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在国外一科技网站上看到的，感觉不错。简单翻译下给大家共享，人工翻译比较仓促，有疑惑的地方欢迎指出，去伪存真。
光照长度长达数英里的自制手电筒
发表者：Gregory Mone 发表于 01.29.2008 at 12:27 pm 0条评论
Ralf Ottow站在他的浴室前，面对着又一个清晨，同时他注意到眼前的太阳光斑。他的皮肤已经让他自制的手电筒照得难受——他没有涂抹防晒霜。
45岁的荷兰光学工程师从他8岁的时候就开始制作自己的手电筒，而这个他最近的作品，3800万烛光，the Maxablaster，更像是个恒星的缩影。起初，Ottow卸掉一个巨强的零售手电筒的配件，换上了水银弧光灯泡（不知道这样是否准确），这样就能利用气体空腔内相邻的电子产生超热的离子来造光。这样的结果就是更亮，更聚焦的光斑，同时也产生了更多的紫外线（来自阳光，早期测试的产物（这个我不明白是什么意思:Q ））。因此，他在添加了个特别设计的外套，一个平整小玻璃，用来阻止紫外线。
电力由45节电池提供，the Maxablaster 能在4英里之外呈现一个聚光点，并就在那么远照亮一个屋子。但Ottow从来不用这个手电筒照他的邻居。“遛狗时不能把它当火把，”他说，“它有可能会烧了你的狗。”
The H2Whoa Credo：DIY可能是危险的。
我们在出版前做了充分的讨论，但最终你的安全是你自己的事。一定要采取合适的预防措施，并遵守所有的法律和规定。
Maxblaster工作图解
内部情况
拍摄者：Paul Wootton
时间6个月，成本1800$
表现：很多手电筒的亮度很高，但Maxablaster具有更好的特性，因为使用了水银电弧灯，并有很好的聚焦特征。Ottow说有一次他照到了9英里之外的渡轮（严重怀疑中，9英里能不能看到，但也不排除人家带的有夜视功能的带测距的望远镜:L ）
电源：由于灯泡是为实验室设备设计，是使用插头的。所以，Ottow克服了难题将54块镍氢电池整在一起，为了稳定电流，他加装了镇流器。
安全：Ottow加装了一个组建用来阻挡紫外线（老外啰嗦了，一言蔽之），他还加装了机关，这样要开手电就得用钥匙才行。
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下面是英文原文
A hacked-together flashlight that can shine for miles
By Gregory Mone Posted 01.29.2008 at 12:27 pm 0 Comments
Ralf Ottow was standing in front of his bathroom mirror one morning when he noticed that his forehead was sunburned. He hadn’t been out tanning—his homemade flashlight had fried his skin.
The 45-year-old Dutch optics engineer has been building his own lights since he was eight, but his recent 38-million-candlepower creation, the Maxablaster, is more like a miniature star. To start, Ottow stripped out the innards of a powerful commercial flashlight and switched in a mercury arc bulb, which generates light by creating an ultra-hot plasma between two closely spaced electrodes inside the gas-filled central chamber of the lamp. That results in a brighter, more focused beam but also kicks out more ultraviolet light (hence the sunburn, a product of early testing). So he added a specially coated reflector and designed, ground, and coated a new glass window that would trap UV rays while still pumping out light.
Powered by a pack of 54 batteries, the Maxablaster can put a bright spot of light on a cloud four miles high and illuminate a house from just as far. But Ottow doesn’t use it to spook his neighbors. “It’s not a torch you’d walk your dog with,” he says. “It would probably cook your dog.”
The H2Whoa Credo: DIY can be dangerous.
We review all our projects before publishing them, but ultimately your safety is your responsibility. Always take proper safety precautions, and follow all laws and regulations.
How the Maxblaster Works
This hacked-together flashlight can shine for miles. See how inside
Inside the Maxblaster
Photo by Paul Wootton
Time: 6 months | Cost: $1,800
PERFORMANCE: Some flashlights pump out more light, but the Maxablaster has a much greater reach because the mercury arc lamp creates a tightly focused beam. Ottow says he once illuminated a ferry boat some nine miles away.
POWER: The bulb is typically used for lab equipment and is designed to run off an outlet, so Ottow had the difficult task of packing together 54 off-the-shelf nickel-metal-hydride batteries. To regulate the current, he added a ballast.
SAFETY: Ottow installed a strong glass window in case the pressure shatters the bulb and gave it an extra coating to block harmful UV rays. He also added a mechanism so the light needs a key to operate.
原文地址：http://www.popsci.com/diy/article/2008-01/handheld-sunbeam
[ 本帖最后由 gdsgds 于 2008-3-14 23:28 编辑 ] |
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