CPC G01N 21/3577 (2013.01) [G01N 21/552 (2013.01); G01N 2021/3595 (2013.01); G01N 2201/0633 (2013.01); G01N 2201/104 (2013.01)] | 24 Claims |
1. An optical interrogation system comprising:
an optical prism having two opposite sides including a sample side and a refraction side, the sample side having a plurality of interrogation areas;
a source assembly generating a field of illumination directed towards the refraction side;
a screen disposed in a screen plane intersecting the field of illumination, the screen being opaque to the field of illumination, the screen having an aperture allowing a portion of the field of illumination to reach and be refracted by the refraction side, be totally internally reflected at one of said interrogation areas of the sample side, thereby generating a signal, the signal refracted back by the refraction side, through the aperture, the screen being movable relative the optical prism, within the screen plane, to shift the aperture and expose different portions of the field of illumination to corresponding ones of the interrogation areas; and
a detector assembly configured to receive the signal from any one of the interrogation areas.
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