JP2018073345A - Authentication device and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an authentication device for capturing images, the authentication device exhibiting improved image quality.SOLUTION: The authentication device is provided with an image capturing unit and a signal processing unit. In the image capturing unit in the authentication device, arranged are, in order from the object side, a transparent protective layer, a light blocking film provided with a plurality of holes, and image capturing elements provided with photoelectric conversion units in locations corresponding to the plurality of holes. The signal processing unit in the authentication device carries out a prescribed authentication process on the basis of images captured by the image capturing unit.SELECTED DRAWING: Figure 1

Description

  The present technology relates to an authentication device and an electronic apparatus. Specifically, the present invention relates to an authentication device that captures an image and an electronic apparatus.

  Conventionally, in various scenes such as when logging in to a computer or when starting use of a bank ATM (Automatic Teller Machine), biometric authentication technology for identifying an individual using physical features such as fingerprints and veins has been used. Yes. For example, an authentication apparatus that performs fingerprint authentication by imaging a finger with a solid-state imaging device covered with a transparent film has been proposed (see, for example, Patent Document 1).

JP 2007-264958 A

  In the above-described conventional technology, fingerprint authentication is performed using a solid-state imaging device. However, in this prior art, in each pixel in the solid-state image sensor, light from an oblique direction may be mixed with light from directly above, and the image quality of the image may be deteriorated. And there exists a problem that authentication precision falls by the fall of the image quality of the image.

  The present technology has been created in view of such a situation, and an object thereof is to improve the image quality of an image in an authentication device that captures an image.

  The present technology has been made to solve the above-described problems. The first side of the present technology includes, in order from the object side, a transparent protective layer, a light-shielding film provided with a plurality of openings, and the plurality of the plurality of openings. An image pickup unit provided with an image sensor provided with a photoelectric conversion unit at a position corresponding to each of the apertures, and a signal processing unit that performs a predetermined authentication process based on an image picked up by the image pickup unit It is an authentication device. Thereby, the effect | action that an authentication process is performed based on the image imaged with the image pick-up element in which the photoelectric conversion part was provided in the position corresponding to each of several opening is brought about.

  In the first aspect, a transparent body may be further disposed between the light shielding film and the imaging element in the imaging unit. This brings about the effect that the distance between the light shielding film and the image sensor is adjusted.

  In the first aspect, the image sensor includes a plurality of unit cells, the photoelectric conversion unit is disposed in each of the plurality of unit cells, and light from each of the plurality of openings is Light that is incident on the corresponding photoelectric conversion unit and that does not correspond to the photoelectric conversion unit in each of the plurality of unit cells may not be incident on the portion. Thereby, the effect | action that the light from each of several opening is photoelectrically converted is brought about.

  In the first aspect, the size of the photoelectric conversion unit and the size of the opening may be substantially the same. Thereby, the effect | action that the light from the opening in which a size substantially corresponds with a photoelectric conversion part is photoelectrically converted is brought about.

In this first aspect, the unit cell pitch is d, the effective size of the photodetector is p, the distance from the object-side surface of the light shielding film to the photoelectric conversion unit is t, and the protection 0.7 μm ≦ d ≦ 16.0 μm 0.4 μm ≦ p ≦ 15.0 μm p <d where L is the thickness of the layer
It may be an authentication device that satisfies all the expressions of 3 micrometers ≦ t ≦ 2900 micrometers 25 micrometers ≦ L ≦ 2900 micrometers. This brings about the effect that the authentication process is performed by the authentication device that satisfies all the expressions.

  In the first side surface, at least two layers of the light shielding film may be disposed. This brings about the effect | action that a stray light is suppressed.

  In the first aspect, the signal processing unit may compare the captured image with biometric information registered in advance in the predetermined authentication process. Thereby, the effect | action that the imaged image is compared with biometric information is brought about.

