Spectroscopy is the process of analyzing how an object absorbs and gives off light. It also involves the study of how different chemicals disperse and spread light into many different wavelengths, separating it into multiple colors. Because all objects absorb and emit light, scientists can gather information about the chemical properties simply by analyzing what kind of light is absorbed or emitted. Check thickness measurement via http://www.semiconsoft.com/wp/thickness-measurement/ . .
Near infrared spectroscopy is a kind of spectroscopy that scans an object and chemical using the near infrared portion of the electromagnetic spectrum, which is basically light with wavelengths of about 400.
NIR spectroscopy can provide information about its chemical composition. Near infrared technology uses a light source to provide light that will bounce off the sample. A light-dispersing object, such as a prism, separates the light into different wavelengths.
Near infrared spectroscopy offers some advantages over other kinds of spectroscopy. NIR spectroscopy is affordable. People can conduct extensive spectroscopic analysis in affordable price compared to MRI scanning and other spectroscopic methods. NIR i.e. near infrared light can penetrate a lot deeper than infrared light, so scanning objects and chemicals at a much larger scale is possible with near infrared reflectance.
Every agricultural and pharmaceutical industry makes use of NIR to check defects in their products. NIR technology is also used in combustion tests and polymer sciences, as well as in scanning for octane levels in gasoline.