| 摘要 |
<P>PROBLEM TO BE SOLVED: To effectively suppress degradation in the resolution and picture quality of an image written in a display recording medium. <P>SOLUTION: An optical writing device is provided, which outputs image light to be recorded to a display recording medium, and includes a spatial light modulating element and an optical element. The optical element has a two-dimensional periodic structure in which transparent layers transmitting the image light and light absorbing layers regulating a range of the emitting direction of the image light transmitting the transparent layer are alternately arranged in a repeated manner. The two-dimensional periodic structure includes a plurality of periodic structure sections sectioned along a direction perpendicular to the direction along which the transparent layers and the light absorption layers are alternately arranged in a repeated manner. At least part of the plurality of periodic structure sections has a periodic structure in which the transparent layers and the light absorption layers are alternately and repeatedly arranged by varying phases of spatial frequencies of the transparent layers neighboring in the orthogonal direction. Repeated period pitches of the transparent layers and the light absorption layers in the two orthogonal directions of the two-dimensional periodic structure are set to match with each other, and the repeated period pitches are set to be narrower than a layout pitch of the pixels of the spatial light modulating element. <P>COPYRIGHT: (C)2011,JPO&INPIT |
