Numerical simulation of residual stress and birefringence in the precision injection molding of plastic microlens arrays

Can Weng, Wing Bun Lee, Suet To, Bing yan Jiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)


Microlens arrays are critical components in the assembly of display devices used in various telecommunication products. The optical quality of these plastic lenses is very sensitive to the presence of residual stress. In this paper the distribution of residual stress and birefringence of these microlens arrays has been investigated. It is found that maximum residual stress always occurs in the regions near the gate. The predicted trends and patterns of the residual stress and birefringence distribution agree well with the experimental results. The effects of six main processing parameters on maximum value of residual stress are studied. The noticeable discrepancy between the simulation and the experimental results are discussed. Crown
Original languageEnglish
Pages (from-to)213-219
Number of pages7
JournalInternational Communications in Heat and Mass Transfer
Issue number3
Publication statusPublished - 1 Mar 2009


  • Microlens array
  • Numerical simulation
  • Precision injection molding
  • Residual stress and birefringence

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

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