  Further, according to the second aspect of the present technology, in order from the object side, a transparent protective layer, a light shielding film provided with a plurality of openings, and a photoelectric conversion unit are provided at positions corresponding to the plurality of openings. The electronic device includes an imaging unit in which the imaging element is disposed, and a signal processing unit that performs predetermined signal processing on an image captured by the imaging unit. Thereby, there is an effect that signal processing is performed on an image picked up by an image pickup device in which a photoelectric conversion unit is provided at a position corresponding to each of the plurality of openings.

  In addition, according to the third aspect of the present technology, in order from the object side, a transparent protective layer, a light shielding film provided with a plurality of openings, and a photoelectric conversion unit are provided at positions corresponding to the plurality of openings. An imaging unit in which the imaging device is arranged, a signal processing unit that performs a predetermined authentication process based on an image captured by the imaging unit, and a display unit that displays a predetermined screen based on a result of the authentication process, An electronic device comprising: Thus, there is an effect that a predetermined screen is displayed based on the result of the authentication process executed based on the image picked up by the image pickup device provided with the photoelectric conversion unit at the position corresponding to each of the plurality of openings.

  According to the present technology, in the authentication device that captures an image, an excellent effect that the image quality of the image can be improved can be achieved. Note that the effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.

It is a block diagram showing an example of 1 composition of electronic equipment in a 1st embodiment of this art. It is an example of the perspective view of the imaging part in 1st Embodiment of this technique. It is an example of the perspective view of the light shielding film, transparent body, and solid-state image sensor in 1st Embodiment of this technique. It is an example of a sectional view of an imaging part in a 1st embodiment of this art. It is a graph which shows an example of the relation between the angle of incidence and sensitivity of a solid-state image sensing device in a 1st embodiment of this art. It is a figure which shows an example of the incident angle of the light from the object point right above a certain opening to the adjacent opening in 1st Embodiment of this technique. It is a graph which shows an example of the optical transfer function in a 1st embodiment of this art. It is a figure which shows an example of the incident angle of the light which injects into the photodetector in 1st Embodiment of this technique. It is an example of the perspective view of the imaging part in 2nd Embodiment of this technique. It is a block diagram showing an example of 1 composition of a lensless microscope in a 3rd embodiment of this art. It is an example of the perspective view of the imaging part in 3rd Embodiment of this technique.

Hereinafter, modes for carrying out the present technology (hereinafter referred to as embodiments) will be described. The description will be made in the following order.
1. 1st Embodiment (example which provided the photodetector for every opening)
2. Second Embodiment (Example in which two light shielding films are stacked and a photodetector is provided for each opening)
3. Third Embodiment (Example in which a photo detector is provided for each opening to enlarge an image)

<1. First Embodiment>
[Configuration example of electronic device]
FIG. 1 is a block diagram illustrating a configuration example of the electronic device 100 according to the first embodiment of the present technology. This electronic device 100 is a device having a function of performing fingerprint authentication and vein authentication, and includes an authentication device 110 and a display unit 120. As the electronic device 100, for example, a smartphone or a personal computer is assumed.

  The authentication device 110 is a device that performs fingerprint authentication or vein authentication and outputs an authentication result, and includes an imaging unit 200, a signal processing unit 111, a control unit 112, and a registration information recording unit 113.

  The imaging unit 200 captures image data of a body part (such as a finger) of the user according to the control of the control unit 112. The imaging unit 200 supplies image data to the signal processing unit 111 via the signal line 209.

  The control unit 112 controls the imaging unit 200 to capture image data. For example, when the power button is pressed or when the touch panel is tapped, the control unit 112 starts imaging.

  The registration information recording unit 113 records biological information such as fingerprints and veins registered in advance.

  The signal processing unit 111 performs predetermined signal processing including authentication processing on the captured image data. In this authentication process, the signal processing unit 111 compares the captured image data with the registration information to determine success or failure of the authentication. Then, the signal processing unit 111 supplies the result of the authentication process to the display unit 120.

