Sanofi
OPTICAL CONFIGURATION OF A MEDICAMENT RESERVOIR OF A DRUG DELIVERY DEVICE

Abstract:

Implementations of the present disclosure are directed to a drug delivery device including a reservoir, a stopper, and a light emitting-detecting system. A reservoir includes a wall defining a proximal end and a distal end. A stopper includes an optically reflecting element. The stopper is configured to expel a portion of a medicament stored within the reservoir by moving within the reservoir in a direction from the distal end to the proximal end, such that a stopper position is indicative of an amount of the medicament within the reservoir. A light emitting system is configured to provide a light signal towards the stopper from the distal end. A light detection system is configured to detect a reflected light signal provided by a reflection of the light signal on the optically reflecting element of the stopper and to provide an electric signal in response to detecting the reflected light signal.