BIOMETRIC OBJECT SENSOR AND METHOD
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Accused Products
Abstract
A biometric image sensor system and method is disclosed which may comprise a first light source having a first wavelength λ1, a second light source having a second wavelength λ2, a photodetector configured and positioned to receive light of the first wavelength λ1 and light of the second wavelength λ2 reflecting from a biometric object being imaged and to produce a first output indicative of the amount of reflectance of the light of the first wavelength λ1 and a second output indicative of the amount of reflectance of the light of the second wavelength λ2, and a computing device configured to compare the difference between the first output and the second output with an authenticity threshold.
9 Citations
92 Claims
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1-72. -72. (canceled)
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73. A biometric image sensor comprising:
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a first light source having a first wavelength λ
1;a second light source having a second wavelength λ
2;a photodetector configured and positioned to receive light of the first wavelength λ
1 and light of the second wavelength λ
2 reflecting from a biometric object being imaged and to produce a first reflectivity output indicative of the amount of reflectance of the light of the first wavelength λ
1 and a second reflectivity output indicative of the amount of reflectance of the light of the second wavelength 22; anda computing device configured to compare the difference between the first reflectivity output and the second reflectivity output over multiple samples to detect a periodic presence of oxygenated blood. - View Dependent Claims (74, 75, 76, 77, 78, 79, 80)
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81. A method of sensing an image of a biometric object comprising:
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directing a first light source having a first wavelength λ
1 on the biometric object;directing a second light source having a second wavelength λ
2 on the biometric object;detecting the light of the first wavelength λ
1 and the light of the second wavelength λ
2 reflecting from the biometric object being imaged and producing a first reflectivity output indicative of the amount of reflectance of the light of the first wavelength λ
1 and a second reflectivity output indicative of the amount of reflectance of the light of the second wavelength 22; andcomparing, via a computing device, the difference between the first reflectivity output and the second reflectivity output over multiple samples to detect a periodic presence of oxygenated blood. - View Dependent Claims (82, 83, 84, 85, 86, 87, 88)
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89. A biometric image sensor comprising:
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a light source configurable to emit a first wavelength λ
1 of light and a second wavelength λ
2 of light;a photodetector configurable and positionable to receive one or more electromagnetic radiation wavelengths reflected from a surface in response to the first wavelength λ
1 and the second wavelength λ
2 wherein the reflected electromagnetic radiation is reflecting from a biometric object being imaged to produce a first reflectivity output indicative of the amount of reflectance of the first wavelength λ
1 of light and a second reflectivity output indicative of the amount of reflectance of the second wavelength λ
2 of light; anda computing device configured to compare the difference between the first reflectivity output and the second reflectivity output over multiple samples to detect a periodic presence of oxygenated blood. - View Dependent Claims (90, 91, 92)
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Specification