光学中“角”问题的归类解析

光学中不管是反射、折射还是全反射都不可避免的存在角度的问题,考查角的问题在高考中也经常出现,整体把握才能轻松解题.一、入射光线与平面镜、反射光线的夹角当入射光线与平面镜的夹角发生变化时,入射光线与反射光线夹角也发生变化;当入射光线方向不变,平面镜以角速度ω旋转,则反射     

拓展学生思维 提高课堂效率

在教学中,直线与圆锥曲线相交问题因方程复杂、计算量大,学生往往感到十分棘手,没有耐心.实际上,对于这些问题,教师可以在课堂教学中利用直线与圆锥曲线的几何特征,引导学生运用化归法、定义法、光学性质、运动的观点去有效的降低计算量,以培养学生的创新思维与解题能力.本文通过一道直线与椭圆相切的课堂实录,说明直线与圆     

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.     

照亮黑暗角落的光芒

Leading:我是一面镜子的一块碎片,我不知道整面镜子的样式和形状。不过,我倾尽所有,能够把光线反射进这个世界漆黑的地方,反射进人们心灵的阴暗处,给他们带来某些改变。也许其他人看到后,也会效仿。这就是我人生的意义。     

局域弯曲液面的光学特性分析

研究了强度均匀分布的平行光束照射局域上（下）弯曲液面时，其反射光场及该反射光场经透镜后的透射光场的分布特点，发现上弯曲液面的反射光场为椭圆形暗场，下弯曲液面的反射光场为星形亮斑。而它们的透射光场恰好类似于对方的反射光场。对这些特点的形成进行了讨论，同时对上弯曲液面的反射光场进行了计算。