| 摘要 |
PURPOSE:To obtain a body whose quality has been improved, by allowing a position in the array direction of each light emitting element in a second light receiving element column, to coincide with a position in the array direction of the second light shielding part provided between each light emitting element in a first light emitting element column. CONSTITUTION:A housing 51 has a partition wall 51b for shielding a light beam between both LED columns (a), (b), and the housing 51 shields a light beam in the periphery of both the LED columns and between both the LED columns. Between LEDs of each LED column, a partition plate 52 made of a synthetic resin is provided, respectively, and shields a light beam between each LED. By this housing 51 and the partition plate 52, a square cylindrical chamber for containing the LEDs 1-39 of both the LED columns is formed. That is, the position of the array direction of each LED of an even column is shifted from a position of the array direction of each LED of an odd column, and each LED of an even column is provided so that the position of the array direction coincides roughly with the position of the array direction of each partition plate 52 between each LED of an odd column. |
