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Radial cosine phase type axial multi-focus regulation system

A cosine phase and control system technology, applied in the field of applied optics, can solve the problems of powerless control of tiny particles, low light energy utilization rate, and increased adjustment difficulty, and achieve convenient multi-focus axial control, convenient control, and light energy utilization rate high effect

Inactive Publication Date: 2008-08-20
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This focusing optical system multi-focus generation technology has considerable advantages, but there are still some shortcomings: 1) in this focusing optical system multi-focus generation technology, the plane of multi-focus distribution is on the plane perpendicular to the system optical axis, so that the light energy Relatively dispersed, if the equivalent light intensity and light gradient force produced by each focal point are guaranteed, the utilization rate of light energy is low, and the required incident laser light source will have a higher output light power; 3) There is an off-axis beam propagation, which increases the difficulty of adjustment and complicates the system structure

Method used

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  • Radial cosine phase type axial multi-focus regulation system
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  • Radial cosine phase type axial multi-focus regulation system

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no. 1 Embodiment

[0028] figure 1 It is a schematic diagram of the first embodiment of the present invention. A radial cosine phase axial multi-focus control system is characterized in that the system is composed of a coherent light source emitting part 1, a beam diameter adjuster 2, a radial cosine phase wavefront adjuster 3, and an optical focusing part 4; the coherent light source emits A beam diameter adjuster 2, a radial cosine phase wavefront adjuster 3, and an optical focusing component 4 are sequentially placed in the direction of the outgoing beam of component 1; the adjusted phase on the radial cosine phase wavefront adjuster 3 presents a cosine function distribution along the radial direction , phase modulation is performed on the wave front of the incident beam, and the parameters of the cosine function are adjustable.

[0029] The coherent light source emitting part 1 is a carbon dioxide gas laser, the beam diameter adjuster 2 is a Galilean beam expander, and the optical focusing ...

no. 2 Embodiment

[0032] Figure 4 It is a schematic diagram of the second embodiment of the present invention, a radial cosine phase type axial multi-focus control system, which works in reflection mode. In the case of reflective mode operation, a beam splitter 6 is placed between the radial cosine phase wavefront adjuster 3 and the beam diameter adjuster 2 .

[0033]A beam diameter adjuster 2, a beam splitter 6, and a radial cosine phase wavefront adjuster 3 are sequentially arranged in the beam emission direction of the coherent light source emitting part 1. The working mode of the radial cosine phase wavefront adjuster 3 is reflection type, and the beam The radiation is reflected back by the radial cosine phase wavefront adjuster 3 , and after passing through the beam splitter 6 again, an optical focusing component 4 is placed in the direction of the reflected beam.

[0034] The coherent light source emitting part 1 is a carbon dioxide gas laser, the beam diameter adjuster 2 is a Galilean ...

no. 3 Embodiment

[0037] Figure 5 It is the schematic diagram of the third embodiment of the present invention. On the basis of the second embodiment, in order to improve the utilization rate of light energy under the reflective working mode, the beam splitter adopts the polarization beam splitter 7, and in the radial direction of the polarizing beam splitter 7 and the reflective working mode A quarter glass slide 8 is placed between the cosine phase wavefront modifiers 3, the direction of the optical axis of the quarter slide 8 forms an angle of 45 degrees with the polarization direction of the incident light, and the quarter slide 8 is a separate optical element.

[0038] The working process of this embodiment is as follows: the coherent light beam emitted by the coherent light source emitting part 1 passes through the beam diameter adjuster 2, and the expanded laser beam passes through the polarizing beam splitter 7 and the quarter glass slide 8 and becomes a meta-polarized beam after being...

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Abstract

The invention belongs to the field of applied optics technique, which relates to a radial cosine phase position type axial direction multi-focus regulation system. The whole system is composed of coherent light source emission component, beam diameter regulator, radial cosine phase position wavefront regulator and optics focus component. The coherent light source emission component outgoing beam is regulated into needed diameter by beam diameter regulator, the optics focus component is focused into focus region. The radial cosine phase position wavefront regulator regulates the part before the incoming wave, which leads the wavefront phase transform into the cosine curve in the radial direction, after the optical focus component focuses, the focuses transform into multi-focus distribution on optical axis, and interval and number of multi-focus can be regulated by cosine function parameter of radial cosine phase position wavefront regulator. The system has advantages of convenient multi-focus axial regulation, high light energy utilization rate, simple system and so on.

Description

Technical field: [0001] The invention belongs to the technical field of applied optics, and relates to a light intensity adjustment system in a focus area of ​​a focusing optical system, in particular to a radial cosine phase axial multi-focus adjustment system. It is mainly used in the fields of laser micromachining, optical micromanipulation, optical information storage, and interaction between light and matter. Background technique: [0002] In many focusing optical systems, the light intensity in the focal area plays a very important role. In the optical storage system, reducing the focal spot size can increase the optical information storage density, and the long focal depth is easy for the laser servo system to work, and the axial multi-focus can be applied to the emerging multi-layer optical storage technology. In the field of optical tweezers, since Ashkin developed optical tweezers, the technology of optical tweezers has developed rapidly, which has promoted the de...

Claims

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Application Information

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IPC IPC(8): G02B26/06G02B27/09G02B27/10G21K1/00
Inventor 李劲松高秀敏
Owner CHINA JILIANG UNIV
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