| 摘要 |
PURPOSE:To make one lamp usable for two purposes by sticking a reflective film onto the inner surface of a glass tube while leaving a main opening and a sub-opening, both of which have fixed angles within the glass tube, and also adhering a fluorescent film onto the reflective film and the sub-opening. CONSTITUTION:While rare gas and mercury are filled in a glass tube 1 with electrodes 2 at its both ends, a reflective film 5 is pasted onto the inner surface of the glass tube 1, with a main opening 3 having a fixed angle theta1 and a sub- opening 4 having an angle theta2 left, and a fluorescent film 6 is stuck onto the reflective film 5 and the sub-opening 4, thereby forming a reflextype fluorescent lamp for an optical equipment. Accordingly, light from the main opening 3 is used for illuminating a draft in such an optical equipment as a copying machine, while light from the sub-opening 4 can be utilized for other purposes such as nonelectrification of a photosensitive drum, with decline of light output from the main opening 3 being prevented. Thus, it is possible to make the lamp smaller and less electric power consuming. |
