Birefringence distribution in magneto-optical disk substrate fabricated by injection compression molding

Shinill Kang, Jong Sung Kim, Hyun Kim

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


It is necessary to improve optical and mechanical properties in optical disk substrates as information storage devices with high storage density using short-wavelength lasers are being developed. Injection compression molding is regarded as the most suitable process to manufacture optical disk substrates with high dimensional accuracy, low residual stress, and superb optical properties. Polycarbonate magnetooptical disk substrates are fabricated by injection compression molding, and the birefringence, regarded as one of the most important optical properties for optical disk, is measured. The effects of various processing conditions on the development of birefringence distribution are examined experimentally. It is found that the values of the birefringence distribution are very sensitive to the mold wall temperature history. By controlling the compression process, the overall birefringence value can be reduced.

Original languageEnglish
Pages (from-to)689-694
Number of pages6
JournalOptical Engineering
Issue number3
Publication statusPublished - 2000 Mar

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)


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