TW202002258A - Image capture apparatus - Google Patents

Abstract

An image capture apparatus including an image capture element and a spatial filter is provided. The image capture element has a plurality of pixel regions. The spatial filter is disposed on the image capture element, wherein the spatial filter includes a plurality of light transmitting substrates and a plurality of light shielding structures. The plurality of light shielding structures and the light transmitting substrates are alternately arranged along a first direction, wherein each of the light shielding structures at least includes a light absorbing layer, and the light absorbing layer has a plurality of first openings respectively corresponding to the pixel regions. At least one of the plurality of the light shielding structures includes a reflective layer and a light absorbing layer stacked to each other. The reflective layer has a plurality of second openings respectively overlapped with a plurality of first openings of the light absorbing layer of the at least one of the light shielding structures. Each of the second openings of the reflective layer has a width W2 in a second direction. Each of the first openings of the light absorbing layer has a width W1 in the second direction.

Description

Imaging device

The present invention relates to an optical device, and particularly relates to an imaging device.

Today's optical fingerprint recognition devices use the principle of total reflection to achieve fingerprint imaging. The working principle is that when the finger presses the fingerprint recognition device, the convex part of the fingerprint will destroy the total reflection of the light beam in the light-transmitting element, while the concave part of the fingerprint will not The total reflection of the light beam in the light-transmitting element is destroyed, so that the image capturing element can obtain the bright lines of the concave part of the fingerprint and the dark lines of the convex part of the fingerprint. In this way, each pixel area on the image capturing element can capture a stripe pattern corresponding to each area of the fingerprint, thereby recognizing the identity of the user.

In order to improve the accuracy of the image capturing device, the filtering capability of the spatial filter on the image capturing element needs to be further improved. However, in the current conventional technology, the filtering capability of the spatial filter has many shortcomings. For example, the light beam reflected by the fingerprint cannot easily enter the corresponding pixel area accurately, so that the imaging capability of the imaging device cannot be improved. This leads to problems such as a decline in fingerprint recognition.

The invention provides an imaging device with good imaging quality.

The image capturing device of the present invention includes an image capturing element and a spatial filter. The image capture device has multiple pixel areas. The spatial filter is disposed on the image capturing element, wherein the spatial filter includes multiple light-transmitting substrates and multiple light-shielding structures. A plurality of light-shielding structures and light-transmitting substrates are alternately arranged along the first direction, wherein each light-shielding structure includes at least a light-absorbing layer, and has a plurality of first openings corresponding to the pixel regions, respectively. At least one light-shielding structure of the plurality of light-shielding structures includes a reflective layer and a light-absorbing layer stacked in phase. The reflective layer has a plurality of second openings, respectively overlapping the plurality of first openings of the light-absorbing layer of at least one light-shielding structure. Each second opening of the reflective layer has a width W2 in the second direction, and each first opening of the light-absorbing layer has a width W1 in the second direction.

The invention provides a detection device including an image capturing element, a spatial filter and a surface plasmon resonance layer. The image capture device has multiple pixel areas. The spatial filter is disposed on the image capturing element, wherein the spatial filter includes multiple light-transmitting substrates and multiple light-shielding structures. A plurality of light-shielding structures and light-transmitting substrates are alternately arranged along the first direction, wherein each light-shielding structure includes at least a light-absorbing layer, and has a plurality of first openings corresponding to the pixel regions, respectively. At least one light-shielding structure of the plurality of light-shielding structures includes a reflective layer and a light-absorbing layer stacked in phase. The reflective layer has a plurality of second openings, respectively overlapping the plurality of first openings of the light-absorbing layer of at least one light-shielding structure. Each second opening of the reflective layer has a width W2 in the second direction, and each first opening of the light-absorbing layer has a width W1 in the second direction. The spatial filter is located between the surface plasmon resonance layer and the image capturing element, and the surface plasmon resonance layer is used to receive biological polymers.

W1。In an embodiment of the invention, the width W1 of each first opening and the width W2 of each second opening satisfy: W2

W1.

W2

0.8W1。In an embodiment of the present invention, the width W1 of each first opening and the width W2 of each second opening satisfy: 0.2W1

W2

0.8W1.