The display unit 120 displays a predetermined screen based on the result of the authentication process. For example, when fingerprint authentication is used for unlocking the screen, the display unit 120 switches the display from the lock screen to the initial screen or the like when the authentication is successful.
[Configuration example of imaging unit]

  FIG. 2 is an example of a perspective view of the imaging unit 200 according to the first embodiment of the present technology. The imaging unit 200 includes a cover glass 210, a light shielding film 220, a transparent body 230, and a solid-state imaging device 240. A plate-like transparent body 230 is laminated on the solid-state imaging device 240, a light shielding film 220 is laminated on the transparent body 230, and a plate-like cover glass 210 is laminated on the light shielding film 220. In other words, the cover glass 210, the light-shielding film 220, the transparent body 230, and the solid-state image sensor 240 are arranged in order from the object side. When the user presses a body part (such as a finger) against the cover glass 210, the solid-state imaging device 240 captures image data of the part.

  The cover glass 210 is a layer that protects the surface of the light shielding film 220. In addition, as long as it is a transparent member which can protect the surface, you may use things other than glass, such as PET (Poly-Ethylene Terephthalate) resin. The cover glass 210 is an example of a protective layer described in the claims.

  Hereinafter, a predetermined axis parallel to the image plane of the solid-state image sensor 240 is defined as an X axis, an axis parallel to the plane and perpendicular to the X axis is defined as a Y axis, and an axis perpendicular to the X axis and the Y axis is defined as a Z axis. .

  FIG. 3 is an example of a perspective view of the cover glass 210, the light shielding film 220, the transparent body 230, and the solid-state imaging device 240 according to the first embodiment of the present technology.

  The solid-state image sensor 240 captures image data. For example, a CMOS (Complementary MOS) sensor or a CCD (Charge Coupled Device) sensor is used as the solid-state imaging device 240. A plurality of unit cells 242 are arranged in a two-dimensional lattice pattern on the image plane of the solid-state imaging device 240. The unit cell 242 is a unit constituting the solid-state imaging device 240, and generates pixel data in the image data. Each unit cell 242 is provided with a photodetector 241.

  The photodetector 241 generates an analog electric signal by photoelectrically converting light. For example, a photodiode is used as the photodetector 241. The unit cell 242 converts the electric signal into digital pixel data. Then, data obtained by arranging the pixel data of the unit cells 242 is output as image data. The photodetector 241 is an example of the photoelectric conversion unit described in the claims.

  Here, the shape of the photodetector 241 and the unit cell 242 is, for example, a square, and the area of the unit cell 242 is larger than the area of the photodetector 241.

  Further, it is not necessary to use all of the photodetectors 241 for imaging, and only a part of the plurality of photodetectors 241 may be used for imaging. For example, when reducing the resolution by thinning out pixels, only some of the photodetectors 241 are used. The photo detector 241 used for imaging is hereinafter referred to as “valid” photo detector 241, and the other photo detectors 241 are referred to as “invalid” photo detectors 241.

  The light shielding film 220 is provided with a plurality of openings 221 in a two-dimensional lattice shape. Each opening 221 penetrates the light shielding film 220 along the Z-axis direction, and one opening 221 is arranged for each photodetector 241. With the direction from the image plane to the object as the upward direction, light from directly above the opening 221 passes through the opening 221 and enters the photodetector 241 that forms a pair with the opening 221.

  FIG. 4 is an example of a cross-sectional view of the imaging unit 200 according to the first embodiment of the present technology. In the image plane, the distance between the centers of adjacent unit cells 242 is hereinafter referred to as a cell pitch d. The length of one side of the photodetector 241 in the unit cell 242 is hereinafter referred to as a cell size p. Further, the distance from the object-side surface of the light shielding film 220 to the photodetector 241 is t. The length of the cover glass 210 in the Z-axis direction is defined as a thickness L.

FIG. 5 is a graph illustrating an example of the relationship between the incident angle and sensitivity of the solid-state imaging device 240 according to the first embodiment of the present technology. In the figure, the horizontal axis represents the incident angle R ₁ of the incident light to the pixel, and the vertical axis represents the sensitivity of the pixel to the incident light at the incident angle R ₁ . The sensitivity on the vertical axis is expressed as a ratio to the maximum sensitivity. The unit of the incident angle R ₁ is, for example, “°”, and the unit of sensitivity is, for example, a percentage (%).

