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Remote focal scanning optical projection tomography with an electrically tunable lens
Lingling Chen1, Sunil Kumar1, Douglas Kelly2
1Photonics Group, Department of Physics, Imperial College London, SW7 2AZ, UK.
Biomedical Optics Express
|November 1, 2014
Summary
A new remote focal scanning technique using an electrically tunable lens (ETL) enhances optical projection tomography (OPT). This method improves spatial resolution and light collection efficiency, speeding up image acquisition and reducing light dose for large samples.
Area of Science:
- Biomedical Imaging
- Optical Physics
Background:
- Optical Projection Tomography (OPT) traditionally requires mechanical scanning of the specimen or objective lens.
- This mechanical scanning can be slow and unstable, especially for larger samples or at lower magnifications.
Purpose of the Study:
- To introduce a novel remote focal scanning technique for OPT.
- To eliminate the need for physical specimen or objective lens movement during scanning.
- To improve the efficiency and speed of OPT acquisition.
Main Methods:
- Implementation of an electrically tunable lens (ETL) for remote focal scanning in OPT.
- Utilizing a 4× objective lens for the described technique.
- Comparison of performance metrics against traditional scanning methods.
Main Results:
- Achieved an average spatial resolution improvement of approximately 46%.
- Increased light collection efficiency by a factor of approximately 6.76.
- Demonstrated feasibility for lower magnifications and larger sample diameters.
Conclusions:
- The ETL-based remote focal scanning technique offers significant advantages for OPT.
- This method enhances acquisition speed and reduces light dose, making it suitable for challenging sample types.
- The technique addresses limitations of mechanical scanning in terms of speed and stability.
