Patent ID: 6472810
Filing Date: 2002-10-29
Classification: H01J

Abstract:
A light source device incorporated in an exposure apparatus for use in manufacturing cathode ray tube panel, said light source device comprising:a light source; a light source housing configured to hold said light source therein; an optical window configured to cause light from said light source to emerge into the atmosphere; an optical window retainer configured to fix said optical window to said light source housing; and a shielding plate placed over said optical window and said optical window retainer and having an opening wall surface extending inwardly beyond an opening wall surface of said optical window retainer to a position overlying said optical window, wherein an upper surface edge portion of said opening wall surface of said shielding plate is positioned in a region including and outside an optical path of outgoing light emerging from said optical window into said atmosphere at a predetermined angle, and wherein said optical window retainer is positioned in a region including and outside a boundary line passing through a position of a lower surface edge portion of said opening wall surface of said shielding plate and having a line-symmetrical relation to said optical path of said outgoing light.