LIGHT SOURCE APPARATUS, ITS MANUFACTURING METHOD AND APPARATUS, REFLECTOR FOCAL POINT LOCATING METHOD AND APPARATUS, FOCAL POINT LOCATING LIGHT SOURCE, DISCHARGE LAMP EMITTION POSITION LOCATING METHOD AND APPARATUS, AND DISCHARGE LAMP-REFLETOR POSITIONING METHOD AND APPARATUS

摘要

The light emitted from a focal point locating light source (38) and reflected from a reflector (12) is projected onto a screen (341) and the projected image on the screen (341) is imaged by a focal point locating camera (35). With reference to the projected image, the focal point locating light source (38) is moved by means of a position adjusting system (37) so as to place the focal point locating light source (38) at the focal point of the reflector (12). The position of the placed focal position locating light source (38) is made the focal position of the reflector (12). Conventional measurement by means of a three-dimensional measurement instrument is unnecessary since the projected image on the screen (341) imaged by the focal point locating camera (35) is used so as to locate the focal point of the reflector (12), thereby improving the work efficiency.