自聚焦

It has been p roved that the fiber2op t ic confocal senso r system behave as a linear sh ift invariance system, perfo rm s like a lowpass filter and has h igh axial reso lut ion.

结果表明，系统相当于一复振幅线平移不变系统，具有低通特性和层析特性。关键词：共焦显微成像；相干传递函数；光纤传感器；自聚焦透镜；光学检测

The rotary graded-index lens collimates the light from the SM fiber, PIN photo detector transfers the optical signal to electric signal, and the semiconductor laser gives out the regenerate optical signal and lets the ray keep up transmitting in fiber communications system.

旋转状态下的自聚焦透镜准直光纤输出的光信号，并由PIN光电探测器将其转换为电信号，再由激光器根据电信号再生出原始光信号继续在光纤通讯系统中传输。

In this thesis Firstly, the physical mechanism and fabricating method of PLA were studied theoretically and experimentally.

本文首先从理论和实验两方面，较全面系统地研究了自聚焦平面微透镜阵列的形成原理和制作工艺。

It goes with the tide of miniaturizing and integrating of optical devices, represents the improvement of gradient index lens from individual to array.

它顺应了光学元件微小化和阵列化的趋势，体现了自聚焦透镜由分立元件向阵列元件的发展。

Based on the theory of gas molecular absorption spectrum,structure of transmission type gas cell that based on GRIN lens is designed.

基于气体分子红外吸收光谱的原理，设计了基于自聚焦透镜的透射式气室结构。

Transmission type gas cell that based on GRIN lens is applied to absorption spectrum optical fiber gas sensor ,and good detecting effect is obtained.

基于自聚焦透镜的透射式气室成功地应用于基于谐波检测技术的吸收型光纤气体传感器系统中，获得较好的检测效果。

Parameters analyzing and making of selfoc lens row .

自聚焦排透镜参数分析及制作。

On the basis of the theory of Gaussian light beams transmission and applying principles of matrix optics and theory of Gaussian light coupling, a theoretical equation for calculating the return loss of fiber collimator with beveled end face and GRIN lens is derived.

在高斯光束传输理论的基础上，利用矩阵光学的原理和高斯光束耦合理论得出了斜面耦合自聚焦透镜型光纤准直器的回波损耗的数学表达式。

The dynamic process of the small-scale self-focusing of ultrashort laser pulse is experimentally investigated.

实验研究了超短脉冲激光的空间小尺度自聚焦的动态变化过程。

With respect to multiple dominant scatterers in one range bin, a nonlinear least squares autofocusing algorithm is proposed.

第五章在建立机动目标成像的信号模型基础上，对机动目标ISAR成像的自聚焦问题进行了讨论。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。