Mini Disc Optical Pickup Integrated with a Birefringence Wedge and a Holographic Optical Element

Abstract

The near edge structure of the electron energy loss spectra (ELNES) of copper and gold clusters containing up to 923 atoms are theoretically studied with the multiple scattering approach in the framework of density functional theory. Calculations are performed both in the atomic sphere approximation (ASA) and in the full potential (FP) framework and their results compared. The effects of structure relaxation of the clusters on the ELNES are assessed. Finally an example of the ELNES of a Cu-Ag core shell nanocrystal is given.

Miniaturized Integrated Optical Pickup for Mini Disc

“…And twin-spot method is used for RES (Radial Error Signal) detection. But using such a compound prism hinders miniaturizing a pickup, and twin-spot method needs an adjustment by rotating the integrated unit (1). In this paper, we propose the new integrated MD optical pickup using polarized holograms, and PS-DPP (Phase-Shift Differential Push-Pull) (2) method for RES detection.…”