Contact image sensor

Abstract

The present invention provides a contact image sensor. The contact image sensor includes: a frame; a light source structure disposed within the frame; a lens structure disposed within the frame, the lens structure being used for converging light beams; a plurality of photosensitive structures disposed within the frame, the photosensitive structures being located on one side of the lens structure, and the light source structure being located on the peripheral side of the lens structure; a dispersion portion for decomposing a composite light into a plurality of monochromatic lights, the dispersion portion being disposed within the frame, along the propagation path of the reflected light of the object to be scanned, the dispersion portion being located between the lens structure and the photosensitive structures, the dispersion portion having an incident light surface located on the extension line of the optical axis of the lens structure, and there being an included angle between the incident light surface and the optical axis of the lens structure, so that a plurality of monochromatic light beams formed after being decomposed by the dispersion portion are correspondingly incident into the plurality of photosensitive structures. The technical solution of the present invention solves the problem that the contact image sensor in the prior art is prone to color fringing phenomenon.

Description

Technical Field

[0001] The present invention relates to the technical field of image scanning, and in particular to a contact image sensor. Background Art

[0002] In the prior art, there are many types of color contact image sensors: one is to light up a three-color light source in a time-sharing manner and illuminate the object to be scanned, and then the light is reflected to the contact image sensor, so that three adjacent rows of three-color scanning data can be generated to synthesize a row of color image. Because the object to be scanned is still moving during the time-sharing scanning, the color components of each row of color image scanned are actually three rows of data, so the image generated has a color edge phenomenon; the second type of contact image sensor uses a high-resolution single-row photoelectric conversion chip, and then every three adjacent light holes are respectively plated with red, green and blue three-color filter films, and then three adjacent pixels can be synthesized into a color pixel. After the contact image sensor scans, it finally synthesizes a color image. In this way, the three adjacent light holes may not receive light information at the same position on the object to be scanned, so the synthesis of three pixels into a color pixel will lead to the problem of inaccurate synthesis of color data at the graphic boundary, that is, the color edge phenomenon occurs.

[0003] That is to say, the contact image sensor in the prior art has the problem of prone to color fringing. Summary of the invention

[0004] The main purpose of the present invention is to provide a contact image sensor to solve the problem that the contact image sensor in the prior art is prone to color fringing.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a contact image sensor, comprising: a frame; a light source structure, arranged in the frame; a lens structure, arranged in the frame, the lens structure is used to converge a light beam; a plurality of photosensitive structures, arranged in the frame, the photosensitive structure is located on one side of the lens structure, and the light source structure is located on the peripheral side of the lens structure; a dispersion portion, used to decompose complex light into a plurality of monochromatic lights, the dispersion portion being arranged in the frame, and being located between the lens structure and the photosensitive structure along the propagation path of the reflected light of the object to be scanned, the dispersion portion having a light incident surface located on the extension line of the optical axis of the lens structure, and an angle being formed between the light incident surface and the optical axis of the lens structure, so that the plurality of monochromatic light beams formed after being decomposed by the dispersion portion are correspondingly incident on the plurality of photosensitive structures.

[0006] Furthermore, the dispersion portion includes a prism structure, the prism structure has an incident surface and an exit surface set at an angle A with the incident surface, the incident surface is set toward the lens structure, the exit surface is set toward the photosensitive structure, and the incident surface forms a light incident surface.

[0007] Further, the included angle A satisfies: 6° ≤ A ≤ 82°, and / or, there is an included angle B between the incident surface and the optical axis of the lens structure, and the included angle B satisfies: 5° ≤ B ≤ 175°.

[0008] Further, the prism structure is a triangular prism.

[0009] Further, the contact image sensor further includes a first substrate disposed within the frame. The first substrate is parallel to the optical axis of the lens structure or the first substrate is disposed obliquely with respect to the optical axis, and a plurality of photosensitive structures are sequentially arranged along the width direction of the first substrate.

[0010] Further, the contact image sensor includes three photosensitive structures, and the contact image sensor further includes three filter structures correspondingly arranged with the three photosensitive structures. The colors of the three filter structures are red, green, and blue in sequence or blue, green, and red in sequence.

[0011] Further, a first recessed portion, a mounting through-hole, and a second recessed portion that are sequentially communicated are provided on the frame. Along the propagation path of the reflected light, the openings of the first recessed portion and the second recessed portion are respectively located on opposite sides of the dispersion portion. Among them, the light source structure is located within the first recessed portion, the lens structure is located within the mounting through-hole, and the dispersion portion and the photosensitive structure are located within the second recessed portion.

[0012] Further, the contact image sensor further includes a light-transmitting plate disposed on the frame, and the light-transmitting plate is used to encapsulate the light source structure within the first recessed portion; or, the contact image sensor further includes a cover plate disposed on the frame, and the cover plate is used to encapsulate the dispersion portion and the photosensitive structure within the second recessed portion.

[0013] Further, the contact image sensor further includes a light-shielding structure located within the first recessed portion. The light-shielding structure is located on the outer periphery of the lens structure to form a mounting through-hole for accommodating the lens structure.

[0014] Further, the light source structure includes: a second substrate disposed on the frame; and a plurality of light sources linearly arranged on the second substrate.

[0015] When the technical solution of the present invention is applied, when the contact image sensor is working, the composite light beam emitted by the light source structure will irradiate the object to be scanned, then be reflected by the object to be scanned onto the lens structure, and then be converged by the lens structure and irradiate onto the dispersion part. Since the dispersion part can decompose the composite light into multiple monochromatic lights, therefore, the composite light beam converged by the lens structure can be split into multiple monochromatic light beams after being split by the dispersion part. Then, the above-mentioned multiple monochromatic light beams can be respectively incident into a plurality of photosensitive structures arranged corresponding to them. In this way, the data of the same row of the object to be scanned scanned by the contact image sensor will be simultaneously subjected to photoelectric conversion on a plurality of photosensitive structures, and then the data on these plurality of photosensitive structures will be synthesized into a color image. Since the plurality of photosensitive structures receive the plurality of monochromatic light beams of the same row of the object to be scanned at the same time and synthesize a color image after photoelectric conversion, the phenomenon of color fringes can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 The structural schematic diagram of the contact image sensor according to the embodiment of the present invention is shown;

[0018] Figure 2 shows Figure 1 The structural schematic diagram of the contact image sensor (wherein, the light path is shown);

[0019] Figure 3 shows Figure 1 The structural schematic diagram of the photosensitive structure and the first substrate of the contact image sensor;

[0020] Figure 4 shows Figure 1 When the contact image sensor is scanning, the schematic diagram of the light path of the light beam propagating in the lens structure and the dispersion part; and

[0021] Figure 5 The schematic diagram showing that the composite light beam is decomposed into multiple monochromatic light beams by the dispersion part according to the embodiment of the present invention.

[0022] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0023] 101, frame; 102, light-transmitting plate; 103, lens structure; 105, light source structure; 106, photosensitive structure; 107, photosensitive element; 108, dispersion part; 11, incident surface; 12, exit surface; 13, first substrate; 151, first recess; 152, mounting through hole; 153, second recess; 16, cover plate; 17, light-shielding structure. Detailed implementation mode

[0024] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0025] It should be noted that in the embodiments of the present invention, the LED white light is mainly mixed white light, and the mixed white light is generated by mixing blue light excited phosphor or formed by simultaneously lighting red, green, and blue LED lights. The spectrum is mixed but not continuous, mainly including blue, green, and red spectra. Therefore, the white light (composite light beam) can be dispersed into blue, green, and red light beams after dispersion.

[0026] As Figure 1 shown, the embodiments of the present invention provide a contact image sensor. The contact image sensor includes a frame 101, a light source structure 105, a lens structure 103, a plurality of photosensitive structures 106, and a dispersion unit 108. Among them, the light source structure 105 is arranged in the frame 101; the lens structure 103 is arranged in the frame 101, and the lens structure 103 is used to converge the light beam; a plurality of photosensitive structures 106 are arranged in the frame 101, the photosensitive structure 106 is located on one side of the lens structure 103, and the light source structure 105 is located on the periphery of the lens structure 103; the dispersion unit 108 is used to decompose the composite light into multiple monochromatic lights, the dispersion unit 108 is arranged in the frame 101, along the propagation path of the reflected light of the object to be scanned, the dispersion unit 108 is located between the lens structure 103 and the photosensitive structure 106, and the dispersion unit 108 has an incident light surface located on the extension line of the optical axis of the lens structure 103, and there is an included angle between the incident light surface and the optical axis of the lens structure 103, so that the multiple monochromatic light beams formed after being decomposed by the dispersion unit 108 are correspondingly incident on the plurality of photosensitive structures 106.

