Glued diffraction optical elements with broadband and a large field of view

Area of Science:

• Optical Engineering
• Diffractive Optics
• Photonics

Background:

• Hybrid diffractive-refractive optical systems require high diffraction efficiency for wide field-of-view applications.
• Single-layer diffractive optical elements struggle to maintain high diffraction efficiency across broadband wavelengths and wide incident angles.

Purpose of the Study:

• To address the limitations of single-layer diffractive optical elements in maintaining efficiency.
• To introduce and evaluate Glued Diffractive Optical Elements (GDOEs) for improved optical system performance.

Main Methods:

• Developed Glued Diffractive Optical Elements (GDOEs) by bonding two single-layer diffractive elements with optical adhesives.
• Optimized diffractive optical element parameters to enhance broadband diffraction efficiency and modulation transfer function.
• Minimized stray light by reducing unwanted diffraction orders through the GDOE structure.

Main Results:

• GDOEs achieved over 90% diffraction efficiency for incident angles up to 58°.
• The optical adhesive layer compensated for diffraction efficiency losses and minimized internal reflection/refraction.
• Improved image quality was observed in systems utilizing the GDOE design.

Conclusions:

• GDOEs offer a viable solution for achieving high diffraction efficiency and broadband performance in optical systems.
• The proposed design method enables the integration of advanced diffractive elements into diverse optical system architectures.
• This technology enhances the utility of diffractive optics in demanding applications requiring wide fields of view and spectral ranges.