Divergence angle adjusting mechanism of laser beam expander

Abstract

The invention discloses a laser beam expanding lens divergence angle adjusting mechanism, and particularly relates to the technical field of parallel beam expanding, and the laser beam expanding lens divergence angle adjusting mechanism comprises a knob for driving an inner lens seat to reciprocate along the direction of an inner channel of an outer lens seat, and the knob is rotatably arranged on a gland fixedly mounted on the side surface of the outer lens seat; and the end part of a locking screw which is in threaded connection with the pressing cover abuts against the end surface of the pressing cover for locking. According to the divergence angle adjusting mechanism for the laser beam expander, after the divergence angle of the beam expander is adjusted, the lens base is locked, so that the situation that the quality of light spots is affected due to radial movement of the lens is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of parallel light beam expanding technology, in particular to a laser beam expander divergence angle adjusting mechanism. BACKGROUND

[0002] The beam expander is mainly used for expanding laser beam diameter and reducing beam divergence angle. It is mainly used for long-distance lighting or projection, and focusing system. The existing method for adjusting the divergence angle adopts a cylindrical spiral groove structure. After the lens is adjusted in place, the adjusting ring is locked. At this time, the size of the light spot will change to a certain extent. In some applications with high requirements for light spot quality, the adjusting method cannot meet the on-site application SUMMARY

[0003] The purpose of the present application is to provide a laser beam expander divergence angle adjusting mechanism, which can prevent the lens from moving radially and affecting the quality of the light spot when the mirror seat is locked after adjusting the divergence angle of the beam expander.

[0004] In order to achieve the above purpose, the present application provides the following technical scheme:

[0005] A laser beam expander divergence angle adjusting mechanism, comprising a knob for driving an inner mirror seat to reciprocate along the direction of the groove inside an outer mirror seat, the knob is rotatably arranged on a fixedly installed gland on the side surface of the outer mirror seat, and the end of the lock screw threadedly connected to the knob abuts against the end face of the gland for locking.

[0006] Preferably, a lens one is embedded in the emission end port of the outer mirror seat, and the lens one is pressed and fixed by a pressing ring one assembled in the emission end port.

[0007] Preferably, an installation hole is formed in the center of the inner mirror seat to completely observe the two end faces, a lens two is embedded in the installation hole, and the lens two is pressed and fixed by a pressing ring two assembled in the installation hole.

[0008] The center lines of the lens two and the lens one are coaxial.

[0009] Preferably, the pressing ring two is distributed on the side surface of the lens two opposite to the lens one.

[0010] Preferably, the lens two is distributed at one half of the axial length of the inner mirror seat.

[0011] Preferably, a rotating shaft member is fixedly arranged on one side of the knob, and a screw hole extending into the rotating shaft member is formed on the other side, a screw is inserted into the screw hole and threadedly connected to the gland.

[0012] As preferred, the outer mirror seat is provided with a circular groove, and a planar rotating groove is rotatably arranged in the circular groove.

[0013] The end face of the knob is symmetrically fixed with a pin, the pin is extended from an arc waist groove of the gland, and is inserted into a circular hole arranged on the end face of the planar rotating groove.

[0014] As preferred, a guide pin is threadedly connected to the inner mirror seat, and is slidingly arranged in a vortex groove arranged on the end face of the planar rotating groove.

[0015] As preferred, a round head rectangular waist groove is arranged on the outer mirror seat, and the guide pin is slidingly arranged in the round head rectangular waist groove.

[0016] In the above technical solution, the laser beam expander divergence angle adjusting mechanism has the following beneficial effects: the knob is rotated to drive the inner mirror seat to axially reciprocate, and the knob is locked and fixed by a locking screw after adjustment, so that the knob is prevented from continuing to rotate. In other words, the knob is locked, so that the inner mirror seat is prevented from generating radial force, the second lens is prevented from moving radially, and the axial movement of the second lens is limited. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0018] Fig. 1 The overall structure schematic diagram provided by the embodiments of the present application;

[0019] Fig. 2 The cross-sectional structure schematic diagram provided by the embodiments of the present application.

