Scanning a focus through scattering media without using the optical memory effect
| Autor: | Tzu Lun Ohn, Bahareh Mastiani, Ivo M. Vellekoop |
|---|---|
| Přispěvatelé: | Biomedical Photonic Imaging, TechMed Centre |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Wavefront
Opacity Scattering business.industry Computer science Process (computing) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Measure (mathematics) Atomic and Molecular Physics and Optics 010309 optics Range (mathematics) Optics Position (vector) 0103 physical sciences 0210 nano-technology Focus (optics) business Physics - Optics Optics (physics.optics) |
| Zdroj: | Optics letters, 44(21), 5226-5229. The Optical Society |
| ISSN: | 0146-9592 |
| Popis: | Wavefront shaping makes it possible to form a focus through opaque scattering materials. In some cases, this focus may be scanned over a small distance using the optical memory effect. However, in many cases of interest, the optical memory effect has a limited range or is even too small to be measured. In such cases, one often resorts to measuring the full transmission matrix (TM) of the sample to completely control the light transmission. However, this process is time-consuming and may not always be possible. We introduce a new method for focusing and scanning the focus at any arbitrary position behind the medium by measuring only a subset of the transmission matrix, called Sparse Field Focusing (SFF). With SFF, the scan range is not limited to the memory effect and there is no need to measure the full transmission matrix. Our experimental results agree well with our theoretical model. We expect this method will find applications in imaging through scattering media, especially when the optical memory effect range is small. Comment: 5 pages, 3 figures, 1 movie(visualization 1) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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