Why to use Raman spectrometer to analyze cultural relics？

   Raman spectroscopy is characterized by the molecular properties of substances, without the properties of objects and the necessity of carriers. It only requires very few samples (up to 1μm) . It has characteristics, fast, sensitive, simple and so on. . Therefore, Raman spectroscopy technology has been extensively and in-depth researched in the identification of cultural relics.Raman spectroscopy is an analytical technique that can obtain molecular information of substances and be used for the analysis of cultural relics. Especially the method in which Raman spectroscopy is analyzed in situ.

  The principle of Raman spectroscopy allows a beam of monochromatic light with a frequency of ωi to enter a substance, and the molecules in the substance interact with the incident light to generate scattered light. For example, the frequency of the scattered light changes to become ωi ± ωj, that is, in the excitation spectrum. A spectrum line is generated on both sides, and this kind of scattering is Raman scattering. In Raman scattering, the Raman shift ωj is related to the vibrational energy level of matter molecules. Different materials have different vibration and rotation energy levels, and therefore different Raman displacements. For the same substance, if the incident light of different frequencies is irradiated, the frequency of the generated Raman scattered light is also different, but the Raman shift is a definite value. Therefore, Raman shift is a physical quantity that characterizes the vibrational and rotational energy levels of the molecules of a substance. Raman spectroscopy can be used to study the molecular structure.

   Robin J.H. Clark from the University of London in the United Kingdom [5] used Raman microscope to study the red pigment of iron oxide red and ceramic fragments in southern Italy for the first time.

   Using Raman spectroscopy technology can achieve recognition accuracy and avoid damage to calligraphy and painting.Raman spectroscopy can be used to identify antiquities.In scientific and technological archaeology, only by comprehensively using the advantages of various modern scientific and technological means can we conduct a more comprehensive study of ancient cultural relics.Raman spectroscopy is a very effective method for the study of metal cultural relics.

   Raman spectroscopy is a non-destructive and accurate in-situ analysis method, suitable for accurate analysis and research of cultural relics. The analysis of cultural relics by Raman spectroscopy broadens the methods of cultural relic identification and improves the scientificity and reliability of cultural relics. At present, Raman spectroscopy is not only used for material analysis, but also widely used in medicine, geology, military and other fields, and is expected to be widely used.

  Optosky Raman microscope combines benefits of microscope and Raman spectrometer. It becomes possible to see macro or micro areas of samples on the computer screen with just a single mouse click. When accurate positioning is visualized, the observer can detect Raman signals under various surface conditions, and synchronized Mapping can be displayed intuitively on the screen at one click operation. As a result, it provides great convenience to detect micro or macro areas of samples. Combine unique patented conjugate focusing(true confocal) system with accurate image processing algorithm, and it enables a very small sample areas to be analyzed, as well as it requires minimal operator training and maintenance, yet resulting in uniform result not just spectra.

   ATR8300 is equipped with tailor-made objective, and laser spot on the sample becomes very close to diffraction limit, then focal information can be displayed in accurate and intuitive on the screen with .This

configuration improves Raman spectral quality for overcoming the limitations of Raman systems where the focal plane for Raman signal collection is slightly above or below the imaging plane. ATR8300 works very stable with no moving components of optical path switch, hence it avoids loss off optical path while imaging formed, and it gains optimized signal for separating imaging formed from Raman signal collection.