Created by: yuetingclaire
Number of Blossarys: 2
English (EN) Phase comparator is a frequency mixer, analog multiplier or logic circuit that generates a voltage signal which represents the difference in phase between two signal inputs.
所谓鉴相器是一个混频器或者模拟乘法器，它的输出是输入电压信号的乘积，其中包含了两个输入信号的相差信息。鉴相器是锁相环电路的一个关键部件。 相差检测在多种应用中均具有重要的作用，如电机控制，雷达与通信系统，伺服系统以及解调器等。
Optical coherence tomography (OCT) is an optical signal acquisition and processing method. It captures micrometer-resolution, three-dimensional images from within optical scattering media.
光学相干断层扫描是一种光学信号获取与处理的方式。它可以对光学散射介质如生物组织等进行扫描，获得的三维图像分辨率可以达到微米级。
A lens mount is an interface - mechanical and often also electrical - between a photographic camera body and a lens.
On a digital camera optical viewfinder is the eyepiece that you look through to frame and focus your subject before taking the picture.
Digital single-lens reflex cameras are digital cameras combining the parts of a single-lens reflex camera and a digital camera back, replacing the photographic film.
