Apparatus for measuring optical density in situ
AssigneeSociete Nationale Elf Aquitaine
InventorMax Sagner
Life of this patent
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Abstract
A device for measuring in situ, the optical density of a sample in a medium, in which the immersed sample has a main part with a slot at one end. A mobile part can be lodged in this slot. This mobile part has an open chamber which moves with the mobile part into the slot. This open chamber will contain a sample and will be aligned with an optical device in the housing, when moved into the slot. The mobile part and open chamber are, therefore, movable between an open position in which the medium to be studied circulates in the chamber, to a closed position when the mobile part is lodged in the slot whereat the open chamber is isolated from the medium to be studied. Measurement is carried out while the device is in the closed position by measuring the optical density of the isolated medium.
Claims13
A device for measuring the optical density in situ of a medium comprising:
- a main part forming the body of the device, a housing being provided in the main part, the housing being located in the medium;
- a movable part which can be housed in said housing and in which an open cavity is provided, the cavity being open to the outside of the movable part via at least two opposite orifices;
- optical means in the main part on both sides of the housing for conducting a light flux from a source to a light analyzer through optical surfaces located on both sides of the housing;
- and
- means for shifting the movable part from an open position in which the medium to be studied circulates freely in the cavity of the movable part and the housing to a closed position in which the movable part is positioned within the housing of the main part, such that an interior of the housing, the cavity and contents thereof are isolated from the medium, the contents of the cavity constituting the sample of the medium to be analyzed, on which sample the measurement will be performed, the optical means being aligned with the orifices of the movable part when the movable part is in the closed position such that the light flux passes through the contents of the cavity and the contents of the cavity are isolated form the medium.
Dependencies are inferred from the claim text.