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Distortion-free multi-element Hypergon wide-angle micro-objective obtained by femtosecond 3D printing
Optics Letters
|May 16, 2020
Summary
We developed a 3D-printed micro-objective lens using femtosecond lithography for distortion-free, wide-angle imaging. This advanced optical technology enables compact, high-resolution image sensors for industrial applications.
Area of Science:
- Optics and Photonics
- Microfabrication
- Advanced Imaging Systems
Background:
- Micro-optics are essential for miniaturized imaging devices.
- Achieving wide field-of-view and high resolution simultaneously in micro-objectives is challenging.
- Distortion-free imaging is critical for accurate image analysis.
Purpose of the Study:
- To present a novel 3D-printed complex wide-angle multi-element Hypergon micro-objective.
- To demonstrate distortion-free imaging performance with micro-scale aspherical lenses.
- To introduce a new method for fabricating crucial aperture stop components.
Main Methods:
- Fabrication using a multi-step femtosecond two-photon lithography process.
- Novel application of shadow evaporation for creating non-transparent aperture stops.
- Characterization of imaging performance, including field-of-view and resolution.
Main Results:
- A complex wide-angle Hypergon micro-objective with elements smaller than 1 mm was successfully fabricated.
- Distortion-free imaging performance was achieved over a 70° field-of-view.
- A resolution of 12.4 µm was obtained, demonstrating high imaging quality.
Conclusions:
- The developed 3D-printed micro-objective offers excellent wide-angle, distortion-free imaging capabilities.
- The novel shadow evaporation technique is effective for creating essential optical components.
- Future integration with CMOS chips can lead to highly compact, high-quality integrated sensor devices for industry.
