TWM572986U - Bio-sensing apparatus - Google Patents

Abstract

A bio-sensing apparatus adapted to sense biopolymers is provided. The bio-sensing apparatus includes a sensing device, a translucent device and a surface plasmon resonance layer. The translucent device is disposed on the sensing device. The surface plasmon resonance layer is disposed on the translucent device and is adapted to receive the biopolymers. The translucent device is disposed between the surface plasmon resonance layer and the sensing device.

Description

Testing device

The present invention relates to a detection device, and more particularly to a detection device for sensing biopolymers.

In the past, the identification technology used, for example, to press a biometric feature (for example, a finger) to transfer ink onto a sheet of paper to form a fingerprint pattern, and then use an optical scan input computer to create a file or compare. The above identification has the disadvantage that it cannot be processed immediately, and it cannot meet the demand for instant identity authentication in today's society. Therefore, the electronic biometric identification device has become one of the mainstream of current technological development. However, in general, the biometric device only has the function of biometric identification. Therefore, how to increase the other functions of the biometric device to enhance the added value of the biometric device is also one of the current development directions.

The novel creation provides a detection device that senses biopolymers.

The detecting device of an embodiment of the present invention includes a sensing element, a spatial filtering element, a light transmitting element, and a surface plasma resonance layer. The sensing element has a sensing surface and includes a plurality of spatial filters. Each spatial filter includes a light transmissive layer and a spatial filter layer disposed on the light transmissive layer. The spatial filter layer has a plurality of light transmitting portions and a plurality of light blocking portions, and each of the light transmitting portions is surrounded by the plurality of light blocking portions. A plurality of light transmissive layers of the plurality of spatial filters and a plurality of spatial filter layers of the plurality of spatial filters are alternately stacked in a normal direction of the sensing surface. The light transmissive element is disposed on the spatial filter element. The spatial filter component is disposed between the light transmissive element and the sensing element. The surface plasma resonant layer is disposed on the light transmissive element and is configured to receive the biopolymer. The light transmissive element is disposed between the surface plasma resonant layer and the spatial filter element.

The detecting device of an embodiment of the present invention includes a light guiding element, a first reflecting element, a sensing element, a light emitting element, and a surface plasma resonance layer. The light guiding element includes a top surface and a bottom surface opposite to the top surface. The first reflective element is disposed on a bottom surface of the light guiding element. The sensing element is disposed beside the bottom surface of the light guiding element. The illuminating element is configured to emit a sensing beam. The light beam is reflected by the first reflective element and transmitted to the sensing element. The surface plasma resonant layer is disposed on the light guiding element and is configured to receive the biopolymer. The light guiding element is located between the surface plasma resonant layer and the sensing element.

The novel creation proposes another detection device comprising a light guiding element, a sensing element, a surface plasma resonance layer and a spatial filtering element. The light guiding element has a top surface and a bottom surface opposite to the top surface. The sensing element is disposed beside the bottom surface of the light guiding element. The surface plasma resonant layer is disposed on the top surface of the light guiding element and is configured to receive the biopolymer. The spatial filtering component is disposed between the bottom surface of the light guiding component and the sensing component, wherein the spatial filtering component has a plurality of first optical channels and a plurality of second optical channels, and the plurality of first optical channels extend in the first oblique direction a plurality of second optical channels extending in a second oblique direction, the first oblique direction being staggered with the second oblique direction, the normal direction of the top surface of the light guiding element having an angle β with the second oblique direction, and The angle β corresponds to the resonance angle γ of the surface plasma resonance layer.

In an embodiment of the present invention, the plurality of first optical channels and the plurality of second optical channels are alternately arranged.

In an embodiment of the present invention, the normal direction of the top surface of the light guiding element has an angle α with the first oblique direction.

In an embodiment of the novel creation, the angles α and β described above satisfy: α < β.

In an embodiment of the present invention, the detecting device further includes a first reflective component disposed on a bottom surface of the light guiding component, wherein the light beam is reflected by the surface plasma resonant layer and the first reflective component and transmitted to the sensing component. .

In an embodiment of the present invention, the first reflective element includes a plurality of first reflective portions spaced apart from each other on a bottom surface of the light guiding element.

In an embodiment of the present invention, the detecting device further includes a second reflective component disposed on a top surface of the light guiding component and spaced apart from the surface plasma resonant layer, wherein the light beam is surface-plasma resonant layer, The first reflective element and the second reflective element are reflected and transmitted to the sensing element.

In an embodiment of the present invention, the light beam is reflected by the surface plasma resonance layer and transmitted to the first reflective element.

In an embodiment of the present invention, the spatial filtering component further includes a plurality of third optical channels and a plurality of fourth optical channels, and the plurality of third optical channels extend in a third oblique direction, and the plurality of fourth The optical channel extends in a fourth oblique direction, and the third oblique direction is staggered with the fourth oblique direction, and a normal direction of the top surface of the light guiding element has an angle β2 with the third oblique direction, and a top surface of the light guiding element The normal direction has an angle β3 with the fourth oblique direction, and the angle β2 and the angle β3 satisfy: α<β2, β3<β.

In an embodiment of the present invention, the first optical channel, the second optical channel, the third optical channel, and the fourth optical channel are sequentially arranged on the sensing element.

In an embodiment of the present invention, the angle β2 and the angle β3 described above satisfy: α<β2<β3<β.

In an embodiment of the present invention, the plurality of light transmitting portions of the plurality of spatial filtering layers alternately stacked in the normal direction of the sensing surface form a plurality of light channels respectively corresponding to the plurality of sensing units, and the plurality of light At least two of the light channels of the channel are not parallel to each other.

Based on the above, the detecting device of the present invention includes a light guiding element, a sensing element, a surface plasma resonance layer, and a spatial filtering element. The spatial filtering component is provided with a plurality of first optical channels and a second optical channel, wherein the first optical channel extends along the first oblique direction, the second optical channel extends along the second oblique direction, and the first oblique direction Interlaced with the second oblique direction, the second oblique direction has an angle β with the normal direction of the top surface of the light guiding element, and the angle β corresponds to the resonance angle γ of the surface plasma resonance layer. The plurality of first optical channels are configured to pass the sensing beam reflected by the biometric feature, thereby causing the sensing element to acquire an image of the biometric feature. The plurality of second optical channels are used to pass the sensing beam reflected by the surface plasma resonance layer, thereby determining whether there is a biopolymer of the type to be detected on the surface plasma resonance layer. The detecting device of the present invention has the dual functions of biometric identification and sensing biopolymer, and has high added value.

The above described features and advantages of the present invention will become more apparent and understood from the following description.

The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the embodiments. The directional terms mentioned in the following embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only directions referring to the additional schema. Therefore, the directional terminology used is for illustrative purposes and is not intended to limit the novel creation. Also, in any of the following embodiments, the same or similar elements will be given the same or similar reference numerals.

1 is a schematic view and a partially enlarged schematic view of a detecting device according to an embodiment of the present invention. 2 is a top plan view of a detecting device according to an embodiment of the present invention. 3 is an enlarged schematic view of a portion R of the detecting device of FIG. 1. Referring to FIG. 1 to FIG. 3 , the detecting device 100 is adapted to sense the fingerprint 60 of the finger of the test subject 50 , and the detecting device 100 includes the sensing component 110 , the light transmitting component 130 , and the light transmitting component 130 and the sensing component. Spatial filtering element 120 between 110. The sensing element 110 has a sensing surface 111 and the spatial filtering component 120 is disposed on the sensing surface 111. In other words, in the detecting device 100 of the present embodiment, a sensing beam is adapted to be transmitted from the light transmitting element 130 to the sensing element 110, and the sensing beam needs to pass through the spatial filtering component 120 to be transmitted to the sensing component. 110.

The spatial filter component 120 of the present embodiment includes a plurality of light shielding portions 124 and a plurality of light transmitting portions 122, and each of the light transmitting portions 122 is surrounded by a portion of the light shielding portions 124, that is, there are many surrounding portions of each of the light transmitting portions 122. The light shielding portions 124 are adjacent to each other. The light transmissive element 130 of the present embodiment is disposed on the spatial filter component 120, and the light transmissive component 130 is adapted to contact the finger of the test subject 50, so that the fingerprint 60 of the test subject 50 can be pressed against the light transmissive component 130.

The light transmissive element 130 of the present embodiment is adapted to transmit the sensing beams L1, L2, and L3 from the finger of the subject 50 to the spatial filtering element 120, and the light blocking portions 124 of the spatial filtering element 120 are adapted to shield a portion of the sensing beam ( Here, the sensing beam L2 is taken as an example), and another part of the sensing beam (herein, the sensing beams L1 and L3 are exemplified) is adapted to be transmitted to the sensing surface 111 via the light transmitting portions 122.

In the detecting device 100 of the present embodiment, since each of the light transmitting portions 122 of the spatial filtering element 120 is surrounded by the light blocking portion 124, the light shielding portion 124 surrounding the light transmitting portion 122 can control the light transmitting portion 122 surrounded by the light transmitting portion 122. The lower portion senses the sensing beam received by the surface 111 and prevents the scattered light beam from other portions of the fingerprint 60 from being transmitted to the portion of the sensing surface 111 below the light transmitting portion 122. In other words, if the sensing beam enters the spatial filtering component 120 of the embodiment at an excessive angle of incidence, the light shielding portion 124 of the spatial filtering component 120 blocks the sensing beam having an excessive incident angle, thereby allowing the sensing component 110 to It is more accurate to receive images from different positions of the fingerprint 60 and to improve the sensing accuracy of the detecting device 100. Further, the fingerprint 60 of the test subject 50 has a plurality of peaks 62. The detecting device 100 of the present embodiment can allow the sensing surface 111 under each of the light transmitting portions 122 to receive the peaks 62 from the two lower fingerprints 60. The sensing beams L1, L3, in turn, allow the sensing component 110 to sense a fingerprint image or fingerprint information that can be easily discerned.

Specifically, referring to the partially enlarged schematic diagram in FIG. 1 , the sensing component 110 of the present embodiment includes a plurality of sensing units 112 , and the sensing units 112 are arranged on the sensing surface 111 , and each of the transparent portions 122 corresponds to One of these sensing units 112. In other words, the light transmitting portion 122 of the embodiment covers the sensing unit 112, so that the sensing unit 112 can receive the sensing beam through the light transmitting portion 122. On the other hand, the light shielding portion 124 can prevent the sensing unit 112 from receiving the sensing beam from the fingerprint 60 of the farther region, thereby ensuring that the sensing unit 112 can receive the sensing beam from the fingerprint of the adjacent region directly above it, Further, the detecting device 100 can accurately sense the image signal of the fingerprint 60 of the subject 50.

Referring to FIG. 1, in detail, the detecting device 100 of the present embodiment further includes a light emitting element 140, and the light emitting element 140 is adapted to emit a sensing beam to the surface of the finger of the subject 50 (ie, the fingerprint 60). The illuminating element 140 of the present embodiment is, for example, adapted to emit a sensing beam having a wavelength in the visible light band or the invisible light band to the fingerprint 60 of the subject 50, and the sensing element 110 is adapted to receive the same or similar wavelength as the wavelength of the sensing beam. Beam.

Further, the light shielding portion 124 of the spatial filtering component 120 of the present embodiment is adapted to absorb the sensing beam, that is, the light shielding portion 124 is adapted to absorb a light beam having the same or similar wavelength as the wavelength of the sensing beam, thereby allowing the detecting device 100 to provide Accurate fingerprint sensing. Furthermore, the spatial filtering component 120 referred to in this application may be comprised of collimating components, microstructures, optical fibers, gratings, etc., and is not limited herein.

