TEHNOLOGIJA 3D GRAVIRANJA UNUTAR KRISTALA TECHNOLOGY OF 3D ENGRAVING INSIDE THE CRYSTAL

Zvonimir Sabati, Andrija Bernik, Nenad Breslauer
2015 POLYTECHNIC & DESIGN   unpublished
1 Fakultet organizacije i informatike Varaždin 2 Sveučilište Sjever, Sveučilišni centar Varaždin 3 Međimursko veleučilište u Čakovcu Sažetak Lasersko graviranje unutar kristala (Sub-Surface Laser Engraving) dokazuje da je moguće spojiti u harmoniji umjetnost i tehnologiju, oživjeti blistavi kristal i istovremeno stvoriti jedinstveni dar, te je moguće zauvijek zabilježiti važan trenutak vremena u kristalu. Za tu namjenu danas se koriste laseri koji rade na 532nm s brzinom graviranja od najmanje
more » ... iranja od najmanje 120.000 točkica po minuti. Za dobivanje konačnog proizvoda važna je priprema modela ili tehnikom 3d modeliranja, obradom slika, teksturiranjem ili skeniranjem. Nije identična priprema za 3d ispis ili neku drugu namjenu kao i za lasersko graviranje. Tehnikom graviranja unutar kristala spaljuju se točkice promjera 0,02 do 0,08 mm na temperaturi od oko 20.000oC i lako se može dogoditi pucanje kristala zbog preklapanja ploha ili linija. Koriste se različiti algoritmi za horizontalno i vertikalno graviranje jer se točke graviranja razlikuju po obliku ovisno o prostornom smještaju unutar kristala. Posebno velike mogućnosti mogu biti kod rada s modelima koji unutar kristala nose niz skrivenih informacija koje se dobivaju različitim prostornim položajem elemenata istog modela ili različitih modela. U ovom radu će se pokazati upravo takve tehnike koje su nastale kao rezultat višegodišnjeg istraživanja i koje daju egzaktne rezultate. Abstract Laser engraving inside a crystal (Sub-Surface Laser Engraving) proves that it is possible to combine the harmony of art and technology, to revive the glittering crystal and simultaneously create a unique gift, as well as capture the important moment of time inside the crystal shape. Today, for this purpose, a lasers with 532nm precision are used with the speed of at least 120.000 dots per minute. Hi quality preparation of 3D model and its texture, existing 2D image or new scanning is required for creating and obtaining the very best quality of the final product. 3D printing and laser engraving process doesn't share identical preparation techniques. The process of engraving inside a crystal is based on burning dots with a diameter from 0.02 to 0.08 mm at a temperature of about 20.000°C. It is highly possible to get cracks or even break the crystal because of overlapping surfaces or lines in the preparation process. Various algorithms for both horizontally and vertically engraving were used because, the engraved point has a different shape depending on the physical position within the crystal. Great possibilities are available while working with the models that carries out a variety of hidden information, which are obtained by different spatial position of its own elements or even with the support of different models. This paper will show precisely these kinds of techniques that have emerged as a result of years of research and provides us with the exact results.
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