Optical speckle pattern investigation
AssigneeKoninklijke Philips Electronics N.V.
InventorsCristian Presura, Coen Theodorus Hubertus Fransiscus Liedenbaum, Antonius Hermanus Maria Akkermans
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Abstract
A method for investigating and ascertaining pulse or heartbeat includes directing illuminating radiation to illuminate a body part such as a finger. The illuminating radiation is of a wavelength or wavelength band substantially in the blue light region of the light spectrum. Then, an optical speckle pattern of the illuminated body part resulting from the illumination of the body part is obtained and imaged. The optical speckle pattern is representative of the heartbeat and by correlation of frames extracted from the speckle pattern, the pulse or beat extent of the body part may be ascertained.
Claims16
A method for investigation of or ascertaining pulse or heartbeat, the method comprising the acts of:
- directing illuminating radiation to illuminate a body part, the illuminating radiation being of a wavelength or wavelength band substantially in the blue light region of the spectrum;
- imaging an optical speckle pattern of the illuminated body part, resultant from the illumination of the body part;
- and
- processing by a processor optical speckle pattern image data to ascertain a pulse or a heartbeat extant for the body part.
An investigation system for investigating a body part, the investigation system comprising:
- an illuminating radiation delivery arrangement, for directing illuminating radiation to the body part the illuminating radiation being of a wavelength or wavelength band substantially in the blue light region of the spectrum;
- an image capture arrangement for capturing an optical speckle pattern image of the illuminated body part, resultant from the illumination of the body part;
- and
- a processor to process image data from the image capture arrangement, wherein the image data is processed to ascertain a pulse or a heartbeat extant for the body part.
An investigation system for investigating a body part, the investigation system comprising:
- an illuminating radiation delivery arrangement, for directing illuminating radiation to the body part;
- an image capture arrangement for capturing an optical speckle pattern image of the illuminated body part, resultant from the illumination of the body part;
- a processor configured to process image data from the image capture arrangement, wherein the image data is processed to compare the captured optical speckle pattern of the body part with a reference speckle pattern in order to ascertain identity for an owner of the body part, wherein the processor is further configured to process optical speckle pattern image data from the image capture arrangement to ascertain a pulse or heartbeat exhibited by the body part in order to confirm that the owner of the body part is alive.
A method for investigation of a body part in order to ascertain identity for the owner of the body part, the method comprising the acts:
- directing illuminating radiation to illuminate the body part;
- imaging an optical speckle pattern of the illuminated body part, resultant from the illumination of the body part;
- processing by a processor optical speckle pattern image data to compare the optical speckle pattern of the body part with a reference speckle pattern in order to ascertain identity for an owner of the body part, including ascertaining a pulse or heartbeat exhibited by the body part in order to confirm that the owner of the body part is alive.
Dependencies are inferred from the claim text.