Specifically, the sensing element 110 in the above embodiment is, for example, an image sensor such as a Charged-Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS). The photosensitive unit 112 is, for example, a sensing pixel of the above-described image sensor, but the novel creation is not limited thereto. In other embodiments, the photosensitive cells 112 can be closely arranged on the sensing surface 111 covered by the spatial filtering component 120. That is, the spatial filtering component 120 of the presently-created embodiment can be matched with various image sensors. And provide good fingerprint sensing results.

In order to clearly explain the position and relative relationship of the components of the present embodiment, the light transmitting elements of the detecting device are omitted. Referring to FIG. 2 , in an embodiment of the present invention, the light shielding portions 124 of the spatial filtering component 120 and the transparent portions 122 are alternately arranged on the sensing surface 111 along the first direction n1 and the second direction n2 . The first direction n1 is perpendicular to the second direction n2, and the first direction n1 and the second direction n2 are both perpendicular to the normal direction N of the sensing surface 111. In other words, each of the light transmitting portions 122 of the present embodiment is located between the two light blocking portions 124 in the first direction n1, and each of the light transmitting portions 122 is located at the two light blocking portions 124 in the second direction n2. Therefore, the light shielding portions 124 and the light transmitting portions 122 are arranged in a checkerboard arrangement. Since each of the light transmitting portions 122 of the spatial filtering component 120 of the present embodiment is surrounded by the four light blocking portions 124, the sensing light beam can be more accurately transmitted from the fingerprint 60 to the sensing surface 111, thereby providing a good fingerprint feeling. Measure the effect.

Referring to FIG. 2, the light-emitting element 140 of the present embodiment is disposed, for example, on both sides of the spatial filter element 120, the light-transmitting element 130, and the light-receiving element 110. However, the novel creation is not limited thereto. In other embodiments, the light-emitting element 140 may be disposed at a corner, a periphery, or a combination of the spatial filter element 120, the light-transmitting element 130, and the photosensitive element 110.

On the other hand, the refractive index of the material of the light transmissive element 130 of the present embodiment is the same as the refractive index of the material of the light transmissive portion 122 of the spatial filter element 120. Therefore, the transparent portions 122 can be in the spatial filter element 120 and sensed. Good optical transmission between elements 110 is provided.

Referring to FIG. 2, the width W1 of the light transmitting portions 122 in the first direction n1 of the present embodiment is less than or equal to the width of the sensing unit 112 in the first direction n1, and the light transmitting portions 122 are in the second direction n2. The width W2 is less than or equal to the width of the sensing unit 112 in the second direction n2. Referring to FIG. 1 together, therefore, the spatial filtering component 120 of the detecting apparatus 100 of the present embodiment can well match the width of the fingerprint 60 of the subject 50. Further, the pitch between the adjacent two light shielding portions 124 of the present embodiment is substantially the same as the distance R _es that the sensing unit 112 of the sensing element 110 is to analyze (that is, adjacent to the fingerprint to be sensed). The width between the two peaks), and the detecting device 100 of the present embodiment is identical, wherein h1 is the height of the light transmitting element 130 in the normal direction N parallel to the sensing surface 111, and h2 is the spatial filtering element 120 is parallel to The height of the sensing surface 111 in the normal direction N, W is the minimum width of each of the light transmitting portions 122 in the normal direction N perpendicular to the sensing surface 111. Therefore, the light shielding portion 124 of the spatial filter component 120 of the present embodiment can provide a good light shielding effect, avoiding the formation of noise by the scattered light of a large angle, thereby improving the sensing accuracy of the detecting device 100.

On the other hand, the spatial filtering component 120 of the present embodiment conforms to: , wherein h1 and h2 are each a height of the light transmissive element 130 and the spatial filter element 120 in a direction parallel to the normal direction N of the sensing surface 111. Therefore, the size of the light transmitting portion 122 in the spatial filtering component 120 of the detecting device 100 of the present embodiment can be well matched with the width of the fingerprint 60 to be detected, thereby providing a good fingerprint detecting effect.

Referring to FIG. 1 , in the embodiment, the light transmitting component 130 further includes a connecting surface 131 and a surface 133 . The surface 133 is adapted to contact the finger of the test subject 50. The connection surface 131 is connected to the spatial filter component 120. The spatial filter component 120 is coupled to the sensing surface 111 of the sensing component 110, and the surface 133, the connection surface 131 and the sensing surface 111 are mutually connected. parallel. Therefore, the light shielding portion 124 and the light transmitting portion 122 of the spatial filter element 120 are alternately arranged between the sensing surface 111 and the connecting surface 131 along the normal direction N perpendicular to the sensing surface 111, so that the sensing surface 111 can be made The sensed beam sensed above corresponds exactly to the fingerprint 60 on the surface 133.

Referring to FIG. 1 and FIG. 3, the spatial filter component 120 of the present embodiment includes a plurality of spatial filters 120a. Each spatial filter 120a includes a light transmissive layer 126 and a spatial filter layer 128 disposed on the light transmissive layer 126. The spatial filter layer 128 has a plurality of transparent portions 128a and a plurality of light blocking portions 128b, and each of the transparent portions 128a is The plurality of light blocking portions 128b are surrounded. The spatial filter layer 128 can be regarded as a light-shielding layer having a specific pattern, the light-shielding portion 128b is a light-shielding material portion of the light-shielding layer, and the light-transmitting portion 128a is a light-transmitting opening of the light-shielding layer. The plurality of light transmissive layers 126 of the plurality of spatial filters 120a and the plurality of spatial filter layers 128 of the plurality of spatial filters 120a are alternately stacked in the normal direction N of the sensing faces 111. The plurality of light blocking portions 128b of the plurality of spatial filter layers 128 of the plurality of spatial filters 120a define the light blocking portions 124 of the spatial filter elements 120. The plurality of light transmitting portions 128a of the plurality of spatial filter layers 128 of the plurality of spatial filters 120a define the light transmitting portions 128a of the spatial filter elements 120.

Referring to FIG. 1 and FIG. 3, it is noted that the detecting apparatus 100 of the embodiment further includes a surface plasmon resonance layer SPR. The surface plasma resonance layer SPR is disposed on the surface 133 of the light transmissive element 130. The light transmissive element 130 is disposed between the surface plasma resonance layer SPR and the spatial filter element 120. In the present embodiment, the material of the surface plasma resonance layer SPR includes, for example, a metal, and the thickness of the surface plasma resonance layer SPR is, for example, about 50 nanometers (nm), but the present invention is not limited thereto.

The surface plasma resonance layer SPR is used to receive biopolymers 80, such as sweat, blood, urine, bacteria, viruses, etc., but the novel creation is not limited thereto. The at least one light emitting element 140 is configured to emit the sensing light beam L4 to the surface plasma resonant layer SPR. The sensing beam L4 reflected by the surface plasma resonance layer SPR has various reflection angles θr; when the biopolymer 80 is formed on the surface plasma resonance layer SPR, it has a specific angle (ie, resonance angle) among various reflection angles θr The reflectance of the sensing beam L4 may drop; the sensing element 110 receives the sensing beam L4 having various reflection angles θr reflected by the surface plasma resonance layer SPR; and the light of the sensing beam L4 received by the sensing element 110 is analyzed. The distribution can infer why the particular angle (ie, the resonance angle) is. From the specific angle, it can be recognized whether the biopolymer 80 disposed on the surface plasma resonance layer SPR is a specific biopolymer 80. The following is exemplified in conjunction with FIG. 4.

4 shows the relationship between various reflection angles θr of the sensing light beam L4 reflected by the surface plasma resonance layer SPR and its reflectance. Referring to FIG. 3 and FIG. 4, for example, when the first biopolymer 80 is formed on the surface plasma resonance layer SPR, the sensing beam L4 having various reflection angles θr is reflected by the surface plasma resonance layer SPR. The reflectance at a specific angle θr1 is diminished, and the sensing beam L4 having various reflection angles θr reflected by the surface plasma resonance layer SPR received by the sensing element 110 can be used to infer the specific angle θr1 by a specific angle. Θr1, it can be recognized that the biopolymer 80 disposed on the surface plasma resonance layer SPR is the first biopolymer 80; when the second biopolymer 80 is formed on the surface plasma resonance layer SPR, The reflectance of the sensing beam L4 having various reflection angles θr reflected by the surface plasma resonance layer SPR at a certain angle θr2 is abruptly decreased, and the analysis of the sensing element 110 is reflected by the surface plasma resonance layer SPR having various reflection angles. The sensing beam L4 of θr can infer why the specific angle θr2, by the specific angle θr2, can identify the biopolymer 80 disposed on the surface plasma resonance layer SPR as the second biopolymer 80; Biopolymer 80 is formed on the surface On the slurry resonance layer SPR, the reflectance of the sensing beam L4 having various reflection angles θr reflected by the surface plasma resonance layer SPR at a specific angle θr3 is abruptly decreased, and the surface resist resonance received by the sensing element 110 is analyzed. The sensing beam L4 having various reflection angles θr reflected by the layer SPR can infer why the specific angle θr3, and by the specific angle θr3, the biopolymer 80 disposed on the surface plasma resonance layer SPR can be identified as the third type. Biopolymer 80.

Fig. 5 is a cross-sectional view showing the detecting device of the embodiment of the present invention. Figure 6 is a top plan view of the spatial filtering component of Figure 1. Referring to FIG. 5 and FIG. 6, the detecting apparatus 100A of the present invention has the function of extracting the biological features of the person to be tested 50. For example, the biometric feature can be a fingerprint or a vein, but is not limited thereto.

The detecting device 100A includes a light transmitting element 130, a light emitting element 140, a sensing element 110, and a spatial filtering element 120A. The sensing element 110 is disposed beside the light emitting element 140. The light emitting element 140 and the sensing element 110 are located on the same side of the light transmitting element 130. Spatial filtering components.

The 120A is disposed between the light transmitting component 130 and the sensing component 110, and the spatial filtering component 120A can be fixed to the light transmitting component 130 and the sensing component 110 by an adhesive layer (not shown) or a fixing mechanism (not shown). between.

The light transmissive element 130 is adapted to protect an element located thereunder, which may be a glass substrate or a plastic substrate. The glass substrate may be a chemically strengthened or physically strengthened glass substrate or an unreinforced glass substrate. The plastic substrate may be polycarbonate (PC), polyethylene terephthalate (PET), polymethylmethacrylate (PMMA) or polyimide (PI), etc. , but not limited to this.

The light transmissive element 130 has an inner surface SI and a surface 133 opposite the inner surface SI. The inner surface SI of the light transmissive element 130 is the surface of the light transmissive element 130 facing the sensing element 110, and the surface 133 of the light transmissive element 130 is the contact surface of the subject 50. That is, the subject 50 touches the surface 133 of the light transmitting member 130 for biometric recognition.

The illuminating element 140 is adapted to provide a beam B that illuminates the subject 50. Light emitting element 140 can include a plurality of light emitting elements 142. Each of the light-emitting elements 142 emits a light beam B toward the person to be tested 50. The plurality of light emitting elements 142 may include a light emitting diode, a laser diode, or a combination of the two. Further, the light beam B may include visible light, non-visible light, or a combination of the two. The non-visible light may be infrared light, but is not limited thereto.

Sensing element 110 is adapted to receive a portion of beam B that is reflected by subject 50 (ie, beam B1 with fingerprint pattern information). In an embodiment, a pulse width modulation circuit can be integrated into the sensing component 110. The illuminating time of the plurality of illuminating elements 142 and the taking time of the sensing element 110 are controlled by the pulse width modulation circuit, so that the illuminating time of the plurality of illuminating elements 142 is synchronized with the taking time of the sensing element 110, and the precision can be achieved. The effect of the control, but not limited to this.

