Strategy for the design of multifocal surfaces

Area of Science:

• Optics and Photonics
• Materials Science
• Biomedical Engineering

Background:

• Designing multifocal lenses requires precise control over surface geometry.
• Non-spherical surfaces offer advantages over traditional spherical designs for correcting complex visual aberrations.

Purpose of the Study:

• To propose a novel method for designing non-spherical surfaces with specific multifocal optical properties.
• To provide a computational aid for engineers designing advanced ophthalmic lenses.

Main Methods:

• Describing an axially symmetrical surface using a polynomial representation.
• Calculating polynomial coefficients to ensure near-constant optical path lengths between object and image points.
• Evaluating the method with examples, including a 'trifocal' surface.

Main Results:

• Demonstration of a method to design surfaces with tailored multifocal characteristics.
• Successful application to create a 'trifocal' surface design.
• Comparison of the proposed 'trifocal' surface with existing bifocal contact lens designs, highlighting potential improvements.

Conclusions:

• The proposed polynomial coefficient optimization method is a viable tool for designing advanced multifocal surfaces.
• This approach can aid in the development of next-generation ophthalmic lenses with superior aberration control.
• Further research can explore the application of this method to more complex surface geometries and optical requirements.