Technologies and Practical Considerations for Implementing Near‐Infrared Chemical Imaging

Near‐Infrared Imaging of Polymers; from Basic Science to Industrial Applications

“…(7)(8)(9)(10) Recent advances in NIR instruments are of particular note. (1)(2)(3)(4)(5)(7)(8)(9) Those in NIR imaging systems are very rapid and attractive. (7,8) Nowadays, we can select various kinds of NIR imaging devices depending on demands, from a high-wavelength resolution type, a portable type and a wide area imaging type.…”

“…In the past decade or so, the developments of new NIR techniques, such as on-line spectrometers and handheld spectrometers and NIR imaging (NIR cameras, NIR hyperspectral imaging systems), have extended the application of NIR spectroscopy dramatically. (1)(2)(3)(4)(5)(6)(7)(8)(9)(10) NIR imaging collects tens of thousands of spatially distinct NIR spectra simultaneously. (6)(7)(8)(9)(10) These spatially resolved data provide qualitative and quantitative insight into the functionality of heterogeneous samples such as pharmaceuticals tablets, polymer laminates, or agricultural and biological materials.…”

“…It was only in the past decade that NIR imaging has developed significantly. (6)(7)(8)(9)(10) NIR imaging collects data in a spatially resolved manner, so that one can learn from where on a sample an NIR spectrum is obtained. Therefore, novel information about the spatial distribution of sample components can be derived.…”

“…NIR imaging has the following adavantages. (6)(7)(8)(9)(10) It is an in situ and nondestructive analysis method. It enables noncontact analysis and analysis using light fiber.…”

“…(1)(2)(3)(4)(5) Thus, developing an NIR image using well-defined peak heights or peak areas is not always easy. (6)(7)(8)(9)(10) Chemometrics is usually used for this purpose. One has to note that most of the research on NIR chemical imaging analysis has been based principally on the observation of spectral intensity change with the aid of PCA.…”