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A system and method for reducing the effects of unwanted orders of optical diffraction devices

A technology of diffractive devices and optical devices, which is applied in the field of optics, can solve problems such as the inability to effectively reduce the impact of unwanted orders, and achieve the effects of reducing adverse effects, increasing the number of beam splits, and the number of multi-beam splits

Active Publication Date: 2022-03-29
南京朔视科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a system and method for reducing the influence of the unwanted order of the optical diffraction device. When the light field distribution of the required order overlaps with the light field distribution of the undesired order, the technical problem that the influence of the undesired order cannot be effectively reduced

Method used

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  • A system and method for reducing the effects of unwanted orders of optical diffraction devices
  • A system and method for reducing the effects of unwanted orders of optical diffraction devices
  • A system and method for reducing the effects of unwanted orders of optical diffraction devices

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Embodiment 1

[0037] A system for subtracting the effects of unwanted orders in optical diffractive devices, such as figure 1 As shown, it includes: a light generator 1, an optical diffraction device 2 and a beam focusing device 4 placed in sequence along the direction of the light path, and an aberration optics placed between the image square focal plane of the light generator 1 and the beam focusing device 4 Device 3; Specifically, in this embodiment, the aberration optical device 3 is placed between the optical diffraction device 2 and the beam focusing device 4;

[0038] Wherein, the light generator 1 is used to provide a light source; the light generator 1 can be a laser, a light emitting diode, a mercury lamp, a halogen lamp, etc.;

[0039] The aberration optical device 3 is used to increase the first optical aberration in the optical path to degrade the beam quality in the optical path; specifically, the aberration optical device 3 can be any optical device that can increase the aber...

Embodiment 2

[0057] A method for reducing the influence of unwanted orders of an optical diffraction device, comprising the following steps:

[0058] S1. Add the first optical aberration in the optical path where the optical diffraction device is located to degrade the beam quality; specifically, the method of increasing the first optical aberration in the optical path includes: using a cylindrical lens to generate astigmatism; or, based on a deformable The irregular reflective surface of the mirror introduces aberrations; or, making the beam incident on the edge of the lens, introduces astigmatism and coma. It should be noted that the first optical aberration is different from the aberration generated by optical devices and optical elements during normal use, and is the aberration added to the optical path by intentionally placing an aberration optical device in the optical path.

[0059] S2. Based on the optical diffraction device, the beam is wavefront modulated to obtain the outgoing l...

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Abstract

The invention discloses a system and method for reducing the influence of unwanted orders of an optical diffraction device, belonging to the field of optics, comprising: a light generator, an optical diffraction device, and a beam focusing device sequentially placed along the direction of the optical path, and placing An aberration optical device between the light generator and the image square focal plane of the beam focusing device; the system increases the first optical aberration in the optical path through the aberration optical device, so that the quality of the beam in the optical path is deteriorated; and when using In the process of wavefront modulation of the incident light beam by the optical diffraction device, the second optical aberration that compensates with the first optical aberration is introduced into the light beam of the required order, so that the light field distribution of the required order remains in a clear state, The light field distribution of an undesired order is degraded by the increased first aberration, thereby effectively reducing the influence of the undesired order.

Description

technical field [0001] The invention belongs to the field of optics, and more specifically relates to a system and method for reducing the influence of unwanted orders of an optical diffraction device. Background technique [0002] Optical diffraction devices are widely used in the field of optics, such as laser processing, biological microscopic imaging, information optical storage, etc. Commonly used optical diffractive devices include gratings, acousto-optic deflectors, spatial light modulators (spatial lightmodulators, SLMs), digital micromirror devices (digital micromirror devices, DMDs), metasurface materials, and diffractive optical elements (diffractive optical elements, DOEs). Wait. The diffractive optical element can modulate the optical parameters (phase, amplitude) of the wavefront of the incident light beam, so as to change the corresponding optical parameters of the wavefront of the outgoing light. At the same time, the magnitude and spatial distribution of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00G02B27/09G02B27/42
CPCG02B27/4205G02B27/0025G02B27/0037G02B27/0944G02B27/0966
Inventor 曾绍群王雨胡庆磊吕晓华
Owner 南京朔视科技开发有限公司
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