Centre National De La Recherche Scientifique

Université Paris—sud

Force-a

Yves Goulas

Zoran Cerovic

Jean-Luc Ayral

Nicolae Moise

Gwendal Latouche

Ismaël Moya

Ismaeel Moya

A device for analyzing plants, by luminous excitation and fluorescence measurement, can be used on site without preparation of the plants. The device evaluates the content of a compound in the skin or epidermis of a plant. The geometry of the device is characterized by a direction of the excitation light rays and a direction of the fluorescence light rays which are non-collinear with each other. The device includes several sets of emitters of different wavelengths, each including several emitters, and makes it possible to measure a plurality of excitation-fluorescence combinations. A method for evaluating and monitoring the development and maturity of a crop, as well as a method for monitoring and controlling plant treatment are also described.

In-situ plant analysis apparatus, method for tracking the state or evolution of a culture and method for managing vegetable processing

A method and a system for jointly determining the content of a first chromophorous and fluorescent compound and a second chromophorous compound in a biological tissue (). The determination of the content of the chromophorous and fluorescent compound () is carried out by optical measurement of the differential absorption of this chromophorous and fluorescent compound () and the determination of the content of the second chromophorous compound () is carried out by optical measurement of the fluorescence of the chromophorous and fluorescent compound (). Optical radiations (-) are utilized which are suitably chosen in combination with at least one operation of filtering these radiations suited to using single detection () and measurement element for the two determinations.

Method and device for characterizing biological tissue

A device includes an element () for illuminating the sample (), alternately emitting first and second radiation beams; device () for receiving and analyzing radiation derived from the sample () which converts the output radiation into control signal (S); monitoring and controlling device () emitting first (S) and second (S) signals controlling the illuminating means (), and a measuring signal (Sm); and device for calculating absorption characteristics of the sample (), on the basis of the measuring signal (Sm). The monitoring and control elements () are adapted so that, after at least one period (Tp) of variation of the radiation beams, the amplitude of the control signal (S), sensed on emitting phases, is equal to the amplitude of the control signal (S), sensed on emission phases of the other radiation, and the measuring signal (Sm) represents at least one of the control signals (S, S).

Device for measuring light absorption characteristics of a biological tissue sample

Growing community of inventors

Le Plessis Robinson, France

Yves Goulas