| 摘要: | 玻璃具有高透光性、耐磨損、耐高溫與高化學穩定性等諸多優點，應用相當廣泛。為滿足更多應用需求，3D或曲面玻璃的製作技術也愈受重視。作為可彎曲玻璃技術之一的雷射彎曲已於2008年由吳東江先生及其團隊驗證其可行性，文獻顯示使用二氧化碳雷射(CO2 laser)可在厚度為150 µm、寬度為10 mm的薄玻璃上完成最大24°的彎曲角。雖然可行性獲得證實，但此後並無其他以雷射彎曲玻璃的成果報導，顯然雷射玻璃彎曲技術仍有諸多問題待克服：如何在厚度與寬度較大的玻璃上進行角度較大的彎曲是主要的挑戰。本研究先採用與文獻相同的掃描策略，但有別於使用CO2雷射，以近紅外光(Near-infrared, NIR)、連續式雷射(CW-laser)對不同厚度及寬度的鈉鈣玻璃(Soda-lime glass)及硼矽酸鹽玻璃(Borosilicate glass)進行雷射彎曲，成功地在厚度為550 m的鈉鈣玻璃及1000 m的硼矽酸鹽玻璃上完成了30°、60°與90°三種角度的彎曲。本研究同時提出一種新的掃描策略，此法成功地直接彎曲厚度1 mm、寬度13 mm的硼矽酸鹽玻璃，且改善彎曲處永久性材料堆積的問題，在30°的彎曲角下，彎曲處的厚度增幅僅有約10%。最後，為了進一步提高可彎曲玻璃的寬度，本研究提出了以雙雷射源同時掃描的策略，藉此改善雷射光在玻璃內傳播因能量衰減致使彎曲軸能量不均勻的問題，成功的彎曲了寬度為25 mm的玻璃。;Glass has many advantages such as high light transmission, wear resistance, high tempera-ture resistance and high chemical stability, and is widely used. In order to meet the needs of more applications, 3D or curved glass fabrication technology is also gaining more attention. One of the bendable glass technologies, laser bending, was demonstrated by Dongjiang Wu and his team in 2008, showing that a maximum bending angle of 24° could be achieved with a CO2 laser on thin glass of 150 µm thickness and 10 mm width. Although the feasibility was con-firmed, no other results on laser glass bending have been reported since then. It is clear that there are still many problems to overcome in laser glass bending: the main challenge is how to bend large angles on glass with large thickness and width. In this study, we first adopted the same scanning strategy as in the literature, but used a near-infrared (NIR), continuous laser (CW-laser) to bend soda-lime glass and borosilicate glass of different thicknesses and widths, instead of using a CO2 laser. In this study, three bending angles of 30°, 60° and 90° were suc-cessfully performed on soda-lime glass of 550 µm thickness and borosilicate glass of 1000 µm thickness. This study also proposes a new scanning strategy to bend borosilicate glass with a thickness of 1 mm and a width of 13 mm directly, and to improve the problem of permanent material accumulation at the bend, with only about 10% increase in thickness at 30° bend angle. Finally, in order to further improve the width of the bendable glass, a simultaneous scanning strategy with dual laser sources was proposed to improve the uneven energy of the bending axis due to the energy decay of laser light propagation in the glass, and a glass width of 25 mm was successfully bent. |