In an embodiment of the present invention, the sum of the thickness of the light-absorbing layer and the thickness of the reflective layer is smaller than the thickness of the light-transmitting substrate.

In an embodiment of the invention, each of the above-mentioned light-shielding structures has a reflective layer and a light-absorbing layer stacked on top of each other.

In an embodiment of the present invention, the above-mentioned plurality of light-shielding structures include a first light-shielding structure and a second light-shielding structure. The first light-shielding structure includes a reflective layer and a light-absorbing layer stacked on top of each other, and the second light-shielding structure includes a light-absorbing layer but not Reflective layer.

In an embodiment of the invention, the above-mentioned first shading structure is closer to the image capturing element than the second shading structure.

In an embodiment of the invention, the above-mentioned first light-shielding structure is farther from the image capturing element than the second light-shielding structure.

In an embodiment of the present invention, the image capturing device further includes a cover plate having a pressing surface for finger pressing, wherein the spatial filter is located between the cover plate and the image capturing element.

In an embodiment of the invention, the image capturing device further includes a display panel, wherein the spatial filter is located between the display panel and the image capturing element.

In an embodiment of the invention, the above-mentioned image capturing device further includes a filter layer, which is located on the image capturing element.

Based on the above, in an image capturing device according to an embodiment of the present invention, since the light-shielding structure has the reflective layer and the light absorption layer stacked on each other, and the plurality of first openings of the reflection layer and the plurality of second openings of the light absorption layer overlap each other, forming Because of the multiple openings of the shading structure, when the light beam is reflected by the finger and travels toward the multiple openings, it can more accurately limit the transmission of the light beam to the corresponding pixel area on the image capture element, and achieve good imaging quality. And because of the provision of the light absorption layer, part of the light beam can be absorbed by the light absorption layer immediately after being reflected by the reflection layer when passing through the opening, greatly reducing the possibility that the light beam may be transmitted to the adjacent opening, thus reducing the beam crosstalk in each pixel interval ( cross talk), the accuracy of the imaging device is improved. In the detection device of another embodiment of the present invention, since the surface plasmon resonance layer is also provided, the detection device can detect biological characteristics of biopolymers in addition to being used for fingerprint identification of fingers, and has dual The effectiveness of the device increases the practicality of the device.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

FIG. 1 is a schematic cross-sectional view of an imaging device according to an embodiment of the invention. Referring to FIG. 1, the image capturing device 100 includes an image capturing element 110 and a spatial filter 120. The image capture device 110 has a plurality of pixel areas 112. In this embodiment, the image capturing element 110 may be a photoelectric sensor, such as: a photosensitive coupling device (Charge-Coupled Device; CCD) or a complementary metal oxide semiconductor (Complementary Metal-Oxide-Semiconductor; CMOS) sensor. Device, but the invention is not limited to this.

The spatial filter 120 is disposed on the image capturing element 110. The spatial filter 120 includes a plurality of light-transmitting substrates 122 and a plurality of light-shielding structures 124. The plurality of light-shielding structures 124 and the plurality of light-transmitting substrates 122 are alternately arranged along the first direction D1. For example, in this embodiment, the transparent substrate 122 may be a transparent substrate, such as a glass substrate, a plastic substrate, or a combination thereof. However, the invention is not limited to this. In other embodiments, the transparent substrate 122 may also be a deposited transparent film.

2 is a schematic top view of a light-shielding structure of an imaging device according to an embodiment of the invention. 1 and 2, each light-shielding structure 124 at least includes a light-absorbing layer 124a, and has a plurality of first openings O1 corresponding to the plurality of pixel regions 112, respectively. At least one light-shielding structure 124 of the plurality of light-shielding structures 124 includes a reflective layer 124r and a light-absorbing layer 124a stacked on top of each other. For example, in this embodiment, a plurality of light-shielding structures 124-1, 124-2, 124-3 are sequentially provided along a direction away from the image capturing element 110 (eg, the first direction D1) Each of the light-shielding structures 124-1, 124-2, and 124-3 may have a reflective layer 124r and a light-absorbing layer 124a, but the present invention is not limited thereto. In this embodiment, the material of the reflective layer 124r may be a metal material or other materials with high reflectivity or a combination thereof, and the material of the light absorbing layer 124a may be a light absorbing material with low reflectivity, such as dark ink or other suitable Material.

