Carlson invented the photocopier, which of course finally ended up at Xerox. An important invention, to be sure, but not fundamental science like we're discussing here. I don't think any new physical principles were involved.
I remember his name mainly because I'm a stamp collector, and the U.S. issued a postage stamp honoring Carlson some years ago. When the stamp was announced, there was quite a bit of head-scratching. "Chester who
Remember Rutherford's remark about physics? Something like "All science is really physics; the rest is just stamp collecting." I belong to both APS's (American Physical Society and American Philatelic Society) so I guess I can claim to know everything!