Four novel microoptics gratings made in the Information Optics Lab in Shanghai Institute of Optics and Fine Mechanics

摘要

In this paper, we summarized four novel microoptics gratings that have been made in Information Optics Lab in Shanghai Institute of Optics and Fine Mechanics. This first is the hexagonal grating for hexagonal array illumination based on the fractional Talbot effect, which is reported in Optics Letters 27, p.228 (2002). The second is the double layered computer generated hologram reported in Optics Letters 28, p.1513 (2003). This device could achieve dynamic optical functions by shifting or changing spatial light modulator in one layer for addressing the selected function in another layer. The third is the circular Dammann grating reported in Optics Letterrs 28, p.2174 (2003), which can generate the circular intensity at various orders in the far field. The fourth is the superresolution phase element reported in Optics Communications 228, p. 271(2003), which achieves the 0.8 compression ratio of the central diffraction spot compared with the usual Airy spot. This result is meaningful for confocal microscopy, and free-space laser communication, etc.. In summary, these novel microoptical elements should be interesting for a variety of practical applications.