CN111399239A

CN111399239A - Laser dodging device

Info

Publication number: CN111399239A
Application number: CN202010410496.5A
Authority: CN
Inventors: 孙舟娜
Original assignee: Xiamen Xingzhe Kechuang Technology Co ltd
Current assignee: Xiamen Xingzhe Kechuang Technology Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-07-10

Abstract

The invention discloses a laser dodging device, which has simple structure, low cost, good dodging effect and convenient coupling, and comprises: the light bar is used for homogenizing light; the optical wand fixing device comprises an optical wand sleeve and a sleeve connecting seat, wherein the optical wand sleeve is sleeved on the optical wand and is embedded into the sleeve connecting seat; and the optical fiber focusing device is used for accessing an optical fiber, is positioned at the rear part of the optical rod and is embedded into the sleeve connecting seat.

Description

Laser dodging device

Technical Field

The invention relates to a light source device, in particular to a laser dodging device.

Background

In the fields of laser illumination, laser therapy and the like, it is often necessary to make the light intensity distribution of a laser beam used for illumination uniform. Since the laser beam is gaussian and is distributed unevenly, it needs to be homogenized. For a commonly used fiber laser light source, it is necessary to introduce laser light into a light homogenizing device through a fiber, and then homogenize the introduced laser light. Most of the existing similar technologies are complex in equipment structure and processing technology, and a laser dodging device which is simple in structure, low in cost, good in dodging effect and convenient to couple needs to be developed.

The light bar dodging method is to dodge light by adopting a hollow light bar or a solid light bar. The hollow light bar and the solid light bar are both superposed non-imaging optical devices. The hollow light rod is generally assembled into a polyhedral hollow rod by adopting sheet materials, and the sheet materials are plated with reflecting films which are positioned on the inner surface of the light rod. The solid light bar is generally made of quartz. The incident light is reflected for many times in the light rod to form uniform emergent light spots, when the light rod is solid, the incident light is totally reflected, so that the reflection efficiency is higher than that of the hollow light rod, but the length required by the incident light to achieve the same illumination uniformity is longer than that of the hollow light rod.

Disclosure of Invention

The invention discloses a laser dodging device, which has simple structure, low cost, good dodging effect and convenient coupling, and comprises:

the light bar is used for homogenizing light; the length of the light bar can support multiple reflections of incident light, so that the light spots are uniform.

The optical wand fixing device comprises an optical wand sleeve and a sleeve connecting seat, wherein one part of an optical wand is sleeved on the optical wand sleeve, the other part of the optical wand is sleeved on the sleeve connecting seat, one part of the sleeve connecting seat is sleeved on the optical wand sleeve, and the optical wand sleeve is assisted to fix the optical wand on the sleeve connecting seat.

And the optical fiber focusing device is used for accessing the optical fiber and focusing and coupling the optical fiber light into the optical rod, and the optical fiber focusing device is positioned in the sleeve connecting seat.

Further, the optical fiber focusing device comprises a lens barrel, a lens group and an optical fiber joint.

Furthermore, one end of the lens barrel is located inside the sleeve connecting seat, the lens group is located inside the lens barrel, and one end of the optical fiber connector is located inside the lens barrel and can be connected into the optical fiber through the other end of the optical fiber connector located outside the lens barrel.

Further, the lens group comprises two plano-convex lenses with convex surfaces oppositely arranged. The plane convex lens close to the optical fiber joint is a collimating lens, the optical fiber joint is positioned at the focal plane of the collimating lens, and incident light emitted by the optical fiber is collimated by the collimating lens. And the plano-convex lens close to the optical rod is a short-focus focusing lens, so that the collimated light is coupled into the optical rod after being focused. After the incident light passes through the collimating lens and the short-focus focusing lens, the divergence angle is increased, and the number of reflections in the optical rod is increased. Only when the incident light is reflected in the light bar for a certain number of times, the uniformity of emergent light spots formed after the incident light is emergent can meet the use requirement.

Optionally, the optical fiber focusing device further includes a pressing ring, and the pressing ring is located in the lens barrel and used for fixing the collimating lens and the short-focus focusing lens.

Optionally, the optical wand fixing device further comprises a pressing ring, and the pressing ring is located in the sleeve connecting seat and used for fixing the optical wand.

Optionally, the optical rod is a solid optical rod, and the optical axis cross section of the solid optical rod is a triangle, a quadrangle or a hexagon.

Further, the solid light bar is made of quartz.

Optionally, the light bar is a hollow light bar, the hollow light bar is assembled by using a sheet material, the sheet material is plated with a reflective film, and the reflective film is located on the inner surface of the light bar. The section of the optical axis of the hollow optical rod is quadrilateral.

Has the advantages that:

1. the light bar is adopted for light uniformization, the light uniformizing effect is good, the transmission loss is low, and the light distribution height is uniform after single-mode or multi-mode laser light uniformization.

2. The laser light source output by the optical fiber is easy to couple, and the expansion is convenient.

3. The structure is simple.

4. The cost is low.

Drawings

FIG. 1 is an external view of a laser dodging device

FIG. 2 is a view showing the internal structure of the laser dodging device

FIG. 3 is a light path diagram of a laser dodging device

Detailed Description

The technical solution of the present invention will be further described in detail with reference to specific embodiments. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.

Example 1

The laser dodging device shown in fig. 1-3 comprises:

the light bar 10 is a superposition type non-imaging optical device, and the incident beam of the laser light source is reflected for multiple times in the light bar 10, so that the emergent light spots are uniform. The optical rod can be a solid optical rod or a hollow optical rod, when the solid optical rod is made of quartz, and the section of the optical axis of the optical rod is triangular, quadrangular or hexagonal. When the hollow light rod is a hollow light rod, the hollow light rod is assembled by sheet materials, the sheet materials are plated with reflecting films, the reflecting films are positioned on the inner surfaces of the light rod, and the section of an optical axis of the hollow light rod is quadrilateral.

