Theoretical analysis and fabrication technique of micro holographic Fresnel lens
- 物理技术－会议论文 
Theoretical analysis indicates that for micro holographic Fresnel lenses (MHFL s) with the same diameter, the spatial frequency of the interference fringes of the MHFL recorded with two spherical waves is higher than that recorded with a spherical wave and a plane wave. Therefore two-spherical-wave arrangement results in higher diffraction efficiency. Experimental results have verified the theoretical analysis. To obtain an MHFL with small diameter and high spatial frequency of interference fringes, lenses with large f-number are preferred in the recording geometry.