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Optical phase conjugation assisted scattering lens: variable focusing and 3D patterning
- Source :
- SCIENTIFIC REPORTS(6), Scientific Reports
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- Variable light focusing is the ability to flexibly select the focal distance of a lens. This feature presents technical challenges, but is significant for optical interrogation of three-dimensional objects. Numerous lens designs have been proposed to provide flexible light focusing, including zoom, fluid, and liquid-crystal lenses. Although these lenses are useful for macroscale applications, they have limited utility in micron-scale applications due to restricted modulation range and exacting requirements for fabrication and control. Here, we present a holographic focusing method that enables variable light focusing without any physical modification to the lens element. In this method, a scattering layer couples low-angle (transverse wave vector) components into a full angular spectrum, and a digital optical phase conjugation (DOPC) system characterizes and plays back the wavefront that focuses through the scattering layer. We demonstrate micron-scale light focusing and patterning over a wide range of focal distances of 22-51 mm. The interferometric nature of the focusing scheme also enables an aberration-free scattering lens. The proposed method provides a unique variable focusing capability for imaging thick specimens or selective photoactivation of neuronal networks.
- Subjects :
- Light
Holography
02 engineering and technology
01 natural sciences
Article
law.invention
010309 optics
Optics
law
0103 physical sciences
Scattering, Radiation
Focal length
Computer Simulation
Lenses
Physics
Wavefront
Multidisciplinary
Scattering
business.industry
Optical Devices
Transverse wave
Equipment Design
021001 nanoscience & nanotechnology
Equipment Failure Analysis
Angular spectrum method
Lens (optics)
Interferometry
0210 nano-technology
business
Subjects
Details
- ISSN :
- 20452322
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- Scientific Reports
- Accession number :
- edsair.doi.dedup.....84aaab49cdb89e383298d71688989d40