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US4509161A Optically readable information disc provided with a reflective optical structure 失效
具有反射光学结构的光学可读信息盘

Optically readable information disc provided with a reflective optical
structure
摘要:
An optically readable information disc having a reflective optical structure which comprises a reflective layer which is composed of a nitride, carbide or boride of a transition metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, chromium, niobium, molybdenum, lanthanum, tantalum and tungsten.
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