Spectroscopic apparatus and methods

Details Spectroscopic apparatus and methods Spectroscopic apparatus and methods

1992-11-13

1995-08-15

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

With raman type light scattering

356326, G01J 344

Patent

active

054424380

ABSTRACT:
A sample placed under a microscope is illuminated by light from a laser beam. Raman scattered light is passed back via a dichroic filter to various optical components which analyse the Raman spectrum, and thence to a CCD detector. The optical components for analysing the Raman spectrum include tunable dielectric filters in a filter wheel; a Fabry-Perot etalon; and a diffraction grating. These various components may be swapped into the optical path as desired, for example using movable mirrors, enabling the apparatus to be used very flexibly for a variety of different analysis procedures. Various novel analysis methods are also described.

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