The spatial filtering component 120A is adapted to collimate the portion of the beam B that is reflected by the subject 50 and that is transmitted toward the sensing element 110. Spatial filter element 120A includes a plurality of spatial filters 120a that overlap each other. In this embodiment, the spatial filtering component 120A includes two spatial filters such as the first spatial filter 120a-1 and the second spatial filter 120a-2, and the first spatial filter 120a-1 is configured in the second spatial filtering. The sheet 120a-2 is between the sensing element 110. However, the number of spatial filters in the spatial filter component 120A and the mutual configuration relationship between the plurality of spatial filters may vary as desired, and are not limited to those shown in FIG.

Each of the plurality of spatial filters 120a includes a light transmissive layer 126 and a spatial filter layer 128 disposed on the light transmissive layer 126. For example, the first spatial filter 120a-1 includes a light transmissive layer 126 and a spatial filter layer 128, wherein the spatial filter layer 128 is disposed on the surface S1421S of the light transmissive layer 126 facing the sensing element 110 and located at the transparent layer 126 and Between the sensing elements 110. The second spatial filter 120a-2 includes a light transmissive layer 126, a first spatial filter layer 128-1, and a second spatial filter layer 128-2, wherein the first spatial filter layer 128-1 is disposed on the light transmissive layer 126 facing the sensing The surface S1441S of the element 110 is located between the light transmissive layer 126 of the first spatial filter 120a-1 and the light transmissive layer 126 of the second spatial filter 120a-2, and the second spatial filter layer 128-2 is disposed in the surface. The light layer 126 faces the surface S1441C of the light transmitting element 130 and is located between the light transmitting element 130 and the light transmitting layer 126 of the second spatial filter 120a-2.

It should be noted that the number of the light transmissive layers 126, the number of the spatial filter layers 128, the relative arrangement relationship between the light transmissive layer 126 and the spatial filter layer 128, and the formation method of the spatial filter layer 128 in each spatial filter 120a can be determined according to requirements. The change is not limited to the one shown in Figure 5. In the present embodiment, a plurality of recesses C are formed on the surface S1441S of the light transmissive layer 126, and the spatial filter layer 128 is disposed in the plurality of recesses C of the light transmissive layer 126 such that the outer surface T1442 and the surface of the spatial filter layer 128 S1441S is not formed with a plurality of recesses C partially flush. The method of forming the spatial filter layer 128 can include the following steps. First, a plurality of recesses C are formed on the surface S1441S of the light transmissive layer 126. Next, a light absorbing material is formed in the plurality of depressions C. The light absorbing material is then cured to form a spatial filter layer 128. In an embodiment, the light transmissive layer 126 and its plurality of depressions C may be formed by die casting, and the step of forming a plurality of depressions C may be omitted.

In each of the spatial filters 120a, the light transmissive layer 126 provides a bearing surface of the spatial filtering layer 128, which may be a glass substrate or a plastic substrate. The spatial filtering layer 128 is used to absorb large angle beams (such as the beam B2 and the beam B3) in the portion of the beam B that is reflected by the subject 50 to achieve the effect of collimating the beam transmitted to the sensing element 110. The spatial filter layer 128 has a high absorption rate and a low reflectance to reduce the proportion of the light beam transmitted to the spatial filter layer 128 being reflected by the spatial filter layer 128 and the number of times the light beam is reflected by the spatial filter layer 128, thereby effectively reducing the sense of the large angle beam. The ratio received by component 110 is measured. The low reflectance means that the reflectance is less than 10% in the visible light band and the infrared light band. For example, the spatial filter layer 128 can be a low reflectivity ink, but is not limited thereto.

Further, in order to enable the portion of the beam B that is reflected by the subject 50 (such as the beam B1) to be received by the sensing element 110, the spatial filtering layer includes a plurality of light transmitting portions 128a. The plurality of light transmitting portions 128a expose the plurality of sensing units 112 of the sensing element 110. Specifically, the plurality of transparent portions 128a of the spatial filter layer 128 are disposed corresponding to the plurality of sensing units 112 of the sensing element 110.

The pitch of the plurality of light transmitting portions 128a is S. Each of the plurality of light transmitting portions 128a has a width W and 0.3 W < S. The thickness of the light transmissive layer 126 of the first spatial filter 120a-1 is T1. The thickness of the light transmissive layer 126 of the second spatial filter 120a-2 is T2. The detecting device 100A satisfies: . Here, the thickness of the light transmissive layer 126 of the spatial filter 120a refers to the total thickness of all the light transmissive layers 126 in the spatial filter 120a. In the present embodiment, the first spatial filter 120a-1 includes only one light transmissive layer 126, and the second spatial filter 120a-2 includes only one light transmissive layer 126. Therefore, the thickness T1 of the transparent layer of the first spatial filter 120a-1 is the thickness of one transparent layer 126, and the thickness T2 of the transparent layer of the second spatial filter 120a-2 is the thickness of one transparent layer 126, but Not limited to this.

By The design enables the large-angle beam (such as the beam B2 and the beam B3) to be absorbed by the spatial filtering layer 128 between the plurality of spatial filters 120a via multiple reflections, thereby effectively improving the crosstalk problem and making the detecting device 100A good. Identification ability. In an embodiment, if the detecting device 100A is satisfied The design can further reduce the proportion of the large-angle beam received by the sensing component 110, so that the signal-to-noise ratio can be effectively improved, and the back-end can identify the signal and the noise, thereby improving the recognition success rate. In still another embodiment, the detecting device 100A is satisfied The signal-to-noise ratio can approach zero.

Referring to FIG. 5, the detecting device 100A of the present embodiment further includes a Surface Plasmon Resonance layer SPR. The function of the surface plasma resonance layer SPR of the detecting device 100A is the same as that of the surface plasma resonance layer SPR of the detecting device 100, and will not be repeated here.

Fig. 7 is a cross-sectional view showing the detecting device of the embodiment of the present invention. 8 and 9 are schematic top views of the detecting device 100B of the embodiment of FIG. 7 in the absence of process tolerances and process tolerances, respectively.

Referring first to FIG. 7 and FIG. 8, the detecting device 100B is adapted to capture the biological characteristics of the object to be tested. For example, the object to be tested may be a finger or a palm, and the biological feature may be a fingerprint, a palm print or a vein, but is not limited thereto.

The detecting device 100B includes a light transmitting element 130, a sensing element 110, and a spatial filtering element 120B.

The spatial filter element 120B is disposed between the light transmissive element 130 and the sensing element 110 and is adapted to collimate a light beam that is reflected by the object under test and that is transmitted toward the sensing element 110. Further, the spatial filtering component 120B includes a first spatial filtering layer 128-1, a second spatial filtering layer 128-2, and a third spatial filtering layer 128-3 that overlap each other.

In order to enable the light beam reflected by the object to be tested to be received by the sensing element 110, the first spatial filtering layer 128-1, the second spatial filtering layer 128-2, and the third spatial filtering layer 128-3 respectively have a plurality of first transparent The light portion 128a1, the plurality of second light transmitting portions 128a2, and the plurality of third light transmitting portions 128a3. Each of the first light transmitting portions 128a1 is overlapped with one of the second light transmitting portions 128a2, one of the third light transmitting portions 128a3, and the corresponding one of the sensing units 112, so that the small angle light beams transmitted to the sensing unit 112 can pass through each other. One of the first light transmitting portions 128a1, one second light transmitting portion 128a2, and one third light transmitting portion 128a3 are transferred to the corresponding one of the sensing units 112.

The spatial filtering element 120B satisfies that the size SO3 of each of the third light transmitting portions 128a3 is greater than or equal to the size SO2 of each of the second light transmitting portions 128a2, and the size SO2 of each of the second light transmitting portions 128a2 is greater than that of each of the first light transmitting portions 128a1. The size SO1 of the third light transmitting portion 128a3 is larger than the size SO2 of each of the second light transmitting portions 128a2, and the size SO2 of each of the second light transmitting portions 128a2 is greater than or equal to the size of each of the first light transmitting portions 128a1. . In the structure in which the shape of the light transmitting portion is circular, the size of the light transmitting portion refers to the diameter of the light transmitting portion. In the structure in which the shape of the light transmitting portion is a square, another polygon, or a combination of the above shapes, the size of the light transmitting portion refers to the width of one side of the light transmitting portion.

In the case where the sizes of the plurality of light transmitting portions of the plurality of spatial filter layers 128 are the same, the larger the size of the plurality of light transmitting portions, the larger the amount of light entering the sensing unit 112, but the crosstalk problem is likely to occur. Conversely, the smaller the size of the plurality of light transmitting portions, although the crosstalk problem can be effectively improved, the amount of light entering is easily caused to be too small. In addition, the centers of the plurality of light transmissive portions of the different spatial filter layers may not be aligned due to process tolerances. That is to say, the spatial filtering layer closer to the sensing unit 112 may shield the light transmitting portion (the hole blocking phenomenon) above it, so that the effective opening values corresponding to the sensing units 112 (the multiple spatial filtering layers are transparent) The intersection of the light portions is smaller than the preset effective opening value (ie, the size of the light transmitting portion), thereby causing the actual light input amount of each sensing unit 112 to be smaller than the preset light input amount of each sensing unit 112.

In view of the above, in the embodiment, when designing the sizes of the plurality of transparent portions of the different spatial filter layers, the crosstalk problem, the amount of light entering, and the hole blocking phenomenon caused by the process tolerances are all taken into consideration. For example, according to the size of each sensing unit 112, the lateral distance D of two adjacent sensing units 112, and the longitudinal distance between adjacent two spatial filtering layers (including the longitudinal distance D' and the longitudinal distance D'') The size of the first light transmitting portion 128a1 of the first spatial filter layer 128-1 is SO1 to simultaneously improve the problem of crosstalk and excessive light input. In addition, the size of the light transmitting portion of at least one of the remaining spatial filtering layers 128 (such as at least one of the second spatial filtering layer 128-2 and the third spatial filtering layer 128-3) is greater than the first spatial filtering. The size of the first light transmitting portion 128a1 of the layer 128-1 is SO1. In this way, even if the centers of the plurality of light transmitting portions of the different spatial filtering layers cannot be aligned due to the process tolerance (see FIG. 9), the light transmitting portion closer to the upper portion of the sensing unit 112 can be effectively prevented from being shielded. The effective opening value corresponding to each sensing unit 112 is equal to or approximates a preset effective opening value (ie, the size SO1 of the first light transmitting portion 128a1), thereby avoiding excessively limiting the sensing element 110 while improving crosstalk. The amount of light entering.

In this embodiment, the size SO3 of each of the third light transmitting portions 128a3 is larger than the size SO2 of each of the second light transmitting portions 128a2, and the size SO2 of each of the second light transmitting portions 128a2 is larger than the size of each of the first light transmitting portions 128a1. . Further, the first spatial filter layer 128-1, the second spatial filter layer 128-2, and the third spatial filter layer 128-3 are arranged from the sensing element 110 toward the light transmissive element 130. However, the relative size relationship of the different light transmitting portions and the arrangement of the different spatial filtering layers may be changed as needed, and are not limited to those shown in FIG.

The spatial filtering component 100B may further include other components depending on different needs. For example, the spatial filter component 100B can further include a first light transmissive layer 126-1 and a second light transmissive layer 126-2 to carry the spatial filter layer described above. The first light transmissive layer 126-1 and the second light transmissive layer 126-2 are adapted to pass light beams. For example, the light transmissive layer may be a glass substrate, a plastic substrate, a transparent photoresist, or the like, but is not limited thereto.

