| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a diffraction optical element in which variation in element thickness is reduced. <P>SOLUTION: A diffraction optical element 100 includes a first optical member 10, a second optical member 20, and a third optical member 30 stacked in this order. A diffraction plane 40 including a plurality of protrusions 42 is formed at an interface between the first and second optical members 10 and 20. The third optical member 30 contacts at least one of the protrusions 42. <P>COPYRIGHT: (C)2013,JPO&INPIT |
