Device for the optical inspection of a fluid, especially for hem

Details Device for the optical inspection of a fluid, especially for hem Device for the optical inspection of a fluid, especially for hem

1996-05-24

1998-03-24

Snay, Jeffrey

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

422 8205, 422 8208, 356 73, G01N 2164

Patent

active

057309418

ABSTRACT:
It includes a measuring space (8) comprising a constrained passage (15) for the fluid, a monochromatic light source (31) delivering a beam (F1) to optical elements (6, 32, 34) including a first diffractive optical element (32) having a diffractive network (38) predetermined as a function, on the one hand, of the characteristics of the source and, on the other hand, of chosen geometrical and spectral characteristics for the illumination of the constrained passage, and suitable for inducing fluorescence of at least part of the fluid, and first (19-20), second (34-36) and third (40) optoelectronic elements intended to collect, respectively, a transmitted beam, fluorescence and a diffracted beam, and suitable for delivering to an analysis unit (24) signals relating to the contents of the beams. At least one of the beams emanates from a second diffractive optical element (42) having a second diffractive optical network which is predetermined as a function of a frequential and geometrical transfer function of at least one of the optoelectronic elements.

REFERENCES:
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patent: 5027359 (1991-06-01), Leger et al.
patent: 5029975 (1991-07-01), Pease
patent: 5138181 (1992-08-01), Lefevre et al.
patent: 5142140 (1992-08-01), Yamazaki et al.
Skupsky et al., "Speckle-Free Phase Plate (diffuser) for Far-Field Applications" Journal of Applied Physics, vol. 74, No. 7, (1993), 4310-4316.

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