섬유

linear optical birefringence and dichroism measurement in liquids and colloidal dispersions

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 243
an apparatus is described for measuring the linear birefringence and linear dichroism induced in liquids or dispersions by an applied magnetic field. the apparatus uses a vibrating beam phase modulator and conventional optical and electro-optical components. it is capable of measuring $delta$ n $prime$ (the real part of the complex birefringence $delta$ n) down to about 10** $minus$ **1**2 and $delta$ n $double prime$ (the imaginary part of $delta$ n) down to about 10** $minus$ **1**0. results are given for liquids of very small cotton-mouton constant, hitherto unmeasurable, and very dilute colloidal dispersions. dust removal from sample liquids is shown to be of major importance for weakly birefringent or dichroic samples. 9 refs
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