Checklist

• I have searched the existing issues and discussions for a similar question or feature request.
• I have read the documentation and tried to find an answer there.
• I am using the latest version of Optiland.
• I have included all necessary context.

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Feature Request: Paraxial → Thick Lens Conversion Tool

Is your feature request related to a problem? Please describe.

Optiland currently has the means to model paraxial surfaces, or thin lens surfaces. These are defined solely by their focal length and are modelled geometrically as planes.

Describe the solution you'd like

Provide a utility to convert:

• Paraxial elements (e.g., defined by focal length)
• Into physical thick lenses (with curvature, thickness, refractive index)
• Optionally constrained by glass catalog availability, or a lens material may be provided as an argument.

Describe alternatives you've considered

• Manually designing from first principles, which is slow(er)

Additional context

• Examples in the docs should also be provided/updated.