W2

0.8W1，但本發明不以此為限。The reflection layer 124r of the at least one light-shielding structure 124 has a plurality of second openings O2 corresponding to the plurality of pixel regions 112, respectively, and the light-absorbing layer 124a of the at least one light-shielding structure 124 has a plurality of first openings respectively overlapping the plurality of second openings O2 Opening O1. The second opening O2 of the reflective layer 124r has a width W2 in the second direction D2, and the first opening O1 of the light absorbing layer 124a has a width W1 in the second direction D2, and W2<W1. For example, 0.2W1

W2

0.8W1, but the invention is not limited to this.

In this embodiment, the plurality of first openings O1 and the plurality of second openings O2 of the plurality of light-shielding structures 124 form a plurality of light channels, and the extending directions of the plurality of light channels may be parallel to the pressing surface 132 of the cover 130 Normal direction (for example: the first direction D1). However, the present invention is not limited to this. In other embodiments, the multiple light channels of the multiple light-shielding structures 124 may also extend in an oblique direction, as described in Republic of China Patent Application No. 107202731. In addition, in the present embodiment, the plurality of second openings O2 of the plurality of light-shielding structures 124 have a uniform width W2. However, the present invention is not limited to this. In other embodiments, the width W2 of the plurality of second openings O2 of the plurality of reflective layers 124r of the plurality of light-shielding structures 124 corresponding to the same pixel area 112 can also be captured as the distance goes away The component 110 may be decreased or increased by reference to the patent application No. 106142487 of the Republic of China.

A reflective material layer (not shown) is patterned to form a reflective layer 124r having a plurality of second openings 02. A light-absorbing material layer (not shown) may be patterned to form a light-absorbing layer 124a having a plurality of second openings O2. It is worth mentioning that, generally speaking, due to the characteristics of the reflective material, it is easy to form a second opening O2 with a small width and/or a high distribution density in the reflective material layer; due to the characteristics of the light absorbing material, compared to the reflective material layer, It is not easy to form the first opening O1 with a small width and/or a high distribution density in the light-absorbing material layer. In this embodiment, since at least one light-shielding structure 124 of the spatial filter 120 includes the reflective layer 124r, and the reflective layer 124r has the second opening O2 having a small width W2 and/or a high distribution density, the light of the spatial filter 120 The minimum width of the channel (for example: W2) is small, and/or the distribution density of the optical channel is high, and it has better spatial filtering capability, which can further improve the imaging resolution of the imaging device 100.

FIG. 3 is an enlarged schematic view of the spatial filter 120 in the imaging device 100 of FIG. 1. 1 and 3, the light beams L1, L2, and L3 diffused by one of the biological features (for example, the fingerprint of the finger F) are transmitted to the spatial filter 120 at various incident angles. The light beam L1 can pass through the optical channel of the spatial filter 120 and be transmitted to the corresponding pixel area 112 of the image capturing element 120 to form a clear biometric image. The light beam L2 can be directly transmitted to the light absorbing layer 124 of the spatial filter 120 and absorbed by the light absorbing layer 124. The light beam L2 is not likely to be mistakenly entered into the non-corresponding pixel area 112, causing a cross-talk problem. Although the light beam L3 is reflected by the reflection layer 124r of one light-shielding structure 124-2 toward the reflection layer 124r of another light-shielding structure 124-3, the light beam L3 is reflected by the reflection layer 124r of the light-shielding structure 124-3 and then is reflected by the light-shielding structure 124-2 The light absorption layer 124a absorbs the light beam L3, and it is not easy for the light beam L3 to enter the non-corresponding pixel area 112, causing crosstalk problems. Therefore, with at least one light-shielding structure 124 having the reflective layer 124r and the light absorbing layer 124a, the spatial filter 120 can not only improve the resolution of the imaging device 100, but also not easily cause crosstalk problems.

