Schlieren effect in Amici prisms

Area of Science:

• Optics and Photonics
• Image Processing

Background:

• Spatial filtering is crucial for image analysis and manipulation.
• Conventional methods often require complex setups for phase and amplitude control.

Purpose of the Study:

• To investigate a simple optical system for spatial filtering.
• To demonstrate the generation of multiple distinct image types from a single setup.

Main Methods:

• Utilized a system comprising a polarizer, Amici prism, and analyzer.
• Analyzed the system's performance with collimated incident beams.
• Extended the analysis to beams with small convergence.

Main Results:

• The system functions as a phase and amplitude spatial filter.
• Successfully produced four distinct images: complementary Schlieren/Foucault, phase-edge, and bright field.
• Validated the theoretical analysis through experimental results.

Conclusions:

• The polarizer-Amici prism-analyzer system offers a versatile approach to spatial filtering.
• The system's ability to generate diverse image types has potential applications in optical testing and imaging.