| 摘要 |
PURPOSE:To put a marking in a transparent or translucent resin body by a simple process. CONSTITUTION:The inside of a transparent or translucent resin body 10 is convergently irradiated with a YAG laser beam LA from the side of a marking face 10a. The resin near the light converging position is decomposed, the resin body 10 is scanned by the YAG laser beam LA such that a decomposed part CR of the resin viewing from the side of the marking face 10a draws a desired pattern, and the pattern is marked in the inside of the resin body 10. The YAG laser beam LA has a wavelength of about 1.06mum and passes through the transparent or translucent resin body 10. However, as the laser energy converges near to the light converging (focus) position, the resin as a non-crystal body is decomposed so as to generate cracks which look like scattered small gold or silver foils. These cracks or decomposed parts are distributed along the optical axis of the YAG laser beam LA used for the convergent beam irradiation. |
