光的合成与色散演示仪——LED光照明控制系统  

A Demonstrator for Light Synthesis and Dispersion——LED Light Illumination Control System

作　　者：陈晓媚[1] 彭力[1] 

机构地区：[1]华南师范大学,广东广州510006

出　　处：《大学物理实验》2017年第5期26-30,共5页Physical Experiment of College

摘　　要：装置为光的合成与色散演示仪。通过调制单片机输出脉冲的占空比可以控制三色LED灯红光、绿光及蓝光的输出亮度,从而合成不同的颜色,相当于模拟电脑系统中的24位真彩色颜色输出。利用凸透镜将光聚焦在白屏上以观察到不同颜色光的合成;用透射光栅代替凸透镜,可以演示光的色散现象。装置可以演示纯色输出、两色等比例输出以及三色等比例输出的合成与色散,同时也可以演示不等比例的输出,调节不同颜色单色光的亮度从而合成其他颜色。可以用于课堂演示教学,是一个简易而有效的教具。This device is a synthesis and dispersion demonstration instrument of light.We can adjust output pulse duty cycle through the MCU to change the brightness of the red,green and blue light to get output of various color lights,which is equivalent to 24 kinds of true color in the computer simulation system.Convex lens is used to focus light on the white screen for observation of light synthesis, and we can replace the convex lens with transmission grating,demonstrating the dispersion of light. As a result, solid color output, two-color proportional output, synthesis and dispersion, trichromatic proportional output synthesis and dispersion can be demonstrated.At the same time, it can demonstrate the output of different proportion, adjusting the brightness of different colors,so as to synthesize other colors,which is a simple and effective teaching aid for classroom demonstration teaching.

关 键 词：光 合成 色散 

分 类 号：O432.3[机械工程—光学工程]