CN102139411A - Transmitting and focusing device for laser tube light source - Google Patents

Abstract

The invention relates to a laser tube optical path transmission and focusing device, which comprises a suspension bracket (6) and a laser tube fixing frame (17). The reflective lens (13); the light-emitting side of the reflective lens barrel (12) is connected with the focusing lens barrel (9), the focusing lens seat (8) is screwed on the focusing lens barrel (9), and the focusing lens seat (8) is internally provided with Focusing lenses (10). The vertical adjustment seat (5) is fixed on the suspension support (6), and can vertically slide along the suspension support (6); the horizontal adjustment seat (3) slides horizontally on the vertical adjustment seat (5). The reflector barrel (12) is fixed on the horizontal adjustment seat (3); the reflector lens (13) is fixed in the reflector barrel (12) by means of the pressing iron sheet (14), and the pressing iron sheet (14) is fixed on the reflector barrel (12) on. The invention realizes the accurate transmission and fast focusing of the light source, and has simple structure and convenient operation.

Description

A laser tube light source transmission and focusing device

technical field

The invention belongs to the field of laser optical path forming, and in particular relates to a device for transmitting and focusing laser light emitted by a carbon dioxide laser tube to realize accurate transmission and fast focusing of laser light.

Background technique

As one of the major inventions of the last century, laser has been widely used in industry, military, scientific research and daily life. Human beings in the 21st century have entered the era of optoelectronics, and the further widespread application of laser technology has greatly changed human life. Laser has three characteristics of monochromaticity, coherence and parallelism, and is especially suitable for the processing of materials. Laser processing is the most promising field in laser applications, but in this technology, the realization of optical path design and optical path focusing is always a problem that needs to be solved when using a complete set of laser equipment.

With the continuous penetration of laser processing into various fields, the demand for laser light source transmission and focusing devices is also increasing. At present, the processing and manufacturing technology of laser emitting devices and optical components is becoming more and more mature. However, various laser equipment companies seldom consider the processing of complete sets of laser equipment and the expectations of users, so that the positioning of lasers and the specific laser light path There is a disconnect in the implementation. In production, the manufacturer either only solves the fixing of the laser alone, but does not solve how to position the laser conveniently and accurately for many users; or only produces adjustment devices with multiple degrees of freedom (including laser tube fixing frames, mirror frames, etc. ), so that when using this equipment, the user needs to consider light source transmission and focusing according to actual needs, so as to realize the connection between the laser and each adjustment device, and to ensure the preset laser light path through a cumbersome adjustment process.

In the existing laser engraving equipment, the reflective mirror frame and the three-dimensional light-emitting lens that have been standardized are used, and the optical path system includes three reflections and one focus. The length of the laser head protruding from the focusing lens barrel is adjustable, and when it is adjusted to a suitable protruding length, tighten the hexagon socket bolt for locking to fix it. The fixing method of the focusing lens in the focusing lens barrel is also fixed by using an axial pressure ring. The advantage of this set of devices is that it is more convenient to install the reflective lens and the focusing lens, but its disadvantage is mainly that it will be quite troublesome to adjust the moving plate to the preset position. And before using the laser engraving machine, we need to adjust the center. Because the lens itself has two degrees of freedom of translation up and down, left and right, and the moving plates of several reflector frames need to be adjusted to a suitable angle, these make the new adjustment work quite cumbersome and inconvenient.

Most of the existing patents of laser focusing devices rely on sophisticated electronic equipment to realize the adjustment and control of the optical path, such as Chinese patent CN101085492A. Such patents have high requirements for the use of equipment, complex debugging, and high cost, and are not suitable for the promotion and use of small and medium-sized laser machines.

Contents of the invention

The invention provides a laser tube light source transmission and focusing device which is simple and efficient in optical path adjustment and can obtain stable and reliable laser beams.

In order to achieve the above object, the present invention provides the following technical solutions:

A laser tube light source transmission and focusing device, comprising a suspension bracket 6, a laser tube fixing frame 17 fixed with a laser tube 21, a slope is processed on the light incident side of the reflector barrel 1), and a reflector is arranged on the slope 13. The light-emitting side of the reflecting lens barrel 12 is connected with the focusing lens barrel 9 through threads, the focusing lens base 8 is screwed on the focusing lens barrel 9 through threads, and the focusing lens base 8 is provided with a focusing lens 10 inside.

