>Kärna, which had invented an opto-mechanical encoding wheel that could track a mouse’s movements at 2000 dpi, far higher resolution than other mice at the time

>Kärna, which had invented an opto-mechanical encoding wheel that could track a mouse’s movements at 2000 dpi, far higher resolution than other mice at the time. http://www.dansdata.com/images/boomslang/bswheels480.jpg http://www.dansdata.com/images/boomslang/bswheels480.jpg Instead of quadrature encoding the disks are filled with little slopes and sensors seem to be taking analog readings. In 1999 it directly competed with optical IntelliMouse Explorer and imo didnt do a good job. The shape was a gimmick and unwieldy - designed purely by marketing (confirmed by Fitch PR material linked in another post here), not someone actually looking into ergonomics (IntelliMouse Optical shape prevails to this day as the go to for all gaming mice).