The method to measure the Bidirectional Reflectance Distribution Function (BRDF) of selected surface materials was developed with Frequency-Modulation Spectroscopy (FMS) using a Tunable Diode Laser (TDL) under strong environmental light influence such as natural illumination and artificial light.
介绍一种利用频率调制光谱技术 ,在自然环境光下进行材料双向反射分布函数 (BRDF)的测量方法 用该方法对若干墙面靶材料的反向散射双向反射分布函数进行了测量 ,并给出了被测材料的BRDF拟合函数参量 测量环境模拟了以墙面材料为反射靶的激光现场遥感探测气体测量环境 ,其结果对此类探测仪器的设计具有指导意
Study on the Optical-Fiber Vortex-Shedding Flowmeter Based on the Optical Frequency Modulation Principle;
基于光频率调制原理的光纤涡街流量计的研究
Frequency mondulation, which is not possible with polychromatic light.
多色光不可能调制频率。
Modulation-Free Laser Frequency Locking by AOM Shifted Cesium Sub-Doppler Spectra
声光偏频亚多普勒光谱无调制激光频率锁定
center frequency
中心频率未调制频率
Accurate measurement of frequency response of high-speed optical intensity modulator using frequency sweeping method
扫频法精确测量高速光调制器频率响应
modulator carrier
调制器载(波)频(率)
modulation frequency ratio
调制频率与载频之比
Modulation-Free Laser Frequency Locking by AOM Based on Molecular Absorption Line of CH_4
基于甲烷分子吸收线的声光偏频无调制激光频率锁定
modulation frequency-carrier ratio
调制频率－载波比率
fibre optic video modem
光纤视频调制解调器
automatic frequency control
自动频率控制自动频率调整
modified modified frequency modulation
改进的改进频率调制
The relationships between the EOM crystal temperature and the RAM,as well as stabilized laser frequency are observed.
观测了电光晶体温度与剩余幅度调制和光频标锁定后激光频率之间的变化关系。
Frequency Control System of Slip-frequency phasor for AC Motor Speed control
交流变频调速的滑差频率矢量变频控制系统
Frequency modulation(FM): the form of modulation in which the frequency of the carrier is varied in accordance with the instantaneous value of the modulating signal.
频率调制:载波的频率依照调校讯号的瞬时值而改变的一种调制。
It is made clear through the theoretical analysis that the frequency shift is dependent on the modulation frequency, thermal time constant, bias current of the laser diode and so on.
理论分析表明频移幅度与调制频率、时间常数和半导体激光器的偏置电流等物理量有关。
Recent Progresses of LD Pumped Solid State Lasers with High Repetition Rate Electro-Optic Q-Switch
高重复频率电光调Q全固态激光器研究进展
Amplitude-Frequency Modulation Mechanism of Chandler Wobble of Triaxial Earth
三轴地球Chandler晃动的振幅-频率调制机制