[0020] Explanation of reference signs:

[0021] 1, outer mirror seat; 2, knob; 3, inner mirror seat; 4, gland; 5, pin; 6, guide pin; 7, screw; 8, locking screw; 9, planar rotating groove; 10, pressing ring one; 11, first lens; 12, second lens; 13, pressing ring two. DETAILED DESCRIPTION

[0022] In order to make those skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0023] As Figs. 1-2As shown in the figure, a laser beam expander divergence angle adjusting mechanism includes a knob 2 for driving the inner mirror seat 3 to reciprocate along the direction of the internal channel of the outer mirror seat 1, the knob 2 is rotatably arranged on the side surface of the outer mirror seat 1 and is fixedly installed on the gland 4, and the end of the locking screw 8 threadedly connected to the knob 2 is abutted against the end surface of the gland 4 to be locked.

[0024] Specifically, the gland 4 is fixedly connected to the outer mirror seat 1 through the diagonal positioning screw, and the knob 2 is fixedly installed on the outer mirror seat 1 through the gland 4 and can rotate circumferentially.

[0025] Further, the rotation of the knob 2 can drive the mirror seat 3 to move, which can be achieved through the cooperation of a screw rod and a rack, or the meshing of a spiral tooth disc and a conical gear, or any other driving mode known to those skilled in the art.

[0026] The side wall of the movable mirror seat 3 is provided with at least one reinforcing rib, and the reinforcing rib is located in the groove formed in the inner wall of the outer mirror seat 1 to form a limiting fit, i.e., to limit the circumferential rotation of the movable mirror seat 3.

[0027] In the above-mentioned technology, the knob 2 is rotated to drive the inner mirror seat 3 to reciprocate axially, and when the adjustment is completed, the locking screw 8 is locked to prevent the knob 2 from continuing to rotate. That is, the knob 2 is locked to ensure that the inner mirror seat 3 does not generate a radial force, so that the lens 12 does not move radially, and the axial movement of the lens 12 is also limited.

[0028] As a further embodiment of the present application, in combination with Fig. 2 As shown in the figure, the emission end port of the outer mirror seat 1 is inlaid with a lens 11, and the lens 11 is pressed and fixed by a pressing ring 10 assembled in the emission end port.

[0029] Specifically, the pressing ring 10 can be a metal piece or an elastic plastic piece, and the outer wall thereof is wrapped with a rubber suit. It can be installed in a threaded manner or a clamping manner to fix the lens 11 and facilitate the subsequent replacement and maintenance work of the damaged lens 11.

[0030] As a further embodiment of the present application, in combination with Fig. 2 As shown in the figure, the center of the inner mirror seat 3 is provided with an installation hole penetrating through the two end surfaces, and a lens 12 is inlaid in the installation hole and is pressed and fixed by a pressing ring 13 assembled in the installation hole.

[0031] Further, the center line of the lens 12 is coaxial with the center line of the lens 11.

[0032] Secondly, the pressing ring 13 is distributed on the side surface of the lens 12 opposite to the lens 11.

[0033] Furthermore, the second lens 12 is located at half of the axial length of the endoscope base 3 .

[0034] Specifically, the pressing ring 2 13 can be a metal or elastic plastic part with a rubber cover wrapped around its outer wall. It can be installed by screw thread or snap connection to fix the lens 2 12 and facilitate the subsequent replacement and maintenance of the lens 2 12 if it is damaged.

[0035] As another embodiment further provided by the present invention, Fig. 2 As shown, a rotating shaft is fixedly provided on one side of the knob 2, and a screw hole extending into the rotating shaft is opened on the other side. A screw 7 with one end threaded and the other end threadedly connected to the pressure cover 4 is inserted into the screw hole.

[0036] Specifically, a matching groove for the shaft to extend into is provided on the pressure cover 4 in the above embodiment, and then the shaft is passed through the screw 7 and threadedly installed with the pressure cover 4, and there is a predetermined gap between the knob 2 and the pressure cover 4, that is, the two will not interfere with normal rotation after installation.

