| 摘要 |
A method of changing the state of a settable body 2 of material comprises embedding an optically conductive element 3 in the material, transmitting radiation along the conductive element and allowing the radiation to escape from said element into the settable material, thereby facilitating the change of state characterised in that the radiation is introduced into the optically conductive elements after penetrating through some of the material. The radiation may be directed onto a surface of the body and penetrate through the surface and into the optically conductive elements, which may be optical fibres that leak radiation along their length. The material may be a polymer in which chopped strands of optical fibre may be mixed and through which ultra violet (UV) radiation passes. In an alternative embodiment the strands can be longer (5 figure 2a) and woven into a mat (6 figure 2a) of fibres to allow radiation to pass between them. |
