Single-volume dual-channel acousto-optical tunable filter

Area of Science:

• Optics
• Imaging Science
• Acousto-optics

Background:

• Spectral stereoscopic imaging requires precise filtration of light beams.
• Conventional methods often involve complex optical setups and large crystal components.

Purpose of the Study:

• To present a novel, simplified approach for spectral stereoscopic imaging.
• To demonstrate a design utilizing a tunable acousto-optical filter (AOTF) for simultaneous spectral filtration of two beams.

Main Methods:

• Development of an original tunable acousto-optical filter (AOTF) design.
• Utilizing a single crystal medium for diffraction of two beams at different angles.
• Derivation of equations for prism angles to ensure beam trajectory and parallel propagation.
• Optimization of angles using ray-tracing simulations for aberration minimization.

Main Results:

• Achieved simultaneous spectral filtration of two light beams with a single AOTF.
• Demonstrated a compact system design without large crystals or complex relay optics.
• Experimental testing confirmed high-quality spectral images suitable for stereoscopic reconstruction.
• Validated the derived equations for prism angles and aberration optimization.

Conclusions:

• The proposed AOTF-based spectral stereoscopic imaging approach offers a simplified and effective solution.
• This method facilitates the development of advanced spectral stereo-imaging components.
• The design is adaptable to various previously developed AOTF types.