The two sides of the suspension bracket 6 pass through the square holes 1 on both sides of the vertical adjustment seat 5 respectively, and the vertical adjustment seat 5 is fixed on the suspension bracket 6 by the second fastening screw 7, and can vertically slide along the suspension bracket 6; The horizontal adjustment seat 3 slides horizontally on the vertical adjustment seat 5, and is fastened with the vertical adjustment seat 5 by the first fastening screw 2.

The reflector barrel 12 is fixed on the horizontal adjustment seat 3 by the first screw 4; the reflector mirror 13 is fixed in the reflector barrel 12 by the pressing iron sheet 14, and the pressing iron sheet 14 is fixed on the reflector barrel 12 by the second screw 15 .

A plane is machined on the outer contour portion of the reflector barrel 12 on the side below the horizontal adjustment seat 3 and facing the laser tube 21 .

The reflecting mirror 13 is installed at an angle of 45 degrees with the horizontal plane.

The U-shaped plate 18 for alignment is fixed on the level adjustment seat 3 .

The outer surfaces of the focusing lens base 8, the focusing lens barrel 9 and the locking ring 11 are knurled.

The present invention has the following advantages:

(1) The support and positioning of the lens are reliable, and the replacement is convenient;

(2) The device is easy to fix and disassemble;

(2) The adjustment of the light source is simple, convenient and fast, and can be positioned reliably after adjustment;

(3) The whole structure is simple, ingenious and stable.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the present invention;

Fig. 2 is a top view of an embodiment of the present invention.

reference sign

1 Square hole 2 1st fastening screw

3 Level adjustment seat 4 1st screw

5 Vertical adjustment seat 6 Suspension bracket

7 Second fastening screw 8 Focusing lens holder

9 Focusing lens barrel 10 Focusing lens

11 Locking ring 12 Mirror barrel

13 Reflective lens 14 Compression iron sheet

15 second screw 16 third screw

17 Laser tube fixing frame 18 U-shaped plate for alignment

19 Bolts 20 Nuts

21 laser tube

Detailed ways

The present invention will be further described below in conjunction with specific drawings and embodiments.

As shown in FIGS. 1 and 2 , in the present invention, an inclined surface is processed on the light-incident side of the mirror barrel 12 facing the laser tube 21 , and the inclined surface forms an angle of 45 degrees with the horizontal plane. A reflective mirror 13 is arranged on the slope. Optionally, the reflective mirror 13 can be set in the following manner: process a light hole on the inclined surface, the depth of the hole is equal to the thickness of the reflective mirror 13, and the pressing iron sheet 14 tightly presses the reflective mirror 13 into the light. In the hole, the lens surface of the reflective lens barrel 12 is kept flush, and the pressing iron sheet 14 is fixed on the reflective lens barrel 12 by the second screw 15 . Those skilled in the art may use other methods to arrange the reflective mirror 13 on the inclined surface, for example, adopt the method of directly bonding the reflective mirror 13 on the inclined surface. Adopting this structure saves the reflector frame, which greatly reduces the cumbersome procedures when adjusting the reflector frame in all directions.

Process the stepped hole whose diameter increases from the center to the edge in the focusing lens base 8, directly place the focusing lens 10 in the stepped hole with the largest diameter, and the focusing lens base 8 is screwed on the focusing lens barrel 9 by threads. The focusing lens barrel 9 is connected to the reflective lens barrel 12 by threads and locked by a locking ring 11 . By rotating the focusing lens barrel 9 to change the screwing length with the reflecting lens barrel 12, the height between the focusing lens 10 and the focusing object can be changed, and the screwing length varies within the range of 3-30 mm.

The fixation of the mirror barrel 12 is to process the light hole on its boss, and connect it with the horizontal adjustment base 3 through the screw 4 . Because the reflector barrel 12 needs reliable positioning, a plane is processed on the outer contour part of the side below the horizontal adjustment seat 3 and facing the laser tube 21, so that this plane is the same as the plane of the corresponding position on the horizontal adjustment seat 3. Cooperate, guarantee that reflective lens barrel 12 can not rotate after installing.

