🚀 go-pugleaf

In article <15880016@hpfinote.HP.COM> maj@hpfinote.HP.COM (Mike Jassowski) writes:

>   speaking of removing the backing on LCDs and projecting light through
>   them. Has anybody tried to make a heads up display that way? Something
>   that could be fitted to a helmet or added to glasses. 
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>>  Heads up displays are useful because they are virtual images focused
>> at infinity.  You don't have to refocus your eyes when you look from a
>> distant object to the display, and can therefore read the information
>> faster.  Having a LCD a few inches from your face will be difficult to
>> even focus on, much less focus quickly.

   Putting the proper optics, properly focused, between the eyes and
   LCD screen would allow the image of the screen to be in focus and
   the screen to appear to be at infinity.  The ordinary use of a simple
   magnifying glass works in almost this fashion; for the suggested
   application, of course, you would want to use high quality optics
   instead of a simple magnifying glass, but the principle is the same.