In this embodiment, the sum of the thickness H1 of the light absorbing layer 124a and the thickness H2 of the reflective layer 124r is smaller than the thickness H3 of the light-transmitting substrate 122. For example, referring to FIG. 3, the sum of the thickness H1 of the light absorption layer 124a of the light shielding structure 124-1 and the thickness H2 of the reflection layer 124r of the light shielding structure 124-1 is smaller than the light absorption layer 124a covering the light shielding structure 124-1 And the thickness H3 of the light-transmitting substrate 122 on the reflective layer 124r. The relationship between the thickness of the light-shielding structures 124-2 and 124-3 and the light-transmitting substrate 122 is the same, and will not be repeated here.

Please refer to FIG. 1. In this embodiment, the imaging device 100 may optionally include a cover 130 having a pressing surface 132 for pressing by the finger F, wherein the spatial filter 120 is located between the cover 130 and the image capturing element 110 between.

Please refer to FIG. 1. In this embodiment, the imaging device 100 may optionally include a surface plasmon resonance layer SPR, wherein the spatial filter 120 is located between the surface plasmon resonance layer SPR and the image capture element 110. For example, in this embodiment, the surface plasmon resonance layer SPR may be disposed on the pressing surface 132 of the cover plate 130, but the invention is not limited thereto. The surface plasmon resonance layer SPR is used to receive Biopolymers BP. The biopolymer BP may be sweat, saliva, blood, urine, bacteria, viruses, or other biopolymers to be detected. In this embodiment, the imaging device 100 provided with the surface plasmon resonance layer SPR can also be referred to as a detection device. The detection device can simultaneously sense the fingerprint characteristics on the finger F and the biological characteristics of the biological polymer BP. Features.

When the light beam L is transmitted to the surface plasmon resonance layer SPR, the light beam L will undergo total internal reflection (TIR) on the surface SPRa of the surface plasmon resonance layer SPR, and will disappear in a sparse medium (such as an environmental medium) Wave (Evanescent Wave), forming a surface plasma wave (Surface Plasma Wave) in an optically dense medium (for example, the surface plasmon resonance layer SPR). At this time, the resonance between the evanescent wave and the surface plasmon wave will occur. When the evanescent wave resonates with the surface plasmon wave, most of the energy of the beam L incident on the surface plasmon resonance layer SPR is absorbed by the surface plasmon wave, and thus the beam L of the surface plasmon resonance layer SPR is in a specific direction The intensity of will be greatly reduced, and the specific angle at this time is called the resonance angle γ (Resonant Angle). In this embodiment, the resonance angle γ is related to the change in the refractive index of the surface SPRa of the surface plasmon resonance layer SPR, that is, the property of the biopolymer BP attached to the surface SPRa of the surface plasmon resonance layer SPR (for example : Dielectric constant). By analyzing the distribution of the reflected light beam L formed on the image capturing element 110, it can be inferred that the above-mentioned resonance angle γ, and then infer the type of biological polymer BP attached to the surface SPRa of the surface plasmon resonance layer SPR, and whether it is To test the type of biological polymer BP. In addition, in this embodiment, the surface SPRa of the surface plasmon resonance layer SPR can be selectively a surface modification layer, so that the biopolymer BP can be more easily attached to the surface plasmon resonance layer SPR, thereby improving detection Sensitivity. Through the setting of the surface plasmon resonance layer SPR, in addition to the biometric function, the imaging device 100 also has the function of detecting the biopolymer BP, which has multiple functions.

4 is a schematic cross-sectional view of an imaging device according to another embodiment of the invention. The imaging device 100A of FIG. 4 is similar to the imaging device 100 of FIG. 1, and similar elements are not described here again. The difference between the two is that each first opening O1 of the spatial filter 120A in FIG. 4 The width W1 is the same as the width W2 of each second opening O2. In this embodiment, for example, the light absorbing layer 124a may be an opaque material, such as graphite or other light absorbing materials. In this embodiment, the light absorbing layer 124a can be formed on the surface of the reflective layer 124r using a coating process. The light absorbing layer 124a is disposed on the reflective layer 124r in a thin film form. However, the invention is not limited to this.

