Optics: measuring and testing – Oil testing
Patent
1974-12-30
1977-07-19
McGraw, Vincent P.
Optics: measuring and testing
Oil testing
250226, 356100, 356101, G01J 340, G01J 312
Patent
active
040365581
ABSTRACT:
The invention provides a focalization process of spherical concave diffraction gratings, working by reflection for the dispersion of various radiations constituting a polychromatic light, in which fixed entrance and exit slits are used and in which only a certain rotation is imparted to the grating, the rotation is imparted to the grating in such a way as to make the radiations move in the exit slit. For a certain ruled width of a given grating and a given resolution, the sum of the object and image tangential focal length equations has a value .epsilon. different from zero and determined in function of the aberrations furnished by a concave grating corresponding to the retangular port.
REFERENCES:
patent: 2750836 (1956-06-01), Fastie
patent: 3090863 (1963-05-01), McPherson
patent: 3418051 (1968-12-01), Staunton
patent: 3628849 (1971-12-01), Flamand et al.
patent: 3730626 (1973-05-01), Cruvellier et al.
"Monochromateur Pour la Region 400A-3000A;" Pouey et al.; Revue d'Optique, Sept. 1965, pp. 446-458.
"Design...Monochromators", M. Pouey, Optics Communications vol. 3, No. 4, June 1971, pp. 201-204.
Etablissement Public: Agence Nationale de Valorisation de Recher
McGraw Vincent P.
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