A tensiographic drophead

G - Physics – 01 – N

Patent

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Details

G01N 21/43 (2006.01) G01N 1/00 (2006.01) G01N 3/02 (2006.01) G02B 6/00 (2006.01)

Patent

CA 2604096

A tensiographic drophead comprises a quartz body (10) having a terminal surface (18) with a peripheral drop suspension edge (20). A liquid feed bore (14) extends through the body for supplying a liquid to the terminal surface to form a drop (32) whose outer edges are suspended from the suspension edge (20). At least two light guides (26, 28) extend through the body for respectively transmitting light into and collecting light reflected internally from the drop. The light guides terminate above the plane containing the suspension edge such that the intensity of the reflected light has a significant second order reflection peak.

La présente invention concerne une tête de formation de goutte tensiographique qui comprend un corps en quartz (10) ayant une surface terminale (18) avec une extrémité de suspension de goutte périphérique (20). Un tube d~alimentation en liquide (14) parcourt tout le corps pour fournir un liquide à la surface terminale afin de produire une goutte (32) dont les bords extérieurs sont suspendus depuis l~extrémité (20). Au moins deux guides de lumière (26, 28) parcourent tout le corps pour transmettre respectivement la lumière à la goutte et recueillir celle réfléchie de manière interne par celle-ci. Les guides de lumière s~arrêtent au-dessus du plan contenant l~extrémité de suspension de sorte que l~intensité de la lumière réfléchie présente un pic de réflexion de second ordre conséquent.

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