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Integrated Photoacoustic Ophthalmoscopy and Spectral-domain Optical Coherence Tomography

Integrated Photoacoustic Ophthalmoscopy and Spectral-domain Optical Coherence Tomography

Published on: January 15, 2013

Optical imaging module for astigmatic detection system.

Wei-Min Wang¹, Chung-Hsiang Cheng¹, Gabor Molnar²

¹Institute of Physics, Academia Sinica, Taipei 11529, Taiwan.

The Review of Scientific Instruments

|June 3, 2016

Summary

This summary is machine-generated.

This study presents an optical imaging module for astigmatic detection systems (ADS). The module, built using a commercial optical pickup unit (OPU), achieves 1 μm resolution for specimen and laser spot imaging, suitable for high-speed atomic force microscopy.

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Area of Science:

Optical Engineering
Microscopy Systems
Nanotechnology

Background:

Astigmatic detection systems (ADS) require precise optical imaging for accurate measurements.
Commercial optical pickup units (OPU) offer a potential base for advanced imaging modules.
High-speed atomic force microscopy (HS-AFM) demands efficient and high-resolution imaging capabilities.

Purpose of the Study:

To design and demonstrate an optical imaging module for ADS using a commercial OPU.
To achieve high lateral resolution (approx. 1 μm) for specimen and laser spot visualization.
To explore the module's potential application in high-speed atomic force microscopy.

Main Methods:

Integration of a coaxial illuminant into a commercial OPU.
Inclusion of polarizers and an infrared filter to mitigate stray light.
Testing the module with digital versatile disks (DVDs), Blu-ray DVDs, and micro-cantilevers.

Main Results:

Successful demonstration of the imaging module with DVD and Blu-ray media.
Achieved lateral resolution of approximately 1 μm for specimen and laser spot imaging.
Confirmed the module's capability to image small cantilevers (2 μm x 5 μm).

Conclusions:

The developed optical imaging module is effective for astigmatic detection systems.
The module, based on a commercial OPU, offers high-resolution imaging without OPU modification.
The design shows significant potential for integration into high-speed atomic force microscopy.