光学透镜

Measuring weak absorptance of thin film coatings by surface thermal lensing technique.

表面热透镜技术探测光学薄膜的微弱吸收。

The mechanical measurement is to use an indicator to measure the surface or the edge of the testing lens mounted in a specific holder in a contact way. The principle of the optical measurement is the geometric optics, utilizing the properties of refraction or reflection of light to detect the centering error of the testing elements in a contactless way.

机械式的测量是利用指示器配合治具对待测透镜之外缘或表面进行接触式测量；而光学式的测量原理则是利用几何光学的折射或反射性质，对待测元件进行非接触式的偏心误差量测。

High-precision spherical components have been widely used in precision machinery and aerospace industry, and spherical curvature is one of determinant to the capability of optical components, and the measure of it is an important matter in the optical component manufacture. So the research of the high precision measurement of spherical curvature has important significance.

中文摘要高精度球面元件在精密机械和航天工业中的应用越来越广泛，在光学生产的加工制造过程中也大量需要对具有球面形状的透镜的曲率半径进行高精密测量的情况，因此，球面元件曲率半径的精密测量对高质量球面样板，光学系统的质量控制等方面具有重要的意义。

In this paper,we chosed the Piranha package LED as lighting sourse,and designed the reflector cavity and pillow lens,and built the 3D model of tail lamp in the structure software Catia,and obtained the optical simulation results of tail lamp in the optical simulation software TracePro,and we succeed in developing a LED tail lamp in last;After the testing in automotive lamp center,it was proved that our lamp achieved the national standard of automotive lamps.

摘 要：采用食人鱼系列的发光二极管(light em itting d iodes，简称LED)作光源，进行枕型透镜与反射腔的设计，在结构软件Catia中建立了一款后位灯的三维模型，并利用光学软件T raceP ro进行光学效果的仿真，开发出了一款LED后位灯。样品经汽车灯具测试中心检测，性能满足国家标准要求。

A method of the optical image encryption based on the frequency splitting domain and Fresnel domain is proposed, after the analysis of the fractional Fourier transform and Fresnel transform, by synthesizing the advantages of multi keys and lensless feature of the fractional Fourier transform and Fresnel transform in the optical image encryption system.

结合分数傅里叶变换及菲涅耳变换，在光学图像加密系统中分别具有多密钥性和无透镜性的优点，提出了基于分频域和菲涅耳域的光学图像加密方法。

Zhejiang University, Hangzhou 310027Unique optical properties of the simple lens composed of left-handed material are reasonedly studied here according to Geometrical Optics.

利用几何光学方法研究了由左手性介质制成的简单透镜的光学特性。

B. Make lenses, louvers, or other light diffusing elements contained in frames removable, but positively held within the frames so that hinging or other motion of the frame will not cause the diffusing element to drop out.

B。将透镜、百叶、或者其他的光学附件安装在可以拆卸移动的框架中，但是一定要安装紧密，以防止移动这些框架的时候将上述光学附件滑落在地。

The optical systems often consist of the optical accessories of the lens、prism、spectroscope、reflector and so on, their surfaces usually contain two classes which are sphere and plane.

一般的光学系统是由透镜、棱镜及分光镜、反射镜等光学零件组成，其面形通常是球面和平面两大类。

Tempotec Optics Co., Ltd is a professional manufacturer of optical components. We can provide many kinds of optical components such as optical window, mirror, waveplate, filter, beamsplitter, prism, lens, etc.

福州惠宝光学有限公司公司位於福州市洪山科技园，专业生产高品质的精密光学元件，包括窗片、滤波片、反射镜、波片、分光片、棱镜、透镜等。

The original technology is based on the far-field optical but all of them are restricted by Rayleigh diffraction limit.In order to break optical diffraction limit restrictions, people improve recording density in three ways:(1) shorten wavelength of light,(2)increase numerical aperture of the lens N.A.

不过上述储存方式所采用的记录技术皆是在远场光学的领域内，在远场光学的绕射极限下，要持续提升记录密度的方法有三种；(1)缩小光源波长(2)提高透镜的数值孔径

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。