Differential interference contrast imaging using a pair of twisted nematic cells

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Nematic liquid crystals act as optically uniaxial crystals, with their optical axis aligning with molecular orientation.
• Applied electric fields induce lateral light shear in liquid crystals, dependent on molecular inclination angle.
• While potentially degrading display image quality, this electrical tunability is valuable for differential interference contrast (DIC) imaging.

Purpose of the Study:

• To investigate the use of twisted nematic (TN) cells as a replacement for traditional prisms in DIC imaging.
• To explore the unique optical properties of TN cells for DIC applications.

Main Methods:

• A pair of twisted nematic (TN) cells was employed for DIC imaging.
• The optical properties of the TN cells were analyzed in the context of DIC.

Main Results:

• The study demonstrates the feasibility of using TN cells for DIC imaging.
• The precise electrical tunability of lateral shear distance was confirmed.

Conclusions:

• Twisted nematic cells present a viable alternative to conventional DIC prisms.
• The electrical control over optical properties makes TN cells promising for advanced DIC imaging techniques.