| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical pickup which enables efficiently outputting light using the proximity field optical effect of the light and further efficiently detecting the light. SOLUTION: This optical pickup is provided with a planar probe array 1 which collects a laser beam L from a light source on an optical recording medium and detects a signal beam from the optical recording medium and the planar probe array 1 has one micro-opening 5 or more having a diameter of <= wavelength of the beam and one photodetector 6 or more for detecting the signal beam from the optical recording medium on the same substrate 2. This optical pickup is further provided with an optical element 7 which collects an incident laser beam from the light source on the micro-opening 5, an optical element 8 which collects the signal beam from the optical recording medium on the photodetector 6 and an optical element 9 for separating the incident laser beam and the signal beam and, therefore, can detect the signal beam efficiently and stably without almost being influenced by the deviation of optical axis, etc. |
