Skip navigation

True Raman Imaging™

Rapid surveying of samples

If you know what you are looking for you do not always need detailed spectral information. In this case, True Raman Imaging is the ideal technique to use. It takes a very fast ‘photo' of your sample, filtered to show only a very narrow frequency range. You choose the wavelength to reveal the distribution of a chemical species of interest.

True Raman Imaging is especially useful if you want to survey a large number of very similar samples.

True Raman Imaging

True Raman Imaging is inherently fast. It keeps the sample stationary and collects all data simultaneously. It does not need to spend time collecting a complete spectrum from each point on the sample.

True Raman Imaging spreads the laser power over a large area, enabling you to maximise the available power without any risk of damaging the sample. This leads to very short acquisition times.

Losing focus…but keeping sharp

True Raman Imaging works by:

  • defocusing the laser
  • illuminating a large area of the sample
  • selecting a narrow frequency range of light using a tuneable filter
  • directly imaging this light onto the CCD detector, just like taking a photo

It is simple to use. You choose the Raman band of interest and the system automatically selects and tunes the appropriate filter for you.

Regions that Raman-scatter at the frequency of interest appear bright on the image, thereby showing the location, shape and distribution of the material.

Our other methods of generating images

True Raman Imaging complements Renishaw's other imaging techniques:

StreamLine™: generate chemical images rapidly

StreamLine™ Slalom

StreamHR™: generate high resolution chemical images

Many aspects of Renishaw's innovative technology are covered by patents.