Method and device for adjusting internal/external diameters of hollow beams

A hollow beam, inner and outer diameter technology, applied in the field of optics, can solve the problems that the inner and outer diameters cannot be changed

Inactive Publication Date: 2013-07-17
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application number is 200810051203.8, which is called a quasi-double half-Gaussian hollow laser beam forming device, see image 3 , the beam formed by this scheme is an approximately parallel beam, and the inner and outer diameters cannot be changed.

Method used

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  • Method and device for adjusting internal/external diameters of hollow beams
  • Method and device for adjusting internal/external diameters of hollow beams
  • Method and device for adjusting internal/external diameters of hollow beams

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Embodiment Construction

[0018] See Figure 5 As shown, the optical system of the hollow beam with adjustable inner and outer diameters is composed of a negative axicon 1, a concave lens 2, and a convex lens 3 in turn. On the negative apex of the axicon 1, the distance between the negative axicon 1 and the concave lens 2 and the distance between concave lens 2 and convex lens 3 And the parameter matching relationship and position relationship of the inner diameter or outer diameter d of the formed beam meet the requirements of the following formula: ,

[0019] ,

[0020] in , , are the focal lengths of the concave lens and the convex lens, respectively, is the refractive index of the lens, is the cone angle of the negative axicon.

[0021] device according to Figure 4 After placing it (where 4 is the plate receiving the light beam), adjust the position of 4, take the intersection of the horizontal line and the broken line as the dividing point, the inner diameter of the hollow bea...

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Abstract

The invention provides a method for adjusting internal / external diameters of hollow beams. A device mainly comprises a negative axicon, a convex lens and a concave lens. The device is characterized in that the concave lens and the convex lens are arranged behind the negative axicon and form a zoom refraction system; and the object focus of the zoom system is exactly arranged at the negative vertex of the negative axicon, so that the light rays passing through the negative vertex are ejected approximately in parallel after passing through the zoom system and other light rays deflect toward thecentral line of the ray axis to form the hollow beams a certain distance behind an optical system. The method and the device have the following advantages: by changing the distances among the lenses,the internal / external diameters of the hollow beams can be quantitatively adjusted; the external diameters can be fixed and the internal diameters can be changed; or the internal diameters can be fixed and the external diameters can be changed; and the device has simple structure, is convenient to adjust and is applied in such fields as laser boring, laser shock, bioengineering and the like.

Description

technical field [0001] The invention discloses a method and device for adjusting the inner and outer diameters of a hollow beam, which realizes the conversion from a solid beam to a hollow beam to a certain extent, and the inner and outer diameters of the hollow beam can be quantitatively adjusted, and belongs to the field of optical technology. Background technique [0002] At present, geometric optical systems for generating hollow beams mainly include axicon lens systems, concave spherical reflection and lens combinations, etc., and these optical systems cannot produce hollow beams with adjustable inner and outer diameters. A Chinese invention patent application with the application number 200410016728.X discloses a technical solution of a single-angle cone collimated hollow laser beam generating device, which belongs to the geometric optics method. See figure 1 , in this scheme, changing the distance of 1 and 2 can change the inner and outer diameters, but the inner and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/09G02B3/00
Inventor 姜银方黄利伟张永康丁桂林叶云霞于天宇黄宇姜文帆
Owner JIANGSU UNIV
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