The first light transmissive layer 126-1 is located between the sensing element 110 and the light transmissive element 130, and the second light transmissive layer 126-2 is located between the first light transmissive layer 126-1 and the light transmissive element 130. The second spatial filter layer 128-2 is located between the first light transmissive layer 126-1 and the second light transmissive layer 126-2. The first spatial filter layer 128-1 is located between the sensing element 110 and the first light transmissive layer 126-1. The third spatial filter layer 128-3 is located between the second light transmissive layer 126-2 and the light transmissive element 130. In this embodiment, the first spatial filter layer 128-1 is disposed on the surface S131 of the first light transmissive layer 126-1 facing the sensing element 110, and the second spatial filter layer 128-2 is embedded in the second light transmissive layer 126. -2 facing the surface S133A of the first light transmissive layer 126-1, and the third spatial filter layer 128-3 is disposed on the surface S133B of the second light transmissive layer 126-2 facing the light transmissive element 130, but not limit. In an embodiment, the first spatial filter layer 128-1 may be embedded in the surface S131 of the first light transmissive layer 126-1 facing the sensing element 110. Further, the second spatial filter layer 128-2 may be disposed on the surface S133A of the second light transmissive layer 126-2 facing the first light transmissive layer 126-1. Furthermore, the third spatial filter layer 128-3 can be embedded in the surface S133B of the second light transmissive layer 126-2 facing the light transmissive element 130.

Between the transparent component 130 and the second transparent layer 126-2, between the second transparent layer 126-2 and the first transparent layer 126-1, and between the first transparent layer 126-1 and the sensing component 110 The spaces may be fixed together by an adhesive layer (not shown) or a fixing mechanism (not shown). The adhesive layer may be an Optical Clear Adhesive (OCA) or a Die Attach Film (DAF), but is not limited thereto. When the light transmissive element 130 and the second light transmissive layer 126-2 are fixed together by an adhesive layer, the adhesive layer may be located in the third light transmissive portion between the light transmissive element 130 and the second light transmissive layer 126-2. 128a3 (ie, the light transmissive opening of the third spatial filter layer 128-3), the third spatial filter layer 128-3 and the light transmissive element 130, or a combination of the two. In other words, the light transmitting medium in the third light transmitting portion 128a3 between the light transmitting member 130 and the second light transmitting layer 126-2 may be an air or an adhesive layer. In addition, when the second light transmissive layer 126-2 and the first light transmissive layer 126-1 are fixed together by the adhesive layer, the adhesive layer may be located at the second light transmissive layer 126-2 and the first light transmissive layer 126. -1, between the second spatial filter layer 128-2 and the first light transmissive layer 126-1 or a combination of the two. In addition, when the first light transmissive layer 126-1 and the sensing element 110 are fixed together by an adhesive layer, the adhesive layer may be located between the first light transmissive layer 126-1 and the sensing element 110. The light portion 128a1 (ie, the light transmissive opening of the first spatial filter layer 128-1), the first spatial filter layer 128-1 and the sensing element 110, or a combination of the two. In other words, the light transmitting medium in the first light transmitting portion 128a1 between the first light transmitting layer 126-1 and the sensing element 110 (ie, the light transmitting opening of the first spatial filtering layer 128-1) may be air or Adhesive layer.

Figure 10 is a cross-sectional view showing the detecting device of the embodiment of the present invention. Referring to Fig. 10, the main differences between the detecting device 100C and the detecting device 100B of Fig. 7 are as follows. In the detecting device 100B of FIG. 7, the sizes of the plurality of light transmitting portions of the different spatial filtering layers 128 are gradually increased from the sensing element 110 toward the light transmitting element 130. On the other hand, in the detecting device 100C of FIG. 10, the sizes of the plurality of light transmitting portions of the different spatial filtering layers 128 are decreased from the sensing element 110 toward the light transmitting element 130.

Further, the first spatial filter layer 128-1, the second spatial filter layer 128-2, and the third spatial filter layer 128-3 are arranged from the light transmissive element 130 toward the sensing element 110 such that the third spatial filter layer 128- 3 is located between the sensing element 110 and the first light transmissive layer 126-1, and the first spatial filter layer 128-1 is located between the second light transmissive layer 126-2 and the light transmissive element 130. In this embodiment, the third spatial filter layer 128-3 is disposed on the surface S131 of the first light transmissive layer 126-1 facing the sensing element 110, and the first spatial filter layer 128-1 is disposed on the second light transmissive layer. 126-2 faces the surface S133B of the light transmitting element 130, but is not limited thereto. In an embodiment, the third spatial filter layer 128-3 may be embedded in the surface S131 of the first light transmissive layer 126-1 facing the sensing element 110, and the first spatial filter layer 128-1 may be embedded in the first surface. The two light transmissive layers 126-2 face the surface S133B of the light transmissive element 130.

Referring to FIGS. 7 and 10 , each of the detecting device 100B and the detecting device 100C includes a surface Plasmon Resonance layer SPR. The functions of the surface plasma resonance layer SPR of the detecting device 100B and the detecting device 100C are the same as those of the surface plasma resonance layer SPR of the detecting device 100, and will not be repeated here.

Figure 11 is a cross-sectional view showing the detecting device of an embodiment of the present invention. Referring to FIG. 11, the detecting device 100D is configured to acquire a fingerprint 12 image. The detecting device 100D includes a light transmitting element 130, a sensing element 110 disposed opposite the light transmitting element 130, and a spatial filtering element 120D disposed between the light transmitting element 130 and the sensing element 110.

The detecting device 100D further includes a light emitting element (not shown) for emitting the sensing light beams L1, L2. In the present embodiment, the sensing beams L1, L2 may be transmitted to the surface 133 via the light transmissive element 130. The fingerprint 12 of the subject 50 located on the surface 133 has a trough 12a and a crest 12b. When part of the sensing light beam L1 is incident on the partial surface 133 of the corresponding valley 12a, the total reflection of the partial sensing light beam L1 is not destroyed, and is incident obliquely to the corresponding sensing unit 112. When part of the sensing light beam L2 is incident on the partial surface 133 of the corresponding peak 12b, the total reflection of the partial sensing light beam L2 is destroyed and scattered, and is incident on the corresponding sensing unit 112. The energy of the portion of the sensing beam L1 incident on the sensing unit 112 and corresponding to the valley 12a is strong, and the energy of the sensing beam L2 incident on the corresponding peak 12b of the sensing unit 112 is weak, thereby enabling the sensing element 110 to capture light and dark. Fingerprint 12 image.

The spatial filtering component 120D includes a plurality of spatial filtering layers 128 and a plurality of light transmissive layers 126. A plurality of spatial filtering layers 128 and a plurality of light transmissive layers 126 are alternately stacked. Each spatial filtering layer 128 has a plurality of light transmitting portions 128a corresponding to the plurality of sensing units 112 of the sensing elements 110, respectively. For example, in this embodiment, the spatial filtering component 120D can selectively include a first spatial filtering layer 128-1, a second spatial filtering layer 128-2, a third spatial filtering layer 128-3, and a first a light transmissive layer 126-1 and a second second light transmissive layer 126-2, wherein the first spatial filter layer 128-1, the first light transmissive layer 126-1, the second spatial filter layer 128-2, and the second The light transmissive layer 126-2 and the third spatial filter layer 128-3 are sequentially arranged by the sensing element 110 toward the light transmissive element 130.

It should be noted that the number of spatial filter layers 128 and the number of light transmissive layers 126 as described above and in the drawings are only used to illustrate the novel creation and not to limit the novel creation. According to other embodiments, the number of spatial filtering layers 128 and the number of light transmissive layers 126 included in the spatial filtering component 120D may also be designed to other suitable quantities depending on actual needs.

It should be noted that the plurality of transparent portions 128a of the plurality of first spatial filter layers 128-1, 128-2, and 128-3 corresponding to the same sensing unit 112 are arranged along the oblique direction d, and the oblique direction d and The normal direction N of the surface 133 has an included angle θ, and 0 ^o < θ < 90 ^o . For example, in the present embodiment, it is preferable that 35 ^o < θ < 85 ^o . Specifically, in the embodiment, θ may be equal to 60 ^o , but the novel creation is not limited thereto.

In this embodiment, the plurality of light transmissive portions 128a of one of the plurality of spatial filtering layers 128 of the spatial filtering component 120D closest to the sensing element 110 and the plurality of sensing elements 110 are respectively The sensing unit 112 is aligned, and the plurality of transparent portions 128a of the second spatial filtering layer 128-2 and the third spatial filtering layer 128-3 of the spatial filtering component 120D are not coupled to the plurality of sensing units 112 of the sensing component 110. Aligned and offset toward the same side (eg, to the left), wherein the second spatial filtering layer 128-2 and the plurality of transparent portions 128a of the third spatial filtering layer 128-3 that are further away from the sensing element 110 are corresponding to each other The degree of offset of the plurality of sensing units 112 is greater. In another implementation manner of the novel creation, the plurality of transparent portions 128a of the first spatial filtering layer 128-1 of the plurality of spatial filtering layers 128 of the spatial filtering component 120D that are closest to the sensing component 110 are respectively associated with The plurality of sensing units 112 of the sensing element 110 are non-aligned (eg, the light transmitting portion 128a of the first spatial filtering layer 128-1 is slightly smaller than the sensing unit 112), and the novel creation is not limited.

It is worth mentioning that the plurality of light transmitting portions 128a of the plurality of first spatial filtering layers 128-1, 128-2, and 128-3 arranged along the oblique direction d form a plurality of optical channels, since the optical channel is oblique To the arrangement, the ambient light beam L0 (eg, sunlight) that is substantially perpendicular to the incident surface 133 is not easily transmitted through the optical channel to the sensing element 110. Thereby, the ambient light beam L0 does not easily interfere with the fingerprint 12 information carried by the sensing light beams L1, L2, and contributes to significantly improving the image quality of the fingerprint 12.

In this embodiment, the plurality of light transmitting portions 128a of the plurality of spatial filtering layers 128 are arranged at the same pitch. In detail, the plurality of transparent portions 128a of the first spatial filter layer 128-1 are arranged at a pitch P1, and the plurality of transparent portions 128a of the second spatial filter layer 128-2 are arranged at a pitch P2, and the third spatial filter layer 128 The plurality of light transmitting portions 128a of -3 are arranged at a pitch P3, and the pitch P1, the pitch P2, and the pitch P3 are substantially equal. For example, in the embodiment, the pitch P1, the pitch P2, and the pitch P3 may both be 50 μm, but the novel creation is not limited thereto.

In this embodiment, the diameters of the plurality of light transmitting portions 128a corresponding to the same sensing unit 112 may be substantially the same. In other words, one light transmissive portion 128a of the first spatial filter layer 128-1, one light transmissive portion 128a of the second spatial filter layer 128-2, and one light transmissive portion 128a of the third spatial filter layer 128-3 correspond to each other. The same sensing unit 112, one light transmitting portion 128a of the first spatial filtering layer 128-1 has a diameter K1, and one light transmitting portion 128a of the second spatial filtering layer 128-2 has a diameter K2, and the third spatial filtering layer 128-3 One of the light transmitting portions 128a has a diameter K3, and the diameter K1, the diameter K2, and the diameter K3 are substantially equal, but the present invention is not limited thereto. For example, the diameter K1, the diameter K2, and the diameter K3 may be 15 μm, but the novel creation is not limited thereto. In addition, in the embodiment, the thickness H1 of the first light transmissive layer 126-1 and the thickness H2 of the second light transmissive layer 126-2 may be equal. For example, the thickness H1 of the first light transmissive layer 126-1 and the thickness H2 of the second light transmissive layer 128-2 may both be 50 μm, but the novel creation is not limited thereto.

Figure 12 is a cross-sectional view showing the detecting device of an embodiment of the present invention. Referring to FIG. 11 and FIG. 2, the detecting device 100E is similar to the detecting device 100D described above. If the two are the same or similar, please refer to the above description, and thus will not be repeated here. The main difference between the detecting device 100E and the detecting device 100D is that the detecting device 100E further includes a third light transmitting layer 126-3 and a spatial filtering layer 128-4, wherein the first spatial filtering layer 128-1 and the first light transmitting layer 126- 1. The second spatial filter layer 128-2, the second light transmissive layer 126-2, the third spatial filter layer 128-3, the third light transmissive layer 126-3, and the spatial filter layer 128-4 are directed by the sensing element 110 The light transmitting members 130 are arranged in order.

