| 摘要 |
PROBLEM TO BE SOLVED: To provide a plastic optical element which, while maintaining the present condition of the optical performance, is reduced in optical appearance defects and improved in mass-productivity, and an optical scanner having this and an image formation device equipped with this. SOLUTION: In a long-form plastic optical element A having brims 2a to the main scanning direction, the light effective portion 1a and part of the brims 2a are formed with the same insert 3. COPYRIGHT: (C)2006,JPO&NCIPI |
