Scala how to instantiate new Option[java.sql.Date] type

I have var date_of_birth2 : Option[java.sql.Date] = None.

Later I have to fill date_of_birth2 by string.

 String date = "01/01/1990"
 var formate = new SimpleDateFormat("dd/MM/yyyy").parse(date)
 var aDate = new java.sql.Date(formate.getTime()); 

But aDate is just the type of java.sql.Date. How can I assign?

var mdate_of_birth2 : Option[java.sql.Date] = date // date is just String type