Focusing fastening locking collimator

Abstract

The utility model belongs to the field of laser collimators, and discloses a focus-adjustable fastening and locking collimator, which comprises a lens cone assembly, an optical assembly and a pressing and holding piece, the optical assembly and the pressing and holding piece are arranged in the lens cone assembly, and the inner wall of the lens cone assembly is provided with a first thread part and a second thread part along the axial direction. The first threaded part and the second threaded part are opposite in thread turning direction, the optical assembly is in threaded connection with the first threaded part, and the pressing piece is used for being in threaded connection with the second threaded part so as to press and fix the optical assembly; when the pressing and holding piece presses and holds the optical assembly, the pressing and holding piece is connected with the optical assembly so as to be stopped in the circumferential direction, and when the optical assembly focuses, the optical assembly is disconnected from the pressing and holding piece and is separated from the pressing and holding piece. According to the utility model, focusing can be conveniently carried out, the movement of internal components of the collimator can be inhibited through a screw-thread fit structure, fastening and locking are realized, and the stability and reliability of the internal structure are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser collimators, and in particular relates to a focus-adjustable, fastening and locking collimator. Background Art

[0002] With the continuous advancement of laser technology, it has found widespread application in a variety of fields, including manufacturing, healthcare, military, and scientific research. This requires laser collimation and beam expansion tailored to these application requirements. As a key component in this process, the performance of the collimator is directly related to the performance of the output laser. Existing collimator structures mostly employ either a fixed focal length or a motorized focus mechanism. Both approaches are widely used in diverse fields.

[0003] Electric focus collimators are often used in systems that require real-time focusing, or irregular or periodic focusing. Fixed-focus collimators, on the other hand, typically have a non-adjustable structure and no longer require focusing after commissioning. Adjustment during commissioning is difficult and is typically achieved by adding or removing shims. This requires a high level of operator experience, and the long commissioning cycle is not conducive to mass production. Furthermore, under complex operating conditions such as vibration and impact, the beam expander within the collimator can easily rotate or move, causing internal structural changes that can affect the collimation effect. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a method to solve the problem that the existing fixed focal length collimator is difficult to focus and the internal lens group is easy to move under complex working conditions such as vibration and impact, thereby affecting the collimation effect.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A focusable, fastening, and locking collimator comprises a barrel assembly, an optical assembly, and a pressing member. The optical assembly and the pressing member are arranged in the barrel assembly. The inner wall of the barrel assembly is axially provided with a first threaded portion and a second threaded portion. The thread rotation directions of the first threaded portion and the second threaded portion are opposite. The optical assembly is threadedly connected to the first threaded portion, and the pressing member is used to be threadedly connected to the second threaded portion to press and fix the optical assembly. When the pressing member presses the optical assembly, the pressing member is connected to the optical assembly to stop in the circumferential direction. When the optical assembly is focused, the optical assembly is disconnected and separated from the pressing member, so that the optical assembly can move axially within the thread range of the first threaded portion to adjust the focus.

[0007] In a possible implementation, the second threaded portion is provided inside the light-emitting end of the lens barrel assembly, and the inner diameter of the port at the light-emitting end of the lens barrel assembly is greater than or equal to the outer diameter of the holding member so that the holding member can be screwed out of the lens barrel assembly.

[0008] In a possible implementation, the inner diameter of the light-inlet end of the lens barrel assembly is smaller than the inner diameter of the light-outlet end, and the optical assembly includes a beam expander lens assembly.

[0009] In a possible implementation, the optical component also includes a lens barrel with the built-in collimator lens group, the inner wall of the lens barrel assembly is provided with a stepped mounting groove, the lens barrel is pressed in the stepped mounting groove by a pressing member, the first threaded portion is provided on the outer wall of the stepped mounting groove, and the outer wall of the lens barrel is provided with a thread matching the first threaded portion.

[0010] In a possible implementation, the inner wall of the lens barrel assembly is provided with a stepped mounting groove 2 whose inner diameter is larger than that of the stepped mounting groove 1, and the inner wall of the stepped mounting groove 2 is provided with a second threaded portion; the holding member includes a pressing ring, and the outer wall of the pressing ring is provided with a thread 2 matching the second threaded portion.

[0011] In a possible implementation, a gasket is provided between the end of the first lens barrel and the first stepped mounting groove, and the first lens barrel is provided with a glue injection hole extending toward the gasket.

[0012] In a possible implementation, a water-cooling channel is provided inside the lens barrel assembly and is circumferentially distributed outside the optical assembly. The water-cooling channel is communicated with a water joint provided outside the lens barrel assembly.

