Laser speckle interferometric system and method for mobile devices
AssigneeSamsung Electronics Co., Ltd.
InventorsAlexander Viacheslavovich Shcherbakov, Alexey Dmitrievich Lantsov
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Abstract
The laser speckle interferometric system includes a memory for storing a measurement result of a correction parameter and models for matching a result of processing the speckle pattern to the parameters of the object and a processor for stabilizing the speckle pattern detected by controlling a condition for detecting the speckle pattern in real time, processing a time-varying function representing a temporal change in the speckle pattern based on the speckle pattern and the parameters and generating data indicating tested parameters.
Claims29
A laser speckle interferometric system for a mobile device, the laser speckle interferometric system configured to monitor one or more parameters of an object, the system comprising:
- a laser light source configured to emit a laser beam to the object;
- a detector configured to receive the laser beam that is emitted to and scattered by the object, and detect at least one speckle pattern from the received laser beam, said speckle pattern being representative of a first biological activity of the object;
- a memory configured to store a measurement result of a correction parameter and one or more predetermined patterns for matching a result of processing the speckle pattern to the one or more parameters of the object;
- a processor configured to process the speckle pattern of the first biological activity that is detected from the received laser beam;
- and
- a controller configured to control a light intensity distribution and a radius of the speckle pattern in real time so that a ratio of an average light intensity to a maximum light intensity of the speckle pattern is greater than a predetermined value and the radius of the detected speckle pattern is within a predetermined range by adjusting a feedback signal between the laser light source and the detector and an output power of a subsequent laser light source,
- wherein
- the processor stabilizes the detected speckle pattern, while the speckle pattern is being measured, by monitoring a center of the speckle pattern,
- determines a time-varying function for processing the stabilized speckle pattern and representing a temporal change in the speckle pattern of the first biological activity according to a change in the one or more parameters of the object to ascertain a second biological activity of the object in which vibrational components of the object are removed, generates data representing the one or more parameters corresponding to the second biological activity of the object, and displays the data representing the one or more parameters in numerical form to a user.
A method of monitoring one or more parameters of an object by using a laser speckle interferometric system for a mobile device, the method comprising:
- emitting a laser beam to the object;
- receiving the laser beam that is emitted to and scattered by the object;
- detecting a speckle pattern as an image from the received laser beam, said speckle pattern being representative of a first biological activity of the object;
- processing the speckle pattern of the first biological activity that is detected from the received laser beam;
- and
- controlling a light intensity distribution and a radius of the speckle pattern in real time so that a ratio of an average light intensity to a maximum light intensity of the speckle pattern is greater than a predetermined value and the radius of the detected speckle pattern is within a predetermined range by adjusting a feedback signal between the laser light source and a detector and an output power of a subsequent laser light source,
- wherein the processing of the speckle pattern comprises:
- stabilizing, while the speckle pattern is being measured, the speckle pattern by monitoring a center of the speckle pattern and controlling a radius of the speckle pattern;
- determining a time-varying function used to process the stabilized speckle pattern and representing a temporal change in the speckle pattern of the first biological activity according to a change in the one or more parameters of the object to ascertain a second biological activity of the object in which vibrational components of the object are removed;
- generating data representing the one or more parameters corresponding to the second biological activity of the object;
- and
- displaying the data representing the one or more parameters in numerical form to a user.
Dependencies are inferred from the claim text.