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Kazuyoshi Nagao Patents |
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Inventor: Nagao; Kazuyoshi
Address: Yokohama, JP
No. of patents: 2
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5032000 |
Gradient index-type optical device and process for production thereof |
July 16, 1991 |
| A gradient index-type optical device produced by the ion exchange process, comprising: a transparent dielectric body having a refractive index distribution, and a refractive index distribution-adjusting portion disposed on at least a part of the transparent dielectric body. Because of |
| 4946724 |
Vitreous film and heat-mode optical recording medium using same |
August 7, 1990 |
| A vitreous film containing, e.g., 30-90 wt. % of Sn, 1-20 wt. % of P, 0.1-20 wt. % of Pb, 2-30 wt. % of 0 and 5-35 wt. % of F is formed by vapor deposition on a substrate such as glass, metal, plastic or ceramic. A light-absorbing substance can be incorporated in the vitreous film to |
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