| 摘要 |
PCT No. PCT/JP91/00112 Sec. 371 Date Sep. 16, 1991 Sec. 102(e) Date Sep. 16, 1991 PCT Filed Jan. 30, 1991 PCT Pub. No. WO91/11806 PCT Pub. Date Aug. 8, 1991A magneto-optical recording and/or reproducing apparatus having a magnetic head and first and second optical systems for recording on and/or reproducing from first and second magneto-optical media. The first optical system has a first objective lens, and the second optical system has a second objective lens whose numerical aperture differs from that of the first objective lens. The magnetic head is arranged near the second objective lens. The first and second optical systems are arranged such that the respective one of the first and second magneto-optical media which is currently being subject to recording or reproducing is positioned between the first and second optical systems.
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