In this embodiment, the plurality of transparent portions 128a of the first spatial filter layer 128-1 are arranged at a pitch P1, and the plurality of transparent portions 128a of the second spatial filter layer 128-2 are arranged at a pitch P2, and the third spatial filtering The plurality of transparent portions 128a of the layer 128-3 are arranged at a pitch P3, and the plurality of transparent portions 128a of the spatial filter layer 128-4 are arranged at a pitch P4, and the pitch P1, the pitch P2, the pitch P3, and the pitch P4 are substantially equal. . For example, in the embodiment, the pitch P1, the pitch P2, the pitch P3, and the pitch P4 may all be 50 μm, but the novel creation is not limited thereto.

In this embodiment, one light transmitting portion 128a of the first spatial filtering layer 128-1 has a diameter K1, and one light transmitting portion 128a of the second spatial filtering layer 128-2 has a diameter K2, and the third spatial filtering layer 128-3 One of the light transmitting portions 128a has a diameter K3, and one of the light transmitting portions 128a of the spatial filter layer 128-4 has a diameter K4, and the diameter K1, the diameter K2, the diameter K3, and the diameter K4 are substantially equal. For example, in the present embodiment, the diameter K1, the diameter K2, the diameter K3, and the diameter K4 may both be 15 μm, but the novel creation is not limited thereto.

In the present embodiment, the thickness H1 of the first light transmissive layer 126-1 and the thickness H2 of the second light transmissive layer 126-2 and the thickness H3 of the third light transmissive layer 126-3 are not equal. For example, the thickness H1 of the first light transmissive layer 126-1, the thickness H2 of the second light transmissive layer 126-2, and the thickness H3 of the third light transmissive layer 126-3 may be 50 μm, 25 μm, and 25 μm, respectively. Creation is not limited to this. In addition, in the embodiment, θ may be equal to 60 ^o , but the novel creation is not limited thereto.

Figure 13 is a cross-sectional view showing the detecting device of an embodiment of the present invention. Referring to FIG. 12 and FIG. 13 , the detecting device 100F is similar to the detecting device 100E. If the two are the same or similar, please refer to the above description, and thus will not be repeated here. The main difference between the detecting device 100F and the detecting device 100E is that the detecting device 100F further includes a light transmitting layer 126-4 and a spatial filtering layer 128-5, wherein the first spatial filtering layer 128-1, the first transparent layer 126-1, a second spatial filter layer 128-2, a second light transmissive layer 126-2, a third spatial filter layer 128-3, a third light transmissive layer 126-3, a spatial filter layer 128-4, a light transmissive layer 126-4, and The spatial filter layer 128-5 is sequentially arranged by the sensing element 110 toward the light transmissive element 130.

In this embodiment, the plurality of transparent portions 128a of the first spatial filter layer 128-1 are arranged at a pitch P1, and the plurality of transparent portions 128a of the second spatial filter layer 128-2 are arranged at a pitch P2, and the third spatial filtering The plurality of transparent portions 128a of the layer 128-3 are arranged at a pitch P3, and the plurality of transparent portions 128a of the spatial filter layer 128-4 are arranged at a pitch P4, and the plurality of transparent portions 128a of the spatial filter layer 128-5 are spaced by a pitch P5. Arrangement, and the pitch P1, the pitch P2, the pitch P3, the pitch P4, and the pitch P5 are substantially equal, but the novel creation is not limited thereto. For example, the pitch P1, the pitch P2, the pitch P3, the pitch P4, and the pitch P5 may all be 50 μm, but the novel creation is not limited thereto.

In this embodiment, one light transmitting portion 128a of the first spatial filtering layer 128-1 has a diameter K1, and one light transmitting portion 128a of the second spatial filtering layer 128-2 has a diameter K2, and the third spatial filtering layer 128-3 A light transmitting portion 128a has a diameter K3, a light transmitting portion 128a of the spatial filtering layer 128-4 has a diameter K4, and a light transmitting portion 128a of the spatial filtering layer 128-5 has a diameter K5, and a diameter K1, a diameter K2, and a diameter K3, diameter K4 and diameter K5 are substantially equal. For example, the diameter K1, the diameter K2, the diameter K3, the diameter K4, and the diameter K5 may all be 15 μm, but the novel creation is not limited thereto.

In this embodiment, the thickness H1 of the first light transmissive layer 126-1, the thickness H2 of the second light transmissive layer 126-2, the thickness H3 of the third light transmissive layer 126-3, and the thickness of the light transmissive layer 126-4. H4 can be 50 μm, 25 μm, 12.5 μm, and 12.5 μm, respectively, but the novel creation is not limited thereto. In addition, in the embodiment, θ may be equal to 60 ^o , but the novel creation is not limited thereto.

It should be noted that, in this embodiment, the plurality of transparent portions 128a of the spatial filter layer 128-5 are arranged at a pitch P (for example, 50 μm), and one of the transparent portions 128a of the spatial filter layer 128-5 has a diameter K ( For example: 15 μm), the spatial filter layer 128-5 is disposed on the light transmissive layer 126-4, and the light transmissive layer 126-4 has a thickness H (for example, 12.5 μm), and the diameter K, the pitch P, and the thickness H satisfy the following formula (1). ): . In this embodiment, the diameter K of the formula (1) may refer to the diameter K5 of one of the transparent portions 128a of the spatial filter layer 128-5, and the distance P between the formulas (1) may refer to a plurality of transparent filter layers 128-5. The pitch P5 of the light portion 128a, the thickness H of the formula (1) may refer to the thickness H4 of the light transmitting layer 126-4, wherein the spatial filtering layer 128-5 is a plurality of first spatial filtering layers 128-1 of the spatial filtering component 120F. a spatial filtering layer closest to the surface 133 of the second spatial filtering layer 128-2, the third spatial filtering layer 128-3, the spatial filtering layers 128-4, 128-5, and the transparent layer 126-4 is spatially filtered. One of the first light transmissive layer 126-1, the second light transmissive layer 126-2, the third light transmissive layer 126-3, and the light transmissive layer 126-4 of the element 120F is closest to the surface 133. However, the novel creation is not limited thereto. In other embodiments, the diameter K of the formula (1) may also refer to the diameter K1 of one of the light transmitting portions 128a of the first spatial filtering layer 128-1 closest to the sensing element 110. The distance P between the formulas (1) may also refer to the pitch P1 of the plurality of light transmitting portions 128a of the first spatial filter layer 128-1 closest to the sensing element 110, and the thickness H of the formula (1) may also refer to the most The thickness H1 of a first light transmissive layer 126-1 of the sensing element 110 is adjacent.

When the diameter K, the pitch P, and the thickness H satisfy the above formula (1), the detecting device 100F can improve the cross-talk problem and obtain a good-quality fingerprint 12 image. The following is exemplified in conjunction with FIGS. 14 to 16.

FIG. 14 shows the light distribution on the plurality of sensing units 120a of the detecting device 100D of FIG. 11 which is simulated. FIG. 15 shows the light distribution on the plurality of sensing units 112 of the detecting device 100E of FIG. 12 simulated. FIG. 16 shows the light distribution on the plurality of sensing units 112 of the detecting device 100F of FIG. 13 which is simulated. The light-emitting elements used to simulate Figures 14, 15 and 16 have the same divergence angle, for example: 180 ^o . 14 and FIG. 15 and FIG. 16, it can be seen that when the diameter K, the pitch P, and the thickness H of the detecting device 100F of FIG. 14 corresponding to FIG. 16 satisfy the above formula (1), the crosstalk problem of the detecting device 100F is remarkably improved.

Referring to FIGS. 11 , 12 , and 13 , each of the detecting device 100D, the detecting device 100E, and the detecting device 100F includes a surface plasmon resonance layer SPR. The functions of the surface plasma resonance layer SPR of the detecting device 100D, the detecting device 100E, and the detecting device 100F are the same as those of the surface plasma resonant layer SPR of the detecting device 100, and will not be repeated here.

Figure 17 is a cross-sectional view showing the detecting device of an embodiment of the present invention. Figure 18 is a top plan view of the reflective element and spatial filter element of the detection device of Figure 17. Referring to FIG. 17, the detecting device 100G is configured to sense a finger (palm) F of a finger (palm). The detecting device 100G includes a sensing component 110, a light guiding component 160, at least one light emitting component 140, a spatial filtering component 120, and a reflection. Element 150. The light guiding element 160 is located on the sensing element 110. At least one light emitting element 140 is disposed beside the light guiding element 160 and configured to emit the sensing light beam L.

The spatial filtering component 120 is located between the light guiding component 160 and the sensing component 110. The spatial filtering component 120 has a plurality of transparent portions 122 and a light blocking portion 124 disposed between the adjacent two transparent portions 122. In this embodiment, for example, each of the transparent portion 122 and the light shielding portion 124 of the spatial filtering component 120 may be a plurality of light transmissive layers (not shown) and a light shielding layer (not shown) along the oblique direction. The direction d is stacked in a non-aligned manner, wherein a plurality of light transmissive layers, multiple light shielding layers, and a possible stacking manner thereof are described in U.S. Patent Application Serial No. 15/989,123. The light guiding element 160 has an upper surface 160a, a lower surface 160b opposite to the upper surface 160a, and a side surface 160c connected between the upper surface 160a and the lower surface 160b. Each of the light transmitting portions 122 extends in the oblique direction d, obliquely The direction d has an angle θ with the normal direction N of the upper surface 160a of the light guiding element 160, and 0 ^o < θ < 90 ^o . For example, in the present embodiment, it is preferable that 30 ^o < θ < 85 ^o . Specifically, in the embodiment, θ may be equal to 42 ^o , but the novel creation is not limited thereto.

The reflective element 150 is located between the lower surface 160b of the light guiding element 160 and the spatial filtering element 120, wherein the reflective element has a plurality of light transmitting portions 152 and at least one reflecting portion 154. Each of the transparent portions 122 of the spatial filter element 120 overlaps with at least one of the transparent portions 152 of the reflective element 150 , and at least one of the reflective portions 154 of the reflective element 150 is disposed on the light blocking portion 124 of the spatial filter element 120 . After the sensing light beam L emitted by the light-emitting element 140 is transmitted to the fingerprint F of the finger, the sensing light beam L is sequentially diffused by the fingerprint F of the finger, passes through the light guiding element 160, passes through the light transmitting portion 152 of the reflective element 150, and passes through. The light transmitting portion 122 of the spatial filter element 120 passes through the sensing element 110. In this embodiment, the light transmitting portion 152 of the reflective element 150 may be a plurality of holes 152h of the reflective layer 150r, and the holes 152h of the reflective layer 150r overlap with the plurality of light transmitting portions 122 of the spatial filter element 120, respectively.

Referring to FIG. 17 and FIG. 18 , the plurality of transparent portions 122 of the spatial filter component 120 are arranged on the sensing component 110 , and each of the transparent portions 122 respectively corresponds to each sensing unit of the sensing component 110 (not drawn Show). The light blocking portion 124 is distributed between the plurality of light transmitting portions 122 , and the reflecting portion 154 of the reflective element 150 is disposed on the light blocking portion 124 . Each of the light transmitting portions 122 has a width W3 in a direction X (indicated in FIG. 18), wherein the direction X is perpendicular to the normal direction N of the upper surface 160a of the light guiding element 160. Each of the light transmitting portions 152 (holes 152h) of the reflecting member 150 (reflecting layer 150r) has a width W4 in the direction X. In this embodiment, W3=W4, but the novel creation is not limited thereto. In other embodiments, W3<W4 or W3>W4 may also be used.

