激光对人眼的危害及其防护材料研究

发布时间：2018-03-08 23:03

本文选题：激光波长　切入点：视觉功能　出处：《东北林业大学》2012年硕士论文　论文类型：学位论文

【摘要】：1960年激光的发明开创了非线性光学新领域。激光在军事领域的应用尤为引人注目,激光干扰与致盲武器发展迅速,随着这类武器的不断发展,自动化程度不断提高,这方面所面临的威胁越来越严重,对激光防护的研究已引起越来越多的国家的高度重视。激光防护的目的是保护己方人员和设备免受激光伤害。纳米材料是一种具有光限幅性质的激光防护材料。其中一维金属纳米材料因其在利用光学材料的非线性光学限幅效应的激光防护作用中的应用而倍受瞩目。本论文介绍了眼睛的构造及视觉功能最基本的生理过程,人的眼睛就像一个照相机。论文阐明了人眼是如何将外界景物传入大脑从而变成视觉的过程。同时也分析了典型激光波长的特点及其对人眼的危害。对非线性防护材料的研究,主要集中在应用基础研究方面。光限幅材料体在对抗激光干扰与致盲武器中具有重要的研究价值。为了探明一维金属纳米材料非线性光学限幅效应的机理,本论文首先用固态离子学方法制备了金属Ag纳米线,并应用扫描电子显微镜(SEM)和X射线衍射仪(XRD)等手段对制备的金属Ag纳米线的微观形貌、晶体结构及化学成分等进行了分析与表征。然后将金属Ag纳米线悬浮于去离子水中,在波长532nm激光脉冲激发下,研究了其在去离子水中的非线性吸收和折射特性。实验发现金属Ag纳米线悬浮于去离子水的非线性吸收和折射特性比较好。最后应用EKSPLA (PL2143A)脉冲激光,在波长为532nm,脉冲宽度为30ps,重复频率1Hz的条件下,研究了金属Ag纳米线悬浮于去离子水中的光限幅特性,并对其限幅特性进行了理论分析。研究表明,金属Ag纳米线具有很好的光限幅性能,这为寻找一种保护眼睛免受激光伤害效果很好的新型材料和为研究激光防护材料提供参考。
[Abstract]:In 1960, the invention of laser opened up a new field of nonlinear optics. The application of laser in the military field is particularly noticeable. Laser jamming and blinding weapons are developing rapidly. With the continuous development of these weapons, the degree of automation is increasing. The threats are becoming more and more serious in this regard, The research on laser protection has attracted more and more attention in many countries. The purpose of laser protection is to protect our personnel and equipment from laser injury. Nanomaterials are a kind of laser protection materials with optical limiting properties. One-dimensional metal nanomaterials have attracted much attention for their applications in laser protection against nonlinear optical limiting effects of optical materials. This paper introduces the basic physiological process of eye construction and visual function. Human eyes are like a camera. This paper illustrates how the human eye can transmit external objects into the brain and turn them into vision. At the same time, the characteristics of typical laser wavelengths and their harm to the human eye are analyzed. Research on nonlinear Protective Materials, The optical limiting material has important research value in resisting laser interference and blinding weapons. In order to find out the mechanism of nonlinear optical limiting effect of one-dimensional metal nanomaterials, In this thesis, Ag nanowires were prepared by solid state ionomics, and the morphology of Ag nanowires was investigated by means of scanning electron microscope (SEM) and X-ray diffractometer (XRD). The crystal structure and chemical composition were analyzed and characterized. Then the Ag nanowires were suspended in deionized water and excited by laser pulses at 532 nm. The nonlinear absorption and refraction properties of Ag nanowires in deionized water were studied. The experimental results showed that the nonlinear absorption and refraction properties of Ag nanowires suspended in deionized water were better. Finally, EKSPLA laser pulse laser was used. The optical limiting characteristics of Ag nanowires suspended in deionized water were studied at a wavelength of 532 nm, pulse width of 30 psand repetition rate of 1 Hz. The theoretical analysis of the limiting characteristics of Ag nanowires in deionized water was carried out. The Ag nanowires have good optical limiting performance, which provides a reference for finding a new material to protect eyes from laser damage and for studying laser protection materials.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TB383.1;R318.08

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