Abstract: An optical arrangement of data smart glasses includes a first laser device configured to emit a projection light beam, a second laser device configured to emit a measuring light beam, a first scanner, a second scanner, and a beam combiner configured to bundle the projection light beam and the measuring light beam into a common light beam, wherein the first scanner is configured to deflect the projection light beam emitted by the first laser device in a first axis, and wherein the second scanner is configured to deflect the common light beam focused by the beam combiner in a second axis.

Abstract: A device for monitoring an eye position of a user's eye in a virtual retinal display. The device includes a laser projector unit generating a collimated scanned infrared laser beam, and an optical system optically guiding the scanned infrared laser beam to the user's eye. The optical system includes an optical element for the scanned infrared laser beam to pass through, or diverting the scanned infrared laser beam. The optical element forms a region in which the collimation of the infrared laser beam is maintained, to generate a bright pupil effect and/or a retina speckle pattern. The optical element forms a second region in which the infrared laser beam is focused on an iris of the user's eye, a center of the user's eye, or a cornea of the user's eye, to generate a glint.

Abstract: A method for generating an activation signal for a warning display of a user of smart glasses. First surroundings sensor signals from the rear and/or lateral surroundings of the user of the smart glasses are received using a processing unit. At least one object in the rear and/or lateral surroundings of the user of the smart glasses is detected as a function of the received first surroundings sensor signals. Second surroundings sensor signals are received as a function of the detected object. First and second motion signals of the user are received. A first movement trajectory of the detected object and a second movement trajectory of the smart glasses user are ascertained. A likelihood of a collision of the user of the smart glasses with the detected object is ascertained as a function of the ascertained first and second movement trajectories.

Abstract: A method for ascertaining a viewing direction of an eye. A laser beam emitted by a laser source is passed over at least two scanning points on the eye, using a reflection element and a deflecting element. A self-mixing effect of the scanning laser beam reflected by the eye into the laser source is used, in order to determine, for the at least two scanning points, the optical path length from the laser source to the at least two scanning points on the surface of the eye and/or a reflectivity of the eye at the at least two scanning points.

Abstract: A method for a user activity recognition for data glasses. The data glasses include at least one integrated sensor unit. An activity of a user of the data glasses is recognized, via an evaluation of data that are detected by the integrated sensor unit, in at least one user activity recognition step carried out by a classifying unit. It is provided that when the user activity recognition step is carried out, the classifying unit takes into account information that has been ascertained in a (preferably) user-specific training step chronologically preceding the user activity recognition step, by training the classifying unit.

Abstract: An optical arrangement of data smartglasses includes a first laser device configured to emit a projection light beam, a second laser device configured to emit a measuring light beam, a first scanner, a second scanner, and a beam combiner configured to bundle the projection light beam and the measuring light beam into a common light beam, wherein the first scanner is configured to deflect the projection light beam emitted by the first laser device in a first axis, and wherein the second scanner is configured to deflect the common light beam focused by the beam combiner in a second axis.

Abstract: The invention relates to an eye tracking arrangement that includes a camera configured to capture images of an eye at a first scanning rate, a laser velocimeter configured to capture an eye velocity of a movement of the eye by laser Doppler velocimetry at a second scanning rate and a control device configured to determine an absolute eye position based on the images, and track a gaze direction of the eye based on the absolute eye position and the eye velocity.

Abstract: A method for a user activity recognition for data glasses. The data glasses include at least one integrated sensor unit. An activity of a user of the data glasses is recognized, via an evaluation of data that are detected by the integrated sensor unit, in at least one user activity recognition step carried out by a classifying unit. It is provided that when the user activity recognition step is carried out, the classifying unit takes into account information that has been ascertained in a (preferably) user-specific training step chronologically preceding the user activity recognition step, by training the classifying unit.

Abstract: A sensor arrangement for attachment to a head of a user. The sensor arrangement includes at least one first electrical sensor and/or at least one second optical sensor. The sensor arrangement further comprises a support structure designed to support the first sensor and/or second sensor on the head of the user such that the first sensor and/or second sensor is arranged in an area of the ear. The sensor arrangement further includes at least one connecting element made of an elastic material for the purpose of at least indirect connection between the first sensor and/or second sensor and the scalp of the user.

Abstract: A cardiac assist system having a pumping device for moving blood, wherein a pumping capacity of the pumping device is adjustable using an adjustment signal based on laser doppler with an optical fiber. A measuring device measures a flow rate of the body fluid, the measuring device comprising at least one light source for outputting a light beam and at least one sensor element for detecting a reflected partial beam of the light beam. The measuring device is adapted to measure the body fluid using the reflected partial beam of the light beam. A determination device is adapted to determine the adjustment signal using the measurement signal. The device may include a bore opening to a blood flow channel, with an optical fiber extending through the bore.

