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Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution

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Minimalist solid catadioptric telephoto and design method.

Shuhang Xie, Shaohua Gao, Yao Gao

|March 17, 2026

Summary

This summary is machine-generated.

This study presents a compact mini telephoto imaging system using a single lens. The novel design offers high performance and robustness, overcoming challenges in traditional systems.

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Area of Science:

Optical Engineering
Imaging Systems

Background:

Reflective telephoto systems face alignment difficulties.
Refractive systems often have extended optical paths.
Miniaturization is a key challenge in modern imaging.

Purpose of the Study:

To propose a compact and cost-effective mini telephoto imaging system.
To develop a design methodology for miniaturized imaging systems.
To address alignment and path length issues in telephoto designs.

Main Methods:

Developed a theoretical model using Snell's law.
Utilized particle swarm optimization for lens and coating optimization.
Introduced an aspheric surface for aberration correction.
Presented an alternative two-spherical-lens design.

Main Results:

Achieved an 8° full field of view and f-number of 4.5.
Demonstrated a modulation transfer function > 0.2 at 125 lp/mm.
Near-diffraction-limited imaging in the visible spectrum.
Tolerance analysis confirmed robustness to manufacturing and alignment errors.

Conclusions:

The proposed single-lens design is compact, manufacturable, and cost-effective.
Offers a viable solution for miniaturized, high-performance telephoto imaging.
The design methodology provides a robust approach for optical system development.