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標題: 高色散玻璃材質的模造特性對光學鏡頭設計的影響
Effect of molding characteristics of high dispersion glass material for optical lens design
作者: 林英瀚
Lin, In-Han
關鍵字: glass molding;玻璃模造;high dispersion coefficient;thermal expansion;fracture;高色散係數;熱膨脹;破裂
出版社: 機械工程學系所
引用: ﹝1﹞Yang Chen,et al.“Numerical simulation and experimental study of residual stresses in compression molding of precision glass optical components,”Journal of manufacturing science and engineering 130[5], 121-129(2008). ﹝2﹞Anurag Jain,et al.“Viscosity measurement by cylindrical compression for numerical modeling of precision lens molding process,”Journal of the American ceramic society 88 [3],2409 -2414(2005). ﹝3﹞Lijuan Su,et al.“Refraction index variation in compression molding of precision glass optical components,”Applied optics,1662-1667(2008). ﹝4﹞高正雄,“透鏡、稜鏡研磨工藝,”復漢出版社(2001)。 ﹝5﹞ ﹝6﹞A.K.Varshneya,”The viscosity of glass,”Fundamentals of Inorganic glasses,194-195(1994). ﹝7﹞連世暢,“潤濕角對模造玻璃成型機制之探討,”碩士論文,國立臺灣科技大學(2008)。 ﹝8﹞黃建溢,“光學玻璃球面透鏡熱壓成形研究,”碩士論文,國立交通大學(2003)。 ﹝9﹞王崴,“模造成型之光學鏡片直接加熱研究,”碩士論文,國立臺灣科技大學(2007)。 ﹝10﹞王嘉偉,“光學玻璃透鏡之熱壓成型研究,”碩士論文,國立交通大學(2005)。 ﹝11﹞Jiwang Yan,et al.“Modeling high-temperature glass molding process by coupling heat transfer and viscous deformation analysis,”Journal of Precision Engineering 33[2],150-159 (2008). ﹝12﹞Yu-chung Tsai, et al.“Glass material model for the forming stage of the glass molding process,”Journal of materials processing technology 201[1-3],751-754(2008). ﹝13﹞Jiwang Yan,et al.“Molding high-temperature glass molding process by coupling heat transfer and viscous deformation analysis,”Precision Engineering 33[2],150-159(2009). ﹝14﹞Anurag Jain, et al. “Numerical Molding of viscoelastic stress relaxation during glass lens forming process,” Journal of the American ceramic society 88[3],530-535(2005). ﹝15﹞高正雄,“透鏡設計理論應用,”復漢出版社(2001)。 ﹝16﹞訊技科技股份有限公司,“光學設計程式使用手冊,”(2003)。

In this paper, we describe the effect of the high-dispersion coefficient glass material (S-FPL51) on the lens thickness and its application to the optical lens design, while using the molding technology to manufacture lenses. With the result, the optimized optical system can satisfy the required specifications and meet the fabrication demands.
The study also investigates the manufacturing process characteristics of this high-dispersion coefficient material via the simulated lens shape. The experiment shows that the manufactured lens results in fracture between the junction of the curvature and plane. To decrease the stress, the chamfer of the junction between curvature and plane was raised up to 0.5, but the fracture still existed. Considering the time of stable temperature, it was increased from 100 seconds to 240 seconds, but the fracture also could not be eliminated through varying time extension. The rate of cooling was changed from 0.57℃/sec. to 0.32℃/sec., but the fracture could not be eliminated by slower and smaller cooling rate as well. If using smaller heat-expansion coefficient glass material to shape the same lens, there would no fracture occurred. This result demonstrates that the larger heat-expansion coefficient glass will lead fracture, especially for thinner lenses. Accordingly, the lens shows no fracture when increasing the thickness up to 5.0 mm. Due to the larger expansion coefficient of the material and the stress produced by temperature difference existing between the inner and outer parts, the thinner lenses trend to present fracture. Consequently, increasing lens thickness could avoid the fracture occurred by uneven stress. In conclusion, considering the thickness parameter for optimal simulation to devise the manufacturable lens makes the lens thicker and the total length of the system increasing up to 2.6 mm.
其他識別: U0005-1908201020581700
Appears in Collections:機械工程學系所

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