In addition, the solid line in FIG. 5 indicates the sensitivity for each incident sensitivity of a solid-state imaging device that is used in a normal digital camera or the like and has an excellent oblique incident sensitivity characteristic. For example, the sensitivity when the incident angle R ₁ is 15 ° is higher than 80 percent (%). The dotted line in the figure shows the sensitivity for each incident sensitivity of the solid-state imaging device 240 arranged in the imaging unit 200. As illustrated in the figure, the oblique incident sensitivity characteristic of the solid-state image sensor 240 is worse than that of a normal solid-state image sensor. For example, the sensitivity when the incident angle R ₁ is 15 ° is 80 percent (%) or less.

6, in the first embodiment of the present technology, the object point directly above the certain opening, a diagram illustrating an example of the incident angle R ₂ of the light to the opening of its neighbor. When the cell pitch d is 10 micrometers (μm) and the distance L ′ from the opening 221 to the object is 37.3 micrometers (μm), the incident angle R ₂ is obtained by the following equation. Here, L ′ is a real number equal to or greater than L.
R ₂ = arctan (10 / 37.3) ≈15
In the above equation, arctan () represents the inverse function of the tangent function.

Since the angle of incidence R ₂ is about 15 °, from the graph of a dotted line illustrated in FIG. 5, oblique incident sensitivity of the solid-state imaging device 240 is 80 percent (%). If it is assumed that the pixels cannot be identified below this sensitivity, the resolution of the solid-state imaging device 240 is about 10 micrometers (μm) when an object is placed flat at a distance of 37.3 micrometers. .

  FIG. 7 is a graph illustrating an example of the optical transfer function according to the first embodiment of the present technology. In the figure, the vertical axis represents the optical transfer function, and the horizontal axis represents the position on the image plane. 7 indicates the optical transfer function of the solid-state imaging device according to the solid line in FIG. 5, and the dotted line in FIG. 7 indicates the optical transfer function of the solid-state imaging device 240 according to the dotted line in FIG. The position corresponding to the peak of the optical transfer function corresponds to the center position of the unit cell 242 (pixel).

  As illustrated in FIG. 5, assuming that the amount of incident light from other than directly above decreases with respect to the amount of incident light from directly above, as illustrated in FIG. 7, directly above each pixel. The light from the light is optically transmitted to the pixel, while the light from the diagonal is not transmitted.

  For this reason, as illustrated in FIG. 7, the optical transfer function of the solid-state imaging device 240 having a relatively low oblique incidence sensitivity is increased, and the object can be easily identified.

FIG. 8 is a diagram illustrating an example of an incident angle of light incident on the photodetector 241 according to the first embodiment of the present technology. As illustrated in the figure, light from an angle _RA formed by a straight line connecting the photodetector 241 forming a pair and the opening 221 enters the opening 221. The incident angle _RA is, for example, 15 ° or less, and light having an angle larger than that is not incident on the photodetector 241.

  Based on the principle described with reference to FIGS. 5 to 7, first, as illustrated in FIG. 3, the cover glass 210, the light shielding film 220, the transparent body 230, and the solid-state imaging device 240 are sequentially arranged from the object side. On the solid-state imaging device 240, a photodetector 241 is provided for each opening 221 on the light shielding film 220.

  Further, as illustrated in FIG. 8, incident light from a direction in which the angle formed by the straight line connecting the photodetector 241 forming the pair and the opening 221 is larger than a predetermined angle (such as 15 °) is not incident on the photodetector 241. Shall.

  In addition, as illustrated in FIG. 4, a plurality of unit cells 242 are arranged on the image plane, light is incident only on the photodetector 241 in each unit cell 242, and light is incident on portions other than the photodetector 241. Shall not be.

  Further, it is assumed that the size of one side of the photodetector 241 forming the pair substantially matches the size of one side of the opening 221.