[0013] In a possible implementation, the lens barrel assembly includes a second lens barrel and a water-cooling shell, an optical component and a holding member are arranged inside the second lens barrel, the water-cooling shell is sleeved on the outside of the second lens barrel and forms the water-cooling channel between the two, and the water joint is arranged on the water-cooling shell.

[0014] In a possible implementation, the lens barrel assembly further includes a transition barrel and a connector, and the lens barrel 2 is sequentially connected to the transition barrel and the connector along the axial direction.

[0015] In a possible implementation, one end of the transition tube connected to the second lens barrel is provided with a flange connection portion, the flange connection portion is connected to the second end of the lens barrel through a fastener, and a first sealing ring is provided between the flange connection portion and the end of the second lens barrel.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The focus-adjustable, fastening and locking collimator of the present invention is mainly aimed at collimation systems with fixed focal lengths that are no longer adjusted after debugging. By adopting two threaded parts to respectively install the optical component and the holding part, the optical component can be pressed and fixed during the holding process, and can also be easily removed. After the holding part is removed, the optical component can be focused, which makes focusing easier. In addition, by adopting the first threaded part and the second threaded part with opposite thread rotation directions and the holding part being stopped in the circumferential direction with the optical component, when in complex working conditions such as vibration and impact, the movement directions of the optical component and the holding part are opposite, thereby suppressing the movement of the internal components of the collimator, achieving fastening and locking, and improving the stability and reliability of the internal structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A stereoscopic view of a focus-adjustable, fastening, and locking collimator;

[0019] Figure 2 It is a three-dimensional cross-sectional view of a focus-adjustable, fastening and locking collimator;

[0020] Figure 3 for Figure 2 The middle part is a partially enlarged schematic diagram;

[0021] Figure 4 An exploded view of an optical assembly and a holding member for a focus-adjustable, fastening, and locking collimator;

[0022] Figure 5 A schematic diagram of the fastening and locking principle of the optical components and the holding member of a focus-adjustable fastening and locking collimator;

[0023] Figure 6 An exploded view of a lens barrel assembly with an adjustable focus and locking collimator;

[0024] Figure 7 The schematic diagram shows the structure of a focus-adjustable, fastening and locking collimator connected to the laser output head to be collimated.

[0025] In the figure: 1-lens barrel assembly; 11-lens barrel 2; 111-stepped mounting slot 2; 112-stepped mounting slot 1; 12-water-cooling housing; 13-transition barrel; 14-connector; 15-water inlet connector; 16-water outlet connector; 17-first sealing ring; 18-second sealing ring; 19-water-cooling channel; 110-heat sink fin; 2-pressing member; 21-pressing ring; 3-optical component; 31-lens barrel 1; 311-screw hole; 312-glue injection hole; 32-beam expander group; 4-washer; 41-tightening notch; 5-fastener; 6-laser output head. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0027] Please refer to Figure 1-7 As shown, an embodiment of the present application provides a focusable, fastening and locking collimator, comprising a barrel assembly 1, an optical assembly 3 and a pressing member 2, wherein the optical assembly 3 and the pressing member 2 are arranged in the barrel assembly 1, and the inner wall of the barrel assembly 1 is axially provided with a first threaded portion and a second threaded portion, wherein the thread rotation directions of the first threaded portion and the second threaded portion are opposite, the optical assembly 3 is threadedly connected to the first threaded portion, and the pressing member 2 is used to be threadedly connected to the second threaded portion to press and fix the optical assembly 3.

[0028] Wherein, the lens barrel assembly 1 is the shell of the collimator, the optical component 3 and the holding member 2 are arranged in the lens barrel assembly 1, the optical component 3 is used to expand and collimate the laser beam incident on the lens barrel assembly 1, and the holding member is mainly used to hold the optical component 3 to be fixed, so that it is in a state of fixed focal length during general use. The optical component 3 is connected in the lens barrel assembly 1 by a first threaded portion, and the holding member 2 is connected in the lens barrel assembly 1 by a second threaded portion. The first threaded portion and the second threaded portion are threaded sections with a certain length in the circumferential direction, which can facilitate the screwing in and out of the optical component 3 and the holding member 2 for easy installation. Since the optical component 3 and the holding member 2 are respectively connected to the inner wall of the lens barrel assembly 1 by a threaded band, the optical component 3 can be axially moved in the connected threaded section. When the holding member 2 does not press the optical component 3, the focusing can be performed by rotating the optical component 3.

