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요약정보
FLEET光学系统参数优化 / Parameters optimization of FLEET optical system
Resource Type
Academic Journal
Authors
王建新
;
陈爽
;
陈力
;
杨文斌
;
邱荣
;
白福忠
;
李同洪
;
Wang Jianxin
;
Chen Shuang
;
Chen Li
;
Yang Wenbin
;
Qiu Rong
;
Bai Fuzhong
;
Li Tonghong
Source
光电工程 / Opto-Electronic Engineering
. 49(4):39-46
Subject
FLEET
流速测量
荧光寿命
图像处理
Language
Chinese
ISSN
1003-501X
Online Access
Scopus
Find it @ DONGA
초록
FLEET流场测速时,荧光丝的形态和特征影响流场速度测量的精度和覆盖范围,而这些参数又取决于FLEET光学系统参数,有必要对FLEET光学系统参数对荧光丝的影响规律进行研究.本文研究了光学系统的主要参数飞秒激光脉冲能量和聚焦透镜焦距对荧光丝长度、光丝峰值强度、功率密度、信噪比的影响,并在最优实验参数条件下,对不同压强下空气飞秒荧光丝的寿命进行探测.实验表明,飞秒荧光丝的激发存在功率密度阈值,本实验中大致在2×1013 W/cm2,光学系统参数优化应以飞秒荧光丝信噪比高且光丝强度分布均匀为基准.飞秒荧光丝的寿命约为几微秒,因此,两次测速采样的时间间隔应小于微秒量级.本文研究结果可以为FLEET光学系统主要参数确定提供依据.
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