透明弹性薄膜调节可见光透射比的试验研究

EXPERIMENTS OF THE TRANSPARENT ELASTIC FILMS FORADJUSTING THE TRANSMITTANCE OF VISIBLE LIGHT

总结了透明弹性薄膜调节可见光的研究试验。基本原理是当光通过凸凹不平的透明薄膜时,在薄膜表面要发生散射,散射能力大致与薄膜表面粗糙度成正比。当通过外力来改变薄膜表面的粗糙度时,就可以改变薄膜的散射比,也即改变了薄膜的直射透射比,从而对透射光强进行一定的调节。实验表明:采用适当硬度的透明弹性薄膜,在一个大气压条件下,薄膜的直射透射比的调节范围可从最小33%达到最大86 7%,透射比的改变时间不超过1秒。这一效果比目前所报道的电致变色调光的范围要大,速度要快,视觉效果也好的多,有一定的应用前景。

Adjusting the transmittance of visible light was preliminarily studied by the scattering of transparent elastic films. The scattering ability of the films is approximately proportional to its roughness. When the roughness of the film surface is changed by the external force, the scattered power of the film is changed, and the transmittance of the film is altered. The experiment indicates that the transmittance of the transparent elastic film is changed from 33% to 86.7% under atmospheric conditions, and the altering time of the transmittance is less than 1 second. The result is better than that by electrochromics in terms of adjustable range, speed and visual effect.