Increasing aperture and depth of field simultaneously with wavefront coding technology.

Area of Science:

• Optical Engineering
• Image Science

Background:

• Traditional optical designs face a trade-off between aperture size and depth of field (DOF).
• Increasing aperture typically reduces DOF, limiting imaging capabilities in certain applications.

Purpose of the Study:

• To present a novel method for simultaneously increasing both aperture size and depth of field (DOF) in optical systems.
• To demonstrate a new approach to optical design that overcomes the conventional aperture-DOF limitations.

Main Methods:

• A novel lens-combined wavefront coding (WFC) technique was developed for optical design.
• Aberrations were rationally balanced, not minimized, to achieve the desired outcome.
• Two optical systems were designed: one traditional and one using lens-combined WFC.
• Experiments were conducted with manufactured lenses in laboratory and real-world scenarios.
• A spatially invariant deconvolution algorithm was used to mitigate field-of-view aberrations.

Main Results:

• The lens-combined WFC method successfully enhanced both aperture and DOF simultaneously.
• Experimental results confirmed the extended DOF in both controlled and natural environments.
• The proposed method demonstrated improved imaging performance compared to traditional designs.

Conclusions:

• Lens-combined wavefront coding (WFC) offers a viable solution for simultaneously increasing aperture and DOF.
• This technique provides a new paradigm in optical design for enhanced imaging performance.
• The findings have implications for various fields requiring high-quality imaging with extended focus ranges.