塑料光学透镜的磁悬浮检测
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摘要
考虑传统的塑料透镜检测方法操作繁琐、耗时长,本文提出了一种针对小型塑料光学透镜的磁悬浮检测理论与方法,并设计制造出了相关检测装置。该方法利用磁场对顺磁溶液的磁化作用,将逆磁性被测样品(塑料透镜)在溶液中悬浮起来,通过观察透镜在装置中的高度、中心位置和平衡状态下与水平面的偏斜程度,检测透镜是否存在外观不完整和内部存在气泡等不均匀性的缺陷,并确定出透镜缺陷存在的位置。通过合格透镜、外形不完整透镜、内部存在气泡透镜和功能不合格透镜开展了多项实验研究来验证该方法的可行性与有效性。结果显示,该方法的检测精度高、灵敏度高、操作简便且适应性广,在0.5mm的测量误差下,密度的测量精度高达0.003g/cm3;对直径小于10mm的透镜,可检测出总体积在0.017mm3的内部气泡缺陷。提出的方法在塑料光学透镜的检测方面很有应用潜力。
Traditional detecting methods for plastic optical lenses are complicated to operate and very time-consuming.Therefore,a new detection method based on the magnetic levitation theory was proposed for a small plastic lens and a corresponding detection device was designed in this paper.With the detection method,the diamagnetic sample(plastic lens)in the magnetic field of paramagnetic solution was levitated by magnetizing the solution.By observing the height,the centre position and the deflection of the lens in the device,the appearance and interior homogeneity like shrinkage and internal porosity of the lens could be detected.Several experiments on the qualified lenses,the lenses with an incomplete appearance or with interior homogeneity and some of disqualified lenses were performed for verifying the feasibility of the proposed method.The experimental results show that the proposed method is precise sensitive,easy to operate and has wider application fields.The detecting accuracy for density reaches to 0.003g/cm3 under a millimeter scale.Moreover,the method detects the interior porosity of the lens with a diameter less than 10 mm and the sensitivity to the volume of the porosityreaches to 0.017mm3.The proposed method has great potential for plastic optical lens detection.
Traditional detecting methods for plastic optical lenses are complicated to operate and very time-consuming.Therefore,a new detection method based on the magnetic levitation theory was proposed for a small plastic lens and a corresponding detection device was designed in this paper.With the detection method,the diamagnetic sample(plastic lens)in the magnetic field of paramagnetic solution was levitated by magnetizing the solution.By observing the height,the centre position and the deflection of the lens in the device,the appearance and interior homogeneity like shrinkage and internal porosity of the lens could be detected.Several experiments on the qualified lenses,the lenses with an incomplete appearance or with interior homogeneity and some of disqualified lenses were performed for verifying the feasibility of the proposed method.The experimental results show that the proposed method is precise sensitive,easy to operate and has wider application fields.The detecting accuracy for density reaches to 0.003g/cm3 under a millimeter scale.Moreover,the method detects the interior porosity of the lens with a diameter less than 10 mm and the sensitivity to the volume of the porosityreaches to 0.017mm3.The proposed method has great potential for plastic optical lens detection.
引文
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[9]MIRICE K A,PHILLIPS S T,MACE C R.Magnetic levitation in the analysis of foods and water[J].Journal of Agricultural and Food Chemistry,2010,58(11):6565-6569.
[10]HENNEK J W,ALEX N,BALA S A,et al..Using magnetic levitation for non-destructive quality control of plastic parts[J].Advanced Materials,2015,27(9):1587-1592.
[11]MIRICA K A,SHEVKOPLYAS S S,PHILLIPS S T,et al..Measuring densities of solids and liquids using magnetic levitation:fundamentals[J].Journal of the American Chemical Society,2009,131(29):10049-10058.
[12]SUBRAMANIAM A B,YANG D,YU H D,et al..Noncontact orientation of objects in three-dimensional space using magnetic levitation[J].Proceedings of the National Academy of Sciences,2014,111(36):12980-12985.
[2]孙强,柳荣,朴仁官,等.塑料非球面透镜在头盔3D显示中的应用[J].光学精密工程,2005,14(1):47-52.SUN Q,LIU R,PIAO R G,et al..Application of plastic aspherical elements in head mounted 3Ddisplay[J].Opt.Precision Eng.,2005,14(1):47-52.(in Chinese)
[3]宋满仓,陈建勇.基于MoldFlow的塑料非球面透镜注压模浇注系统设计[J].模具制造,2013(5):52-56.SONG M C,CHENG J Y.Gating system design of injection compression mold for plastic aspheric lens based on mold flow[J].Die&Mould Manufacture,2013(5):52-56.(in Chinese)
[4]王晓梅.非球面塑料透镜模具设计及改进研究[J].模具工业,2015(2):1-3,24.WANG X M.Design and optimization of mould for plastic aspherical lens[J].Die&Mould Industry,2015(2):1-3,24.(in Chinese)
[5]付向文.基于图像识别的透镜瑕疵检测系统关键技术研究[D].沈阳:沈阳理工大学,2014.FU X W.Research of the Key Technology on Detection System of Lens Defect Based on Image Recognition[D].Shenyang:Shenyang Ligong University,2014.(in Chinese)
[6]陈钦芳,马臻,赵蒙,等.双胶合透镜法检测大相对孔径凸非球面透镜[J].光子学报,2014,43(3):98-102.CHEN Q F,MA ZH,ZHAO M,et al..Testing of large NA,convex aspheric lens with doublets[J].Acta Photonica Sinica,2014,43(3):98-102.(in Chinese)
[7]IKEZOE Y,HIROTA N,NAKAGAWA J,et al..Making water levitate[J].Nature,1998,393(6687):749-750.
[8]CATHERALL A T,EAVES L,KING P J,et al..Magnetic levitation:Floating gold in cryogenic oxygen[J].Nature,2003,422(16):579-579.
[9]MIRICE K A,PHILLIPS S T,MACE C R.Magnetic levitation in the analysis of foods and water[J].Journal of Agricultural and Food Chemistry,2010,58(11):6565-6569.
[10]HENNEK J W,ALEX N,BALA S A,et al..Using magnetic levitation for non-destructive quality control of plastic parts[J].Advanced Materials,2015,27(9):1587-1592.
[11]MIRICA K A,SHEVKOPLYAS S S,PHILLIPS S T,et al..Measuring densities of solids and liquids using magnetic levitation:fundamentals[J].Journal of the American Chemical Society,2009,131(29):10049-10058.
[12]SUBRAMANIAM A B,YANG D,YU H D,et al..Noncontact orientation of objects in three-dimensional space using magnetic levitation[J].Proceedings of the National Academy of Sciences,2014,111(36):12980-12985.