Focusing method and focusing device

A focusing method and focusing device technology, applied in optical components, optics, instruments, etc., can solve complex, high cost, difficult to apply industrial production and other problems, and achieve the effect of small focusing spot, design difficulty and low cost requirements

Active Publication Date: 2020-06-02
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to achieve a smaller focused spot, complex and high-cost equi

Method used

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  • Focusing method and focusing device
  • Focusing method and focusing device
  • Focusing method and focusing device

Examples

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Example Embodiment

[0024] The implementation of the present application will be further described below in conjunction with the drawings. The same or similar reference numerals in the drawings indicate the same or similar elements or elements with the same or similar functions throughout. In addition, the implementation manners of the application described below in conjunction with the drawings are exemplary, and are only used to explain the implementation manners of the application, and cannot be understood as a limitation of the application.

[0025] See Figure 1 to Figure 3 , The focusing method of the embodiment of this application includes the following steps:

[0026] 011: modulate the incident light emitted by the light source 11 into radially polarized light;

[0027] 012: Phase-encode the radially polarized light through the phase plate 30; and

[0028] 013: The encoded radially polarized light is directed to the mirror 40 to obtain a focused spot. The reflective surface 42 of the mirror 40 ...

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Abstract

The invention provides a focusing method. The focusing method comprises the following steps: modulating incident light emitted by a light source into radially polarized light; performing phase encoding on the radially polarized light through a phase plate; and emitting the coded radial polarized light to a reflector to obtain a focusing light spot, wherein the reflecting surface of the reflector is a paraboloid. According to the focusing method and the focusing device, phase encoding is carried out on the modulated radial polarized light; focusing is carried out by using a reflecting mirror ofwhich the reflecting surface is a paraboloid to obtain a focusing light spot; compared with a lens, the reflector can realize larger NA (such as NA = 1), so the phase plate can perform phase encodingwith fewer light-transmitting areas, not only can obtain smaller focusing light spots, but also has lower design difficulty and cost requirements, and can meet the requirements of industrial production.

Description

technical field [0001] The present application relates to the fields of super-resolution imaging, lithography and data storage, and in particular to a focusing method and a focusing device. Background technique [0002] Due to the characteristics of monochromaticity, high brightness, collimation and small divergence angle, laser plays an important role in microscopic measurement and precision detection, and is widely used in laser data storage, laser radar, lithography equipment and scanning microscopes. aspect. In lithography and high-density data storage, in order to achieve higher resolution measurements, it is usually necessary to focus the laser beam to a super-resolution focused spot. However, in order to achieve a smaller focused spot, complex and high-cost equipment is required, which is difficult to apply to industrial production. Contents of the invention [0003] Embodiments of the present application provide a focusing method and a focusing device. [0004] ...

Claims

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Application Information

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IPC IPC(8): G02B27/28
CPCG02B27/28
Inventor 付健
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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