Achromatic field lens

Abstract

The utility model relates to the technical field of laser imaging, in particular to an achromatic field lens, which comprises a connecting sleeve which is of an annular structure with an L-shaped cross section, and an internal thread is arranged on the inner side surface of the connecting sleeve; the annular sleeve is installed on the right side of the connecting sleeve, the annular sleeve is of a cylindrical hollow structure, and the annular sleeve and the connecting sleeve are coaxially arranged; the diaphragm plate is mounted in the middle of the connecting sleeve, and a diaphragm hole is formed in the middle of the diaphragm plate; the mounting assembly is detachably mounted in the annular sleeve, and lenses with adjustable intervals are uniformly mounted in the mounting assembly; according to the utility model, the lenses can be synchronously adjusted along with the slide block II, so that the distance between the lenses can be accurately adjusted, clear imaging of a CCD (Charge Coupled Device) in a view field range is ensured, and the requirement of visual positioning laser processing is met.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser imaging, in particular to an achromatic field lens. BACKGROUND

[0002] The achromatic field lens is an optical element, which is mainly used for correcting chromatic aberration between laser wavelength (such as 355 nm) and visual wavelength (such as common 633 nm). Its main function is to make laser and visual imaging light coaxial and focus to the same point, so that the focal planes of the two are coincident. This feature helps to realize clear imaging of CCD in the field of view and meet the needs of visual positioning laser processing.

[0003] The Chinese patent with the publication number CN217034408U and the name "Achromatic imaging lens for scanning field lens visual positioning" discloses an achromatic imaging lens for coaxial visual positioning, which can significantly improve the coaxial visual imaging clarity and thus improve the positioning accuracy. The working wavelength of the lens is visible light. The achromatic imaging lens can correct aberration with the field lens, has small astigmatism distortion and clear imaging, can meet the visual positioning needs in high-precision processing applications, and has good lens tolerance and low cost, meeting the batch demand.

[0004] The above-mentioned prior art can also improve the visual imaging clarity when in use, but the distance between the lenses is fixed, which cannot be adjusted, and the lenses cannot be accurately clamped and fixed, which may cause the lenses to shake and affect the accuracy of visual positioning. Therefore, there is still room for improvement based on the existing achromatic field lens. Practical new type content

[0005] In order to accurately correct the laser beam and ensure clear imaging of CCD in the field of view and meet the needs of visual positioning laser processing, the application provides an achromatic field lens.

[0006] The achromatic field lens provided by the application adopts the following technical scheme:

[0007] An achromatic field lens, comprising a connecting sleeve, which is a circular ring structure with an L-shaped cross section, and an inner thread is arranged on the inner side of the connecting sleeve; and a ring sleeve, which is installed on the right side of the connecting sleeve, and the ring sleeve is a cylindrical hollow structure and is coaxially arranged with the connecting sleeve; a diaphragm plate, which is installed in the middle of the connecting sleeve, and a diaphragm hole is arranged in the middle of the diaphragm plate; and a mounting assembly, which is detachably installed inside the ring sleeve, and the mounting assembly is uniformly installed with lenses with adjustable spacing.

[0008] Further, the mounting assembly comprises a positioning frame, a pressing part and a distance adjusting unit, the positioning frame is in a hollow cylindrical structure, an open slot is arranged in the middle of the upper end of the positioning frame, the open slot is communicated with the inside of the positioning frame, lenses are uniformly arranged in the inside of the positioning frame, the pressing parts are uniformly arranged on the open slot, the pressing parts correspond to the lenses one by one, recessed grooves are symmetrically arranged on the outside of the positioning frame, the distance adjusting unit is arranged in the recessed groove, the pressing part and the distance adjusting unit are matched to adjust the distance between the lenses.

[0009] Further, the pressing part is in an arc structure, a pressing groove matched with the outer contour of the lens is arranged in the inside of the pressing part, clamping parts are symmetrically arranged on the lower end of the pressing part, and the clamping parts are matched with the distance adjusting unit.

[0010] Further, the distance adjusting unit comprises a threaded rod, a rotating seat, a sliding block one and a sliding block two, the threaded rod is arranged in the inside of the recessed groove through a bearing, the rotating seat is arranged on the rear end of the positioning frame, the rear end of the threaded rod is connected with the rotating seat, a hexagonal screw hole is arranged on the rotating seat, the sliding block one is arranged in the middle of the threaded rod through a bearing, two sections of external threads are arranged on the left and right sides of the threaded rod, the two sections of external threads are oppositely arranged, the sliding block two is connected with each section of the external thread through a threaded matching mode, and the upper ends of the sliding block one and the sliding block two are provided with sockets.

