Compact biometric authentication device and associated methodology of imaging and detecting living-tissue patterns
First Claim
1. An apparatus, comprising:
- a light emitting unit configured to emit near-infrared source light toward biological tissue;
an imaging sensor configured to detect an image of a blood vessel, which is generated by scattered light scattered at the tissue, the imaging sensor further configured to convert the image to an electrical signal; and
circuitry configured to detect a change in absorbance of the source light in blood in the tissue based on the electrical signal via obtaining a change in frequency between incident light and the scattered light as beat signals by detecting an interference between the incident light and the scattered light,wherein the change in the absorbance of the source light in the blood corresponds to a heart beat, andwherein the circuitry determines whether there is an absence of blood flow based on the detected change in the absorbance of the source light in the blood.
0 Assignments
0 Petitions
Accused Products
Abstract
The apparatus enables biometric authentication without the risk of forgery or the like and enables living-tissue discrimination. The roughness distribution pattern of deep-layer tissue of the skin covered with epidermal tissue is detected, thereby extracting a unique pattern of the living tissue. Biometric authentication is performed based upon the detected pattern. The roughness distribution pattern of the deep-layer tissue of the skin is optically detected using difference in optical properties between the epidermal tissue and the deep-layer tissue of the skin. Long-wavelength light, e.g., near-infrared light, is used as illumination light cast onto the skin tissue. A fork structure of a subcutaneous blood vessel is used as the portion which is to be detected, for example. The portion which is to be detected is determined based upon the structure of the fork structure. The living-tissue discrimination may be made using the subcutaneous blood vessel.
-
Citations
18 Claims
-
1. An apparatus, comprising:
-
a light emitting unit configured to emit near-infrared source light toward biological tissue; an imaging sensor configured to detect an image of a blood vessel, which is generated by scattered light scattered at the tissue, the imaging sensor further configured to convert the image to an electrical signal; and circuitry configured to detect a change in absorbance of the source light in blood in the tissue based on the electrical signal via obtaining a change in frequency between incident light and the scattered light as beat signals by detecting an interference between the incident light and the scattered light, wherein the change in the absorbance of the source light in the blood corresponds to a heart beat, and wherein the circuitry determines whether there is an absence of blood flow based on the detected change in the absorbance of the source light in the blood. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. An apparatus, comprising:
-
a non-transitory computer-readable storage medium including computer executable instructions, where the instructions, when executed by a processor, cause the processor to emit near-infrared source light toward biological tissue, and to detect a change in absorbance of the source light in blood in the tissue based on an electrical signal via obtaining a change in frequency between incident light and the scattered light as beat signals by detecting an interference between the incident light and the scattered light; and an imaging sensor configured to detect an image of a blood vessel, which is generated by scattered light scattered at the tissue, the imaging sensor further configured to convert the image to the electrical signal, wherein the change in the absorbance of the source light in the blood corresponds to a heart beat, and wherein the processor determines whether there is an absence of blood flow based on the detected change in the absorbance of the source light in the blood.
-
-
13. A method comprising:
-
emitting near-infrared source light toward biological tissue; detecting an image of a blood vessel, which is generated by scattered light scattered at the tissue; converting the image to an electrical signal; detecting a change in absorbance of the source light in blood in the tissue based on the electrical signal via obtaining a change in frequency between incident light and the scattered light as beat signals by detecting an interference between the incident light and the scattered light; corresponding the change in the absorbance of the source light in the blood to a heart beat; and determining whether there is an absence of blood flow based on the detected change in the absorbance of the source light in the blood. - View Dependent Claims (14)
-
-
15. An information processing apparatus, comprising:
-
circuitry configured to detect a change in absorbance of a source light in blood in a tissue based on an electrical signal via obtaining a change in frequency between incident light and the scattered light as beat signals by detecting an interference between the incident light and the scattered light, wherein the change in the absorbance of the source light in the blood corresponds to a heart beat, and wherein the circuitry determines whether there is an absence of blood flow based on the detected change in the absorbance of the source light in the blood. - View Dependent Claims (16, 17, 18)
-
Specification