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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
Published on: July 5, 2016
Coherence-controlled holographic microscope.
1Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2, 616 69 Brno, Czech Republic. kolman.pavel@post.cz
Optics Express
|October 14, 2010
Summary
A novel coherence-controlled holographic microscope (CCHM) offers speckle-free imaging and enhanced resolution. This advanced technique enables optical sectioning, improving microscopic analysis with various light sources.
Area of Science:
- Optics and Photonics
- Microscopy
- Biomedical Imaging
Background:
- Conventional digital holographic microscopy (DHM) is limited by light source coherence.
- Achieving high-quality imaging, improved resolution, and optical sectioning in microscopy remains a challenge.
Purpose of the Study:
- To develop and characterize a transmitted-light coherence-controlled holographic microscope (CCHM).
- To demonstrate the capabilities of CCHM, including speckle-free imaging, enhanced lateral resolution, and optical sectioning.
- To explore the use of light sources with arbitrary coherence in holographic microscopy.
Main Methods:
- Implementation of an off-axis achromatic interferometer for CCHM.
- Utilizing coherence gating for optical sectioning.
- Observation of a model sample with and without a diffuser using a low-coherence light source.
Main Results:
- The CCHM system provides high-quality, speckle-free imaging.
- Demonstrated improved lateral resolution compared to conventional methods.
- Successfully showcased optical sectioning capabilities using a low-coherence light source.
Conclusions:
- The developed CCHM is a versatile holographic microscopy technique.
- CCHM overcomes limitations of traditional DHM by accommodating various light sources.
- The system offers significant advantages in imaging quality, resolution, and optical sectioning for microscopic applications.
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