| 摘要 |
<p>PURPOSE:To improve the utilization efficiency of light emitted from a light emitting element by providing a reflection film on a tapered wall surface, reflecting a part of the light guided to each micropore by the reflection film and arranging a fine lens on a recording surface side corresponding to each micropore. CONSTITUTION:A micropore array plate 20 formed by one-dimensionally arranging many micropores 22 is provided between a light emitting element array 10 and the recording surface 2, and each micropore 22 and the light emitting element 12 are arranged to approximate or contact to each other to be opposed at 1:1, then the light from the light emitting element 12 is mostly guided to the micropore 22. The cross-section of the micropore 22 is formed to be tapered, and the reflection film 24 is provided on the wall surface. Then, the fine lens 25 is arranged on the recording surface 2 side corresponding to each micropore and the light projected from the surface of a substrate 21 is condensed on a position on the photosensitive surface 9 of a photosensitive drum. Thus, the light emitted from the element 12 in an obliquely lateral direction s guided to the photosensitive surface by the reflection surface 24 on the tapered side wall of the micropore pat 22 and the transmission efficiency of a light quantity is enhanced.</p> |
