apodization


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apodization

(ap-ŏ-di-zay -shŏn) Any process suppressing the secondary maxima of a diffraction pattern, such as the faint rings around the Airy disk of an optical image; this allows finer detail to be resolved. It may be achieved, for example, by progressively reducing the transmission of the telescope from the center of the aperture to its periphery.

apodization

[‚a·pə·də′zā·shən]
(electronics)
A technique for modifying the response of a surface acoustic wave filter by varying the overlap between adjacent electrodes of the interdigital transducer.
(optics)
The modification of the amplitude transmittance of the aperture of an optical system so as to reduce or suppress the energy of the diffraction rings relative to that of the central Airy disk.
(spectroscopy)
A mathematical transformation carried out on data received from an interferometer to alter the instrument's response function before the Fourier transformation is calculated to obtain the spectrum.
References in periodicals archive ?
Tenders are invited for Dynamic focus dynamic aperture dynamic apodization monitor module 15 inch lcd monitor broad band multi frequency probes
The new fast-aperture lens with an apodization filter is ideal for portrait with sublime focus effects.
5, Bruker Optics, Ettlingen, Germany), with BlackmanHarris 3-Term apodization over the range of 4000 to 400 [cm.
Choice of an apodization function form is most often determined by specific tasks of application, such as the achievement of the lowest level of the first side lobe of reflection (transmission) band (Figure 4(a), line 3), or the maximum suppression of peaks in the interval between adjacent Bragg reflection bands (Figure 4(a), line 2).
In mathematics and in signal processing, a window function (also known as an apodization function or tapering function) is a mathematical function that is zero-valued outside of some chosen interval [13].
Rezig, "Broad antireflection grating by apodization of one dimensional photonic crystal," PIERS Proceedings, 1461-1464, Marrakesh, Morocco, Mar.
Apodization is applied during signal reception and transmission to improve the SNR by suitably shaping the Tx or Rx beam.
FTIR spectra were recorded on a Perkin-Elmer 1760-X Fourier transform infrared spectrometer using a deuterated triglycine sulfate detector and a normal Beer-Norton apodization function.
In neither the 1-D nor the 2-D transform, was any apodization applied in the calculation of the result.
In addition, there is an enlarged apodization section.
Optical side effects (haloes/glare) associated with multifocal IOL implantation are reduced in modern, diffractive designs incorporating optical features such as asphericity and apodization, and multifocal implantation is an increasingly popular choice (9).