It is to be noted that the sensing light beam L emitted by the light emitting element 140 can be effectively guided to each position of the light guiding element 160 by providing at least one reflecting portion 154 located above the light shielding portion 124, thereby sensing the light beam L. It can be uniformly distributed in the light guiding element 160, and the light intensity of the region of the light guiding element 160 close to the light emitting element 140 is less likely to occur, and the light intensity of the area away from the light emitting element 140 is weak. Thereby, the light beam L emitted from the upper surface 160a of the light guiding element 160 can uniformly illuminate the fingerprint F of the finger, and the image capturing quality of the sensing element 110 is improved.

In this embodiment, the detecting device 100G may further include a first adhesive layer AD1 and a second adhesive layer AD2, wherein the first adhesive layer AD1 is disposed between the light guiding component 160 and the reflective component 150, and the second adhesive layer AD2 is disposed on the first adhesive layer AD2. Between the spatial filtering component 120 and the sensing component 110. In this embodiment, the light guiding component 160 is bonded to the reflective component 150 through the first adhesive layer AD1, and the spatial filter component 120 is bonded to the sensing component 110 through the second adhesive layer AD2, and the first adhesive layer AD1 and the second adhesive layer. The material of AD2 is, for example, Optical Clear Adhesive (OCA) having high light transmittance, but the novel creation is not limited thereto. In other embodiments, the materials of the first adhesive layer AD1 and the second adhesive layer AD2 are other suitable materials, and/or the materials of the first adhesive layer AD1 and the second adhesive layer AD2 may also be different.

In this embodiment, the detecting device 100G further includes a light transmitting component 130 disposed on the upper surface 160a of the light guiding component 160, wherein the light transmitting component 130 has a surface 133 for finger pressing. In this embodiment, the fingerprint F of the finger is placed on the surface 133 of the light transmitting element 130, and the light emitting element 140 emits the sensing light beam L, which is sequentially reflected by the reflective element 150, passes through the light guiding element 160, and passes through The surface 133 of the light element 130 reaches the location of the fingerprint F of the finger.

Figure 19 is a cross-sectional view showing the detecting device of an embodiment of the present invention. Figure 20 is a top plan view of the reflective element and spatial filtering element of the detecting device of Figure 19. Referring to Fig. 19, the detecting device 100H is similar to the detecting device 100G described above. If the two are the same or similar, please refer to the above description, and the description will not be repeated here. The main difference between the detecting device 100H and the detecting device 100G is that the reflecting element 150 in the detecting device 100H is a reflective diffractive element 150d. The reflective diffraction element 150d may include a light transmissive film 150d1 and a reflective pattern layer 150d2 disposed on the light transmissive film 150d1. In the present embodiment, the transparent film 150d1 may be disposed between the reflective pattern layer 150d2 and the spatial filter component 120, but the novel creation is not limited thereto. In other embodiments, the light transmissive film 150d1 may also be disposed between the light guiding element 160 and the reflective pattern layer 150d2.

In the present embodiment, the light transmitting portions 122 of the spatial filter element 120 are arranged in the direction X, each of the light transmitting portions 122 has a width W3 in the direction X, and each of the light transmitting portions 152 of the reflective diffraction element 150d is in the direction X has a width W5 and W5 ≤ W3. For example, the wavelength of the sensing beam L is λ, and (0.01) λ ≤ W5 ≤ (100) λ; that is, the size of the light transmitting portion 152 of the reflective diffractive element 150d and the wavelength of the sensing beam L are It is comparable, and the sensing beam L passes through the light transmitting portion 152 of the reflective diffractive element 150d to cause diffraction.

Referring to FIGS. 17 and 19, each of the detecting device 100G and the detecting device 100H includes a surface Plasmon Resonance layer SPR. The functions of the surface plasma resonance layer SPR of the detecting device 100G and the detecting device 100H are the same as those of the surface plasma resonance layer SPR of the detecting device 100, and will not be repeated here.

Referring to FIG. 19 and FIG. 20, in the embodiment, the plurality of transparent portions 152 of the reflective diffractive element 150d may be a plurality of micro holes u, wherein the transparent portion 152 has a width W5 and a width W5 is a micro hole. The diameter of u. The micro hole u overlaps the light transmitting portion 122 of the spatial filter element 120 and the light blocking portion 124 of the spatial filter element 120, but the novel creation is not limited thereto. In other embodiments, the transparent portion 152 of the reflective diffractive element 150d may also be a slit structure having a width W5 close to the wavelength λ of the sensing beam L, wherein the slit structure is not limited to have a single width W5, and more The arrangement direction of the slit structures is also not limited to be parallel to each other; the plurality of slit structures may have different widths, and the plurality of slit structures may be arranged in parallel or staggered with each other.

In the present embodiment, the sensing beam L produces a diffraction phenomenon on the surface of the reflective diffractive element 150d and is transmitted to the fingerprint F of the finger in a reflective diffraction manner. The fingerprint identification device 100H has similar functions and advantages as the fingerprint identification device 100G described above, and will not be repeated here.

Figure 21 is a top plan view showing a reflective element and a spatial filter element of a detecting device according to an embodiment of the present invention. Referring to FIGS. 20 and 21, the reflective diffractive element 150d' of FIG. 21 differs from the reflective diffractive element 150d of FIG. 20 in that the reflective portion 154 of the reflective diffractive element 150d' of FIG. 21 is a plurality of reflections. The micro point u', and the light transmitting portion 152' of the reflective diffractive element 150d' of Fig. 21 is a light transmitting portion between the plurality of reflecting microdots u'. The reflective diffractive element 150d' of Figure 21 has the same or similar function as the reflective diffractive element 150d of Figure 20, and the reflective diffractive element 150d' of Figure 21 can be used in place of the reflective diffractive element 150d of Figure 19. The detection device constructed in this way is also within the scope of the novel creation.

FIG. 22 is a cross-sectional view showing the fingerprint identification device of another embodiment of the present invention. The detecting device 100I of the present embodiment is similar to the aforementioned detecting device 100D, and the difference is that the spatial filtering component 120I has a plurality of optical channels LC5 and a plurality of optical channels LC6. The plurality of light channels LC5 are parallel and extend in the oblique direction d5, wherein the oblique direction d5 has an angle θ1 with the normal direction N of the surface 133, and 0 ^o < θ1 < 90 ^o . The plurality of light channels LC6 extend in the oblique direction d6, and the oblique direction d6 has an angle θ2 with the normal direction N of the surface 133, and 0 ^o < θ2 < 90 ^o . The oblique direction d5 is staggered with the oblique direction d6. The optical channel LC5 and the optical channel LC6 may cross each other and communicate with each other. The detecting device 100I has similar functions and advantages as the aforementioned detecting device 100D, and will not be repeated here.

In the present embodiment, 35 ^o < θ1 <85 ^o , 35 ^o < θ2 <85 ^o , θ1 and θ2 may be different, but the novel creation is not limited thereto. In the present embodiment, the sensing element 110 includes a light transmissive carrier 110S having a plurality of pixel regions PR and a plurality of photoelectric conversion structures 110C disposed in the plurality of pixel regions PR of the transparent carrier 110S. For example, the sensing element 110 can be a glass based sensor.

In the present embodiment, the light tunnel LC5 extends in a direction that is not parallel to the normal direction N of the surface 133 (i.e., the oblique direction d5), and the light tunnel LC6 is also in a direction N which is not parallel to the normal direction of the surface 133. The direction (ie, the oblique direction d6) extends. However, the novel creation is not limited thereto. In another embodiment, one of the light channel LC5 and the light channel LC6 may extend in a direction parallel to the normal direction N of the surface 133, and the light channel LC5 and the light channel LC6 The other of the others may extend in a direction that is not parallel to the normal direction N of the surface 133. In short, in another embodiment, one of the optical channel LC5 and the optical channel LC6 may be a straight configuration, and the other of the optical channel LC5 and the optical channel LC6 may be an oblique configuration, wherein the light is configured directly The channel is, for example, configured in a non-fingerprint recognition area (or non-visible area).

Figure 23 is a cross-sectional view showing the detecting device of the embodiment of the present invention. Referring to FIG. 23, the detecting device 100J includes a light guiding element 160, a sensing element 110, a surface plasma resonance layer SPR, and a spatial filtering element 120. Light directing element 160 has a top surface 162 and a bottom surface 164 opposite top surface 112. In the present embodiment, the light guiding element 160 is, for example, an optical adhesive layer. However, the novel creation is not limited thereto. In another embodiment, the light guiding element 160 may also be a light transmissive substrate, and the material thereof may be selected from the group consisting of glass, polymethylmethacrylate (PMMA), and polycarbonate. (PC, Polycarbonate) or other suitable light-transmissive material. In the present embodiment, the detecting device 100 may include a light emitting element 140 for emitting the sensing light beam L. In the present embodiment, the light emitting element 140 may be buried in the light guiding element 160 (for example, an optical adhesive layer). However, the novel creation is not limited thereto, and in another embodiment, the light-emitting element 140 may also be disposed outside the light guiding element 160. In this embodiment, the light-emitting element 140 may be a Light-Emitting Diode (LED), but the novel creation is not limited thereto. In other embodiments, the light-emitting element 140 may be other suitable types of light-emitting elements.

The sensing element 110 is disposed beside the bottom surface 164 of the light guiding element 160. For example, in the embodiment, the sensing element 110 is, for example, a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS). However, the novel creation is not limited thereto. In other embodiments, the sensing component 110 may also be other suitable types of image sensors.

The surface plasma resonant layer SPR is disposed on the top surface 162 of the light guiding element 160 and is configured to receive the biopolymer BP. In the present embodiment, the detecting device 100J may also optionally include a cover plate 170 above the top surface 162 of the light guiding element 110 and having a pressing surface 172 on which the finger F can be pressed. In the present embodiment, the surface plasma resonance layer SPR may also be disposed on the pressing surface 172 of the cover plate 170. However, the novel creation is not limited thereto, and in other embodiments, the cover plate 170 may be omitted, and the surface plasma resonance layer SPR may be directly disposed on the top surface 162 of the light guiding element 160.

In this embodiment, the Biopolymers BP may be sweat, saliva, blood, urine, bacteria, viruses or other biopolymers to be detected. Fig. 24 shows the relationship between the incident angle θ _i (which can also be regarded as a reflection angle) of the light beam L incident on the surface plasma resonance layer 130 and its reflectance. Referring to FIG. 23 and FIG. 24, when the sensing light beam L emitted from the light-emitting element 140 is transmitted to the surface plasma resonance layer SPR, the sensing light beam L is totally internally reflected on the surface SPRa of the surface plasma resonance layer SPR (Total Internal Reflection, TIR), an Evanescent Wave is formed in a light-diffusing medium (for example, an environmental medium), and a Surface Plasma Wave is formed in a light-tight medium (for example, a surface plasma resonance layer SPR). At this time, the evanescent wave and the surface plasma wave meet to resonate. When the evanescent wave resonates with the surface plasma wave, most of the energy of the sensing beam L incident on the surface plasma resonance layer SPR is absorbed by the surface plasma wave, and thus is sensed by the reflection of the surface plasma resonance layer SPR. The intensity of the light beam L in a particular direction will be greatly diminished, and the specific angle at this time is called the resonance angle γ (Resonant Angle). In the present embodiment, the resonance angle γ is related to the change in the refractive index of the surface SPRa of the surface plasma resonance layer SPR, that is, the property of the biopolymer BP attached to the surface SPRa of the surface plasma resonance layer SPR (for example) : Dielectric constant) related. By analyzing the distribution of the reflected sensing light beam L formed on the sensing element 110, it is possible to infer why the resonance angle γ is, and to infer the type of the biopolymer BP attached to the surface SPRa of the surface plasma resonance layer SPR. In addition, in the embodiment, the surface SPRa of the surface plasma resonance layer SPR may be selectively a surface modification layer, so that the biopolymer BP can be more easily attached to the surface plasma resonance layer SPR, thereby improving detection. Sensitivity.

