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Imaging device, biometric authentication device, and semiconductor laser

An imaging device and semiconductor technology, which is applied in the direction of semiconductor lasers, optical waveguide semiconductor structures, lasers, etc., can solve the problems of low imaging accuracy and reduced imaging accuracy, and achieve the effect of suppressing the size and cost of the device and improving imaging accuracy

Inactive Publication Date: 2018-07-31
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the imaging accuracy is lowered, resulting in lower imaging accuracy

Method used

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  • Imaging device, biometric authentication device, and semiconductor laser
  • Imaging device, biometric authentication device, and semiconductor laser
  • Imaging device, biometric authentication device, and semiconductor laser

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0025] (Composition of camera device)

[0026] An imaging device according to the present invention is an imaging device that captures a user's living body for biometric authentication. Specifically, of the light irradiated to the living body, the living body of the user is imaged using reflected light scattered and returned inside the living body. A living body as an imaging target is a part including living body information, for example, a finger, a palm, or the like. The imaging device can acquire biometric information such as vein patterns of fingers or palms, or fingerprints or palmprints by imaging a part containing biometric information.

[0027] In the following, the case of obtaining the vein pattern of the palm by photographing the palm of the user is taken as an example, refer to figure 1 An imaging device according to an embodiment of the present invention will be described. figure 1 It is a schematic diagram showing the imaging device 1 according to this embodi...

no. 2 approach

[0050] In general, when a semiconductor laser is used in a living space, there is a possibility of endangering a living body such as a user's retina. Here, the light source 2 used in the imaging device 1 according to the present embodiment is constituted by an eye-safe laser in order to ensure the safety to the user's living body, especially the safety to the eyes.

[0051] (composition of light source)

[0052] For the light source 2 related to this embodiment, refer to Figure 3 to Figure 5 Be explained. image 3 is an external view showing the light source 2, Figure 4 showing the scattering of light within the diffusing member 6 of the light source 2, Figure 5 The surface shape of the diffusion member 6 of the light source 2 is shown.

[0053] Such as image 3 As shown, the light source 2 has a semiconductor laser chip, a diffusion member 6 , a stem 7 , a cap 8 and pins 9 , which are not shown. The base 7 is a part forming a base, and a cap 8 is fixed to one end sur...

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PUM

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Abstract

Provided is an imaging device whereby imaging accuracy can be improved while cost and device size are suppressed. An imaging device (1) that comprises: a light source (2) that is a semiconductor laserthat emits infrared light on an imaging target (5); a polarizing filter (3) that blocks light reflected from the surface of the imaging target (5) and transmits light reflected from the inside of theimaging target (5); and an imaging element (4) that receives the light that has been transmitted through the polarizing filter (3) and captures an image of the imaging target (5).

Description

technical field [0001] The present invention relates to an imaging device for imaging a part including biometric information, a biometric authentication device having the imaging device, and a semiconductor laser used in the imaging device. Background technique [0002] In recent years, biometric authentication technology for authenticating users using biometric information such as palm or finger vein patterns, fingerprints, and palm prints is being developed. In a biometric authentication device using such a biometric authentication technology, as a method of obtaining biometric information, a method of obtaining biometric information by imaging a biometric body with light such as transmitted light and reflected light is exemplified. [0003] When imaging a living body such as veins located under the skin, diffused light that diffuses and returns inside the palm or finger is used among the reflected light. In this case, since the surface reflected light reflected by the sk...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00A61B5/1171H01S5/022G06V10/145G06V40/145H01S5/0239
CPCH01S5/02212H01S5/22A61B5/1172A61B5/1171G06T1/0007H01S5/02257G06V40/45G06V10/145G06V40/145H01S5/0239G06V40/14
Inventor 伊藤晋土田和弘村田彻山本宏明有吉章宫嵜启介曾田义树
Owner SHARP KK