{HEAD ~ A rotating polygon mirror driving apparatus} 1, wherein {TAIL ~ said bearing} is a dynamic pressure fluid bearing having a herringbone groove formed in one of said rotational shaft and said bearing sleeve for generating dynamic pressure 
wherein
{ HEAD ~ A rotating polygon mirror driving apparatus } 1 , wherein { TAIL ~ said bearing } is a dynamic pressure fluid bearing having a herringbone groove formed in one of said rotational shaft and said bearing sleeve for generating dynamic pressure
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH