| 摘要 |
<p>PURPOSE:To easily obtain a uniform line light source according to a method wherein terminal beam is applied to an electron beam control electrode including a phosphor body through two slits from the line-like hot negative electrode of a line light source means for a printer. CONSTITUTION:Stripe-like electron beam control electrodes are arranged on the surface of a light emitting plate 4 at a constant interval. An electron beam taking out electrode 7 has a slit 8 along the longitudinal direction of a line-like hot negative electrode 3. An accelerating electrode 9 having a slit 10 similarly to the electrode 7 is arranged to be parallel to the electrode 7 so as to make the slit 8 to correspond to the slit 10. A convergence electrode 12 is mounted on the opposing surface of an insulating base plate 11 holding a gap between the electrodes 7 and 9. When a positive voltage is applied to the 3, negative electrode voltage is applied to and positive electrode is applied to the electrodes 12 electrode 5, a phosphor body b emits a light, and a line-like light source can be obtained. As described above, since the electron beam is radiated by one line-like hot negative electrode and is controlled, a light can be stably emitted, and the full quantity of light capable of exposing a photosensitive drum to light can be obtained.</p> |
