Patent ID: 7644596
Filing Date: 2010-01-12
Classification: F21V,H01J

Abstract:
1. A method of manufacturing a reflector which has a hollow neck portion which fixes an end of a lamp to an outside of the bottom of the reflector along an optical axis of the reflector, the method comprising: a molding process in which an inner mould and an outer mould are used, the inner mould forming an inner surface of the reflector and having a nipple at a point to form a dent in the direction of the hollow neck portion having a smooth slope from the bottom of the reflector, the outer mould forming an outer surface of the reflector and having a core projection facing the nipple of the inner mould to form the hollow neck portion, wherein a cavity formed between the outer mould and the inner mould is filled with glass by pressing a glass-gob placed in the outer mould, and forming a reflector body; a grinding process wherein the hollow neck portion is ground until a partition portion formed between the core projection of the outer mould and the nipple of the inner mould is around away so as to form an opening between the hollow neck portion and the inner surface of the reflector; and a reflective membrane covering process the reflector body is covered with a reflective membrane, wherein, during said grinding process, opening of the partition portion is carried out by grinding the inside of the hollow neck portion so that an inner diameter of a backside of the hollow neck portion becomes larger than an outer diameter of the nipple portion, wherein, after the partition portion is ground away, an area previously occupied by the ground away partition portion comprises at least a portion of the hollow neck portion.