Desensitization design method of a freeform optical system based on local curve control

Area of Science:

• Optical Engineering
• Optical Design
• Geometric Optics

Background:

• Freeform optical systems offer design flexibility but are sensitive to manufacturing and alignment errors.
• Traditional design methods struggle to adequately address error sensitivity in complex optical systems.

Purpose of the Study:

• To propose an error sensitivity evaluation function for freeform optical systems.
• To establish a desensitization design method for improving the robustness of optical systems.

Main Methods:

• Development of an error sensitivity evaluation function based on geometric optics.
• Application of the micro-element concept to analyze local surface curvature effects.
• Investigation of the relationship between surface errors and wavefront error (ΔWE) changes.

Main Results:

• A novel desensitization design method for optical systems was established.
• The method demonstrated the ability to reduce the impact of position errors on wavefront error.
• The proposed evaluation function is adaptable to various optical surfaces (spherical, aspheric, freeform).

Conclusions:

• The developed method effectively achieves desensitization design for optical systems.
• The approach enhances the manufacturability and alignment tolerance of freeform optics.
• This flexible method can be applied to a wide range of optical system designs.