[0011] Further, the lower end of the clamping part is matched with the socket, clamping blocks are uniformly arranged on the outside of the clamping part, the clamping blocks are in a trapezoidal structure, the clamping blocks are arranged in an extendable mode, and clamping grooves matched with the clamping blocks are uniformly arranged on the inner wall of the socket.

[0012] Further, the lower end of the clamping part is matched with the socket, clamping blocks are uniformly arranged on the outside of the clamping part, the clamping blocks are in a trapezoidal structure, the clamping blocks are arranged in an extendable mode, and clamping grooves matched with the clamping blocks are uniformly arranged on the inner wall of the socket.

[0013] Further, the pressing pad is made of elastic material, and anti-skid protrusions are uniformly arranged on the inner side of the pressing pad.

[0014] In the above technical scheme, the chromatic aberration field lens provided by the utility model, the upper end of the connecting sleeve is connected with the laser end head, the laser emitted by the laser end head is incident into the inside of the mounting assembly through the diaphragm hole in the middle of the diaphragm plate, the lenses in the inside of the mounting assembly can make the laser and the visual imaging light coaxial and focus on the same point, so that the focal planes of the two are coincident, when the distance between the lenses needs to be adjusted, the threaded rod is screwed by a wrench, the external thread on the threaded rod drives the sliding block two to move inward or outward synchronously, so that the distance between the two sliding block twos and the sliding block one is accurately adjusted, the lenses can be synchronously adjusted with the sliding block two, and then the function of accurately adjusting the distance between the lenses can be realized, the clear imaging of the CCD in the field of view is ensured, and the demand of visual positioning laser processing is met. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model is further illustrated below in combination with the drawings and embodiments.

[0016] Figure 1 It is the first three-dimensional structure schematic diagram of the utility model.

[0017] Figure 2 It is the second three-dimensional structure schematic diagram of the utility model.

[0018] Figure 3 It is the cut structure schematic diagram of the utility model.

[0019] Figure 4 It is the half cut structure schematic diagram of the utility model.

[0020] Figure 5 It is the three-dimensional structure schematic diagram of the installation assembly of the utility model.

[0021] Figure 6 It is the cut structure schematic diagram of the installation assembly of the utility model.

[0022] Mark explanation: 1, connecting sleeve, 2, annular sleeve, 3, diaphragm plate, 4, installation assembly, 41, positioning frame, 42, compression part, 421, clamping part, 422, clamping block, 423, air bag, 424, compression pad, 43, distance adjusting unit, 431, threaded rod, 432, rotating seat, 433, sliding block one, 434, sliding block two. DETAILED DESCRIPTION

[0023] In order to make the technical personnel in the field better understand the technical scheme of the utility model, the utility model will be further introduced in detail below in combination with the drawings.

[0024] Please refer to Figures 1-6 The utility model discloses an achromatic field mirror, including connecting sleeve 1, it is the circular ring structure of the section and presents L type, and the internal thread is arranged on the inside surface of connecting sleeve 1;And annular sleeve 2, it is installed in the right side of connecting sleeve 1, and annular sleeve 2 is cylindrical hollow structure, and annular sleeve 2 and connecting sleeve 1 are arranged on the same axis;Diaphragm plate 3, it is installed in the middle part of connecting sleeve 1, and the diaphragm hole is arranged in the middle part of diaphragm plate 3;Installation assembly 4, it is detachably installed inside annular sleeve 2, and the lens 5 of adjustable spacing is evenly installed in the inside of installation assembly 4.

[0025] In the above technical scheme, the upper end of connecting sleeve 1 is connected with laser end head, and the laser emitted by laser end head is incident to the inside of installation assembly 4 through the diaphragm hole in the middle part of diaphragm plate 3, and the lens 5 in the inside of installation assembly 4 can make laser and visual imaging light completely coaxial, and focus to the same point, so that the focal plane of both is coincident, and this characteristic helps to realize the clear imaging of CCD in the field of view, and meets the demand of visual positioning laser processing.

