An experimental study of light modulator using magnetic fluid

被引：32

作者：

Seo, JW ^{[1
]}

Park, SJ

Jang, KO

机构：

[1] Hongik Univ, Sch Elect & Elect Engn, Seoul 121791, South Korea

[2] Samwha Elect, R&D Lab, Kyoungki Do 445810, South Korea

来源：

JOURNAL OF APPLIED PHYSICS | 1999年 / 85卷 / 08期

关键词：

D O I：

10.1063/1.370003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A type of light modulator using light-absorbing magnetic fluid has been studied experimentally. The basic operation principle and design of the modulator are addressed. It is shown that the luminance of the device can be modulated by applying a moderate level of electric current to a light-reflecting metal electrode. A high contrast ratio comparable to that of printed material was obtained using a kerosene-base magnetite magnetic fluid with a saturation magnetization of 196 G and a thickness of around 20 mu m. Doubling of the luminance from a minimum level takes about 200 ms for a driving current of 80 mA. The operation speed of the cell was found to increase almost exponentially with driving current, suggesting the possibility of motion picture applications. (C) 1999 American Institute of Physics. [S0021-8979(99)43408-5].

引用

页码：5956 / 5958

页数：3