DEVICE FOR METROLOGICAL MONITORING OF THE STATE OF OPTICAL FLOWMETRY DEVICES Russian patent published in 2022 - IPC G01N21/17 G02F1/19 A61B5/26 

FIELD: medical technology.

SUBSTANCE: invention relates to medical technology, namely to devices for metrological monitoring of the state of optical flowmetry devices simulating low-frequency oscillatory processes of microhemodynamics recorded by photoplethysmography devices. The device is a layered structure made of various solid materials with different light-scattering optical properties, containing fixed upper and lower layers and a middle layer placed between them. The lower layer is a fluoroplastic base. The middle layer is an optical filter film with time-constant light scattering properties and an absorption index that varies for different wavelengths of light. The upper layer is an electrochromic liquid crystal film capable of changing its transparency under the action of applied voltage, made with the possibility of connecting to a generator of variable electrical signals complexly modulated in amplitude.

EFFECT: increase in the stability of the device over time according to its characteristics with a light-scattering layer that provides simulating low-frequency rhythms of microhemodynamics in a wide frequency range.

3 cl, 4 dwg