[0026] It should be noted that the spacing between the lenses 5 inside the mounting assembly 4 and the size of the lenses 5 themselves are generally adjusted according to the needs of use to ensure that the specific application requirements are met, thereby effectively improving the clarity and color restoration of imaging, and thus widely used in photography, video, telescopes, microscopes, spectral analysis, laser processing, and optical measurement and other fields.

[0027] Referring to Figure 5 As shown in the preferred technical solution of the present embodiment, the mounting assembly 4 includes a positioning frame 41, a pressing member 42, and a distance adjusting unit 43. The positioning frame 41 is in a cylindrical hollow structure, and an open slot is provided in the middle of the upper end of the positioning frame 41, which is in communication with the inside of the positioning frame 41. The lenses 5 are uniformly installed inside the positioning frame 41. The pressing members 42 are uniformly provided on the open slot, and each pressing member 42 corresponds to a lens 5. The positioning frame 41 is symmetrically provided with a concave groove on the outside, and the distance adjusting unit 43 is installed in the concave groove. The pressing member 42 and the distance adjusting unit 43 cooperate with each other to adjust the spacing between the lenses 5.

[0028] In the above technical solution, the lenses 5 to be used are placed inside the open slot, and the lenses 5 can be clamped and fixed by the pressing member 42, so that the lenses 5 can remain stationary, ensuring the stability of imaging. By adjusting the spacing between the lenses 5, the focus point of laser and visual imaging can be adjusted, and the chromatic aberration phenomenon can be eliminated or reduced to meet the needs of visual positioning laser processing.

[0029] Referring to Figures 5-6 As shown in the preferred technical solution of the present embodiment, the pressing member 42 is in an arc-shaped structure, and a pressing groove is provided inside the pressing member 42 to cooperate with the outer contour of the lens 5. The lower end of the pressing member 42 is symmetrically provided with a clamping member 421, which cooperates with the distance adjusting unit 43.

[0030] In the above technical solution, in order to accurately clamp and fix the lens, a pressing groove is provided inside the pressing member 42. The pressing groove can accurately cooperate with the lens 5, so that the pressing member 42 accurately clamps the lens 5, which is convenient for fixing the lens 5 and adjusting the spacing between adjacent lenses 5.

[0031] Referring to Figure 5As shown in the preferred technical solution of the present embodiment, the distance adjusting unit 43 comprises a threaded rod 431, a rotating seat 432, a sliding block one 433 and a sliding block two 434. The threaded rod 431 is installed inside the concave groove through a bearing. The rotating seat 432 is arranged at the rear end of the positioning frame 41 and connected with the rear end of the threaded rod 431. The rotating seat 432 is provided with a hexagonal hole. The sliding block one 433 is installed in the middle of the threaded rod 431 through a bearing. The threaded rod 431 is provided with two sections of external threads on the left and right sides. The two sections of external threads are oppositely arranged. The sliding block two 434 is connected with each section of external thread through a threaded connection. The sliding block one 433 and the sliding block two 434 are provided with sockets at the upper ends.

[0032] In the above technical solution, when the distance between the lenses 5 needs to be adjusted, the threaded rod 431 is screwed by a wrench. The external threads on the threaded rod 431 drive the sliding block two 434 to move inward or outward synchronously. The distance between the two sliding block two 434 and the sliding block one 433 is accurately adjusted. The lenses 5 can be adjusted synchronously with the sliding block two 434. Thus, the distance between the lenses 5 can be accurately adjusted. The clear imaging of the CCD in the field of view is ensured. The demand of visual positioning laser processing is met.

[0033] Referring to Figure 5 As shown in the preferred technical solution of the present embodiment, the lower end of the clamping piece 421 is inserted into the socket. The clamping piece 421 is uniformly provided with clamping blocks 422 on the outer side. The clamping block 422 is in a trapezoidal structure. The clamping block 422 is arranged in an extendable manner. The socket inner wall is uniformly provided with clamping grooves matched with the clamping blocks.

[0034] In the above technical solution, when the clamping piece 421 is pressed and fixed to the lenses 5, the clamping piece 421 is inserted into the socket. The clamping block 422 is matched with the clamping groove in the socket. Thus, the clamping piece 421 can be fixed. The phenomenon of the clamping piece 421 returning is prevented. The clamping piece 42 can be accurately and tightly matched with the lenses 5.

[0035] Continuously referring to Figure 6 As shown in the preferred technical solution of the present embodiment, the lower end of the clamping piece 421 is provided with an air bag 423. The inner wall of the pressing groove is provided with a pressing pad 424. The pressing pad 424 is communicated with the air bag 423.

