| 摘要 |
The invention concerns a series of underwater vision articles comprising two optical elements (1, 3), two sealing elements placed in contact with the face via their right and left contact areas (2, 4), having the following characteristics: the optical elements are placed flatly on a plane on the side opposite the contact areas: P1, P2 represent respective points that are the lowest and to the furthest left from the inner edge (5) or outer edge (6) of the left contact area (4); P3, P4 represent respective points that are the lowest and the furthest right from the inner edge (7) or outer edge (8) of the right contact area (2). Independent of the size, the ratio between PP<SUB>2,4 </SUB>and PP<SUB>1,3 </SUB> is constant, and/or the ratio between, on the one hand, PP<SUB>2,4</SUB>and a constant and, on the other, PP<SUB>1,2 </SUB>is constant or PP<SUB>i,j </SUB>is the distance between P<SUB>i</SUB> and P<SUB>j</SUB> for any i and j. |
