Engineering an achromatic Bessel beam using a phase-only spatial light modulator and an iterative Fourier transformation algorithm
| Autor: | Rainer Heintzmann, Aurélie Jost, Kai Wicker, Marie Walde |
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| Rok vydání: | 2016 |
| Předmět: |
Frequency filtering
Physics::Optics 02 engineering and technology Spatial light modulator 01 natural sciences Iterative Fourier transform algorithm law.invention 010309 optics symbols.namesake Optics law 0103 physical sciences Electrical and Electronic Engineering Physical and Theoretical Chemistry Non-diffracting beams Physics Bessel beam Bessel filter business.industry Image plane 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Lens (optics) Fourier transform Achromatic lens symbols 0210 nano-technology business Algorithm Bessel function |
| DOI: | 10.34657/9979 |
| Popis: | Bessel illumination is an established method in optical imaging and manipulation to achieve an extended depth of field without compromising the lateral resolution. When broadband or multicolour imaging is required, wavelength-dependent changes in the radial profile of the Bessel illumination can complicate further image processing and analysis. We present a solution for engineering a multicolour Bessel beam that is easy to implement and promises to be particularly useful for broadband imaging applications. A phase-only spatial light modulator (SLM) in the image plane and an iterative Fourier Transformation algorithm (IFTA) are used to create an annular light distribution in the back focal plane of a lens. The 2D Fourier transformation of such a light ring yields a Bessel beam with a constant radial profile for different wavelength. |
| Databáze: | OpenAIRE |
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