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A comment on Continuous 3D Printing Possible With Transparent Polygon Scanning?. Parent comment

Re:Continuous 3D Printing Possible With Transparent Polygon ... by hexa_storm on Monday August 05, 2019 @06:42PM (#20619945)
the rotating reflective polygon patent is this one https://patentimages.storage.googleapis.com/29/68/46/da50635... I think it is even more relevant but somehow it did not get posted.
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Re:Continuous 3D Printing Possible With Transparent Polygon ... by benjohnson on Monday August 05, 2019 @08:03PM (#20620635)
You'd think laser printers would be prior art - a rotating mirror (usually a hexagon) was exactly how older laser printers would scan across the drum to form out the print.
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Re:Continuous 3D Printing Possible With Transparent Polygon ... by hexa_storm on Monday August 05, 2019 @08:29PM (#20620801)
You have to specify application in a patent. Riken desribed it for 3D printing in 1997 see https://sffsymposium.engr.utexas.edu/Manuscripts/1997/1997-2.... but did not specify the use of laser diode as it was quite new at the time. It got only invented in 1996 by https://en.wikipedia.org/wiki/Shuji_Nakamura who got a patent for the laserdiode but little rewards and fought with his employer over it.
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