Automatic generation method for long-focal-length unobscured freeform optical systems with small volume

Area of Science:

• Optical Engineering
• System Design
• Freeform Optics

Background:

• Existing design methods for long-focal-length unobscured freeform systems often fail to simultaneously address imaging quality and volume constraints.
• This limitation results in designs that are not lightweight, hindering their application in space-constrained scenarios.

Purpose of the Study:

• To propose an automated design method for long-focal-length unobscured reflective systems.
• To ensure designs meet stringent volume constraints while maintaining high imaging quality.
• To develop a lightweight optical system through simultaneous optimization.

Main Methods:

• Adaptive structural parameter range setting for efficient calculation.
• Ray tracing to construct systemic volume and area functions.
• Simulated annealing and the improved W-W method for optimization and image enhancement.

Main Results:

• Successfully automated the design of a three-mirror unobscured freeform reflective optical system.
• Achieved designs that satisfy both volume constraints and high imaging quality requirements.
• Demonstrated effective calculation of parameter ranges for structural parameter searching.

Conclusions:

• The proposed method effectively designs lightweight, long-focal-length unobscured freeform systems with high imaging quality.
• Automated design process facilitates the search for optimal structural parameters.
• The approach offers a significant advancement in designing compact and high-performance optical systems.