[0029] When the pressing member 2 presses the optical component 3, it is connected to the optical component 3 to stop it in the circumferential direction. For example, after debugging, since focusing is no longer required, the pressing member 2 can be tightened to press the optical component 3 to fix it. At this time, the pressing member 2 and the optical component 3 are stopped in the circumferential direction. The stopping method can be achieved by a releasable connection method, such as connecting and fixing the optical component 3 to the pressing member 2 with a fastener 5. Of course, other detachable connection methods such as snap-fitting can also be used. In this way, when the connection is no longer needed, it can be removed to release the connection and circumferential stop. Since the thread rotation directions of the first threaded portion and the second threaded portion are opposite, when the optical component 3 and the holding part 2 are installed in place in sequence in the lens barrel assembly 1, the holding part 2 presses and fixes the optical component 3 and connects it to stop it in the circumferential direction. In this state, if the mechanism is in complex working conditions such as vibration and impact, the optical component 3 and the holding part 2 will have opposite movement trends in the axial direction. When one of the optical component 3 and the holding part 2 stopped in the circumferential direction moves, it will drive the other to rotate in the same rotation direction and move in the opposite movement trend in the axial direction. Since the movement directions of the optical component 3 and the holding part 2 are opposite, the movement of the entire mechanism can be suppressed. Therefore, this structural form will be able to effectively achieve fastening and locking, and improve the stability and reliability of the structure.

[0030] When focusing is required, the optical assembly 3 is disconnected and separated from the pressing member 2, allowing the optical assembly 3 to move axially within the threaded range of the first threaded portion for focusing. When the pressing member 2 is disconnected and separated from the optical assembly 3, such as during the commissioning phase, the optical assembly 3 can move within the threaded range of the first threaded portion, thereby enabling focusing. After focusing, the optical assembly 3 can be re-secured by pressing and reconnecting the pressing member and performing circumferential stop.

[0031] Through the above technical solution, two threaded parts are used to respectively install the optical component 3 and the holding part 2. During the holding process, the optical component 3 can be pressed and fixed, and can also be easily removed. After the holding part 2 is removed, the optical component 3 can be focused, which makes focusing easier. In addition, by adopting the first threaded part and the second threaded part with opposite thread rotation directions and the holding part 2 being stopped in the circumferential direction with the optical component 3, when in complex working conditions such as vibration and impact, the movement directions of the optical component 3 and the holding part 2 are opposite, thereby suppressing the movement of the internal components of the collimator, achieving fastening and locking, and improving the stability and reliability of the internal structure.

[0032] In one embodiment, the second threaded portion is provided inside the light-emitting end of the lens barrel assembly 1 , and the inner diameter of the port at the light-emitting end of the lens barrel assembly 1 is greater than or equal to the outer diameter of the holding member so that the holding member 2 can be screwed out of the lens barrel assembly 1 .

[0033] In this way, the second threaded portion is arranged inside the light-emitting end of the lens barrel assembly 1, and the inner diameter of the port at the light-emitting end of the lens barrel assembly 1 is greater than or equal to the outer diameter of the holding member, so that the holding member 2 can be selected outside the lens barrel assembly 1 during the separation process, so as to facilitate the rotation and focusing of the optical component 3. Such a structure makes focusing more convenient, and at the same time, the threaded structure can avoid the problem of loose internal structure caused by vibration and other problems.

[0034] Furthermore, in order to make the lens barrel assembly 1 more conducive to collimation and beam expansion, the inner diameter of the light-entering end of the lens barrel assembly 1 is smaller than the inner diameter of the light-emitting end, and the optical assembly 3 includes a beam expander lens group 32.

[0035] In this way, by configuring the lens barrel assembly 1 with different inner diameters at both ends, the collimation and beam expansion of the laser beam by the beam expander lens group 32 arranged inside can be facilitated.

[0036] In order to realize the installation of the optical component 3 and the holding member 2 in the lens barrel assembly 1, further, the optical component 3 also includes a lens barrel 31 with the built-in beam expander lens group 32, the inner wall of the lens barrel assembly 1 is provided with a stepped mounting groove 112, the lens barrel 31 is pressed by the holding member 2 in the stepped mounting groove 112, the first threaded portion is provided on the outer wall of the stepped mounting groove 112, and the outer wall of the lens barrel 31 is provided with a thread 1 matching the first threaded portion.

[0037] In this way, the lens barrel 1 31 equipped with the beam expander lens assembly 32 can be threadedly connected to the thread 2 in the stepped mounting groove 1 112 through the thread 1 on the outer wall, and can be locked in place through the stepped mounting groove 1 112, making installation more convenient.