5 is a schematic cross-sectional view of an image capturing device according to still another embodiment of the present invention. The imaging device 100B of FIG. 5 is similar to the imaging device 100 of FIG. 1, and the spatial filter 120B is similar to the spatial filter 120 of FIG. 1, and similar elements are not described here. In this embodiment, the imaging device 100B may optionally include a display panel 140, wherein the spatial filter 120 is located between the display panel 140 and the image capturing element 110. In this embodiment, the display panel 140 can be selectively used as a light source for illuminating the finger F, but the invention is not limited thereto. For example, the display panel 140 may be an Organic Light-Emitting Diode (OLED) display device or other types of display devices. In a feasible embodiment, the light source of the display panel 140 may be used as a The light source of the imaging device 100B. In this embodiment, the image capturing device 130 may optionally include a filter layer 150 on the image capturing element 110. In this embodiment, the filter layer 150 is located between the cover 130 and the image capturing element 110, but the invention is not limited thereto. The filter layer 150 is used to filter out ambient light outside the wavelength range of the non-light beam L. For example, if the light beam L is an infrared light beam, the filter layer may be an infrared pass filter layer (IR pass filter). If the light beam L is a visible light beam, the filter layer may be an infrared cut filter layer (IR cut filter). However, the invention is not limited to this. According to other embodiments, the filter layer may also be other types of filter layers.

6 is a schematic cross-sectional view of an imaging device according to yet another embodiment of the invention. The imaging device 100C of FIG. 4 is similar to the imaging device 100 of FIG. 1, and similar elements are not described here again. The difference between the two is that the light absorbing layer 124 a of the same light-shielding structure 124 of the spatial filter 120 of FIG. 1 It is disposed on the reflective layer 124r of the same shading structure 124, but the light absorption layer 124a of the same shading structure 124 of the spatial filter 120C of FIG. 4 is disposed under the reflective layer 124r of the same shading structure 124. The image capturing apparatus 100A has similar functions and advantages as the image capturing apparatus 100 of FIG. 1 and will not be repeated here.

7 is a schematic cross-sectional view of an imaging device according to an embodiment of the invention. The image capturing device 100D of FIG. 5 is similar to the image capturing device 100 of FIG. 1, and similar elements are not repeated here. The difference between the two is that the spatial filter 120D of FIG. 5 includes the light-shielding structures 124-1, 124- 2. 124-3, wherein the light shielding structures 124-1 and 124-2 are closer to the image capturing element 110 than the light shielding structure 124-3, and the light shielding structures 124-1 and 124-2 may not have a reflective layer. The imaging device 100B has similar functions and advantages as the imaging device 100 of FIG. 1 and will not be repeated here.

8 is a schematic cross-sectional view of an imaging device according to another embodiment of the invention. The image capturing device 100E of FIG. 6 is similar to the image capturing device 100 of FIG. 1, and similar elements are not repeated here. The difference between the two is that the spatial filter 120E of FIG. 6 includes the light-shielding structures 124-1, 124- 2. 124-3, wherein the light shielding structure 124-2 is disposed between the plurality of light shielding structures 124-1 and 124-3, and the light shielding structure 124-2 may not have a reflective layer. The imaging device 100C has similar functions and advantages as the imaging device 100 of FIG. 1 and will not be repeated here.

9 is a schematic cross-sectional view of an imaging device according to yet another embodiment of the present invention. The image capturing device 100F of FIG. 7 is similar to the image capturing device 100 of FIG. 1, and similar elements are not repeated here. The difference between the two is that the spatial filter 120F of FIG. 7 includes the light-shielding structures 124-1, 124- 2. 124-3, wherein the light shielding structures 124-2 and 124-3 are farther away from the image capturing element 110 than the light shielding structure 124-1, and the light shielding structures 124-2 and 124-3 may not have a light absorption layer. The imaging device 100D has similar functions and advantages as the imaging device 100 of FIG. 1 and will not be repeated here.

