G - Physics – 02 – B
Patent
G - Physics
02
B
88/114
G02B 5/20 (2006.01) G01J 3/12 (2006.01) G01N 21/47 (2006.01) G02B 5/24 (2006.01)
Patent
CA 1257796
ABSTRACT A narrow wavelength band filtering device is provided by forming a highly ordered crystalline colloidal structure within a cell. The crystalline colloidal structure is relatively thin and has substantially planar and substantially parallel surface portions. The crystalline colloidal structure is formed by dispersing electrically charged particles, e.g., polystyrene spheres, within an appropriate solvent. The filtering device of the present invention may form the basis for a mechanically simple and highly efficient monochromator, as well as find application in an improved system for investigating the Raman and/or emission spectra of selected sample materials. In addition, a novel multiple wavelength atomic absortion or emission spectograph is provided utilizing the filter device of the present invention.
484007
Borden Ladner Gervais Llp
University Of Pittsburgh
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