[0037] As another embodiment further provided by the present invention, Fig. 2 As shown, a circular groove is provided on the outer mirror base 1, and a plane rotation groove 9 is rotatably provided in the circular groove;

[0038] The end surface of the knob 2 is symmetrically fixed with a pin 5, which extends into the arc-shaped waist groove opened on the pressure cover 4 and is inserted into the circular hole opened on the end surface of the plane rotating groove 9.

[0039] Furthermore, a guide pin 6 is threadedly connected to the endoscope seat 3 , and the guide pin 6 is slidably arranged in a vortex groove formed on the end surface of the plane rotation groove 9 .

[0040] Specifically, the plane rotating groove 9 in the above embodiment is synchronized by the pin 5 and the knob 2, that is, when the knob 2 rotates, the corresponding plane rotating groove 9 will also rotate in the same direction and at the same speed. The guide pin 6 here is inserted into the vortex groove provided on the end face of the plane rotating groove 9, and the outer lens holder 1 is provided with a round-headed rectangular waist groove, and the guide pin 6 is slidably set in the round-headed rectangular waist groove. Therefore, when the plane rotating groove 9 rotates, the guide pin 6 is driven to move. Because the limit of the round-headed rectangular waist groove cannot rotate circumferentially, it can only move along the guide direction in the round-headed rectangular waist groove under the drive of the vortex groove, thereby driving the lens 2 12 away from or close to the lens 1 11.

[0041] The foregoing merely illustrates some exemplary embodiments of the application, and it will be appreciated that those skilled in the art will be able to devise various modifications without departing from the spirit and scope of the application. The appended drawings and description are illustrative only, and are not intended to be limiting.

Claims

1. A laser beam expander divergence angle adjustment mechanism, characterized in that: The invention comprises a knob (2) for driving the inner mirror seat (3) to reciprocate along the inner groove direction of the outer mirror seat (1), which is rotatably arranged on a pressure cover (4) fixedly installed on the side of the outer mirror seat (1) and is locked by the end of a locking screw (8) threadedly connected thereto abutting against the end face of the pressure cover (4).

2. The laser beam expander divergence angle adjustment mechanism according to claim 1, characterized in that: A lens 1 (11) is embedded in the emission end port of the outer lens seat (1), and the lens 1 (11) is pressed and fixed by a pressure ring 1 (10) assembled in the emission end port.

3. The laser beam expander divergence angle adjustment mechanism according to claim 1, characterized in that: The center of the endoscope seat (3) is provided with a mounting hole for thoroughly observing the end faces at both ends, and a second lens (12) is embedded in the mounting hole, and the second lens (12) is pressed and fixed by a second pressing ring (13) assembled in the mounting hole; The center lines of the second lens (12) and the first lens (11) are coaxial.

4. The laser beam expander divergence angle adjustment mechanism according to claim 3, characterized in that: The second pressing ring (13) is distributed on the side of the second lens (12) relative to the first lens (11).

5. The laser beam expander divergence angle adjustment mechanism according to claim 3, characterized in that: The second lens (12) is located at half of the axial length of the endoscope seat (3).

6. The laser beam expander divergence angle adjustment mechanism according to claim 1, characterized in that: A rotating shaft is fixedly provided on one side of the knob (2), while a screw hole extending into the rotating shaft is provided on the other side, wherein a screw (7) having a threaded end and a threaded end connected to the pressure cover (4) is inserted into the screw hole.

7. The laser beam expander divergence angle adjustment mechanism according to claim 1, characterized in that: The outer mirror seat (1) is provided with a circular groove, and a plane rotation groove (9) is rotatably provided in the circular groove; A pin (5) is symmetrically fixedly mounted on the end surface of the knob (2). The pin (5) extends from the arc-shaped waist groove provided on the pressure cover (4) and is inserted into a circular hole provided on the end surface of the plane rotation groove (9).

8. The laser beam expander divergence angle adjustment mechanism according to claim 1, characterized in that: A guide pin (6) is threadedly connected to the endoscope seat (3), and the guide pin (6) is slidably arranged in a vortex groove provided on the end surface of the plane rotation groove (9).

9. The laser beam expander divergence angle adjustment mechanism according to claim 1, characterized in that: A round-headed rectangular waist groove is provided on the outer mirror seat (1), and a guide pin (6) is slidably arranged in the round-headed rectangular waist groove.

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