High-speed multiview imaging approaching 4pi steradians using conic section mirrors: theoretical and practical...

Area of Science:

• Computational imaging
• Optical microscopy
• 3D imaging techniques

Background:

• Broad angular range illumination/imaging is crucial for advanced 3D imaging and resolution enhancement.
• Current methods face challenges with wide angular coverage (±90°+), often requiring expensive objectives or sample manipulation that impacts speed and sample integrity.

Purpose of the Study:

• To propose novel strategies for achieving multiangle imaging approaching 4pi steradians.
• To enable high-speed, wide-angle imaging without costly components or sample perturbation.

Main Methods:

• Utilized concave parabolic or ellipsoidal mirrors for light collection.
• Employed fast, low rotational inertia scanners (e.g., galvanometers) for angular control.
• Derived theoretical and empirical relationships between system parameters (NA, wavelength, focal length, telecentricity) and field of view (FOV).

Main Results:

• Demonstrated that intrinsic tilt aberrations do not limit FOV in many multiview imaging applications.
• Presented strategies to mitigate spherical aberrations at obliquely illuminated flat boundaries.
• Achieved high-speed multiangle imaging capabilities applicable to microscopic, mesoscopic, and macroscopic scales.

Conclusions:

• The proposed mirror-based designs offer a practical and effective solution for wide-angle, high-speed multiangle imaging.
• These methods overcome existing limitations, broadening the applicability of computational 3D imaging techniques.
• The findings challenge conventional wisdom regarding tilt aberrations and FOV limitations.