[0038] On this basis, to achieve threaded installation of the holding member 2 and removal of the optical assembly 3, the inner wall of the lens barrel assembly 1 is provided with a second stepped mounting groove 111 having an inner diameter greater than that of the first stepped mounting groove 112. The inner wall of the second stepped mounting groove 111 is provided with a second threaded portion. The holding member 2 includes a pressing ring 21, the outer wall of which is provided with a second thread that matches the second threaded portion. The second stepped mounting groove 111 facilitates locking the pressing ring 21 in place and facilitates the optical assembly 3 to be first passed through the second stepped mounting groove 111 and then installed in the first stepped mounting groove 112 and removed, resulting in a more reasonable structural design.

[0039] In order to achieve elastic buffering, sealing and anti-loosening, a gasket 4 is provided between the end of the lens barrel 1 31 and the stepped mounting groove 1 12 , and the lens barrel 1 31 is provided with a glue injection hole 312 passing through the gasket 4 .

[0040] Gasket 4 can be a rubber ring, which provides good elastic cushioning and sealing for optical assembly 3. Furthermore, by providing a glue injection hole 312 extending through lens barrel 1 31 toward gasket 4, glue injection hole 312 facilitates the injection of glue into the inside. The glue facilitates the fixation of gasket 4, beam expander assembly 32, and lens barrel 1 31, achieving a secure and anti-loosening effect. Specifically, multiple glue injection holes 312 are provided along the circumference of lens barrel 1 31.

[0041] In addition, screw holes 311 can be set on the circumference of the lens barrel 31. The screws passing through the screw holes 311 can be easily connected to or limited by the tightening notches 41 set on the circumference of the gasket 4 and corresponding to the screws, so that they can be stably maintained below the beam expander group 32 in the axial direction, further achieving the effect of fixing and preventing loosening.

[0042] In the embodiment of the present application, a water-cooling channel 19 is provided inside the lens barrel assembly 1 and is circumferentially distributed outside the optical assembly 3 . The water-cooling channel 19 is connected to a water joint provided outside the lens barrel assembly 1 .

[0043] The heat dissipation channel is arranged inside the lens barrel assembly 1. Cooling water can be added to the heat dissipation channel through the water filling joint on the outside. The cooling water can consume the waste heat generated by the internal light emission process and effectively prevent the temperature rise of the lens barrel from affecting the performance of the collimator.

[0044] In a preferred embodiment of the lens barrel assembly 1, the lens barrel assembly 1 includes a second lens barrel 11 and a water-cooling shell 12, wherein the optical component 3 and the holding part 2 are arranged in the second lens barrel 11, the water-cooling shell 12 is sleeved on the outside of the second lens barrel 11 and the water-cooling channel 19 is formed between the two, and the water joint is arranged on the water-cooling shell 12.

[0045] The water-cooling shell 12 is sealedly connected to the lens barrel 2 11. The sealing connection can be achieved by threaded fitting and a second sealing ring 18 is arranged between the two to achieve sealing; a flow channel distributed along the circumferential direction is provided on the outer wall of the lens barrel 2 11, and a plurality of heat dissipation fins 110 are arranged at intervals in the flow channel. The heat dissipation method is circulating heat dissipation, and the water joint includes a water inlet joint 15 and a water outlet joint 16 arranged on the water-cooling shell 12. In this way, after the water-cooling shell 12 is installed on its outside, a water-cooling flow channel 19 for circulating cooling can be formed, so that water cooling heat dissipation can be performed.

[0046] In order to facilitate the connection with the laser light output head 6 to be collimated, the lens barrel assembly further includes a transition barrel 13 and a connector 14, and the lens barrel 2 11 is sequentially connected to the transition barrel 13 and the connector 14 along the axial direction.

[0047] In this way, the transition tube 13 can not only serve as a transition connection between the connector 14 and gradually reduce the diameter, but also form a connection with the connector 14 to extend the lens barrel 11 to the required length, thereby meeting the collimation and beam expansion requirements of the corresponding focal length. The connector 14 is a QBH standard connector, which can be easily connected to the laser output head 6.

[0048] Specifically, one end of the transition tube 13 connected to the second lens barrel 11 is provided with a flange connection portion, which is connected to the end of the second lens barrel 11 via a fastener 5, and a first sealing ring 17 is provided between the flange connection portion and the end of the second lens barrel 11. Such a connection structure can achieve a better sealing function.

