JPS4881389A - |
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| 申请号 | JP563073 | 申请日 | 1973-01-11 | 公开(公告)号 | JPS4881389A | 公开(公告)日 | 1973-10-31 |
| 申请人 | 发明人 | ||||||
| 摘要 | Lenses are provided having a central sight zone embracing the field of view and at least an upper shading or shielding zone of lower transmittance arcing around the clear central zone so as to provide shading from above and the sides. A further amount of shading may be provided below the clear portion. Shading and lower transmittance are most advantageously provided by louvered film. The lenses are particularly adapted for skiing goggles. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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