Derivation of Shift Factor for the Optical Glass Using Viscosity Measurement
Derivation of Shift Factor for the Optical Glass Using Viscosity Measurement
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使用粘度测量推导光学玻璃的位移因子
DOI：
10.11395/jjsem.20.23
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
荒井 政大
中科院分区：
文献类型：
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作者：
伊藤 寛明;百田 大地;前岡 勇輝;藤原 光紘;荒井 政大
本研究采用平行板试验这一粘度测量技术来估算光学玻璃的漂移因子。与常规蠕变试验相比，该方法可以缩短测试时间。首先，根据位移历史计算变形速率，然后将其代入Gent方程来推导粘度。估算的粘度表明了粘弹性范围内的温度依赖性。此外，平行板试验得到的位移系数与静压蠕变试验得到的位移系数吻合较好。从而证实了平行板试验是推导光学玻璃漂移系数的一种有效方法。此外，在196~980N的测量载荷范围内，位移因子几乎相同。
In this study, the parallel plate test which is a kind of viscosity measurement technique was carried out to estimate the shift factor for optical glass. This method can reduce the measurement time in comparison to conventional creep test. First, deformation rates were calculated from histories of the displacement, which were then substituted in Gent’s equation for deriving the viscosities. The estimated viscosities indicated the temperature dependency in the viscoelastic range. Moreover, the shift factors obtained from parallel plate tests agreed well with those from static compression creep tests. Therefore, it was confirmed that the parallel plate test is an effective method for the derivation of shift factor for optical glass. In addition, the shift factors were almost same for measurement loads between 196 to 980 N.