Since　metallic　vapor　could　play　a　vital　role　in　the　post-arc　breakdown　which　directly　lead　to　a　failure　of　interruption,　it　is　of　importance　to　research　the　evolution　of　metallic　vapor　in　the　gap　near　current　zero　for　better　understanding　of　the　post-arc　phenomena　in　a　vacuum　interrupter.　In　this　work,　the　technique　of　planar　laser-induced　fluorescence(PLIF)　is　adopted　for　measuring　the　2-D　map　of　copper　vapor　distribution　between　a　pair　of　copper　contacts.　By　varying　the　probing　timing　of　laser　sheet,　the　evolution　process　of　copper　vapor　near　current　zero　is　obtained.　It　is　found　that　when　vacuum　arc　operates　in　the　anode　spot　mode,　though　after　current　zero,　there　still　exists　intense　evaporation　process　from　melted　anode.　The　density　of　evaporated　metallic　vapor　near　anode　at　current　zero　is　about　6×　1018m-3　after　calibration.　©　2018　IEEE.