Flowlight: Like a Blackboard With Lasers
Precisely how the Flowlight would work is a little unclear, but the design page notes that a base station would focus a laser beam 100 times a second into a point in the space, creating small plasma points that glow in mid air. Users could then use the pen to draw and write, making doodles look like some sort of fantastic light show. It’s kind of like a cross between and blackboard and a laser pointer—which would be extremely cool if the product actually existed.
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I have always thought this concept of focusing laser beams into a point into space could be used to create holograms of the highest grade.
I documented and proposed a concept like this in the late 1970’s using two or more lasers that converge at points in free space to mix wavelengths and generate light from the plasma effect – and of course continuously this could be formed into a raster of any dimension or depth within range / power of the lasers.
I hope these peope haven’t spent much on patents – as my docs were in the public domain way back then and thus prior-art exists.
Incidentally the laser proposal was the extension of a project called SQ/AR which did the same thing with phased audio projectors to create 3D soundfields.