Design and application of broadband and wide-angle double-layer diffractive optical element based on dual-objective
Optics Express
|July 30, 2025
Summary
This study introduces an advanced optimization method for double-layer diffractive optical elements (DLDOEs), significantly improving diffraction efficiency and angular stability for broadband and wide-angle applications.
Area of Science:
- Optics
- Materials Science
- Optical Engineering
Background:
- Traditional double-layer diffractive optical elements (DLDOEs) suffer from low diffraction efficiency and high angular sensitivity in broadband and wide-angle applications.
- Optimizing DLDOEs requires balancing substrate material selection with microstructure height for optimal performance.
Purpose of the Study:
- To develop a dual-objective optimization method to enhance the performance of DLDOEs.
- To address the limitations of conventional DLDOEs in broadband and wide-angle scenarios.
Main Methods:
- Developed a mean-standard deviation dual-objective diffraction efficiency evaluation model (MSDODE).
- Incorporated material library matching constraints based on dispersion characteristics.
- Achieved coordinated optimization of DLDOE substrate material and microstructure height.
Main Results:
- Attained an average diffraction efficiency of 0.9614 across 0.4–1.0μm wavelengths and 0–30° incident angles.
- Demonstrated minimal decrease (0.08%) in diffraction efficiency at 30° compared to 0°.
- Achieved excellent chromatic aberration correction in an annular-aperture lens (AFL) system with MTF > 0.36 at 166lp/mm.
Conclusions:
- The proposed dual-objective optimization method significantly enhances DLDOE performance.
- The optimized DLDOEs show superior broadband and wide-angle capabilities with minimal efficiency loss.
- The design offers a viable solution for advanced optical systems requiring high performance across wide spectral and angular ranges.
