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Verification for transcription of spherical radius and prediction of birefringence in injection molding optical lens

Tae Soo Kwak, Hitoshi Ohmori
JKSPE 2005;22(6):55-60.
Published online: June 1, 2005
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This paper has been focused in developing of plastic lens with ultra-precision and low birefringence ability using by injection molding simulation tools. The simulation tools, 3D-Timom™ and Asu-Mold™ were applied to visualize indirectly the flow pattern of melted polymer enter the mould and the simulation results are verified as compared with the experimental results. Birefringence and polarized light generated in injection molding process was also calculated for each injection conditions and compared with .the pictures of experimented optical lens go through the polarized light plates device. A spherical radius of plastic optical lens transcribed from profile of mould core surface was measured to estimate the geometrical accuracy for the each injection conditions. It is confirmed that the simulation results about flow pattern and polarized light area coincided in experimental results. It is known that increasing in thickness shrinkage at center of lens, the spherical radius is larger from comparing the graph measured spherical radius and the thickness shrinkage at center of lens.

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Verification for transcription of spherical radius and prediction of birefringence in injection molding optical lens
J. Korean Soc. Precis. Eng.. 2005;22(6):55-60.   Published online June 1, 2005
Download Citation

Download a citation file in RIS format that can be imported by all major citation management software, including EndNote, ProCite, RefWorks, and Reference Manager.

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Verification for transcription of spherical radius and prediction of birefringence in injection molding optical lens
J. Korean Soc. Precis. Eng.. 2005;22(6):55-60.   Published online June 1, 2005
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