| 摘要 |
<p>An underwater diving mask (10), including a preformed face piece (12) of suitable material so as to yieldably fit the contour of a wearer's face, and a strap (16) for holding the face piece (12) against the wearer's face. The mask (10) has a large opening (20) formed in the forward part thereof, and a rigid plate-like supporting structure (22) carried by the face piece closing the opening. A pair of lens systems (24) one for each eye of the user, are supported in side-by-side relationship by the supporting structure (22). Each lens system (24) consists of an individual equiconvex lens (26). So as to properly compensate for the foreshortening effect of the water, the magnifying power of the lens system is less than 1.75. Each lens may be integrally formed with the supporting structure (22), or a pair of equiconvex lenses may be affixed onto one surface of the supporting structure (22).</p> |