The adjustment of the relative position of the focusing device and the laser tube 21 is carried out by using the horizontal adjustment seat 3 and the vertical adjustment seat 5 . There are symmetrical square holes 1 on both sides of the vertical adjustment seat 5, and the suspension bracket 6 passes through the square hole 1, and it can slide vertically on the suspension bracket 6 through the square hole 1, and passes through the first Two fastening screws 7 are fastened with the suspension bracket 6 . The horizontal adjustment seat 3 slides horizontally on the vertical adjustment seat 5, and is fastened to the vertical adjustment seat 5 by the first fastening screw 2 at the position where it is expected to stay. The suspension bracket 6 and the laser tube fixing frame 17 are connected by a third bolt 16 .

Focusing lens base 8, focusing lens barrel 9 and locking ring 11 need to be frequently twisted and adjusted during use. In order to prevent relative sliding between hands and parts and increase stability during adjustment, knurling is engraved on the outer surface of the parts to increase friction.

The alignment U-shaped plate 18 used for auxiliary focusing is a U-shaped plate designed to limit the coaxiality of the two holes in order to check whether the light is vertically incident on the light-through hole of the reflector barrel 12 . Before the focus adjustment, the U-shaped plate 18 for alignment and the level adjustment seat 3 are connected by bolts 19 and nuts 20. When it can be judged by the naked eye that the central axis of the light hole of the mirror barrel 12 does not coincide with the central axis of the laser tube , you only need to adjust the corresponding fastening screws to move the two moving plates. When it is moved to a suitable position, it can be fixed by tightening the fastening screw by hand. After focus adjustment, the U-shaped plate for alignment can be removed.

The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the art can make various changes without departing from the spirit and scope of the present invention. Therefore, all equivalent Technical solutions also belong to the category of the present invention, and should be protected within the scope defined by the claims.

Claims (6)

1. laser tube light sources transmit and focusing arrangement, comprise suspension holdfast (6), be fixed with the laser tube fixed mount (17) of laser tube (21), it is characterized in that: the light inlet side in mirror barrel (12) processes an inclined-plane, and a reflecting optics (13) is set on this inclined-plane; The bright dipping side of mirror barrel (12) focuses on microscope base (8) and is tightened on the focusing barrel (9) by screw thread by the focusing barrel that has been threaded (9), focuses on microscope base (8) inside and is provided with focusing lens (10); The dual-side of suspension holdfast (6) passes the vertical square hole (1) of adjusting seat (5) both sides respectively, vertically adjusts seat (5) and is fixed on the suspension holdfast (6) by second trip bolt (7), and can vertically slide along suspension holdfast (6); Horizontal adjusting seat (3) is gone up horizontal slip at vertical adjustment seat (5), and is fastening with vertical adjustment seat (5) by first trip bolt (2).

2. a kind of laser tube light sources transmit according to claim 1 and focusing arrangement is characterized in that: mirror barrel (12) is fixed in horizontal adjusting seat (3) by first screw (4); Reflecting optics (13) dependence compresses iron plate (14) and is fixed in the mirror barrel (12), compresses iron plate (14) and is fixed on the mirror barrel (12) by second screw (15).

3. a kind of laser tube light sources transmit according to claim 1 and 2 and focusing arrangement is characterized in that: described mirror barrel (12) is being positioned at below the horizontal adjusting seat (3) and is partly processing a plane in the face of the outline of a side of laser tube (21).

4. a kind of laser tube light sources transmit according to claim 1 and focusing arrangement is characterized in that: described reflecting optics (13) becomes miter angle to install with horizontal plane.

5. a kind of laser tube light sources transmit according to claim 1 and focusing arrangement is characterized in that: mutatis mutandis U template (18) is fixed on the horizontal adjusting seat (3).

6. a kind of laser tube light sources transmit according to claim 1 and focusing arrangement is characterized in that: described focusing microscope base (8), focusing barrel (9) and retaining ring (11) outer surface are carved with annular knurl.

Images