Abstract: A method for operating smart glasses includes an input unit and/or output unit and a gaze detection arrangement, wherein the gaze detection arrangement detects any eye movement of an eye including the steps of irradiating at least one wavelength-modulated laser beam to the eye, detecting an optical path length of the emitted laser beam based on laser feedback interferometry of the emitted laser radiation with backscattered radiation from the eye, detecting a Doppler shift of the emitted and backscattered radiation based on the laser feedback interferometry, and detecting an eye velocity based on the Doppler shift, and wherein the input unit and/or output unit is operated based on the optical path length and/or the eye velocity.

Abstract: A method for detecting a gaze direction of an eye includes the steps of irradiating at least one wavelength-modulated laser beam onto an eye, detecting an optical path length of the emitted laser beam based on laser feedback interferometry of the emitted laser radiation with a backscattered radiation from the eye, detecting a Doppler shift of the emitted radiation and the backscattered radiation based on the laser feedback interferometry, detecting an eye velocity based on the Doppler shift, and detecting an eye movement of the eye based on the optical path length and the eye velocity.

Abstract: Disclosed is a minimally invasive miniaturized percutaneous mechanical circulatory support system. The system may be placed across the aortic valve via a single femoral arterial access point. The system includes a low profile axial rotary blood pump carried by the distal end of a catheter. The system can be percutaneously inserted through the femoral artery and positioned across the aortic valve into the left ventricle. The device actively unloads the left ventricle by pumping blood from the left ventricle into the ascending aorta and systemic circulation. A magnetic drive and encased motor housing allows for purgeless operation for extended periods of time to treat various ailments, for example more than six hours as acute therapy for cardiogenic shock.

Abstract: A minimally invasive miniaturized percutaneous mechanical circulatory support system for transcatheter delivery of a pump to the heart that actively unloads the left ventricle by pumping blood from the left ventricle into the ascending aorta and systemic circulation. The pump may include a tubular housing, a motor, an impeller configured to be rotated by the motor. The impeller may be rotated by the motor, via a shaft with an annular polymeric seal around the shaft, or via a magnetic drive. The system may have an insertion tool having a tubular body and configured to axially movably receive the circulatory support device, and an introducer sheath configured to axially movably receive the insertion tool.

Abstract: Disclosed is a mechanical circulatory support system for transcatheter delivery to the heart, having a removable guidewire aid to assist with inserting the guidewire along a path that avoids a rotating impeller. The system may comprise a catheter shaft and a circulatory support device carried by the shaft. The device may comprise a tubular housing, an impeller and the guidewire aid. The guidewire aid may include a removable guidewire guide tube. The guide tube may enter a first guidewire port of the tubular housing, exit the tubular housing via a second guidewire port on a side wall of the tubular housing on a distal side of the impeller, enter a third guidewire port on a proximal side of the impeller, and extend proximally through the catheter shaft.

Abstract: The invention relates to a method for determining at least one flow parameter of a fluid (31) flowing through an implanted vascular support system (10), comprising the following steps: a) estimating the flow velocity of the fluid (31), b) carrying out a pulsed Doppler measurement using an ultrasound sensor (18) of the support system (10) in an observation window (201) inside the support system (10), wherein the observation window (201) is displaced at an observation window velocity which is determined using the flow velocity estimated in Step a), c) determining the at least one flow parameter of the fluid using at least one measurement result of the pulsed Doppler measurement or a measurement result of the pulsed Doppler measurement and the observation window velocity.

Abstract: The invention relates to an eye tracking arrangement that includes a camera configured to capture images of an eye at a first scanning rate, a laser velocimeter configured to capture an eye velocity of a movement of the eye by laser Doppler velocimetry at a second scanning rate and a control device configured to determine an absolute eye position based on the images, and track a gaze direction of the eye based on the absolute eye position and the eye velocity.

Abstract: The approach presented here relates to a determination appliance (100) for determining a viscosity of a fluid. The determination appliance (100) has at least one determination device (110) and a provisioning device (115). The determination device (110) is designed to determine the viscosity of the fluid and/or a rotational speed (?) of a blade wheel (205) for conveying the fluid by using at least one detected volume flow of the fluid and a detected pressure difference of the fluid. The provisioning device (115) is designed to provide or send a viscosity signal (130) representing the viscosity determined by the determination device (110).

Abstract: The approach presented here relates to an analysis device (100) for analyzing a viscosity of a fluid (217). The analysis device (100) comprises a detection device (110) and a provisioning device (115). The detection device (110) is formed to determine the viscosity of the fluid (217) using at least one Doppler parameter of a Doppler spectrum of the fluid (217). The provisioning device (115) is formed to provide or transmit a viscosity signal that represents the viscosity determined by the detection device (110).

Abstract: The invention relates to a method for determining at least a flow velocity or a fluid volume flow (5) of a fluid flowing through an implanted vascular support system (1), comprising the following steps: a) carrying out a pulsed Doppler measurement by means of an ultrasonic sensor (2) of the support system (1), b) evaluating a measurement result from step a), which has a possible ambiguity, c) providing at least one operating parameter of a flow machine (3) of the support system (1), d) determining at least the flow velocity or the fluid volume flow (5) using the measurement result evaluated in step b), wherein the possible ambiguity of the measurement result is corrected using the operating parameter.