The　adoption　of　polarized　light　interference　demodulation　for　the　traditional　optical　voltage　transducer　to　detect　light　intensity　to　achieve　the　voltage　measurement　has　led　to　a　small　measurement　range　and　significant　influence　by　temperature　drift　and　crystal＇s　additional　birefringence.　This　paper　proposes　a　new　type　of　optical　voltage　transducer　based　on　convergent　polarized　light　interference,　with　the　crystal　electro-optical　phase　converted　to　the　spot　image＇s　rotation　angle.　This　new　methodology　is　independent　of　light　intensity,　has　wide　measurement　range　from　0°　to　180°,　and　its　voltage　measurement　range　is　not　restricted　by　crystal　half-wave　voltage.　A　detailed　analysis　is　made　on　the　theory　of　this　new　transducer　and　the　method　of　how　to　read　the　spot＇s　rotation　angle　is　given.　The　actual　measurement　results　are　also　presented　to　show　the　good　linearity　of　the　new　transducer＇s　sensing　angle　up　to　320°.　©　2014　State　Grid　Electric　Power　Research　Institute　Press.