| 摘要 |
<p>This invention is directed to a method for producing an optical product, such as a protective lens of a mobile phone, in which production process a planar disc preform (2) is moved, carried from an area around a centre hole, from a working phase to another, in which working phases e.g. metallisation of frames and printing of logos is achieved into the disc preform, and in which method an orientation notch (9) is achieved into the disc preform, by which orientation notch the disc preform can be correctly aligned in each required working place for a procedure which takes place at the working phase. The orientation notch (9) is cut to the disc preform (2) by e.g. punching a small part away in such a way that a notch is formed, into which an orientation tongue can be oriented for aligning the disc preform at work stations.</p> |
