High frequency heating apparatus for selective heating of a desired portion of an object

A high frequency heating apparatus comprising:

• a heating chamber operable to accommodate an object to be heated;
• an electromagnetic wave emission device operable to emit electromagnetic waves;
• a local heating device operable to focus the electromagnetic waves emitted from said electromagnetic wave emission device on a portion of the object;
• and
• a control device operable to control said local heating device and said electromagnetic wave emission device;
• wherein said control device is operable to control said local heating device to change at least one of a direction of radiation of the electromagnetic waves relative to the object and a position of the object relative to the direction of radiation of the electromagnetic waves, thereby determining the position of the object on which the electromagnetic waves are focused, and said control device also is operable to control said electromagnetic wave emission device to start and stop radiation of the electromagnetic waves, thereby selectively heating a desired portion of the object.