Method of producing reflectors from glass or glass ceramics

A method of producing reflectors from glass or glass ceramics comprising the steps of:

• providing a mold comprising an upper mold part and a lower mold part defining a cavity inbetween and being movable relative to each other, said cavity having the shape of a reflector having a closed bottom and being open to the outside;
• placing a glass mass within said mold;
• molding a reflector at a temperature above the transformation temperature by moving at least one of said upper and lower molds against the other one of said upper and lower molds;
• providing a holder comprising an opening;
• placing said reflector within said opening of said holder;
• heating up said reflector in a region of its bottom;
• placing a die below said bottom of said reflector;
• lifting said bottom of said reflector by raising said die while supporting said bottom laterally on holding elements projecting from said die in upward direction;
• providing a plunger being movable against said bottom toward said die;
• and
• punching at least one opening into said bottom by moving said plunger toward said die into a matching opening provided within said die.