1) effective thermal focal length
有效热焦距
2) effective focal length
有效焦距长度
3) equivalent focal length
等效焦距
1.
This paper proposes a new method for estimating the equivalent focal length of digital camera(DC) charge-coupled device(CCD) to the traditional optical camera.
设计两种测量CCD等效焦距的实验方法,分别利用物像距离与物像长度的比例关系和平行双目成像原理,得到与CCD焦距极值对应的等效焦距。
4) thermal lens focus
热焦距
1.
Determining the thermal lens focus of LD end-pumped Nd∶GdVO_4 solid-state laser with CCD detecting method;
CCD测量LD端面抽运Nd∶GdVO_4固体激光器热焦距
2.
The relation between stability zone and thermal lens focus f was analyzed, and the formula of mode volume for the two typical resonators was calculated.
采用矩阵光学的方法对两种典型双棒串接Nd∶YAG激光器谐振腔进行了研究 ,分析了两种腔型的稳定区间和热焦距 f的关系 ,并推导出两种腔型的模体积计算公式 。
3.
Influence of differences of thermal lens focus on beam of two rods solid-state laser has been analyzed.
采用矩阵光学的方法对两级串接Nd:YAG激光器谐振腔进行了研究,分析了热焦距的差异对双棒串接固体激光器的输出光束基模模体积及光束质量的影响 结果表明:两支棒内模体积相等时,模式匹配较好,总的模体积较大 在匹配状态下,有效基模模体积及输出镜上光斑半径得到了较好的改善,输出光束的质量得到了较大的提
5) thermal focus length
热焦距
1.
The figures of laser waist and thermal focus length dependence on pump power are received, too.
由热传导方程得出YAG晶体内的温度分布,模拟出激光晶体的折射率分布,并得到了激光束腰和YAG的热焦距随泵浦功率的变化曲线。
2.
Temperature distribution in YAG crystal is obta ined by heat exchange equation,thermal stress and thermal stress birefringence in YAG crystal are analyzed,the figures of thermal focus length,laser waist and far-field beam divergent angle dependence on pump power are received.
由热传导方程得出YAG晶体内的温度分布 ,分析了激光介质中的热应力和热应力双折射 ,并得到YAG的热焦距及激光束腰和远场发散角随泵浦功率的变化图形。
6) thermal focus
热焦距
1.
Proposes a method for unstable resonator cavity parameter design and correction based on theoretical and thermal focus measurement.
提出了一种理论计算与热焦距实测相结合的非稳腔设计方法，实验表明此方法可行。
2.
Whereas,the stability of many-thermal focus resonator is affected by more factors,such as the arranging of laser head,which need optimizing design.
多热焦距激光谐振腔与单热焦距谐振腔相比,具有结构灵活、热管理简便等优点,然而其热稳定性受到激光头分布等因素影响,需要优化设计以实现多热焦距激光谐振腔高功率稳定输出。
补充资料：变焦距镜头
能在一定范围内改变焦距的摄影镜头。在照相机、电影摄影机或摄像机位置不变时，也能摄下被摄体由远到近或由近到远的画面。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条