| 摘要 |
PURPOSE: To vividly transmit characters and graphics of a filter to the end part of an optical fiber bundle by raising the illuminance of light of the lamp and approximating the lamp and a filter and preventing the thrust end part of the optical fiber bundle and the filter from being deformed by the temperature rise and narrowing the gap between the thrust end part of the optical fiber bundle and the filter. CONSTITUTION: A lamp storage chamber 3 where a lamp housing 20 is stored, a first fan 7 which sends cooling air to the lamp storage chamber 3, and a second fan 9 which sends cooling air to a filter storage chamber 5 where a filter 4 and the end part of an optical fiber bundle 6 are stored are provided. A transparent guide plate 30 which guides a part of cooling air into the lamp housing 20 is provided between the lamp housing 20 and the filter 4, and a part of cooling air from first and second fans 7 and 9 is guided into the lamp housing 20 to cool the inside, and thereby, the heat radiated from the lamp 2 and the lamp housing 20 is reduced to prevent deformation due to the temperature rise. |
