抄録
Recently, the demand to the diffractive optical elements is increasing with the developments in the micro fabrication technology. In this research, we created the diffractive optical elements with the use of the direct laser lithography system that has the feature of high-resolution drawing, high-speed drawing, and a high accuracy positioning system. Although it is difficult to draw to a large-sized substrate with electron-beam lithography system, since the direct laser lithography system makes it possible, production of the large diffractive optical elements is expected. Furthermore. 2 levels phase-type diffraction optical elements were produced by wet etching processing to the substrate, and comparison of the diffraction efficiency of the amplitude-type diffractive optical element and the phase-type diffractive optical element was discussed.
