Light+Pens

=Light pens=

Erin Nitz
Light pens work much in the same way that a stylist would on a touch screen/graphics tablet, or a mouse and are usually used as an alternative to one of these. It can be used to select items on the computer screen and draw on the screen. But light pens can achieve a higher level of accuracy than a mouse and they use different technology, it senses the slight changes in the light/dark balance on the screen then gives you a visible result. For this reason they are used by doctors and other specialists who need to perform with the highest degree of accuracy in their profession. They first came out in 1957, and since then have developed rapidly and is now even used in hospitals in operations, but the basic idea that it was designed with stays the same.



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