The light bar fixing device comprises a light bar sleeve 1 and a sleeve connecting seat 2, wherein the light bar sleeve 1 is tubular as shown in figure 2. Illustratively, as shown in fig. 2, the sleeve connecting seat 2 comprises a thin tubular part and a thick tubular part, an inner hole of the thin tubular part can be matched with the optical wand 10 for limiting the radial position of the optical wand 10, and one end of the thin tubular part is provided with an internal thread which can be matched with the optical wand sleeve 1; the thick tubular portion includes an internally threaded bore and an internal bore. The external thread of the pressing ring 8 can be matched with the internal thread of the thick tubular part of the sleeve connecting seat 2, a step hole is formed in the pressing ring 8, and the step hole can be matched with the external circle of the optical rod 10 and used for positioning and fixing the axial position of the optical rod 10. During assembly, the pressing ring 8 is installed in the sleeve connecting seat 2 through thread fit, the optical rod 10 is inserted into the sleeve connecting seat 2, and finally the optical rod sleeve 1 is installed in the sleeve connecting seat 2 through thread fit, as shown in fig. 2.

And the optical fiber focusing device is used for accessing the optical fiber and focusing and coupling the optical fiber light into the optical rod. The optical fiber focusing device comprises a lens barrel 3, a lens group and an optical fiber joint 4. The lens group includes a collimator lens 5 and a short-focus focusing lens 6. The collimating lens 5 and the short-focus focusing lens 6 are both plano-convex lenses, and the convex surfaces of the plano-convex lenses are opposite. Illustratively, as shown in fig. 2, one end of the lens barrel 3 is located inside the sleeve connecting seat 2. The circumscribed circle of the lens cone 3 can be matched with the inner hole of the thick tubular part of the sleeve connecting seat 2. The collimating lens 5 is close to the optical fiber connector 4, the optical fiber connector 4 is located at a focal plane of the collimating lens 5, and incident light emitted by the optical fiber is collimated by the collimating lens 5. The short-focus focusing lens 6 is close to the optical rod 10 and enables the collimated light to be coupled into the optical rod 10 after being focused. After the incident light passes through the collimating lens 5 and the short-focus focusing lens 6, the divergence angle increases and the number of reflections in the light bar 10 increases. Only when the incident light is reflected in the light bar 10 for a certain number of times, the uniformity of the emergent light spot formed after the incident light is emergent can meet the use requirement. Illustratively, as shown in fig. 2, one end of the optical fiber connector 4 is located inside the lens barrel 3, and the other end can access an optical fiber. Illustratively, as shown in fig. 2, the optical fiber focusing device further includes a pressing ring 7, and the pressing ring 7 is located inside the lens barrel 3 and is used for fixing the collimating lens 5 and the short-focus focusing lens 6.

After the optical fiber is connected to the optical fiber connector 4, as shown in fig. 3, the incident light 9 is emitted from the optical fiber through the optical fiber connector 4 located on the focal plane, is collimated by the collimating lens 5 and is diffused by the short-focus focusing lens 6, the divergence angle is increased, and the incident light is reflected in the optical rod 10 for multiple times to form uniform emergent light spots and then is emitted. The laser dodging device can be used for coupling a laser light source output by the optical fiber through the optical fiber.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser dodging device is characterized in that: the light homogenizing device comprises a light bar, and the light bar is used for homogenizing light;

the optical wand fixing device comprises an optical wand sleeve and a sleeve connecting seat, wherein one part of the optical wand is sleeved on the optical wand sleeve, the other part of the optical wand is sleeved on the sleeve connecting seat, one part of the sleeve connecting seat is sleeved on the optical wand sleeve, and the optical wand sleeve is assisted to fix the optical wand on the sleeve connecting seat;

and the optical fiber focusing device is used for accessing an optical fiber and is positioned in the sleeve connecting seat.

2. The laser dodging device of claim 1, wherein: the optical fiber focusing device comprises a lens barrel, a lens group and an optical fiber joint.

3. The laser dodging device of claim 2, wherein: one end of the lens barrel is located inside the sleeve connecting seat, the lens group is located inside the lens barrel, one end of the optical fiber connector is located inside the lens barrel, and the optical fiber can be accessed to the other end of the optical fiber connector located outside the lens barrel.

4. The laser dodging device of claim 2, wherein: the lens group comprises two plano-convex lenses with convex surfaces oppositely arranged.

5. The laser dodging device of claim 4, wherein: the plano-convex lens comprises a collimating lens, and the optical fiber joint is located at the focal plane of the collimating lens.

6. The laser dodging device of claim 2, wherein: optionally, the optical fiber focusing device further includes a pressing ring, and the pressing ring is located in the lens barrel and used for fixing the two plano-convex lenses.

7. The laser dodging device of claim 1, wherein: the optical wand fixing device further comprises a pressing ring, and the pressing ring is located in the sleeve connecting seat and used for fixing the optical wand.

8. The laser dodging device of claim 1, wherein: the light bar is a solid light bar, and the section of an optical axis of the solid light bar is triangular, quadrangular or hexagonal.

9. The laser dodging device of claim 8, wherein: the solid light bar is made of quartz.

10. The laser dodging device of claim 1, wherein: the light bar is a hollow light bar, and the section of an optical axis of the hollow light bar is quadrilateral.