back lighting 逆光照明 ; 背光照明 ; 背面光照
Diffuse Back Lighting 扩散式背光源
directional back lighting 方向性背向打光
Back Lighting Type 背光应用系列
back lighting photocell 背面照明光电管
iconoscope back lighting 光电摄象管背景光
back lighting light source system 背面照明光源系统
Purpose: General purpose switching and muting, LCD back-lighting, supply line switching circuits.
用途： 用于一般静音开关，液晶显示器的背景照明，线性开关电源。
Frequently it has a hinged glass cover to hold copy flat, and may have a removable section in which a transparency holder can be positioned for back-lighting illumination.
一般都备有铰链着的玻璃盖面，以把稿件夹平。有些更可以换上透明片架，在后面打灯照明。
Shooting someone in front of a window during the day can present bad back-lighting problems—the camera will expose for the bright window, leaving your subject underexposed and lost in shadow.
白天给一个站在窗户前的人照相可能会碰到反光问题。相机暴露在明亮的窗户前，使得人物曝光不足而出现阴影。
应用推荐