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首页> 外文期刊>Applied optics >High efficiency pocket-size projector with a compact projection lens and a light emitting diode-based light source system
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High efficiency pocket-size projector with a compact projection lens and a light emitting diode-based light source system

机译：具有紧凑型投影镜头和基于发光二极管的光源系统的高效袖珍型投影仪

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摘要

We present a light emitting diode (LED)-based ultramini digital micromirror device projector with a size of 75 mm X 67 mm X 42 mm and a weight of 338 g. The LED illuminator inside this projector makes it possible to achieve a volume of 18 cm~(3) by using a dichroic filter and a collimating lens. The illumination system consists of high uniformity of 93percent through a microlens array as a homogenizer. A total internal reflection prism is also used to reduce the size of both the illumination system and the telecentric projection lens. A projection lens system with an ultrasmall track of 42 mm, including a high modulation transfer function value of 0.4 at 46.2 line pairs/mm, an optical distortion of only 0.25percent, and a television distortion of 0.01percent, is designed. Through the above superior specification, we can produce a 20in. (51 cm) color display comparable in brightness to a laptop with a contrast of 3700:1. The device is compact and suitable for personal use.
机译：我们提出了一种基于发光二极管（LED）的超小型数字微镜设备投影仪，其尺寸为75毫米X 67毫米X 42毫米，重量为338克。本投影机内部的LED照明器通过使用二向色滤镜和准直透镜可以实现18 cm〜（3）的体积。该照明系统由作为均化器的微透镜阵列组成，具有93％的高度均匀性。全内反射棱镜也用于减小照明系统和远心投影透镜的尺寸。设计了一种投影透镜系统，具有42 mm的超小轨道，包括在46.2线对/ mm处的0.4的高调制传递函数值，仅0.25％的光学畸变和0.01％的电视畸变。通过以上优越规格，我们可以生产出20英寸。 （51厘米）彩色显示器的亮度可媲美笔记本电脑，对比度为3700：1。该设备结构紧凑，适合个人使用。

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