Patent ID: 8422142
Filing Date: 2013-04-16
Classification: G02B

Abstract:
1. A device having a membrane and a support defining a cavity containing a substantially constant quantity of a fluid, where the membrane includes an anchoring area peripheral to the support, a central area able to be deformed reversibly when a displacement of fluid occurs and an actuation area between the anchoring area and the central area, together with means of actuation intended to apply stress to the membrane in the actuation area and to cause a displacement of the fluid to the central area when an actuation occurs, characterised in that the cavity has a main chamber at the level of the central area and a peripheral chamber at the level of the actuation area communicating with the main chamber, and in addition the peripheral chamber includes at least one forced flow structure communicating with the main chamber to favour the flow of at least a part of the fluid from the peripheral chamber to the main chamber or vice versa when an actuation occurs, wherein the remainder of the fluid is displaced from the peripheral chamber to the main chamber, or vice versa, without passing through the forced flow structure, and wherein a given forced flow structure has no fastenings both to the support and to the membrane.