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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

Published on: July 5, 2016

Nanoscale imaging using deep ultraviolet digital holographic microscopy.

Ahmad Faridian¹, David Hopp, Giancarlo Pedrini

¹Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, Stuttgart, Germany. faridian@ito.uni-stuttgart.de

|July 1, 2010

Summary

A novel deep ultraviolet off-axis digital holographic microscope (DHM) achieves submicron and nanoscale resolution. This high-resolution microscopy setup minimizes optical aberrations for advanced imaging applications.

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Area of Science:

Optics and Photonics
Microscopy
Nanotechnology

Background:

Optical aberrations limit resolution in traditional microscopy.
Deep ultraviolet (DUV) microscopy offers potential for enhanced resolution.
Off-axis digital holographic microscopy (DHM) provides a wavefront-sensing capability.

Purpose of the Study:

To present a deep ultraviolet off-axis digital holographic microscope (DHM).
To achieve submicron and nanoscale resolution using a simplified optical design.
To overcome limitations of optical elements in high-resolution imaging.

Main Methods:

Designed a deep ultraviolet off-axis digital holographic microscope (DHM) with minimal optical elements.
Implemented an oblique illumination strategy to enhance resolution.
Utilized a nano-structured template for resolution verification.

Main Results:

The DHM setup demonstrated submicron resolution.
Nanoscale resolution capabilities were confirmed by the nano-structured template.
The simplified optical path effectively reduced aberrations.

Conclusions:

The developed DHM is capable of high-resolution imaging in the deep ultraviolet range.
Oblique illumination is an effective technique for enhancing resolution in DHM.
The system shows promise for nanoscale metrology and imaging.