Point-by-point design method for mixed-surface-type off-axis reflective imaging systems with spherical, aspheric, and...

Area of Science:

• Optical Engineering
• Optical System Design

Background:

• Traditional optical systems often rely on simpler surfaces like spheres.
• Increasing complexity in optical systems necessitates advanced design methodologies.
• Mixed-surface-type systems combine spherical, aspheric, and freeform surfaces.

Purpose of the Study:

• To propose a general point-by-point design method for mixed-surface-type optical systems.
• To introduce methods for spherical system design and optical power assignment within this framework.
• To demonstrate surface evolution strategies from simpler to more complex forms.

Main Methods:

• Development of a point-by-point design algorithm for mixed-surface optical systems.
• Implementation of specific techniques for spherical surface design and optical power distribution.
• Proposal of three surface evolution pathways: sphere-to-asphere, sphere-to-freeform, and asphere-to-freeform.

Main Results:

• A novel point-by-point design methodology for optical systems with mixed surface types.
• Demonstration of a mixed-surface-type off-axis three-mirror system as a practical example.
• Effective optical power allocation, with spherical surfaces handling the majority, simplifying fabrication.

Conclusions:

• The proposed design method enables the creation of complex mixed-surface-type optical systems.
• Strategic power assignment, favoring spherical surfaces, significantly reduces manufacturing challenges.
• The developed method serves as a foundation for further optimization of advanced optical designs.