相关实验视频

Updated: Jul 17, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

实现和操纵超长的光学针基于一般化sinc光束的基础上

Yue Pan, Guo-Dong Tan, Tian-Fei Zhao

|November 11, 2025

概括

研究人员开发了一种通用的Sinc Beam (GSB) 来创建超长光针. 这种结构光束为先进的光学应用提供可控制,扩展的焦点深度.

科学领域:

光学和光子学在光学和光子学.
激光物理激光物理
结构光束结构光束

背景情况:

光学针的特点是焦点深度很大,衍射最小,对于各种应用至关重要.
实现超长光针一直是光学物理学的重大挑战.

研究的目的:

提出和研究一种新型结构光束,即通用Sinc光束 (GSB).
通过两个不同的聚焦方案,通过GSB演示使用超长光学针的生成.

主要方法:

利用GSB固有的自我聚焦特性,形成光针.
采用与GSB的紧密聚焦方案来产生光学针.
描述生成的光学针的长度和可控性.

主要成果:

通过自我聚焦,GSB可以形成超长的光学针,达到长度高达2.51 × 10^5λ (λ=532 nm).
紧密聚焦的GSB也产生超长的光学针,长度高达100λ.
生成的光学针具有灵活性和可控性.

结论:

一般化的sinc光束是产生超长光针的有效工具.
这些可控制的超长光学针在光学捕捉,显微镜和光刻方面具有显著的潜力.

更多相关视频

Three-Dimensional Ultrasonic Needle Tip Tracking with a Fiber-Optic Ultrasound Receiver

Three-Dimensional Ultrasonic Needle Tip Tracking with a Fiber-Optic Ultrasound Receiver

Published on: August 21, 2018

$Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing$ 06:16

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing

Published on: April 25, 2019

相关概念视频

Focusing of Light in the Eye

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...