In summary, the image capturing device of the present invention includes an image capturing element and a spatial filter disposed on the image capturing element. The spatial filter includes light-transmitting substrates and light-shielding structures that are alternately arranged, and the light-shielding structure includes a light-absorbing layer and a reflective layer that are stacked, and the reflective layer has a plurality of second openings and the light-absorbing layer has a plurality of first openings, a plurality of first The width of the two openings is smaller than the width of the plurality of first openings. Since the width of the second opening of the reflective layer can be smaller than the width of the first opening of the light absorbing layer, the light beam reflected by the finger can enter the pixel area on the image capturing element more collimatedly, and the quality of the image acquisition is good Effect. In addition, even if a non-collimated light beam enters the opening and contacts the surface of the reflective layer, the surrounding light absorbing layer can immediately absorb the light beam, thus avoiding the crosstalk phenomenon caused by the light beam running to the adjacent opening, so that the accuracy of imaging is improved .

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be deemed as defined by the appended patent application scope.

100, 100A, 100B, 100C, 100D, 100E, 100F‧‧‧‧Image capture device 110‧‧‧Image capture device 112‧‧‧Pixel area 120, 120A, 120B, 120C, 120D, 120E, 120F‧‧‧Space Filter 122‧‧‧Translucent base materials 124, 124-1, 124-2, 124-3‧‧‧Light-shielding structure 124a‧‧‧Light-absorbing layer 124r‧‧‧Reflective layer 130‧‧‧Cover plate 132‧‧‧ Pressing surface 140‧‧‧ Display panel 150‧‧‧ Filter layer D1‧‧‧ First direction D1‧‧‧ Second direction F‧‧‧Finger H1, H2, H3‧‧‧ Thickness L, L1, L2, L3 ‧‧‧Beam O1‧‧‧First opening O2‧‧‧Second opening SPR‧‧‧Surface plasma resonance layer SPRa‧‧‧surface W1, W2‧‧‧Width γ‧‧‧Resonance angle

FIG. 1 is a schematic cross-sectional view of an imaging device according to an embodiment of the invention. 2 is a schematic top view of a light-shielding structure of an imaging device according to an embodiment of the invention. FIG. 3 is an enlarged schematic view of the spatial filter 120 in the imaging device 100 of FIG. 1. 4 is a schematic cross-sectional view of an imaging device according to another embodiment of the invention. 5 is a schematic cross-sectional view of an imaging device according to yet another embodiment of the invention. 6 is a schematic cross-sectional view of an imaging device according to yet another embodiment of the invention. 7 is a schematic cross-sectional view of an imaging device according to an embodiment of the invention. 8 is a schematic cross-sectional view of an imaging device according to another embodiment of the invention. 9 is a schematic cross-sectional view of an imaging device according to yet another embodiment of the present invention.

100‧‧‧Acquisition device

110‧‧‧Image capture component

112‧‧‧Pixel area

120‧‧‧Spatial filter

122‧‧‧Transparent substrate

124, 124-1, 124-2, 124-3 ‧‧‧ shading structure

124a‧‧‧Light-absorbing layer

124r‧‧‧Reflective layer

130‧‧‧Cover

132‧‧‧Pressing surface

BP‧‧‧Biopolymer

D1‧‧‧First direction

D2‧‧‧Second direction

F‧‧‧finger

L‧‧‧beam

O1‧‧‧First opening

O2‧‧‧Second opening

SPR‧‧‧Plasma Resonance Layer

SPRa‧‧‧Surface

W1, W2‧‧‧Width

γ‧‧‧Resonance angle

Claims (22)

An image capturing device includes: an image capturing element having a plurality of pixel areas; and a spatial filter disposed on the image capturing element, wherein the spatial filter includes: a plurality of transparent substrates; and a plurality of A light-shielding structure alternately arranged with the light-transmitting substrates along a first direction, wherein each of the light-shielding structures at least includes a light-absorbing layer with a plurality of first openings respectively corresponding to the pixel areas; At least one light-shielding structure includes a reflective layer and a light-absorbing layer stacked on each other, the reflective layer has a plurality of second openings, respectively overlapping a plurality of first openings of the light-absorbing layer of the at least one light-shielding structure, each of the reflective layer One second opening has a width W2 in a second direction, and each first opening of the light absorbing layer has a width W1 in the second direction. The imaging device as described in item 1 of the patent application scope, wherein the width W1 of each first opening and the width W2 of each second opening satisfy: W2

