Raman spectra explained
We graphically depict the results of our measurements as Raman spectra. We plot the intensity of the scattered light (y-axis) for each energy (frequency) of light (x-axis). The frequency is traditionally measured in a unit called the wavenumber (number of waves per cm, cm-1).
We plot the x-axis frequencies relative to that of the laser as it is the shift in energy of the light that is of particular interest.
How do I get the information I want from my spectrum?
You can tell a great deal about a material from its Raman spectrum, with different features relating to different aspects of the material.
The key features are:
The Raman shifts and relative intensities of all of the Raman bands of the material
With this, we can identify the material.
Individual band changes
A band may shift, narrow or broaden, or vary in intensity. These changes can reveal information about stresses in the sample, variations in crystallinity, and the amount of material respectively.
Variations in spectra with position on the sample
This will reveal changes in the uniformity (homogeneity) of the material. You can analyse at several arbitrary points, or systematically measure an array of points (enabling the production of images of composition, stress, crystallinity, etc.)
Download our Raman spectroscopy explained booklet
產品型錄： 拉曼光譜說明 [tw]
Renishaw 自 1990 年代早期開始供應拉曼光譜系統。「拉曼光譜是什麼？」是我們員工經常被問及的問題之一。 這本小冊子能回答這個問題，以及「如何產生拉曼影像？」與「SERS 是什麼？」等這類相關問題。我們希望這本小冊子對您會有所助益。