本文選題：激光波長　切入點：視覺功能　出處：《東北林業(yè)大學》2012年碩士論文　論文類型：學位論文

【摘要】：1960年激光的發(fā)明開創(chuàng)了非線性光學新領域。激光在軍事領域的應用尤為引人注目,激光干擾與致盲武器發(fā)展迅速,隨著這類武器的不斷發(fā)展,自動化程度不斷提高,這方面所面臨的威脅越來越嚴重,對激光防護的研究已引起越來越多的國家的高度重視。激光防護的目的是保護己方人員和設備免受激光傷害。納米材料是一種具有光限幅性質的激光防護材料。其中一維金屬納米材料因其在利用光學材料的非線性光學限幅效應的激光防護作用中的應用而倍受矚目。 本論文介紹了眼睛的構造及視覺功能最基本的生理過程,人的眼睛就像一個照相機。論文闡明了人眼是如何將外界景物傳入大腦從而變成視覺的過程。同時也分析了典型激光波長的特點及其對人眼的危害。 對非線性防護材料的研究,主要集中在應用基礎研究方面。光限幅材料體在對抗激光干擾與致盲武器中具有重要的研究價值。為了探明一維金屬納米材料非線性光學限幅效應的機理,本論文首先用固態(tài)離子學方法制備了金屬Ag納米線,并應用掃描電子顯微鏡(SEM)和X射線衍射儀(XRD)等手段對制備的金屬Ag納米線的微觀形貌、晶體結構及化學成分等進行了分析與表征。然后將金屬Ag納米線懸浮于去離子水中,在波長532nm激光脈沖激發(fā)下,研究了其在去離子水中的非線性吸收和折射特性。實驗發(fā)現(xiàn)金屬Ag納米線懸浮于去離子水的非線性吸收和折射特性比較好。最后應用EKSPLA (PL2143A)脈沖激光,在波長為532nm,脈沖寬度為30ps,重復頻率1Hz的條件下,研究了金屬Ag納米線懸浮于去離子水中的光限幅特性,并對其限幅特性進行了理論分析。研究表明,金屬Ag納米線具有很好的光限幅性能,這為尋找一種保護眼睛免受激光傷害效果很好的新型材料和為研究激光防護材料提供參考。
[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.
【學位授予單位】：東北林業(yè)大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TB383.1;R318.08

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