W1. The imaging device as described in item 1 of the patent application range, wherein the width W1 of each first opening and the width W2 of each second opening satisfy: 0.2W1

W2

0.8W1. The imaging device as described in item 1 of the patent application range, wherein the sum of the thickness of the light absorption layer and the thickness of the reflection layer is smaller than the thickness of the light-transmitting substrate. The imaging device as described in item 1 of the patent application scope, wherein each of the light-shielding structures has the reflective layer and the light absorption layer stacked one on another. An imaging device as described in item 1 of the patent application range, wherein the light-shielding structures include a first light-shielding structure and a second light-shielding structure, the first light-shielding structure includes the reflective layer and the light-absorbing layer stacked one on top of the other The second light-shielding structure includes a light-absorbing layer but not the reflective layer. The imaging device as described in item 6 of the patent application range, wherein the first light-shielding structure is closer to the image capturing element than the second light-shielding structure. The imaging device as described in item 6 of the patent application range, wherein the first light-shielding structure is farther from the image capturing element than the second light-shielding structure. The imaging device as described in item 1 of the patent application scope further includes: a cover plate having a pressing surface for pressing by a finger, wherein the spatial filter is located between the cover plate and the image capturing element. The imaging device as described in item 1 of the patent application scope further includes: a display panel, wherein the spatial filter is located between the display panel and the image capturing element. The imaging device as described in item 1 of the patent application scope further includes: a filter layer located on the image capturing element. A detection device includes: an image capturing element having a plurality of pixel areas; a spatial filter disposed on the image capturing element, wherein the spatial filter includes: a plurality of light-transmitting substrates; and a plurality of light-shielding Structure, and the light-transmitting substrates are alternately arranged in a first direction, wherein each of the light-shielding structures at least includes a light-absorbing layer, and has a plurality of first openings corresponding to the pixel areas; at least one of the light-shielding structures The light-shielding structure includes a reflective layer and a light-absorbing layer stacked on each other, the reflective layer has a plurality of second openings, respectively overlapping a plurality of first openings of the light-absorbing layer of the at least one light-shielding structure, and each of the reflective layers The second opening has a width W2 in a second direction, each first opening of the light absorbing layer has a width W1 in the second direction; and a surface plasmon resonance layer, wherein the spatial filter is located at the Between the surface plasmon resonance layer and the image capturing element, the surface plasmon resonance layer is used to receive a biopolymer. The detection device according to item 12 of the patent application scope, wherein the width W1 of each first opening and the width W2 of each second opening satisfy: W2

W1. The detection device according to item 12 of the patent application scope, wherein the width W1 of the first opening and the width W2 of each second opening satisfy: 0.2W1

W2

0.8W1. The detection device according to item 12 of the patent application range, wherein the sum of the thickness of the light-absorbing layer and the thickness of the reflective layer is smaller than the thickness of the light-transmitting substrate. The detection device according to item 12 of the patent application scope, wherein each of the light-shielding structures has the reflection layer and the light absorption layer stacked one on another. The detection device according to item 12 of the patent application scope, wherein the light-shielding structures include a first light-shielding structure and a second light-shielding structure, the first light-shielding structure includes the reflective layer and the light-absorbing layer stacked on top of each other, the first The two light-shielding structures include a light-absorbing layer but not the reflective layer. The detection device as described in Item 17 of the patent application range, wherein the first shading structure is closer to the image capturing element than the second shading structure. The detection device according to item 17 of the patent application scope, wherein the first light-shielding structure is farther from the image capturing element than the second light-shielding structure. The detection device as described in item 9 of the patent application scope further includes: a cover plate having a pressing surface for pressing by a finger, wherein the spatial filter is located between the cover plate and the image capturing element. The detection device as described in item 20 of the patent application scope further includes: a display panel, wherein the spatial filter is located between the display panel and the image capturing element. The detection device as described in item 20 of the patent application scope further includes: a filter layer located on the image capture element.

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