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Combined axicon device

An axicon and combined technology, which is applied in the laser field, can solve the problems of increasing processing cost, increasing the difficulty of component processing, limiting non-diffracting beams, etc., and achieving the effect of reducing processing cost and processing difficulty

Active Publication Date: 2017-10-13
SHANDONG INST OF AEROSPACE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the pyramidal structure of the axicon, the use of it to generate non-diffraction beams is limited by the base angle of the axicon. To produce high-quality, long-distance non-diffraction beams requires the smaller the base angle of the axicon. This increases the It increases the processing difficulty of the components and increases the processing cost, thus limiting the application of non-diffracting beams

Method used

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Embodiment 1

[0040] Such as figure 2 with Figure 4 As shown, the combined axicon device structure of the present embodiment includes a gland 1, a negative axicon 2, a positive axicon 4, between the negative axicon 2 and the positive axicon 4, and with the negative axicon 2 and the positive axicon The shape of 4 matches the optical medium, the lens barrel 3, the sealing plug 5, the nut 6 and the gasket 7;

[0041] The concave cone surface of described negative axicon 2 is opposite to the convex cone surface of positive axicon 4; Wherein Fig. 1 (a) is negative axicon structure schematic diagram of the present invention; Fig. 1 (b) is positive axicon structure of the present invention schematic diagram;

[0042] The negative axicon 2 and the positive axicon 4 are respectively fixed at the two ends of the lens barrel 3, and the contact surfaces of the negative axicon 2, the positive axicon 4 and the lens barrel 3 are provided with gaskets 7;

[0043] The lens barrel 3, that is, the space b...

Embodiment 2

[0047] Such as image 3 with Figure 5 As shown, the combined axicon device structure of the present embodiment is designed as a slidable structure, including a gland 1, a negative axicon 2, a positive axicon 4, between the negative axicon 2 and the positive axicon 4, and with the negative The optical medium whose shape matches the axicon 2 and the positive axicon 4, the lens barrel 3, the sealing plug 5, the nut 6, the gasket 7 and the sliding cylinder 8;

[0048] The concave cone surface of described negative axicon 2 is opposite to the convex cone surface of positive axicon 4; Wherein Fig. 1 (a) is negative axicon structure schematic diagram of the present invention; Fig. 1 (b) is positive axicon structure of the present invention schematic diagram;

[0049] The sliding tube 8 is matched and nested in the lens barrel 3;

[0050] The negative axicon 2 is fixed on the nesting end of the slide tube 8 and the lens barrel 3, and the positive axicon 4 is fixed on the other end...

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Abstract

The invention provides a combined axicon device. A negative axicon and a positive axicon are adopted to form the combined axicon device; through replacement of a filling medium between the positive axicon and the negative axicon or changes of the gap between the positive axicon and the negative axicon, the traditional combined axicon can break through limitations from the base angle of a single axicon, high-quality and long-distance diffraction-free beams are generated, the optical medium refractivity between the positive axicon and the negative axicon is changed, and thus, the maximum diffraction-free distance of the combined axicon device can be changed, and tuning on parameters such as the diffraction-free distance is facilitated; and besides, by adopting the combined axicon device, the processing difficulty of a single element can be reduced, the processing cost is thus reduced, and application of the diffraction-free beams is expanded.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to a combined axicon device. Background technique [0002] The axicon is an optical element proposed by McLeod in 1954. The so-called axicon is a refraction or diffraction imaging axisymmetric optical element that can generate a hollow laser beam. The light passing through the axicon will continue to expand along its central axis. Approximate non-diffraction beams can be produced within a certain range. It has extremely important applications in the field of optics. Now there are various axicons, which can be divided into positive pyramids and negative pyramids according to their different functions. When the light beam passes through the axicon, after reflection and transmission, the light beam converges or diverges, but the common point is that they are all a conical lens, which constitute a conical focusing system. [0003] Since Dumin proposed non-diffraction Bessel (Bessel) l...

Claims

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Application Information

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IPC IPC(8): G02B5/00G02B27/09G02B7/00
CPCG02B7/00G02B27/095G02B5/001
Inventor 黄秀军刘亮徐红艳宋镇江张翠翠王凯明石德乐
Owner SHANDONG INST OF AEROSPACE ELECTRONICS TECH
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