ORGANIC HOLOGRAM ELEMENT, SEMICONDUCTOR LASER MODULE FOR OPTICAL PICKUP, AND METHOD FOR MANUFACTURING OPTICAL PICKUP AND ORGANIC HOLOGRAM ELEMENT

摘要

PROBLEM TO BE SOLVED: To improve inter-element uniformity of diffraction efficiency as an element by preventing grating falling of a recessed and projecting periodic structure from a substrate normal direction, which is caused at the time of filling a material into a recessed part of the recessed and projecting periodic structure.;SOLUTION: The grating falling of the recessed and projecting periodic structure from the substrate normal direction, which is caused at the time of filling a transparent material 8 into the recessed part of the recessed and projecting periodic structure constituting a first diffraction grating 4 is prevented by an engagement structure of a second diffraction grating 7 with the first diffraction grating 4. Thus, the inter-element uniformity of diffraction efficiency as an organic hologram element 1 can be improved, and consequently, element mass-productivity can be improved, elements can be produced with a high yield and element cost can be reduced by this mass-production effect.;COPYRIGHT: (C)2006,JPO&NCIPI