Laser beam expander with good sealing performance

Abstract

The utility model discloses a laser beam expander with good sealing performance, which comprises a first cylinder and a second cylinder, the second cylinder is slidably mounted on the inner wall of the first cylinder, a convex lens is mounted at one end of the second cylinder, a concave lens is mounted on the inner wall of the first cylinder, a second sealing ring is attached to the outer wall of the convex lens, and the second sealing ring is mounted on the outer wall of the concave lens. A third sealing ring is attached to the rear surface of the convex lens, and the outer wall of the third sealing ring and the outer wall of the second sealing ring are fixedly connected to the inner wall of the second barrel. The distance between the concave lens and the convex lens is adjusted through sliding of the first cylinder body and the second cylinder body, the convex lens is sealed through attaching of the second sealing ring and the third sealing ring, the fixing strength is improved, the heat insulation ring is clamped to the annular clamping groove and attached to the third sealing ring, and heat loss and dust interference of the third sealing ring in the second cylinder body are prevented; and the light beam transmission efficiency and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser beam expander technical field, specifically, relate to a laser beam expander with good sealing. BACKGROUND

[0002] Laser beam expander is a kind of optical element for adjusting laser beam divergence angle, its diameter is enlarged by laser beam, and expander is usually combined by multiple optical lenses, and common configuration has magnifying glass combination, refractive type or reflective type design. It is widely used in laser transmission, laser radar, optical fiber communication and laser processing and other fields. By optimizing the quality and propagation characteristics of laser beam, laser beam expander plays a key role in improving system performance, prolonging laser propagation distance and the like.

[0003] However, in the long-time running process of high-power laser, the temperature around the internal lens of expander is increased due to heat concentration, the configuration of heat insulation ring is usually ignored in traditional structure, which is easy to cause aging and deformation of sealing material, and further damage the sealing property and affect the beam collimation and transmission stability, in addition, in the long-time running process of high-power laser, the temperature around the internal lens of expander is increased due to heat concentration, which is easy to cause aging and deformation of sealing material in the interior of lens barrel, and further damage the sealing property and affect the beam collimation and transmission stability. UTILITY MODEL CONTENT

[0004] The utility model aims at at least one of the technical problems existing in the prior art.

[0005] Therefore, one purpose of the utility model is to provide a laser beam expander with good sealing, which seals the convex lens by the second sealing ring and the third sealing ring and improves the fixing strength, and prevents the third sealing ring in the second cylinder from being damaged by heat by using the heat insulation ring, to improve the beam transmission efficiency and stability.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a laser beam expander with good sealing, comprising a first cylinder and a second cylinder, the second cylinder is slidably installed on the inner wall of the first cylinder, one end of the second cylinder is provided with a convex lens, the inner wall of the first cylinder is provided with a concave lens, the outer wall of the convex lens is attached with a second sealing ring, the rear surface of the convex lens is attached with a third sealing ring, the outer wall of the third sealing ring and the second sealing ring is fixedly connected to the inner wall of the second cylinder, the inner wall of the second cylinder is provided with an annular clamping groove, one side of the third sealing ring is attached with a heat insulation ring, the heat insulation ring is clamped on the annular clamping groove through an annular protrusion, one side of the heat insulation ring is attached to the second sealing ring, the cross section of the second sealing ring is wedge-shaped.

[0007] Preferably, the outer wall of the second barrel is fixedly connected with equidistantly arranged first sealing rings, and the cross section of the first sealing ring is tooth-shaped.

[0008] Preferably, the one end of the first barrel away from the second barrel is fixedly connected with a rear end cover.

[0009] Preferably, the one side of the rear end cover is mounted with a laser emitter.

[0010] Preferably, the inner wall of the first barrel is fixedly connected with a limiting ring.

[0011] Preferably, the outer wall of the first barrel is fixedly connected with an annular plate, and the annular plate is provided with a threaded hole.

[0012] Compared with the prior art, the utility model has the beneficial effects that: the utility model discloses a first barrel and a second barrel are used for adjusting the distance between a concave lens and a convex lens, the convex lens is sealed and fixed by a second sealing ring and a third sealing ring, a heat insulation ring is clamped in an annular clamping groove and is attached to the third sealing ring, the third sealing ring in the second barrel is prevented from being damaged by heat and dust, and the light beam transmission efficiency and stability are improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of the laser beam expander with good sealing property of the utility model embodiment.

[0014] Figure 2 It is an enlarged structure schematic view of part A of the utility model embodiment. Figure 1

[0015] In the drawing: 1, first barrel;2, second barrel;3, concave lens;4, convex lens;5, rear end cover;6, laser emitter;7, annular plate;8, threaded hole;9, first sealing ring;10, limiting ring;11, second sealing ring;12, third sealing ring;13, heat insulation ring;14, annular clamping groove;15, annular convex. DETAILED DESCRIPTION

[0016] The technical scheme in the utility model embodiments will be clearly and completely described with reference to the drawings in the utility model embodiments, and apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0017] Please refer to Figure 1 The embodiment of the utility model provides a laser beam expander with good sealing property, which comprises a first barrel 1 and a second barrel 2.

[0018] ​As shown in Figure 1 The second cylinder 2 is slidingly installed on the inner wall of the first cylinder 1, one end of the second cylinder 2 is installed with a convex lens 4, the inner wall of the first cylinder 1 is installed with a concave lens 3, and the end of the first cylinder 1 away from the second cylinder 2 is fixedly connected with a rear end cover 5, and one side of the rear end cover 5 is installed with a laser emitter 6.

