Analyzing performance fluctuations in flat lenses due to feature structure distortion using a differential profile...

Area of Science:

• Optics and Photonics
• Optical Engineering
• Materials Science

Background:

• Multi-level diffractive lenses (MDLs) offer broadband achromatic properties, making them attractive for lightweight optical systems.
• Manufacturing accuracy significantly impacts MDL feature structure (ring-bands), leading to performance degradation and limiting practical applications.
• Existing design frameworks require refinement to address distortion-induced performance loss in MDLs.

Purpose of the Study:

• To refine functional relationships of MDL feature structures and develop an analytical method for assessing performance loss due to manufacturing distortions.
• To investigate lens performance loss across seven distortion types from typical MDL manufacturing processes.
• To provide insights into MDL manufacturing tolerances and recommendations for process optimization.

Main Methods:

• Development of an innovative analytical method: differential profile parsing (DPP).
• Application of DPP to efficiently and accurately analyze performance loss caused by MDL feature structure distortion.
• Categorization and investigation of seven types of distortions arising from typical MDL manufacturing.

Main Results:

• The DPP method successfully quantifies performance loss associated with various MDL feature structure distortions.
• Investigations revealed specific impacts of different distortion types on lens performance.
• The study identified critical manufacturing tolerances for MDLs.

Conclusions:

• The proposed DPP method offers valuable guidance for practical MDL manufacturing applications.
• Reducing the degree of MDL feature structure distortion significantly enhances optical performance.
• Optimizing manufacturing processes based on DPP insights is crucial for realizing the full potential of MDLs.