光电鼠标 meaning in English

optical mouse

Study on visual positioning based on homography for indoor mobile robot
基于光电鼠标的移动机器人室内定位方法
Most optical mice have a resolution of 400 dpi ( dots per inch ) , meaning that without software compensation , the cursor will move 400 pixels across the screen for every inch the mouse is moved on the desktop
（大多数光电鼠标拥有400dpi的分辨率，意味着排除软件补偿的条件下，鼠标在桌面上每移动1英寸，其指针会在屏幕上移动400像素。