[0019] The laser emitter 6 on the rear end cover 5 can emit laser through the convex lens 4 and the concave lens 3 after being powered on, at this time, by slidingly matching the first cylinder 1 with the second cylinder 2, the distance between the convex lens 4 and the concave lens 3 is changed to realize the adjustment of the light beam.

[0020] Further, the inner wall of the first cylinder 1 is fixedly connected with a limiting ring 10, and the limiting ring 10 can limit the moving distance of the second cylinder 2 inside the first cylinder 1.

[0021] In this embodiment, as shown in Figure 1 and Figure 2 The outer wall of the convex lens 4 is attached with a second sealing ring 11, the rear surface of the convex lens 4 is attached with a third sealing ring 12, the outer walls of the third sealing ring 12 and the second sealing ring 11 are fixedly connected to the inner wall of the second cylinder 2, the inner wall of the second cylinder 2 is provided with an annular clamping groove 14, one side of the third sealing ring 12 is attached with a heat insulation ring 13, the heat insulation ring 13 is clamped on the annular clamping groove 14 through an annular protrusion 15, and one side of the heat insulation ring 13 is attached to the second sealing ring 11. The cross section of the second sealing ring 11 is wedge-shaped.

[0022] In use, the outer wall of the convex lens 4 is attached with the second sealing ring 11, the rear surface is attached with the third sealing ring 12, and the third sealing ring 12 and the second sealing ring 11 together attach and stabilize the convex lens 4 while ensuring the sealing of the edge of the convex lens 4, avoiding dust entering the inside of the cylinder through the gap of the convex lens 4 to affect the light beam adjustment effect, at the same time, the inner wall of the second cylinder 2 is provided with an annular clamping groove 14, the annular clamping groove 14 clamps the heat insulation ring 13, one side of the heat insulation ring 13 is attached with the third sealing ring 12, preventing the heat accumulation of the second cylinder 2 from damaging the third sealing ring 12 when the laser passes through for a long time.

[0023] Further, the outer wall of the second cylinder 2 is fixedly connected with a plurality of first sealing rings 9 arranged at equal intervals, the cross section of the first sealing ring 9 is serrated, and the first sealing ring 9 can increase the sealing between the first cylinder 1 and the second cylinder 2.

[0024] As shown in Figure 1 The outer wall of the first cylinder 1 is fixedly connected with an annular plate 7, the annular plate 7 is provided with a threaded hole 8, and the threaded hole 8 on the annular plate 7 can fix the first cylinder 1 in the laser beam expander mounting bracket together with the fixing piece.

[0025] According to the technical scheme, the working steps of the scheme are summarized and combed: when in use, the distance between the convex lens 4 and the concave lens 3 is changed through the sliding fit of the first cylinder 1 and the second cylinder 2, the adjustment of the light beam is realized, the outer wall of the convex lens 4 is attached to the second sealing ring 11, the rear surface is attached to the third sealing ring 12, the third sealing ring 12 and the second sealing ring 11 are attached to the convex lens 4 together to ensure the sealing property of the edge of the convex lens 4, and dust is prevented from entering the inside of the cylinder through the gap of the convex lens 4 to affect the light beam adjustment effect.

[0026] Meanwhile, the inner wall of the second cylinder 2 is provided with an annular clamping groove 14, the annular clamping groove 14 clamps the heat insulation ring 13, one side of the heat insulation ring 13 is attached to the third sealing ring 12, the heat insulation ring 13 prevents the third sealing ring 12 from being damaged due to heat accumulation when the laser passes through the second cylinder 2 for a long time, and the efficiency and stability of the light beam transmission of the laser beam expander are improved, and the intrusion of dust in the external environment is effectively prevented.

[0027] The parts not involved in the utility model are the same as the prior art or can be realized by using the prior art. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A laser beam expander with good sealing performance, comprising a first cylinder (1) and a second cylinder (2), characterized in that: the second cylinder (2) is slidingly installed on the inner wall of the first cylinder (1), one end of the second cylinder (2) is provided with a convex lens (4), the inner wall of the first cylinder (1) is provided with a concave lens (3), the outer wall of the convex lens (4) is attached with a second sealing ring (11), the rear surface of the convex lens (4) is attached with a third sealing ring (12), the outer walls of the third sealing ring (12) and the second sealing ring (11) are fixedly connected to the inner wall of the second cylinder (2), the inner wall of the second cylinder (2) is provided with an annular clamping groove (14), one side of the third sealing ring (12) is attached with a heat insulation ring (13), the heat insulation ring (13) is clamped on the annular clamping groove (14) through an annular protrusion (15), one side of the heat insulation ring (13) is attached to the second sealing ring (11), and the cross section of the second sealing ring (11) is wedge-shaped.

2. The laser beam expander of claim 1, wherein: The outer wall of the second cylinder (2) is fixedly connected with a plurality of first sealing rings (9) arranged at equal intervals, and the cross section of the first sealing ring (9) is tooth-shaped.

3. The laser beam expander of claim 1, wherein: The end of the first cylinder (1) away from the second cylinder (2) is fixedly connected with a rear end cover (5).

4. The laser beam expander of claim 3, wherein: One side of the rear end cover (5) is provided with a laser emitter (6).

5. The laser beam expander of claim 1, wherein: The inner wall of the first cylinder (1) is fixedly connected with a limiting ring (10).

6. The laser beam expander of claim 1, wherein: The outer wall of the first cylinder (1) is fixedly connected with an annular plate (7), and the annular plate (7) is provided with a threaded hole (8).

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