one with the position of the first through hole 211.

[0026] Among them, see Figures 1-2The second through hole 311 is a threaded hole, and the first annular end face 21 is also provided with a plurality of third threaded through holes 4 spaced apart from the first through hole 211. The fastening pin passes through the first through hole 211 and is threadedly connected to the second through hole 311. The external thread of the adjusting pin is threadedly connected to the third threaded through hole 4 and abuts against the outer wall surface of the second annular end face 31. This configuration allows for locking on the first annular end face 21 by fastening pins, and adjusting the inclination of the first annular end face 21 by adjusting the different extension lengths of the adjusting pins.

[0027] Or see Figures 3-4 The first through hole 211 is a threaded hole, and the second annular end face 31 is also provided with a plurality of third threaded through holes 4 spaced apart from the second through hole 311. The fastening pin passes through the second through hole 311 and is threadedly connected to the first through hole 211. The external thread of the adjusting pin is threadedly connected to the third threaded through hole 4 and abuts against the outer wall surface of the first annular end face 21. This configuration allows for locking on the second annular end face 31 by fastening pins, and adjusting the inclination of the first annular end face 21 by adjusting the extension length of the adjusting pins.

[0028] In this embodiment, the length of the adjusting pin is at least longer than the length of the third threaded through hole 4.

[0029] This utility model embodiment achieves dynamic tilt compensation between the camera mounting end face and lens 1 through an adjustable tilt structure (the cooperation of fastening pins and adjusting pins), effectively eliminating image plane tilt caused by height difference and ensuring consistent image clarity across the entire screen, especially suitable for telecentric lenses 1; the double-ring end face design (first ring end face 21 and second ring end face 31) combined with through hole / threaded hole distribution provides multi-angle adjustment freedom, and the abutment design of the adjusting pin and the threaded hole on the outer wall can precisely control the tilt angle; the symmetrical structure design (two configuration options: the second through hole 311 or the first through hole 211 is a threaded hole) adapts to different installation scenarios and has strong compatibility.

[0030] In an optional embodiment, the number of the first through holes 211 is at least three. The at least three first through holes 211 are evenly distributed to form a triangular or polygonal mechanical support structure, which enhances the connection stability between the fixed cylinder 2 and the tilting adjustment cylinder 3 and prevents structural displacement caused by uneven force during adjustment.

[0031] In another optional embodiment, the number of the third threaded through holes is at least three. The at least three third threaded through holes 4 cooperate with the adjusting pins to provide multi-point synchronous adjustment capability, ensuring that the tilt angle of the tilting adjustment cylinder 3 changes uniformly and avoiding localized stress concentration problems caused by single-point adjustment.

[0032] In another optional embodiment, the number of the second through holes 311 is at least three. The at least three second through holes 311 cooperate with fastening screws to form a redundant locking mechanism, further enhancing structural rigidity through multi-point fixing after adjustment, making it suitable for high-vibration or high-precision measurement environments.

[0033] In another optional embodiment, when the second through hole 311 is a threaded hole, the first through hole 211 is a countersunk hole; or, when the first through hole 211 is a threaded hole, the second through hole 311 is a countersunk hole. The countersunk hole design (either the first through hole 211 or the second through hole 311 is a countersunk hole) allows the head of the fastener to be embedded in the hole, avoiding interference with the optical path or installation interference caused by exposed structures, while also improving the flatness of the appearance.

[0034] In another optional embodiment, the inner wall of the third threaded through hole 4 is provided with a lubricating layer. The lubricating layer (such as a Teflon coating) on ​​the inner wall of the third threaded through hole 4 reduces the frictional resistance when the adjusting pin is turned, improves the smoothness of the adjustment, reduces thread wear, and extends service life.

[0035] In another optional embodiment, at least one weight-reducing hole is provided on the first annular end face 21 and / or the second annular end face 31. The weight-reducing hole design reduces the overall weight of the annular end face while ensuring structural strength, avoiding a decrease in tilt adjustment sensitivity due to its own weight, which is particularly suitable for portable or high-speed mobile camera devices.

[0036] Example 2

[0037] This utility model discloses a camera, which includes a lens and a lens tilt adjustment structure as described in Embodiment 1. The lens tilt adjustment structure improves the imaging quality and detection accuracy in industrial measurement scenarios.

[0038] The contents disclosed in this utility model embodiment are merely preferred embodiments of this utility model and are only used to illustrate the technical solutions of this utility model, not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A lens tilt adjustment structure for a camera in which a lens is mounted, characterized by comprising: It includes a fixed cylinder, an inclined adjustment cylinder, fastening pins, and adjusting pins; the hollow portions of the fixed cylinder and the inclined adjustment cylinder serve as channels for light to enter; the fastening pins and the adjusting pins are all threaded pins; One end of the fixed cylinder is connected to the light-emitting end of the lens, and the other end of the fixed cylinder has a first annular end face with a plurality of evenly distributed first through holes. One end of the tilt adjustment cylinder has a second annular end face with a plurality of evenly distributed second through holes. The other end of the tilt adjustment cylinder is fixed to the light-inlet end of the camera. The projection positions of the second through holes on the first annular end face correspond one-to-one with the positions of the first through holes. Wherein, the second through hole is a threaded hole, and the first annular end face is also provided with a plurality of third threaded through holes spaced apart from the first through hole. The fastening pin passes through the first through hole and is threadedly connected to the second through hole. The external thread of the adjusting pin is threadedly connected to the third threaded through hole and abuts against the outer wall surface of the second annular end face. Alternatively, the first through hole is a threaded hole, and the second annular end face is also provided with a plurality of third threaded through holes spaced apart from the second through hole. The fastening pin passes through the second through hole and is threadedly connected to the first through hole. The external thread of the adjusting pin is threadedly connected to the third threaded through hole and abuts against the outer wall surface of the first annular end face.

2. The lens tilt adjustment structure according to claim 1, characterized by, The number of the first through holes is at least three.

3. The lens tilt adjustment structure according to claim 1, characterized by, The number of the third threaded through holes is at least three.

4. The lens tilt adjustment structure according to claim 1, characterized in that, The number of the second through holes is at least three.

5. The lens tilt adjustment structure according to claim 1, characterized by, When the second through hole is a threaded hole, the first through hole is a countersunk hole; or, when the first through hole is a threaded hole, the second through hole is a countersunk hole.

6. The lens tilt adjustment structure according to claim 1, characterized by, The inner wall of the third threaded through hole is provided with a lubricating layer.

7. The lens tilt adjustment structure according to claim 1, characterized by, At least one weight-reducing hole is provided on the first annular end face and / or the second annular end face.

8. A camera characterized by, It includes the lens and lens tilt adjustment structure as described in any one of claims 1-7.

Images