| 摘要 |
Fastening arrangement for fastening accessories to ophtalmic devices, in particular spectacles, by means of permanent magnets. Permanent magnets which possess high magnetic characteristic values such as energy density and remanence are obtained by using alloys containing at least one rare earth element and/or cobalt and/or by making them magnetically anisotropic. This reduces the volume and weight of the permanent magnets, which can therefore be advantageously mounted in spectacle frames, while ensuring reliable fastening of the accessory. |
