大学自主招生光学、近代物理试题选析

光学分为几何光学和物理光学,几何光学研究光如何传播的问题,物理光学研究光是什么的问题．几何光学中常考知识点为光的折射,物理光学中常考知识点是光的干涉、光电效应等．原子及原子核物理中常考知识点有玻尔理论和原子核的衰变．     

Dependence of electrical and optical properties of IGZO films on oxygen flow

Amorphous InGaZnO (a-IGZO) films were deposited on the corning eagle XG (EXG) glass substrates using magnetron sputtering method. The structure, surface morphology, electrical and optical properties of these films were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), semiconductor parameter analyzer and spectrophotometry, respectively. The influence of oxygen flow on the electrical properties of IGZO thin films was studied, showing that increasing oxygen flow changes the resistivity with six orders of magnitude. The contact resistance of ITO/IGZO is 7.35×10⁻² Ω·cm², which suggests that a good ohmic contact exists between In₂O₃: Sn (ITO) and IGZO film.     

Flat-top and low-dispersion optical interleavers based on nested prism pair structure

A novel flat-top and low-dispersion optical interleaver using ring cavities (RCs) in a Mach-Zehnder interferometer (MZI) is proposed. It is composed of eight mirrors and two nested prism pairs. Each prism and the two mirrors behave as a RC. Phase shift of RC is a periodic function of the frequency of the input light which acts as a phase dispersive mirror. The two phase shifts needed to achieve a flat-top spectral passband are provided by Fresnel reffectivities at the prism-air interface of the two RCs. The...     

Overall plan and design of the task management system of ternary optical computer

In this paper an overall scheme of the task management system of ternary optical computer (TOC) is proposed, and the software architecture chart is given. The function and accomplishment of each module in the system are described in general. In addition, according to the aforementioned scheme a prototype of TOC task management system is implemented, and the feasibility, rationality and completeness of the scheme are verified via running and testing the prototype.     

康耐特光学与凯越眼镜战略合作新闻发布会在上海取得圆满成功

2011年2月19日下午14:00,康耐特光学与凯越眼镜战略合作新闻发布会在上海市漕宝路和颐酒店胜利召开,数十家行业媒体单位代表和记者出席了发布会。列席会议的主要领导有:上海康耐特光学股份有限公司董事长费铮翔;《中国眼镜科技》总编贺庆;上海市眼镜协会秘书长胡东方;丹阳市眼镜商会秘书长汤金斌以及江苏康耐特凯越光学眼镜有限公司经理乔静鸣。该新闻发布会主题鲜明、意义深远且在业界具有一定的影响。在眼镜业即将全面进入战略转型的大环境下,合作双方能够理清思路,在市场发展中发掘先机,积极联手的高度战略意识使得该新     

Optical QPSK/16QAM modulation based on serial-parallel MZM scheme in radio-over-fiber system

A novel scheme of optical modulation in 40 GHz radio-over fiber (RoF) system is proposed. It generates optical QPSK/16QAM signals in a serial-parallel structure of Mach-Zehnder modulators (MZMs). The millimeter-wave is obtained with optical frequency multiplication (OFM). Furthermore, modulation on optical-wave is transferred onto millimeter-wave. It can be used to increase transmission capacity of millimeter-wave RoF systems.     

鄱阳湖沙化土地植被重建问题与对策研究

根据江西省林业厅调查数据的总结分析,阐明了鄱阳湖沙化土地的变化情况和现状,分析了鄱阳湖沙化土地形成的自然、社会及政策层面的原因;根据江西省自然气候条件和沙化土地形成原理,从生态恢复、社会经济及政策协调三个方面提出了鄱阳湖沙化土地植被重建对策。     

浅谈在普通物理教学中引入基尔霍夫衍射理论

光波的衍射是波动光学的重要部分．而求出衍射屏上光强分布毒达式成为定量研究衍射现象的关键．由于教材篇幅限制及专业要求不同，陈光学专业教材外，现行普通物理的光学教材只阐述惠更斯一菲涅耳原理，并用它来定性、半定量地讨论具有特殊形状的开孔或障     

两种解决凸透镜成像动态问题的有效方法

凸透镜成像的问题是初中光学中数量最多、难度最大的一类题目,在初中光学中占有重要地位.特别是这类题目中的焦距f、物距u、像距v发生变化引起物、像性质的改变,称之为“凸透镜成像的动态”问题的判断,更因多个因素的互动呈现出的动态变化的特点,不易找到问题解决的切入点,引起