| 摘要 |
<p>PURPOSE:To eliminate the restriction of a temperature due to the heat resistance of an incident lens and to execute a high input to a cathode ray by composing the incident lens of a liquid-cooled system cathode ray tube projector of a 4-methylpentene polymer. CONSTITUTION:For a coupling member 3, the cathode ray tube is fitted to a case body 1 through an O ring. A concave-shaped lens 4 is pressed and fitted by an external barrel 9 fixed with the coupling member 3 through an O ring 11, and a void is formed. Into the void, a coolant 10 is injected. To the coupling member 3, a hydraulic pressure compensating part 13 for compensating the hydraulic pressure of the coolant 10 is provided. The incident lens 4 is formed of the 4-methylpentane polymer. As the coolant 10, the mixed liquid of a distilled water and an ethylene glycol is used. Since the heat resistance of the incident lens is improved, the high input can be executed.</p> |
