Abstract: The invention relates to an optical sensor system, which is designed to interact with a mobile computer device, which has at least one light source and at least one camera, wherein the sensor system has at least one incoupling interface for coupling light from the light source of the computer device into the sensor system and at least one outcoupling interface for coupling light from the sensor system out to the camera of the computer device, wherein the sensor system has at least one optical light-guiding path, by means of which the outcoupling interface is optically connected to the incoupling interface, wherein at least one sensor designed to modify the light guided by the light-guiding path according to a physical quantity influencing the sensor system from outside is arranged in the light-guiding path, wherein at least one sensor designed to modify the light guided by the light-guiding path according to an influencing quantity influencing the sensor system from outside is arranged in the light-guiding pa

Abstract: The invention mimes to an optical sensor system, which is designed to interact with a mobile computer device, which has al least one light source and at least one camera, wherein the sensor system has at least one incoupling interface for coupling light from the light source of the computer device into the sensor system and at least one outcoupling interface for coupling light from the sensor system out to the camera of the computer device, wherein the sensor system has at least one optical light-guiding path, by means of which the outcoupling interface is optically connected to the incoupling interface, wherein at least one sensor designed to modify the light guided by the light-guiding path according to a physical quantity influencing the sensor system from outside is arranged in the light-guiding path, wherein at least one sensor designed to modify the light guided by the light-guiding path according to an influencing quantity influencing the sensor system from outside is arranged in the light-guiding path

Abstract: A sensor (1) has a light conductor (2) having a grating (FBG), a cavity (5), and a transparent cavity end wall (4), a light emitter for directing light through the conductor, and a light detector for detecting reflected light, and a processor. The processor is adapted to analyse light reflected due to the grating (FBG, 6) to determine an indication of temperature, light reflected from the end (7) of the cavity (5) to determine an indication of pressure, and also light reflected from the outer surface (8) of the cavity wall (4) to determine an indication of refractive index of a medium outside said cavity wall. The processor may use one output to compensate another, for example pressure and temperature may be used to compensate for variation in refractive index.

Abstract: A pressure sensor (10 for medical applications comprises a silica optical fiber extrinsic Fabry-Perot interferometric (EFPI) pressure sensor (2) and an in-fiber Bragg grating (FBG, 3). The cavity of the EFPI pressure sensor (2) is formed by the end face of the FBG (3), a glass capillary (5) and a glass diaphragm (6). The glass diaphragm (6) is secured in place by a fusion splice (7) and the glass capillary (5) by a fusion splice (8). As illustrated, incident light is directed into the FBG 3 and there are reflections in the EFPI pressure sensor (2). Applied pressure causes a deflection of the glass diaphragm (6) and hence modulation of the EFPI sensor (2) cavity. The FBG (3) is used as a reference sensor to eliminate temperature cross-sensitivity of the EFPI pressure sensor (2). The EFPI cavity was fabricated using a 200 ?m silica glass fiber, a 133/220 ?m (inner/outer diameter) silica glass capillary and a standard telecommunication FBG.

Abstract: A pressure sensor (10 for medical applications comprises a silica optical fiber extrinsic Fabry-Perot interferometric (EFPI) pressure sensor (2) and an in-fiber Bragg grating (FBG, 3). The cavity of the EFPI pressure sensor (2) is formed by the end face of the FBG (3), a glass capillary (5) and a glass diaphragm (6). The glass diaphragm (6) is secured in place by a fusion splice (7) and the glass capillary (5) by a fusion splice (8). As illustrated, incident light is directed into the FBG 3 and there are reflections in the EFPI pressure sensor (2). Applied pressure causes a deflection of the glass diaphragm (6) and hence modulation of the EFPI sensor (2) cavity. The FBG (3) is used as a reference sensor to eliminate temperature cross-sensitivity of the EFPI pressure sensor (2). The EFPI cavity was fabricated using a 200 ?m silica glass fiber, a 133/220 ?m (inner/outer diameter) silica glass capillary and a standard telecommunication FBG.