Optical pickup device and optical pickup system using the same

摘要

An optical pickup device includes an objective optical element (OBJ) through which light fluxes respectively with wavelengths »1, »2 and »3 pass and a divergent angle-converting element (OC) that causes light fluxes respectively with wavelengths »1, »2 and »3 to pass through and causes at least a light flux with wavelength »1 to emerge as a parallel light. A position of the divergent angle-converting element in the optical axis direction varies in the case of using the optical pickup apparatus depending on the occasion when a light flux with wavelength »1 or »2 passes through or on the occasion when a light flux with wavelength »3 passes through.