流媒体技术在远程教学系统中的应用(2)

• 作 者: 戴志良
• 出 处: 音响技术
• 发表日期: 2013年01期
• 关键词: 流媒体技术 远程教学系统 光线 摄像头 多次反射 光学式 触摸屏 线网 射出 区域 屏幕 间隙

2.5双CCD光学式触控屏(Dual CCD optial touch screen)双CCD光学屏采用安装在触摸屏顶部左、右两角各一台CCD摄像头,通过LED灯发射出光线,经过四周反射条反射,进入屏幕左、右上角的CCD摄像头中,密布的光线在触摸区域内形成一张光线网,经多次反射的光线间的间隙可在1mm以内,见图9。

2.5 Dual CCD optical touch screen (Dual CCD optial touch screen) Dual CCD optical screen installed on the top of the touch screen at the left and right corners of a CCD camera, through the LED lights emit light, reflected by the surrounding reflection bar, enter the screen In the CCD camera with the left and right upper corners, dense light forms a light net in the touch area, and the gap between the light reflected by multiple times can be within 1 mm, as shown in FIG. 9.