Basedonaclassofbipolarsequenceswithtwo-valuesautocorrelationfunctions,anewfamilyofbipolarsequencesisconstructedanditscorrelationspectrumiscalculated.ItisshownthatthenewfamilyisoptimalwithrespecttoWelch'sboundandisdifferentfromthesmallsetofKasamisequences,whilebothofthemhavethesamecorrelationproperties.