[0049] In a specific implementation process, both the first thread portion and the second thread portion adopt optical fine-pitch threads, which makes the adjustment more precise.

[0050] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the claims. Persons skilled in the art will appreciate that improvements and modifications may be made without departing from the spirit and scope of the present invention, and such improvements and modifications shall also be considered within the scope of protection of the present invention.

Claims

1. A focusable, fastening and locking collimator, characterized in that: The invention comprises a lens barrel assembly (1), an optical assembly (3) and a pressing member (2), wherein the optical assembly (3) and the pressing member (2) are arranged in the lens barrel assembly (1), and the inner wall of the lens barrel assembly (1) is provided with a first threaded portion and a second threaded portion along the axial direction, wherein the thread rotation directions of the first threaded portion and the second threaded portion are opposite, the optical assembly (3) is threadedly connected to the first threaded portion, and the pressing member (2) is used to be threadedly connected to the second threaded portion to press and fix the optical assembly (3); when the pressing member (2) presses the optical assembly (3), the pressing member (2) is connected to the optical assembly (3) to stop in the circumferential direction, and when focusing is performed, the optical assembly (3) is disconnected from the pressing member (2) and separated, so that the optical assembly (3) can move axially within the thread range of the first threaded portion to adjust the focus.

2. The focus-adjustable, fastening and locking collimator according to claim 1, characterized in that: The second threaded portion is arranged inside the light-emitting end of the lens barrel assembly (1), and the inner diameter of the port at the light-emitting end of the lens barrel assembly (1) is greater than or equal to the outer diameter of the holding member (2) so that the holding member (2) can be screwed out of the lens barrel assembly (1).

3. The focus-adjustable, fastening and locking collimator according to claim 1, characterized in that: The inner diameter of the light-inlet end of the lens barrel assembly (1) is smaller than the inner diameter of the light-outlet end, and the optical assembly (3) comprises a beam expander lens group (32).

4. The focus-adjustable, fastening and locking collimator according to claim 3, characterized in that: The optical assembly (3) further comprises a lens barrel (31) in which the beam expander lens group (32) is built. The inner wall of the lens barrel assembly (1) is provided with a stepped mounting groove (112). The lens barrel (31) is pressed by a pressing member (2) in the stepped mounting groove (112). The first threaded portion is provided on the outer wall of the stepped mounting groove (112). The outer wall of the lens barrel (31) is provided with a thread matching the first threaded portion.

5. The focus-adjustable, fastening and locking collimator according to claim 4, characterized in that: The inner wall of the lens barrel assembly (1) is provided with a second stepped mounting groove (111) having an inner diameter greater than that of the first stepped mounting groove (112), and the inner wall of the second stepped mounting groove (111) is provided with a second threaded portion; the holding member (2) includes a pressing ring (21), and the outer wall of the pressing ring (21) is provided with a second thread matched with the second threaded portion.

6. The focus-adjustable, fastening and locking collimator according to claim 4, characterized in that: A gasket (4) is provided between the end of the lens barrel (31) and the stepped mounting groove (112), and the lens barrel (31) is provided with a glue injection hole (312) that passes through in the direction of the gasket (4).

7. The focus-adjustable, fastening and locking collimator according to claim 1, characterized in that: The interior of the lens barrel assembly (1) is provided with a water cooling channel (19) distributed circumferentially on the outside of the optical assembly (3), and the water cooling channel (19) is communicated with a water joint provided outside the lens barrel assembly (1).

8. The focus-adjustable, fastening and locking collimator according to claim 7, characterized in that: The lens barrel assembly (1) comprises a second lens barrel (11) and a water-cooling shell (12); an optical assembly (3) and a holding member (2) are arranged in the second lens barrel (11); the water-cooling shell (12) is sleeved on the outside of the second lens barrel (11) and forms the water-cooling channel (19) therebetween; and the water joint is arranged on the water-cooling shell (12).

9. The focus-adjustable, fastening and locking collimator according to claim 8, characterized in that: The lens barrel assembly further comprises a transition barrel (13) and a connector (14), and the second lens barrel (11) is sequentially connected to the transition barrel (13) and the connector (14) along the axial direction.

10. The focus-adjustable, fastening and locking collimator according to claim 9, characterized in that: One end of the transition tube (13) connected to the second lens barrel (11) is provided with a flange connection portion, the flange connection portion is connected to the end of the second lens barrel (11) through a fastener (5), and a first sealing ring (17) is provided between the flange connection portion and the end of the second lens barrel (11).

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