Patent ID: 8767302

Claim:
A laminated optical disk comprising: a first annular lens, having a center, a first light-input curved surface and a first light-output curved surface, wherein the first light-output curved surface faces the center, and the first light-input curved surface is disposed opposite to the first light-output curved surface; a second annular lens, surrounding outside of the first annular lens, wherein the first annular lens and the second annular lens are arranged in a concentric manner, the second annular lens has a second light-input curved surface and a second light-output curved surface, the second light-output curved surface faces the first light-input curved surface, the second light-input curved surface is disposed opposite to the second light-output curved surface; a base, connected to the underside of the first annular lens and the second annular lens, and providing a first horizontal plane, a second horizontal plane located below the first horizontal plane, and a third horizontal plane located below the second horizontal plane, wherein the first horizontal plane is connected to the first light-output curved surface, the second horizontal plane is connected between the first light-input curved surface and the second light-output curved surface, and the third horizontal plane is connected to the second light-input curved surface; and a circular light guiding unit, disposed at the center of the first annular lens, wherein the circular light guiding unit has an inverted conical hollow portion and an outer curved surface, wherein the outer curved surface is connected to the first horizontal plane, the inverted conical hollow portion has an inner sidewall opposite to the outer curved surface.