spectrum analyzer

The spectrum analyzer is an instrument for measuring the radiation spectrum of a luminaire, ie the indicator parameter of the illuminant itself.

According to the working principle of modern spectroscopy instruments, spectrometers can be divided into two categories: classic spectrometers and new spectrometers. Classical spectroscopy instruments are based on the principle of spatial dispersion; new spectroscopic instruments are instruments built on the principle of modulation. Classical spectroscopic instruments are slit spectroscopic instruments. The modulation spectrometer is non-spatially split. It uses circular apertures to enter the light according to the principle of the dispersion of the dispersive components. Spectroscopic instruments can be classified into prism spectrometers, diffraction grating spectrometers and interference spectrometers. Optical multi-channel analyzer OMA (Optical Multi-channel Analyzer) is a new type of optical spectrum analyzer that adopts photon detector (CCD) and computer control in the past ten years. It integrates information acquisition, processing and storage. Since OMA no longer uses photosensitive emulsions, it avoids and eliminates the need for dark room processing and subsequent cumbersome processing and measurement tasks. This has fundamentally changed the traditional spectrum technology, greatly improved working conditions and improved work efficiency. Analyze the spectrum, accurate and rapid measuring basin, convenient, and high sensitivity, fast response time, high spectral resolution, measurement results can be immediately read from the display or by the printer, plotter output. At present, it has been widely used in almost all spectral measurement, analysis and research work, and is especially suitable for the detection of weak signals and transient signals.

The principle of analysis is to absorb the characteristic spectrum of the element to be measured emitted by the light source through the ground state atoms of the element to be detected in the vapor of the sample, and the degree of attenuation of the emission spectrum to obtain the content of the element to be measured in the sample. Per-Beer's Law A=-LG I/I o=-lgT=KCL where I is the transmitted light intensity, I0 is the emitted light intensity, T is the transmittance, and L is the light path through the atomizer due to L being constant The value is therefore A=KC.