[0036] In the above technical solution, when the clamping piece 421 moves downward, the air bag 423 at the lower end of the clamping piece 421 is squeezed. The gas in the air bag 423 is squeezed into the pressing pad 424. The pressing pad 424 is inflated and expanded. Thus, the lenses 5 are squeezed and fixed. The function of pressing and fixing the lenses 5 is realized. The lenses 5 can be tightly integrated with the clamping piece 42. The distance between the lenses 5 can be accurately adjusted.

[0037] Referring to Figure 6 As shown in the preferred technical solution of the embodiment, the compression pad 424 is made of elastic material, and the inner side of the compression pad 424 is uniformly provided with anti-skid protrusions.

[0038] In the above technical solution, when the compression pad 424 is inflated, the compression pad 424 made of elastic material can be deformed to contact the side surface of the lens 5, the anti-skid protrusions can effectively increase the friction, the lens 5 can be prevented from shaking and moving, the clear imaging of the CCD in the field of view can be ensured, and the demand of visual positioning laser processing can be met.

[0039] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for ordinary skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the present application.

Claims

1. An achromatic field lens, characterized in that The utility model relates to a kind of lens installation assembly, including: Connecting sleeve (1), which is a circular ring structure with an L-shaped cross section, has internal threads on the inner side surface of the connecting sleeve (1);And Annular sleeve (2) is installed on the right side of the connecting sleeve (1), and the annular sleeve (2) is a cylindrical hollow structure coaxially arranged with the connecting sleeve (1); Diaphragm plate (3) is installed in the middle of the connecting sleeve (1), and the diaphragm plate (3) is provided with a diaphragm hole in the middle thereof; The mounting assembly (4) is detachably mounted inside the annular sleeve (2), and the mounting assembly (4) is uniformly provided with lenses (5) with adjustable spacing inside.

2. An achromatic field lens according to claim 1, characterized in that The mounting assembly (4) includes a positioning frame (41), a pressing member (42) and a distance adjusting unit (43), the positioning frame (41) is a cylindrical hollow structure, the upper end of the positioning frame (41) is provided with an open slot in the middle, the open slot is communicated with the inside of the positioning frame (41), the lenses (5) are uniformly mounted inside the positioning frame (41), the pressing members (42) are uniformly arranged on the open slot, the pressing members (42) correspond to the lenses (5) one by one, the positioning frame (41) is symmetrically provided with a concave groove on the outside, the distance adjusting unit (43) is installed in the concave groove, and the pressing members (42) and the distance adjusting unit (43) cooperate with each other to adjust the spacing between the lenses (5).

3. An achromatic field lens according to claim 2, characterized in that The pressing member (42) is arc-shaped, and the pressing member (42) is provided with a pressing groove inside for cooperating with the outer contour of the lens (5), and the pressing member (42) is symmetrically provided with a clamping member (421) at the lower end.

4. An achromatic field lens according to claim 3, characterized in that The distance adjusting unit (43) includes a threaded rod (431), a rotating seat (432), a sliding block one (433) and a sliding block two (434), the threaded rod (431) is installed in the concave groove through a bearing, the rotating seat (432) is provided at the rear end of the positioning frame (41), the rotating seat (432) is connected to the rear end of the threaded rod (431), the rotating seat (432) is provided with a hexagonal hole, the sliding block one (433) is installed in the middle of the threaded rod (431) through a bearing, the threaded rod (431) is provided with two outer threads on the left and right sides, the two outer threads are oppositely arranged, and the sliding block two (434) is connected to each outer thread through thread cooperation, and the upper ends of the sliding block one (433) and the sliding block two (434) are provided with a socket.

5. An achromatic field lens according to claim 3, characterized in that The lower end of the clamping member (421) is inserted into the socket, the clamping member (421) is uniformly provided with a clamping block (422) on the outside, the clamping block (422) is trapezoidal, and the clamping block (422) is telescopic, and the socket inner wall is uniformly provided with a clamping groove matched with the clamping block.

6. An achromatic field lens according to claim 4, characterized in that The lower end of the clamping member (421) is provided with an air bag (423), and the inner wall of the pressing groove is provided with a pressing pad (424) in communication with the air bag (423).

7. An achromatic field lens according to claim 6, characterized in that The pressing pad (424) is made of elastic material, and the inner side surface of the pressing pad (424) is uniformly provided with anti-skid protrusions.

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