查询词典 optics

It has been demonstrated that this kind of materials are applicable in a wide range fields, such as nonlinear optics, two-photon absorption and emission materials, electron-transporting and emissive materials in organic light-emitting devices as well as chemosensors.

这类材料已经显示出非常广阔的潜在应用前景，可以用作非线性光学材料、双光子吸收和发光材料、有机电致发光器件中的电子传输材料和发光材料以及化学传感器等。

The "emmetropia" in geometrical optics and "the normal eye of refraction" in biomedicine were two different concepts, and should be differentiated.

几何光学的"正视眼"与生物医学角度的屈光"正常眼"是两个不同概念，应予以区分

The vapour and plasma ignition times of the target are got based on the equation of heat conduction and cascade model. We suppose that the plasma is ignited when 210 generations of new electrons are born in vapour generation time. The influence of temperature on the thermodynamics and optics parameters of material also have been considered in the model. The resulting theory has good agreement with the experiment and overseas report. A blade method to measure the laser spot is given in this paper with validation and error analysis. The plasma threshold of metals in atmosphere and water ambients both are diagnosed with the light deflection and piezoelectric transducer. A Q-switched pulsed Nd:YAG laser operating at infrared (1064nm), visible(532nm) and ultraviolet (355nm) wavelengths has been used. Al、Fe、Cu are used as targets and get a similar results with both method. Theoretical and experimental analyses are applied on the influence of wavelength on the threshold have been done, both of which have shown that the plasma threshold of metals decrease as the laser wavelength increases; The plasma threshold of metals are higher in water than in air and the pressure of the shock wave in water is five times higher than in air.

从热传导方程和雪崩电离机制出发，假设当电子增值2~(10)倍时，考虑了温度对材料热力学和光学参数的影响时，得到了气化和等离子体点燃的时间，利用该模型进行计算得到的结果与国内外报道及自行通过实验测得的阈值基本一致；提出了利用刀刃法测量激光光斑面积的方法，并通过实验进行了验证和误差分析；利用光偏转装置和压电换能器分别对空气和水中金属等离子体点燃阈值进行了实验诊断，激光器均为调Q—YAG激光器(波长1064nm，532nm，355nm，脉宽10ns)，靶材分别为Al、Fe和Cu，两种测试方法得到的等离子体点燃阈值基本一致；本文从实验和理论计算两个方面讨论了波长对等离子体点燃阈值的影响，均得到了等离子体点燃阈值随着波长的增加而减小的结论；对空气中和水中不同环境下金属等离子体的点燃阈值进行了比较研究，得到了金属在水中的等离子体点燃阈值比空气中的大，且水中产生的冲击波的压强是空气中的5倍左右的结论。

However, because of the new high-speed networks based on fiber optics, there may not be a need for any error control at this layer.

然而，随着新的基于光纤的高速网络的出现，在这一层上不必再进行错误控制了。

And the development of painting in the western world received great momentum from the study of linear perspective and Euclidean optics.

而西方绘画的发展，也受到达芬奇时代透视法和光学的研究的推动。

Digital optical image processing benefits greatly from thecharacteristics of parallelism and low energy loss and the capability for large amount offan-in and fan-out without interference by optics.

它不仅通过结构元素对图象的操作来完成图象增强等常规图象处理功能，而且对图象的结构进行理解。

This paper discuses the postulate of phased-carrier interferential fibre-optics hydrophone having farad revolving mirror and corresponded PGC detecting technology.

论文详细讨论了带法拉第旋转镜的相位载波干涉型光纤水听器的基本原理及相应的PGC检测技术。

Thermal optics simulation and evaluation for infrared lens base on finite element analysis［J］.

基于有限元分析的红外镜头热光学仿真与评价［J］。

The system can be used for applications like MEMS, BioMEMS, Integrated Optics, Micro Fluidics or any other application that requires high precision, high resolution microstructures.

设备可应用于 MEMS， BioMEMS，集成光路以及其他高精度的微观结构应用领域。

In addition to the employment of the traditional four media, Zhejiang has also actively introduced new advertising media such as fiber optics, fluorescent screen, tickets and so on.

除了利用传统的四大媒介，浙江还积极推出了新的广告媒体：光导纤维、荧光屏、门票等等。

Cable dampener cannot be rolled up but must be hung over the cable.

缆帆不能被卷起，必须保证处于展开状态

"This skylark is a present from my master," he says.

"这只云雀是我主人献上的礼物。"他说。