In addition, the imaging unit 200 satisfies all the following expressions.
0.7 ≦ d ≦ 16.0 Formula 1
0.4 ≦ p ≦ 15.0 Formula 2
p <d Formula 3
3 ≦ t ≦ 2900 Expression 4
25 ≦ L ≦ 2900 Expression 5
The units of d, p, t, and L in Formulas 1 to 5 are, for example, micrometers (μm).

  Regarding Equation 1, a resolution of about 2000 dpi (dots per inch) is required to recognize sweat glands in the fingerprint and the fingerprint. In order to realize this resolution, a cell pitch d of 12.7 micrometers (μm) or less is required, but considering that the resolution can be improved by subsequent image processing, the cell pitch d is 16 micrometers (μm). ) Therefore, “16” is the upper limit of the cell pitch d. In addition, “0.7” is the lower limit of the cell pitch d due to the general design limit of the solid-state imaging device 240.

Regarding Expression 2, if the difference between the cell size p of the effective photodetector 241 and the cell pitch d of the unit cell 242 is small, sufficient resolution cannot be obtained. However, the lack of resolution can be overcome by using a plurality of light shielding films 220 having openings 221 as described later. The size of the light-shielding film is required to be 1 micrometer (μm) per unit cell with a large pitch from the viewpoint of manufacturing. With these light-shielding films, resolution shortage is solved, t is 3 micrometers (μm), L is 25 micrometers (μm), and cell size p is 15 micrometers (μm). R _A is obtained.
R _A = arctan (7.5 / 28) ≈15
Since the incident angle _RA can be about 15 °, “15.0” is the upper limit of the cell size p.

  If the cell pitch d is smaller than 0.4 micrometers (μm), light having a wavelength of 0.4 micrometers (μm) or less is strongly affected by diffraction and does not reach the photodetector 241. For this reason, “0.4” is the lower limit of the cell pitch d.

  In addition, since the effective photodetector 241 is disposed in the unit cell 242, it is necessary to satisfy Expression 3.

  Regarding Equation 4, the longer the distance t, the lower the oblique incidence sensitivity and the higher the value of the optical transfer function. However, in order to increase the distance t, it is necessary to increase the thickness of the light shielding film 220. As the thickness increases, the manufacture becomes difficult. Here, for example, the cell pitch d is 16 micrometers (μm), the cell size p of the effective photodetector 241 is 8 micrometers (μm), and the thickness L of the cover glass 210 is 52.4 micrometers (μm). To do. In this case, the distance t is 3 micrometers (μm), and the amount of incident light to the adjacent pixel is reduced by 10 percent with respect to a certain pixel. As the current design parameters, these numerical values are the limits for establishing a product, and “3” at this time is the lower limit of the distance t.

  In many cases, the thickness of the imaging unit 200 is required to be 3 millimeters (mm) or less, and at that time, the share of t is at most 2.9 millimeters (mm), that is, 2900 micrometers (μm). ) Until. For this reason, “2900” is the upper limit of t.

  The distance t is adjusted by the thicknesses of the light shielding film 220 and the transparent body 230. Note that the transparent body 230 may not be disposed as long as the condition of Expression 4 can be satisfied. Further, although only one transparent body 230 is provided, two or more laminated transparent bodies 230 may be provided as long as the condition of Expression 4 can be satisfied.

  Regarding Equation 5, if the cover glass 210 is too thin, it becomes difficult for the robot arm to handle the cover glass 210. Since the minimum value that can be handled is about 25 micrometers (μm), “25” is the lower limit of L. In many cases, the thickness of the imaging unit 200 is required to be 3 millimeters (mm) or less, and the thickness of the cover glass 210 is 2.9 millimeters (mm) in consideration of other thicknesses. Up to 2900 micrometers (μm). For this reason, “2900” is the upper limit of L.

