Replaceable prism for applanation tonometer

Details Replaceable prism for applanation tonometer Replaceable prism for applanation tonometer

A - Human Necessities

61

B

A61B 3/16 (2006.01)

Patent

CA 2441513

A tonometer (70, 80, 90), preferably for a single use, has an applanation surface (12), an input port (15) arranged to transmit incoming light into the prism, and an output port (16) arranged to transmit outgoing light from the prism. Light entering the input port is directed in an unreflected straight path through the prism to an internal face of the applanation surface. Light internally reflected from the applanation surface proceeds in an unreflected straight path through the prism to the output port.

L'invention concerne un prisme de tonomètre, de préférence à usage unique, présentant une surface d'aplanation, un port d'entrée adapté pour l'émission d'une lumière incidente sur le prisme, et un port de sortie adapté pour l'émission d'une lumière de sortie sortant du prisme. La lumière entrant dans le port d'entrée est dirigée selon une trajectoire rectiligne non réfléchie à travers le prisme sur une face interne de la surface d'aplanation. La lumière réfléchie intérieurement provenant de la surface d'aplanation, suit une trajectoire rectiligne non réfléchie à travers le prisme jusqu'au port de sortie.

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