Polarization conserving light bending prisms and optimized fresnel rhombs.

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Total internal reflection (TIR) is a fundamental optical phenomenon.
• Prisms are essential optical components for manipulating light paths and polarization.
• Achieving specific phase retardation with TIR prisms is crucial for various optical applications.

Purpose of the Study:

• To investigate prism designs that utilize total internal reflection for precise phase retardation.
• To present designs for two specific prisms that achieve a 90-degree light bend without altering polarization.
• To optimize the design of Fresnel rhombs for quarter-wave and half-wave retardation.

Main Methods:

• Theoretical analysis of light propagation through prisms employing total internal reflection.
• Design and simulation of prisms for specific phase retardation values (quarter-wave and half-wave).
• Consideration of practical effects such as beam divergence and prism material dispersion.

Main Results:

• Two prism designs are presented that successfully bend light by 90 degrees while preserving its polarization state.
• Optimized designs for Fresnel rhombs are derived for achieving quarter-wave and half-wave phase retardation.
• The impact of light beam divergence and prism dispersion on the performance of these optical elements is analyzed.

Conclusions:

• Prisms utilizing total internal reflection offer a viable method for achieving specific phase retardation.
• The presented Fresnel rhomb designs provide effective solutions for quarter-wave and half-wave retardation applications.
• Understanding the effects of beam divergence and dispersion is critical for the practical implementation of these TIR prisms.