| 摘要 |
<p>PURPOSE:To obtain an inexpensive optical information writing device of less illuminance variance by making adjacent images of optical information of LED elements coincident with each other to write optical information. CONSTITUTION:In an LED array 1, chips 2 are arranged in a line on a substrate 1a, and an LED element group 3 having a length WLL is provided on each chip 2. An aperture plate 5 having holes 5a is provided above light shielding members 4, and a gathering optical system 6 is provided on this aperture plate 5. The system 6 consists of a lens array 7 where plural lenses 7a having optical axes in centers of groups 3 are joined into one body. Optical information emitted from each group 3 is projected as an inverted actual image having a length WLL' onto an information carrier 8 above the system 6 by each lens 7a and at this time, a main beam 9 emitted from the element 3a placed in the end part of the group 3 and a main beam 10 emitted from the element 3b in the end part on the opposite side of the group 3 adjacent to this element 3a coincide with each other on the carrier 8.</p> |
