Feature extraction system for extracting a predetermined feature

Details Feature extraction system for extracting a predetermined feature Feature extraction system for extracting a predetermined feature

1975-12-11

1977-05-10

McGraw, Vincent P.

Optics: measuring and testing

Range or remote distance finding

With photodetection

250458, 356 75, 356 88, 356 94, 356 96, G01J 330, G01J 342

Patent

active

040225291

ABSTRACT:
A fluorescence spectrophotometer in which the optical system for the excitation monochromator includes an arrangement for forming an image of the exit slit of the monochromator adjacent a first surface of the sample being evaluated and for forming an aperture image adjacent a second surface of the sample. Fluorescence from the sample is directed to an emission monochromator which likewise has an arrangement for forming an image of the emission monochromator's entrance slit adjacent a third surface of the sample and for forming an aperture image adjacent a fourth surface. The optical components are arranged such that the images of the slits lie in a single plane defined by the axial rays of the excitation and fluorescence beams, and in several advantageous arrangements the slit images are oriented at 90.degree. from the slits themselves. The intensity of the output signal may be further increased by locating mirrors behind the sample holder to direct the light back through the sample for a second pass.

REFERENCES:
patent: 3516744 (1970-06-01), Hinman et al.
patent: 3520614 (1970-07-01), Goldstein
patent: 3825762 (1974-07-01), White
patent: 3975098 (1976-08-01), West

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