รายละเอียดวารสารวิชาการ

  1. หน้าแรก
  2. รายชื่อนักวิจัย
  3. ฉัตรชัย พะวงษ์
  4. ข้อมูลวารสารวิชาการ

ชื่องานวิจัย ( Article Name)

Measurement of Phase Retardation in a Liquid Crystal Variable Wave Retarder Using a Polarizing Triangular Interferometer

บทคัดย่อ ( Abstract )

Precise and effective methods for the phase retardation measurement due to the induced birefringence via the electro-optic effect are important for the characterization of several optical materials [1]. The interferometric method is often used in this kind of work due to their high sensitivity [2,3]. In this study, the phase shift in a liquid crystal wave retarder introduced to the transmitted light beam is induced by an applied electric field across the liquid crystal. The phase retardations related to the change of liquid crystal birefringence and of path length are measured using a proposed polarizing triangular cyclic interferometer (pCTi). The pTCi phase modulation technique [4,5] provides precise and reliable measurements. In this paper, the report is organized as follows. The setup and its operation are described in the next section, followed by the formulas from which the signal processing is elaborated. The findings from the measured retardation are presented in the experimental results. Finally a brief summary is given in the last section of the paper.

เอกสารวิจัย ( Paper )

VIEW

ผู้เขียน ( Authors )

  • ฉัตรชัย พะวงษ์

ข้อมูลการเผยแพร่ ( Journal Infomation )