EFFICIENT OPTICAL SYSTEM FOR COLLECTING SCATTERED RADIATION FOR RAMAN SPECTROMETER Russian patent published in 2013 - IPC G01J3/44 

FIELD: physics.

SUBSTANCE: optical system for collecting scattered radiation for a Raman spectrometer has optically-connected laser and elliptical mirror, lens and spectrometer arranged in series along the principal optical axis. The device includes a spherical mirror with a radius which is equal to twice the focal radius of the elliptical mirror, and a focusing lens, wherein the spherical mirror has a hole at the centre and is placed on the principal optical axis such that its centre of curvature coincides with the first focus of the elliptical mirror, their mirror surfaces are turned towards each other, and its centre coincides with the second focus of the elliptical mirror. The focusing lens is placed outside the elliptical mirror on the optical axis of the laser, orthogonal to the principal optical axis, and its focus coincides with the first focus of the elliptical mirror. The elliptical mirror has two holes lying at points of intersection of the surface of the mirror with the optical axis of the laser, wherein their diameter matches the diameter of the laser beam.

EFFECT: enabling increase in intensity of a Raman signal and enabling increase in sensitivity of a Raman spectrometer.

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