Half a croissant, on a plate, with a sign in front of it saying '50c'
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LCD Infrared bar code film

 Place film between LCD screen and infrared bar code reader
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Make a standard grocery store IR bar code reader work with a bar code on a LCD display. A film that could be put in between the scanner and the LCD display that would modify the laser's diffusion enough to make the technologies usable together.
—clamwich, Oct 16 2009

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       Could you provide a few more clues? Why is it currently not possible to hold a LCD-generated barcode up to the scanner? Is the pixelation a problem?
—loonquawl, Oct 16 2009
   

       I'm calling shenanigans. An infrared barcode reader?   

       There's nothing stopping a standard (laser-based) barcode reader from reading a barcode on a display.
—phoenix, Oct 16 2009
   

       yahbut why ? if you've an LCD screen showing a barcode, then you have an electronic instrument that can be directly plugged in to the reader side.
—FlyingToaster, Oct 16 2009
   

       (you might be testing either barcode generating software or a barcode reader)
—phoenix, Oct 16 2009
   


 

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