| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the lens part of a goggle for swimming where transparency is kept without being misted for a long time. Ž<P>SOLUTION: In the lens A part of the swimming goggle, thermal radiation and conduction are reduced in a part between lens surfaces A1 and B1 under the conditions (vacuum, water, dry air) of a vessel (container) type structure in the lens part, thus reducing a temperature difference. Thus, misting is prevented to keep transparency. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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