The spatial filter component 120 is disposed between the bottom surface 164 of the light guide component 160 and the sensing component 110. The spatial filter component 120 has a plurality of first optical channels LC1 and a plurality of second optical channels LC2 respectively corresponding to the plurality of pixel regions PR1 and the plurality of pixel regions PR2 of the sensing element 110. The plurality of first light channels LC1 extend in the first oblique direction d1, and the plurality of fourth light channels 144 extend in the second oblique direction d2, and the first oblique direction d1 and the second oblique direction d2 are staggered. That is, the normal direction N of the top surface 162 of the light guiding element 160 has an angle α with the extending direction of the first light channel LC1 (ie, the first oblique direction d1), and the normal direction of the top surface 162 of the light guiding element 160 N has an angle β with the extending direction of the second light channel LC2 (ie, the second oblique direction d2), and the angle α is not equal to the angle β.

It is worth noting that the angle β corresponds to the resonance angle γ of the surface plasma resonance layer SPR. That is, the second light channel LC2 has an appropriate tilt angle (ie, the angle β), so that the partially reflected sensing beam L having the resonance angle γ is easily transmitted to the corresponding second light channel LC2 through the second light channel LC2. Pixel area PR2. In this embodiment, the partially reflected reflected light beam transmitted to the pixel region PR1 corresponding to the second light channel LC2 and the partially reflected sensing beam transmitted to the pixel region PR1 corresponding to the first light channel LC1 are detected. It is known whether there is a biopolymer BP to be detected on the surface SPRa of the surface plasma resonance layer SPR by the change in the intensity difference of L. For example, if the intensity of the partially reflected sensing beam L transmitted to the pixel region PR2 corresponding to the second optical channel LC2 becomes small, the portion of the sensing beam that is reflected to the pixel region PR1 corresponding to the first optical channel LC1 is reflected. The difference in intensity between the L and the partially reflected sensing beam L transmitted to the pixel region PR2 of the corresponding second optical channel LC2 becomes larger, and it can be known that the surface SPRa of the surface plasma resonance layer SPR has a biological height of the type to be detected. Polymer BP. In short, since the tilt angle (ie, the angle β) of the second light channel LC2 of the spatial filter element 120 corresponds to the resonance angle γ of the surface plasma resonance layer SPR, the detecting device 100J can easily detect the surface plasma. Whether or not the biopolymer BP of the type to be detected is present on the surface SPRa of the resonance layer SPR.

In this embodiment, the plurality of first light channels LC1 and the plurality of second light channels LC2 are alternately arranged on the sensing element 110. The plurality of first light channels LC1 and the plurality of second light channels LC2 are separated from each other without being in communication with each other. However, the novel creation is not limited thereto. In other embodiments, the first optical channel LC1 and the second optical channel LC2 may also be in communication.

In this embodiment, the angle α may range from 0 ^o to 90 ^o , that is, the extending direction of the first optical channel LC1 (ie, the first oblique direction d1) may not be parallel to the normal direction N of the top surface 162. . However, the novel creation is not limited thereto, and in other embodiments, the extending direction of the first light tunnel LC1 (ie, the first oblique direction d1) may also be parallel to the normal direction N of the top surface 162. In this embodiment, the angle β may range between 0 ^o and 90 ^o , that is, the extending direction of the second optical path LC2 (ie, the second oblique direction d2) may not be parallel to the normal direction N of the top surface 162. . For example, in the present embodiment, the angles α and β can satisfy: α < β. However, the novel creation is not limited thereto. Since the first light channel LC1 is used to pass a portion of the sensing beam L reflected by the biometric feature (eg, fingerprint), the angle α may be based on the biometric feature (eg, fingerprint). The range of the reflection angle of most of the reflected light beam L is determined; since the second light channel LC2 is used to pass a portion of the sensing light beam L reflected by the surface plasma resonance layer SPR and having the resonance angle γ, the angle is β can be determined according to the nature of the biopolymer BP to be detected and the resonance angle γ of the surface plasma resonance layer SPR; the angle β does not have to be larger than the angle α.

In the embodiment, the detecting device 100J may further include a first reflective element R1 disposed on the bottom surface 164 of the light guiding element 160. The sensing beam L is reflected by the surface plasma resonance layer SPR and the first reflective element R1 and transmitted to the sensing element 110. That is, the surface plasma resonance layer SPR can be used to sense the biopolymer BP, and the surface plasma resonance layer SPR can also be used to reflect the sensing beam L having an angle other than the resonance angle γ to increase the sensing beam L. The area that can illuminate a biological feature (eg, finger F). In the present embodiment, the first reflective element R1 and the surface plasma resonance layer SPR partially overlap in the normal direction N. However, the novel creation is not limited thereto.

Figure 25 is a cross-sectional view showing the detecting device of another embodiment of the present invention. The detecting device 100K of FIG. 25 is similar to the detecting device 100J of FIG. 23, and the same technical features are not described herein again, except that the first reflecting element R1 includes a plurality of first reflecting portions R1-1 spaced apart from each other in the light guiding manner. The detecting device 100K further includes a second reflective element R2 disposed on the top surface 162 of the light guiding element 160 and spaced apart from the surface plasma resonant layer SPR. The sensing beam L is reflected by the surface plasma resonance layer SPR, the first reflective element R1 and the second reflective element R2 and transmitted to the sensing element 110. In the embodiment of Figure 25, the second reflective element R2 is a single reflective pattern. However, the present invention is not limited thereto. In other embodiments, the second reflective element R2 may also include a plurality of second reflective portions (not shown) spaced apart from the top surface 162 of the light guiding element 160.

Figure 26 is a cross-sectional view showing a detecting device of still another embodiment of the present invention. The detecting device 100L of FIG. 26 is similar to the detecting device 100J of FIG. 23, and the same technical features are not described herein again. The difference is that the spatial filtering component 120 further has a plurality of third optical channels LC3 and a plurality of fourth optical channels LC4. Corresponding to the plurality of pixel regions PR3 and the plurality of pixel regions PR4 of the sensing element 110, respectively. The plurality of third light channels LC3 extend in the third oblique direction d3, the plurality of fourth light channels LC4 extend in the fourth oblique direction d4, and the third oblique direction d3 is staggered with the fourth oblique direction d4. That is, the normal direction N of the top surface 162 of the light guiding element 160 has an angle β2 with the extending direction of the third light channel LC3 (ie, the third oblique direction d3), and the normal direction of the top surface 162 of the light guiding element 160 N has an angle β3 with the extending direction of the fourth optical path LC4 (ie, the fourth oblique direction d4), and the included angle β2 is not equal to β3. In this embodiment, the first optical channel LC1, the second optical channel LC2, the third optical channel LC3, and the fourth optical channel LC4 are sequentially arranged on the sensing element 110. However, the novel creation is not limited thereto. In other embodiments, the order of arranging the first optical channel LC1, the second optical channel LC2, the third optical channel LC3, and the fourth optical channel LC4 may also be adjusted according to actual conditions. . In this embodiment, the angles β2 and β3 may be located between the angle α and the angle β, that is, α<β2, β3<β, and the angles of the angles α, β, β2, and β3 may be gradually increased, that is, α< 22<β3<β. However, this new creation is not limited to this. In this embodiment, in addition to the spatial filtering component 120 having a plurality of first optical channels LC1, a plurality of second optical channels LC2, a plurality of third optical channels LC3, and a plurality of fourth optical channels LC4, the spatial filtering component 120 further There may be a plurality of optical channels different from the angles α, β, β2, and β3, for example, optical channels having different angles such as a fifth optical channel (not shown) and a sixth optical channel (not shown), and different angles of light flux. The amount of adaptability increases.

It is worth noting that since the resonance angle γ of the surface plasma resonance layer SPR changes due to different kinds of biopolymers BP, a plurality of light beams of different angles α, β, β2, and β3 are disposed in the spatial filter element 120. The channels can respectively correspond to the resonance angle γ generated by the plurality of kinds of biopolymers BP. Therefore, the detecting device 100L can detect more than one kind of biopolymer BP, so that the application range of the detecting device 100B is more diverse. Sex.

In summary, the detecting device of the present invention includes a light guiding element, a sensing element, a surface plasma resonance layer, and a spatial filtering element. The spatial filtering component is provided with a plurality of third optical channels and a fourth optical channel, wherein the third optical channel extends along the first oblique direction, the fourth optical channel extends along the second oblique direction, and the third oblique direction Interlaced with the fourth oblique direction, the fourth oblique direction has an angle β with the normal direction of the top surface of the light guiding element, and the angle β corresponds to the resonance angle γ of the surface plasma resonance layer. A plurality of third optical channels are used to pass the sensing beam reflected by the biometric feature, thereby enabling the sensing component to acquire an image of the biometric feature. A plurality of fourth optical channels are used to pass the sensing beam reflected by the surface plasma resonance layer, thereby determining whether there is a biopolymer of the type to be detected on the surface plasma resonance layer. The detection device of one embodiment of the present invention has multiple functions of biometric identification and biological detection.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the novel creation, and any person skilled in the art can make some changes without departing from the spirit and scope of the novel creation. Retouching, the scope of protection of this new creation is subject to the definition of the scope of the patent application attached.

