发明名称 SELECTIVE OPTICAL FILTER
摘要 A selective optical filter, intended to be placed before the eyes for protection and for improvement of vision, features a plurality of different light absorption zones comprising a central zone which is completely light permeable, or has low light absorption capability, a zone surrounding this central zone which is light permeable but has a relatively high light absorption capability, the said zone being included between the periphery of the central zone and a cone having its apex at the optical center of the eye and an included angle of between about 15 DEG and 30 DEG , and the outer periphery of the zone adjoining a further zone of low light absorption capability corresponding to the peripheral part of the retina.
申请公布号 GB1603751(A) 申请公布日期 1981.11.25
申请号 GB19780017382 申请日期 1978.05.03
申请人 CARREAU B;LOMBARD G 发明人
分类号 G02C7/10;(IPC1-7):G02C7/10;G02B5/20 主分类号 G02C7/10
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