Under the conditions of Expression 1 to Expression 5, the size of the effective area formed by the effective photodetector 241 of the imaging unit 200 is, for example, 5 millimeters (mm) × 5 millimeters (mm). For example, 500 × 500 unit cells 242 are arranged in this effective area. An example of setting parameters in this configuration is shown below.
Cell pitch d: 19 micrometers (μm)
Cell size p: 2 micrometers (μm)
Thickness L: 190 micrometers (μm)
Distance t: 8 micrometers (μm)

  The size of the opening 221 is the same value as the cell size p. In the above example, since the cell pitch d is 10 micrometers (μm), in principle, a resolution of 2540 dpi can be realized. Further, since the thickness L of the cover glass is 190 micrometers (μm), the incident angle from one point immediately above a certain photodetector 241 to the adjacent photodetector 241 is 3 °. At this time, the light from one point immediately above the adjacent pixel is kicked by 20%, so that the light from directly above is transferred in each photo detector 241. Thereby, the image quality of image data can be improved and fingerprint authentication accuracy can be increased. In addition, when the solid-state imaging device 240 is formed of silicon having a thickness of 200 micrometers (μm) on an organic substrate having a thickness of 300 micrometers (μm), the total thickness of the authentication device 110 is about 700 micrometers (μm). It can be:

  If the kicking rate of light from an oblique direction is increased, it is possible to identify those in the space above the surface of the cover glass 210. Thereby, the lensless authentication device 110 that performs non-contact authentication can be realized. Moreover, since it is lensless, the authentication device 110 that is inexpensive and highly productive can be provided.

  As described above, according to the first embodiment of the present technology, the photodetectors 241 are provided at positions corresponding to the respective openings 221 on the light shielding film 220. Therefore, in each photodetector 241 from a direction other than right above. The incidence of light can be suppressed. As a result, only light from directly above is incident on the photodetector 241, so that the image quality of the image data can be improved.

<2. Second Embodiment>
In the first embodiment described above, only one light shielding film 220 is arranged in the authentication device 110. However, diffraction occurs due to a plurality of openings 221 provided in the light shielding film 220, and from other than directly above the photodetector 241. May be incident as stray light. In order to suppress this stray light, for example, the light-shielding film may be two or more layers. The authentication device 110 according to the second embodiment is different from the first embodiment in that two or more light shielding films are provided.

  FIG. 9 is an example of a perspective view of the imaging unit 200 according to the second embodiment of the present technology. The imaging unit 200 according to the second embodiment is different from the first embodiment in that an upper light shielding film 222 and a lower light shielding film 223 are disposed between the cover glass 210 and the transparent body 230. A lower light shielding film 223 is laminated on the transparent body 230, and an upper light shielding film 222 is laminated thereon. Although the light shielding film has two layers, three or more light shielding films may be laminated.

  As described above, in the second embodiment of the present technology, since the two light-shielding films are stacked, it is possible to suppress the stray light generated by the diffraction from being incident on the photodetector 241. Thereby, the image quality of image data can be further improved.

<3. Third Embodiment>
In the first embodiment described above, the imaging unit 200 is provided in the authentication device 110. However, the imaging unit 200 may be provided in a lensless microscope and used for sample observation. The imaging unit 200 of the third embodiment is different from the first embodiment in that it is arranged in a lensless microscope.

  FIG. 10 is a block diagram illustrating a configuration example of the lensless microscope 101 according to the third embodiment of the present technology. The lensless microscope 101 is a device that magnifies a minute object, and includes an imaging unit 200, a signal processing unit 115, a control unit 116, and a display unit 120.

  The control unit 116 controls the imaging unit 200 in accordance with a user operation so as to capture image data. The configuration of the imaging unit 200 of the third embodiment is the same as that of the first embodiment.

  The signal processing unit 115 executes processing for enlarging a part of the image data. When enlarging, the signal processing unit 115 executes a process of interpolating pixels and an antialiasing process as necessary. The signal processing unit 115 supplies the enlarged image data to the display unit 120 for display.