50‧‧‧Testees

12, 60, F‧‧‧ fingerprints

12a‧‧‧Valley

12b, 62‧‧‧ crest

80, BP‧‧‧ biopolymer

100, 100A, 100B‧‧‧ detection devices

100C, 100D, 100E‧‧‧ detection devices

100F, 100G, 100H‧‧‧ detection devices

100I, 100J, 100K‧‧‧ detection devices

100L‧‧‧Detection device

110‧‧‧Sensor components

110C‧‧‧ photoelectric conversion structure

110S‧‧‧Transparent carrier board

111‧‧‧Sense surface

112‧‧‧Sensor unit

120, 120A, 120B‧‧‧ spatial filter components

120D, 120F, 120I‧‧‧ spatial filter components

120a‧‧‧ Spatial Filter

120a-1‧‧‧First Space Filter

120a-2‧‧‧Second space filter

122, 128a‧‧‧Transmission Department

152, 152'‧‧‧Transmission Department

124, 128b‧‧‧Lighting Department

126, 126-4‧‧ ‧ light transmissive layer

126-1‧‧‧First light transmission layer

126-2‧‧‧Second light transmission layer

126-3‧‧‧The third light transmission layer

128, 128-4, 128-5‧‧‧ spatial filtering layer

128-1‧‧‧First spatial filter layer

128-2‧‧‧Second spatial filter layer

128-3‧‧‧ third spatial filter layer

128a1‧‧‧First light transmission department

128a2‧‧‧Second light transmission department

128a3‧‧‧The third light transmission department

130‧‧‧Lighting components

131‧‧‧ Connection surface

133, S131, S133A‧‧‧ surface

S133B, S1421S‧‧‧ surface

S1441S, SPRa‧‧‧ surface

140, 142‧‧‧Lighting elements

150‧‧‧reflecting elements

150d, 150d'‧‧‧reflective diffractive components

150d1‧‧·transparent film

150d2‧‧‧reflective pattern layer

152h‧‧‧ hole

152r‧‧‧reflective layer

154‧‧‧Reflection Department

160‧‧‧Light guiding elements

160a‧‧‧ upper surface

160b‧‧‧ lower surface

160c‧‧‧ side

162‧‧‧ top surface

164‧‧‧ bottom

170‧‧‧ cover

172‧‧‧ Pressing surface

AD1‧‧‧ first adhesive layer

AD2‧‧‧Second Adhesive Layer

B, B1, B2, B3‧‧‧ beams

C‧‧‧ dent

D‧‧‧ lateral distance

d, d5, d6‧‧‧ oblique direction

D1‧‧‧first oblique direction

D2‧‧‧second oblique direction

D3‧‧‧ third oblique direction

D4‧‧‧4th oblique direction

D’, D’’‧‧‧ longitudinal distance

H, H1, H2, H3, H4‧‧‧ thickness

T1, T2‧‧‧ thickness

H1, h2‧‧‧ height

K, K1~K5‧‧‧ diameter

L, L1~L4‧‧‧ Sense beam

L0‧‧‧Environmental beam

LC1‧‧‧first light channel

LC2‧‧‧Second light channel

LC3‧‧‧ third optical channel

LC4‧‧‧fourth optical channel

LC5, LC6‧‧‧ light channel

N‧‧‧ normal direction

N1‧‧‧ first direction

N2‧‧‧second direction

R1‧‧‧first reflective element

R1-1‧‧‧First reflection

R2‧‧‧ second reflective element

R _es ‧‧‧distance

S, P, P1~P5‧‧‧ spacing

SO1, SO2, SO3‧‧‧ size

SI‧‧‧ inner surface

SPR‧‧‧ surface plasma resonance layer

PR, PR1~PR4‧‧‧ pixel area

T1442‧‧‧ outer surface

U‧‧‧micropores

U’‧‧·reflection micro point

W, W1~W5‧‧‧Width

X‧‧‧ direction

θ, θ1, θ2‧‧‧ angle

α, β, β2, β3‧‧‧ angle

Θi‧‧‧ incident angle

Θr‧‧·reflection angle

Θr1, θr2, θr3‧‧‧ angle

Γ‧‧‧resonance angle

1 is a schematic view and a partially enlarged schematic view of a detecting device according to an embodiment of the present invention. 2 is a top plan view of a detecting device according to an embodiment of the present invention. 3 is an enlarged schematic view of a portion R of the detecting device of FIG. 1. 4 shows the relationship between various reflection angles θr of the sensing light beam L4 reflected by the surface plasma resonance layer SPR and its reflectance. Fig. 5 is a cross-sectional view showing the detecting device of the embodiment of the present invention. Figure 6 is a top plan view of the spatial filtering component of Figure 1. Fig. 7 is a cross-sectional view showing the detecting device of the embodiment of the present invention. 8 and 9 are schematic top views of the detecting device of the embodiment of FIG. 7 with no process tolerances and process tolerances, respectively. Figure 10 is a cross-sectional view showing the detecting device of the embodiment of the present invention. Figure 11 is a cross-sectional view showing the detecting device of an embodiment of the present invention. Figure 12 is a cross-sectional view showing the detecting device of an embodiment of the present invention. Figure 13 is a cross-sectional view showing the detecting device of an embodiment of the present invention. FIG. 14 shows the light distribution on the plurality of sensing units 112 of the detecting device 100D of FIG. 11 which is simulated. FIG. 15 shows the light distribution on the plurality of sensing units 112 of the detecting device 100E of FIG. 12 simulated. FIG. 16 shows the light distribution on the plurality of sensing units 112 of the detecting device 100F of FIG. 13 which is simulated. Figure 17 is a cross-sectional view showing the detecting device of an embodiment of the present invention. Figure 18 is a top plan view of the reflective element and spatial filter element of the detection device of Figure 17. Figure 19 is a cross-sectional view showing the detecting device of an embodiment of the present invention. Figure 20 is a top plan view of the reflective element and spatial filtering element of the detecting device of Figure 19. Figure 21 is a top plan view showing a reflective element and a spatial filter element of a detecting device according to an embodiment of the present invention. Figure 22 is a cross-sectional view showing the detecting device of another embodiment of the present invention. Figure 23 is a cross-sectional view showing the detecting device of the embodiment of the present invention. Fig. 24 shows the relationship between the incident angle θi (which can also be regarded as a reflection angle) of the light beam L incident on the surface plasma resonance layer 130 and its reflectance. Figure 25 is a cross-sectional view showing the detecting device of another embodiment of the present invention. Figure 26 is a cross-sectional view showing a detecting device of still another embodiment of the present invention.

Claims (28)

A detecting device for sensing a biopolymer, the detecting device comprising: a sensing component having a sensing surface and a plurality of sensing units disposed on the sensing surface; a spatial filtering component, And disposed on the sensing surface, and comprising a plurality of spatial filters, wherein each of the spatial filters comprises: a light transmissive layer; and a spatial filtering layer disposed on the light transmissive layer and having a plurality of light transmissive layers And the plurality of light-shielding portions, each of the light-transmitting portions being surrounded by the light-shielding portions, wherein the light-transmitting layers of the plurality of spatial filters and the spatial filtering layers of the spatial filters are in the sensing Stacking alternately in the normal direction of the surface; a light transmissive element disposed on the spatial filter element, the spatial filter element being disposed between the light transmissive element and the sensing element; and a surface plasma resonant layer disposed on The light transmissive element is configured to receive the biopolymer, and the light transmissive element is disposed between the surface plasma resonance layer and the spatial filter element. The detecting device of claim 1, wherein the light shielding portions and the light transmitting portions are alternately arranged on the sensing surface along a first direction and a second direction, the first direction being perpendicular to The second direction, and the first direction and the second direction are both perpendicular to the normal direction of the sensing surface. The detecting device of claim 1, wherein the light transmitting portions of the spatial filtering layers expose the sensing units of the sensing elements, and the light transmitting portions of each of the spatial filtering layers The spacing is S, the width of each of the light transmitting portions is W, and 0.3W<S, and the thickness of the light transmitting layer of a first spatial filter in the spatial filter is T1, and the spatial filtering The thickness of the light transmissive layer of a second spatial filter in the sheet is T2, and the detecting device satisfies: . The detecting device described in claim 3 of the patent application further satisfies: . The detecting device described in claim 3 of the patent application further satisfies: . The detecting device of claim 1, wherein the spatial filtering layer comprises a first spatial filtering layer, a second spatial filtering layer and a third spatial filtering layer, the first spatial filtering layer, the first The two spatial filtering layers and the third spatial filtering layer overlap each other, and the plurality of transparent portions of the first spatial filtering layer include a plurality of first light transmitting portions, and the plurality of light transmitting portions of the second spatial filtering layer include a plurality of a second light transmitting portion, the plurality of light transmitting portions of the third spatial filtering layer include a plurality of third light transmitting portions, and the spatial filtering component satisfies: each of the third light transmitting portions has a size greater than or equal to each of the second light transmitting portions The size of the light transmitting portion, and the size of each of the second light transmitting portions is larger than the size of each of the first light transmitting portions; or the size of each of the third light transmitting portions is larger than the size of each of the second light transmitting portions, and each The size of the second light transmitting portion is greater than or equal to the size of each of the first light transmitting portions. The detecting device of claim 6, wherein each of the third light transmitting portions has a size larger than a size of each of the second light transmitting portions, and each of the second light transmitting portions has a size larger than each of the first light transmitting portions. a size of the portion, and the first spatial filter layer, the second spatial filter layer, and the third spatial filter layer are arranged from the sensing element toward the light transmissive element or from the light transmissive element toward the sensing element. The detecting device of claim 1, wherein the light transmitting portions of the spatial sensing layer corresponding to the sensing unit of the sensing element are arranged along an oblique direction, the oblique direction and the The normal direction of the surface of one of the light transmissive elements has an included angle θ, and 0 ^o < θ < 90 ^o . The detecting device of claim 8, wherein the light transmitting portions of the spatial filtering layer are arranged at a pitch P, and at least one of the light transmitting portions of the spatial filtering layer has a diameter K, the light transmitting layer having a thickness H, the diameter K, the spacing P and the thickness H satisfy: . The detecting device of claim 8, wherein the plurality of light transmitting portions of the spatial filtering layer closest to the sensing element of the spatial filtering layer are respectively associated with the sensing element The sensing units are aligned, and the plurality of light transmissive portions of the other spatial filtering layers of the spatial filtering component are not aligned with the sensing units of the sensing element. The detecting device of claim 1, further comprising: a light guiding component disposed on the sensing component; at least one light emitting component disposed adjacent to the light guiding component and configured to emit a light beam; a reflective element, located between the light guiding element and the spatial filtering component, wherein the reflective component has a plurality of transparent portions, each of the transparent portions of the spatial filtering component overlapping at least one of the transparent portions of the reflective component The light beam is sequentially diffused by a fingerprint of a finger, passes through the light guiding element, passes through at least one of the light transmitting portions of the reflective element, and passes through each of the light transmitting portions of the spatial filtering element to transmit To the sensing element. The detecting device of claim 11, wherein the reflecting element has at least one reflecting portion, and the at least one reflecting portion of the reflecting element is disposed on the light shielding portions of the spatial filtering element. The detecting device of claim 11, wherein the transparent portions of the reflective element are a plurality of holes of a reflective layer, and the holes of the reflective layer are respectively transparent to the plurality of spatial filtering elements The light parts overlap. The detecting device of claim 11, wherein the reflecting element is a reflective diffractive element. The detecting device of claim 14, wherein the light transmitting portions of the spatial filtering component are arranged in a direction, each of the light transmitting portions having a width W3 in the direction, the reflective diffractive component Each of the light transmitting portions has a width W5 in the direction, and W5 ≤ W3. The detecting device of claim 14, wherein the reflective diffractive element comprises: a light transmissive film; and a reflective pattern layer disposed on the light transmissive film. The detecting device according to any one of claims 1 to 16, wherein the light transmitting portions of the spatial filtering layers alternately stacked in the normal direction of the sensing surface are respectively formed to correspond to the sensing a plurality of light channels of the unit, at least two of the light channels being non-parallel to each other. A detecting device comprising: a light guiding element having a top surface and a bottom surface opposite to the top surface; a sensing element disposed beside the bottom surface of the light guiding element; a surface plasma resonance layer disposed on The top surface of the light guiding element is configured to receive a biopolymer; and a spatial filtering component is disposed between the bottom surface of the light guiding component and the sensing component, wherein the spatial filtering component has a plurality of a first optical channel and a plurality of second optical channels, wherein the first optical channels extend in a first oblique direction, and the second optical channels extend in a second oblique direction, the first oblique direction The direction is staggered with the second oblique direction, the normal direction of the top surface of the light guiding element has an angle β with the second oblique direction, and the angle β corresponds to a resonance angle γ of the surface plasma resonance layer . The detecting device of claim 18, wherein the first optical channels and the second optical channels are alternately arranged. The detecting device of claim 18, wherein the normal direction of the top surface of the light guiding element has an angle α with the first oblique direction. The detecting device according to claim 20, wherein the angle α and the angle β satisfy: α<β. The detecting device of claim 18, further comprising: a first reflective element disposed on the bottom surface of the light guiding element, wherein a light beam is reflected by the surface plasma resonant layer and the first reflective element It is then passed to the sensing element. The detecting device of claim 22, wherein the first reflective element comprises: a plurality of first reflecting portions spaced apart on the bottom surface of the light guiding element. The detecting device of claim 22, further comprising: a second reflective element disposed on the top surface of the light guiding element and spaced apart from the surface plasma resonant layer, wherein the light beam is The surface plasma resonant layer, the first reflective element and the second reflective element are reflected and transmitted to the sensing element. The detecting device of claim 22, wherein the light beam is reflected by the surface plasma resonance layer and transmitted to the first reflective element. The detecting device of claim 18, wherein the spatial filtering component further has a plurality of third optical channels and a plurality of fourth optical channels, the third optical channels extending in a third oblique direction, The fourth optical channels extend in a fourth oblique direction, the third oblique direction is interlaced with the fourth oblique direction, the normal direction of the top surface of the light guiding element and the third oblique direction The direction has an angle β2, and the normal direction of the top surface of the light guiding element has an angle β3 with the fourth oblique direction, and the angle β2 and the angle β3 satisfy: α<β2, β3<β. The detecting device of claim 26, wherein the first optical channel, the second optical channel, the third optical channel, and the fourth optical channel are sequentially arranged on the sensing element. The detecting device according to claim 27, wherein the angle β2 and the angle β3 satisfy: α<β2<β3<β.