шектік жиілік

шектік жиілік

A term widely used in information theory, but here applies to the highest frequency, shortest wavelength, that can be identified in an interferogram. It is the one for which there are exactly two points per cycle. The contribution of any higher frequency, signal or noise, can be represented by some lower frequency and so will appear aliased or folded into the spectrum.

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Industri / Domain: Bahan-bahan kimia
Kategori: Spektroskopi
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Peralatan listrik; Pasokan daya

The number of complete cycles or vibrations per unit of time.

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Peralatan listrik; Generator

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Bahan-bahan kimia; Spektroskopi

The ideal input beam is a cylinder of light. No beam of finite dimensions can be perfectly collimated; at best there is a diffraction limit. In practice the input beam is a cone ...

бірігіп қосу

Bahan-bahan kimia; Spektroskopi

The process of adding interferograms together to achieve an improvement in signal-to-noise ratio.

орталық шығарылым

Bahan-bahan kimia; Spektroskopi

The sharp, intense part of an interferogram. The size of the centerburst is directly proportional to the amount of infrared radiation striking the detector.

импульстер қатарының қиюы

Bahan-bahan kimia; Spektroskopi

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негізгі желіні түзету

Bahan-bahan kimia; Spektroskopi

A spectral manipulation technique used to correct spectra with sloped or varying baselines. The user must draw a function parallel to the baseline, then this function is ...

бедерсіз спектр

Bahan-bahan kimia; Spektroskopi

A single beam spectrum acquired with no sample in the infrared beam. The purpose of a background spectrum is to measure the contribution of the instrument and environment to the ...