  FIG. 11 is an example of a perspective view of the imaging unit 200 according to the third embodiment of the present technology. The user places the sample 303 to be observed on the slide glass 301 and covers it with the cover plate 302. In this manner, the sample 303 placed on the slide glass 301, covered with the cover plate 302, and processed so as to be easily observed is called a preparation.

  Then, the user places the preparation on the cover glass 210 and performs an operation for causing the imaging unit 200 to capture an image. In accordance with the operation, the imaging unit 200 captures image data with high image quality, and enlarges the portion of the sample 303 in the image data. The display unit 120 displays the enlarged image. Thereby, the user can observe the sample 303 in an enlarged manner. Based on the observation result, a user or an image analysis device (not shown) can perform cell selection, virus discrimination, and the like.

The size of the effective area of the imaging unit 200 is, for example, 10 millimeters (mm) × 10 millimeters (mm). For example, 3300 × 3300 unit cells 242 are arranged in this effective area. An example of setting parameters in this configuration is shown below.
Cell pitch d: 3 micrometers (μm)
Cell size p: 1 micrometer (μm)
Thickness L: 58 micrometers (μm)
Distance t: 8 micrometers (μm)

  The size of the opening 221 is the same value as the cell size p. In the above example, since the cell pitch d is 3 micrometers (μm), in principle, a resolution of 8382 dpi can be realized. In addition, since the thickness L of the cover glass 210 is 58 micrometers (μm), the incident angle from one point directly above a certain photodetector 241 to the adjacent photodetector 241 is 3 °. At this time, the light from one point immediately above the adjacent pixel is kicked by 42%, so that the light from just above is transferred in each of the photodetectors 241. Thereby, the image quality of image data can be improved and fingerprint authentication accuracy can be increased.

  As described above, in the third embodiment of the present technology, the lensless microscope 101 enlarges the image by providing the photodetector 241 at the position corresponding to each of the openings 221 on the light shielding film 220. A sample imaged with image quality can be enlarged and observed.

  The above-described embodiment shows an example for embodying the present technology, and the matters in the embodiment and the invention-specific matters in the claims have a corresponding relationship. Similarly, the invention specific matter in the claims and the matter in the embodiment of the present technology having the same name as this have a corresponding relationship. However, the present technology is not limited to the embodiment, and can be embodied by making various modifications to the embodiment without departing from the gist thereof.

  Further, the processing procedure described in the above embodiment may be regarded as a method having a series of these procedures, and a program for causing a computer to execute these series of procedures or a recording medium storing the program. You may catch it. As this recording medium, for example, a CD (Compact Disc), an MD (MiniDisc), a DVD (Digital Versatile Disc), a memory card, a Blu-ray disc (Blu-ray (registered trademark) Disc), or the like can be used.

  In addition, the effect described in this specification is an illustration to the last, Comprising: It does not limit and there may exist another effect.

In addition, this technique can also take the following structures.
(1) Imaging in which a transparent protective layer, a light-shielding film provided with a plurality of openings, and an image sensor provided with a photoelectric conversion unit at a position corresponding to each of the plurality of openings are arranged in order from the object side. And
An authentication device comprising: a signal processing unit that performs predetermined authentication processing based on an image captured by the imaging unit.
(2) The authentication device according to (1), wherein a transparent body is further disposed between the light-shielding film and the imaging element in the imaging unit.
(3) A plurality of unit cells are arranged in the imaging device,
The photoelectric conversion unit is disposed in each of the plurality of unit cells,
Light from each of the plurality of openings is incident on the corresponding photoelectric conversion unit,
The authentication device according to (1) or (2), wherein light from the opening is not incident on a portion that does not correspond to the photoelectric conversion unit in each of the plurality of unit cells.
(4) The authentication device according to (3), wherein a size of the photoelectric conversion unit and a size of the opening substantially coincide with each other.
(5) The unit cell pitch is d, the effective size of the photodetector is p, the distance from the object-side surface of the light shielding film to the photoelectric conversion unit is t, and the thickness of the protective layer is L 0.7 μm ≦ d ≦ 16.0 μm 0.4 μm ≦ p ≦ 15.0 μm p <d
The authentication device according to (3) or (4), wherein all the expressions of 3 micrometers ≦ t ≦ 2900 micrometers and 25 micrometers ≦ L ≦ 2900 micrometers are satisfied.
(6) The authentication device according to any one of (1) to (5), wherein at least two layers of the light shielding film are disposed.
(7) The authentication device according to any one of (1) to (6), wherein the signal processing unit compares the captured image with biometric information registered in advance in the predetermined authentication process.
(8) Imaging in which a transparent protective layer, a light-shielding film provided with a plurality of openings, and an image sensor provided with a photoelectric conversion unit at a position corresponding to each of the plurality of openings are arranged in order from the object side. And
An electronic apparatus comprising: a signal processing unit that performs predetermined signal processing on an image captured by the imaging unit.
(9) Imaging in which a transparent protective layer, a light-shielding film provided with a plurality of openings, and an image sensor provided with a photoelectric conversion unit at a position corresponding to each of the plurality of openings are arranged in order from the object side. And
A signal processing unit that performs a predetermined authentication process based on an image captured by the imaging unit;
An electronic apparatus comprising: a display unit that displays a predetermined screen based on the result of the authentication process.

