Frequency modulation is not possible with polychromatic light.
多色光不可能调制频率。
In addition to alternating phase difference between two aims of interferometer, the intensity of light of the interference fringes will vary in the same frequency, which is called as phase modulation.
当两相干光附加一按固定频率变化的相位差时，其干涉条纹的光强将随之交变，即为相位调制干涉。
A pulse frequency modulation (PFM) circuit for retinal prosthesis, which generates electrical pulses with frequency proportional to the intensity of incident light, is presented.
提出了一种用于视网膜修复的脉冲频率调制电路结构。
It operates both in current mode at high output load and in pulse frequency modulation (PFM) at light load to reduce the power dissipation.
它在重载下工作于电流控制模式，轻载下工作于脉冲频率调制(PF M)模式来降低功耗。
Modulation of light refers to changing parameters of light wave such as amplitude, intensity, and phase, frequency, polarization, etc. to make it carry message.
光辐射的调制是指改变光波振幅、强度、相位或频率、偏振等参数使之携带信息的过程。
This sensor featuring plane-convex lens collimator for expanding beam and coupling, and a low frequency for light pulse modulation is introduced.
利用平-凸透镜准直器作扩束耦合光学系统，采用低频斩光器实现光调制。
Quantum well laser diodes are of high modulation frequency response. They can be used as light sources and be directly modulated for high bit rate optical communications.
量子阱激光器具有良好的小信号调制频率响应，能作为高速光通信光源采用直接调制方式进行信号传输。
The high-frequency modulation reference light and the optical signal to be tested are reflected to the photoelectric sensor by a semi-permeable semi-reflector.
高频调制参考光和被测光信号是通过半透半反光镜照 射到光电传感器上。
Using ultraviolet fluorescent lamp as the light source, combining frequency modulation and demodulation technology can achieve a UV communication system with low date rates.
以紫外荧光灯为光源，结合调频和鉴频技术可实现低速率下的紫外通信。
Using ultraviolet fluorescent lamp as the light source, combining frequency modulation and demodulation technology can achieve a UV communication system with low date rates.
以紫外荧光灯为光源，结合调频和鉴频技术可实现低速率下的紫外通信。
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