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Quantitatively measurement and analysis of residual stresses in molded aspherical glass lenses

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Abstract

Residual stresses are important criteria for evaluating precision compression molded glass lenses. In this research, residual stresses inside a molded aspherical glass lens were investigated using both experimental and numerical methods. Specifically, residual stresses were calculated from optical measurements obtained by the use of a circular polariscope. From the measurements, both the magnitude and distribution of residual stresses in the aspherical glass lens were obtained. The residual stresses were also calculated using the structural relaxation model implemented in the finite element method software, and the results were compared to the measurements in experiments that were performed using matching molding conditions. In addition, residual stresses under different cooling rates were investigated in simulation and the impact of the cooling rate on the aspherical surface deviation was also discussed.

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Authors and Affiliations

  1. College of Machinery and Automation, Wuhan University of Science and Technology, Wuhan, Hubei, 430081, China

    Bo Tao

  2. Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230026, China

    Bo Tao & Lianguan Shen

  3. Department of Integrated Systems Engineering, The Ohio State University, 210 Baker Systems Engineering, 1971 Neil Avenue, Columbus, OH, 43210, USA

    Bo Tao, Peng He & Allen Yi

Authors
  1. Bo Tao
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  2. Peng He
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  3. Lianguan Shen
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  4. Allen Yi
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Correspondence to Allen Yi.

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Tao, B., He, P., Shen, L. et al. Quantitatively measurement and analysis of residual stresses in molded aspherical glass lenses. Int J Adv Manuf Technol 74, 1167–1174 (2014). https://doi.org/10.1007/s00170-014-6058-2

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  • DOI: https://doi.org/10.1007/s00170-014-6058-2

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