DESCRIPTION OF SYMBOLS 100 Electronic apparatus 101 Lensless microscope 110 Authentication device 111,115 Signal processing part 112,116 Control part 113 Registration information recording part 120 Display part 200 Imaging part 210 Cover glass 220 Light shielding film 221 Opening 222 Upper light shielding film 223 Lower light shielding film 230 Transparent body 240 Solid-state imaging device 241 Photo detector 242 Unit cell 301 Slide glass 302 Cover plate

Claims (9)

In order from the object side, an imaging unit in which a transparent protective layer, a light shielding film provided with a plurality of openings, and an imaging device provided with a photoelectric conversion unit at a position corresponding to each of the plurality of openings,
An authentication device comprising: a signal processing unit that performs predetermined authentication processing based on an image captured by the imaging unit.   The authentication device according to claim 1, wherein a transparent body is further disposed between the light-shielding film and the imaging element in the imaging unit. In the imaging element, a plurality of unit cells are arranged,
The photoelectric conversion unit is disposed in each of the plurality of unit cells,
Light from each of the plurality of openings is incident on the corresponding photoelectric conversion unit,
The authentication device according to claim 1, wherein light from the opening is not incident on a portion not corresponding to the photoelectric conversion unit in each of the plurality of unit cells. The authentication device according to claim 3, wherein a size of the photoelectric conversion unit and a size of the opening substantially coincide with each other. The unit cell pitch is d, the effective size of the photodetector is p, the distance from the object-side surface of the light shielding film to the photoelectric conversion unit is t, and the thickness of the protective layer is L. 7 micrometers ≦ d ≦ 16.0 micrometers 0.4 micrometers ≦ p ≦ 15.0 micrometers p <d
The authentication device according to claim 3, wherein all of the expressions: 3 micrometers ≤ t ≤ 2900 micrometers 25 micrometers ≤ L ≤ 2900 micrometers are satisfied. The authentication device according to claim 1, wherein at least two layers of the light shielding film are disposed. The authentication device according to claim 1, wherein the signal processing unit compares the captured image with biometric information registered in advance in the predetermined authentication process. In order from the object side, an imaging unit in which a transparent protective layer, a light shielding film provided with a plurality of openings, and an imaging device provided with a photoelectric conversion unit at a position corresponding to each of the plurality of openings,
An electronic apparatus comprising: a signal processing unit that performs predetermined signal processing on an image captured by the imaging unit. In order from the object side, an imaging unit in which a transparent protective layer, a light shielding film provided with a plurality of openings, and an imaging device provided with a photoelectric conversion unit at a position corresponding to each of the plurality of openings,
A signal processing unit that performs a predetermined authentication process based on an image captured by the imaging unit;
An electronic apparatus comprising: a display unit that displays a predetermined screen based on the result of the authentication process.

Images