Acousto-optical spectrometer
http://dbpedia.org/resource/Acousto-optical_spectrometer an entity of type: WikicatSpectrometers
An acousto-optical spectrometer (AOS) is based on the diffraction of light by ultrasonic waves. A piezoelectric transducer, driven by the RF signal (from the receiver), generates an acoustic wave in a crystal (the so-called Bragg-cell). This acoustic wave modulates the refractive index and induces a phase grating. The Bragg-cell is illuminated by a collimated laser beam. The angular dispersion of the diffracted light represents a true image of the IF-spectrum according to the amplitude and wavelengths of the acoustic waves in the crystal. The spectrum is detected by using a single linear diode array (CCD), which is placed in the focal plane of an imaging optics. Depending on the crystal and the focal length of the imaging optics, the resolution of this type of spectrometer can be varied.
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音響光学型電波分光計（おんきょうこうがくがたでんぱぶんこうけい、英：Acousto-Optical Spectrometer、AOS）は、音響光学素子とレーザー光を用いて、回折効果を利用して電波のスペクトルを得る装置である。コンピュータの発達以前では高分解能、広帯域において最高の方法であったため、電波望遠鏡による宇宙電波の観測で広く用いられた。コンピュータの発達に伴い、徐々にデジタル分光計に置き換えられつつある。
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Acousto-optical spectrometer
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音響光学型電波分光計
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13406872
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1086815926
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An acousto-optical spectrometer (AOS) is based on the diffraction of light by ultrasonic waves. A piezoelectric transducer, driven by the RF signal (from the receiver), generates an acoustic wave in a crystal (the so-called Bragg-cell). This acoustic wave modulates the refractive index and induces a phase grating. The Bragg-cell is illuminated by a collimated laser beam. The angular dispersion of the diffracted light represents a true image of the IF-spectrum according to the amplitude and wavelengths of the acoustic waves in the crystal. The spectrum is detected by using a single linear diode array (CCD), which is placed in the focal plane of an imaging optics. Depending on the crystal and the focal length of the imaging optics, the resolution of this type of spectrometer can be varied.
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音響光学型電波分光計（おんきょうこうがくがたでんぱぶんこうけい、英：Acousto-Optical Spectrometer、AOS）は、音響光学素子とレーザー光を用いて、回折効果を利用して電波のスペクトルを得る装置である。コンピュータの発達以前では高分解能、広帯域において最高の方法であったため、電波望遠鏡による宇宙電波の観測で広く用いられた。コンピュータの発達に伴い、徐々にデジタル分光計に置き換えられつつある。
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1336