[0027] In the above technical solution, when the contact image sensor works, the composite light beam emitted by the light source structure 105 will first irradiate the object to be scanned, then be reflected by the object to be scanned onto the lens structure 103, and then pass through the lens structure 103 and converge onto the dispersion unit 108. Since the dispersion unit 108 can decompose the composite light into multiple monochromatic lights, the composite light beam converged by the lens structure 103 can be split into multiple monochromatic light beams after being split by the dispersion unit 108. Then, the above multiple monochromatic light beams can be respectively incident on the corresponding plurality of photosensitive structures 106. In this way, the data of the same row of the object to be scanned scanned by the contact image sensor will be simultaneously subjected to photoelectric conversion on the plurality of photosensitive structures 106, and then the data on these plurality of photosensitive structures 106 will be synthesized into a color image. Since the plurality of photosensitive structures 106 receive the multiple monochromatic light beams of the same row of the object to be scanned at the same time and synthesize a color image after photoelectric conversion, the phenomenon of color fringes can be avoided.

[0028] As Figure 1 shown, in an embodiment of the present invention, the dispersion unit 108 includes a prism structure. The prism structure has an incident surface 11 and an exit surface 12 disposed at an angle A with respect to the incident surface 11. The incident surface 11 faces the lens structure 103, the exit surface 12 faces the photosensitive structure 106, and the incident surface 11 forms an incident light surface.

[0029] With the above arrangement, the prism structure can decompose the reflected light beam reflected by the object to be scanned into a plurality of monochromatic light beams arranged in sequence, so that multiple monochromatic light beams can be respectively incident into a plurality of photosensitive structures 106 arranged corresponding thereto. In this way, multiple photosensitive structures 106 can simultaneously receive the light information of the same row of the object to be scanned, and convert the above light information into photoelectricity and then synthesize color data. In this way, the occurrence of color fringing can be effectively avoided.

[0030] Of course, in an alternative embodiment not shown in the drawings, the dispersion unit may also include a diffraction grating, as long as it can disperse the composite light beam into a plurality of monochromatic light beams.

[0031] Preferably, as Figure 1 shown, in an embodiment of the present invention, the angle A satisfies: 6° ≤ A ≤ 82°. In this way, the prism structure can decompose the reflected light beam reflected by the object to be scanned into a plurality of monochromatic light beams arranged in sequence.

[0032] As Figure 1 shown, in an embodiment of the present invention, there is an angle B between the incident surface 11 and the optical axis of the lens structure 103, and the angle B satisfies: 5° ≤ B ≤ 175°.

[0033] With the above arrangement, the reflected light beam converged by the lens structure 103 can enter the prism structure and can be decomposed into a plurality of monochromatic light beams arranged in sequence by the prism structure, and multiple monochromatic light beams can also be converged in the same plane, that is, enter a plurality of corresponding photosensitive structures 106. In this way, multiple photosensitive structures 106 can simultaneously receive the light information of the same row of the object to be scanned, and convert the above light information into photoelectricity and then synthesize color data. In this way, the occurrence of color fringing can be effectively avoided.

[0034] As Figure 1 and Figure 2 shown, in an embodiment of the present invention, the prism structure is a triangular prism.

[0035] With the above arrangement, the triangular prism can decompose the composite light beam into a plurality of monochromatic light beams, that is, decompose the white light emitted by the light source structure 105 into three light beams of red, green, and blue, so that the three light beams are respectively irradiated onto the corresponding three photosensitive structures 106, so that the contact image sensor can collect the color data of the same row and the same moment of the object to be scanned, thereby avoiding the occurrence of color fringing.

[0036] It should be noted that in the embodiments of the present invention, after the compound color light is dispersed by the triangular prism, it can generally be divided into three beams of red, green, and blue. After being focused, the three beams are respectively irradiated onto the corresponding photosensitive structure 106.

[0037] Specifically, in the embodiments of the present invention, when white light passes through the triangular prism, a dispersion phenomenon will occur, and the beam after being focused by the lens structure 103 will still be in a focused state after passing through the triangular prism, as Figure 4 and Figure 5 shown. Finally, each of the red, green, and blue light beams will have a focused imaging point, and these three imaging points are basically in the same plane in physical space, that is, when the three photosensitive structures 106 are in the same plane, the simultaneous reception of the three beams can be achieved.

[0038] Preferably, in the embodiments of the present invention, the triangular prism is a triangular prism with an equilateral triangle cross-section. In this way, the included angle A is equal to 60°. At this time, the included angle B is preferably between 4° and 56°. In this way, an existing triangular prism can be directly used, thereby reducing the manufacturing cost.

[0039] As Figure 2 and Figure 3 shown, in the embodiments of the present invention, the contact image sensor further includes a first substrate 13 disposed within the frame 101. The first substrate 13 is parallel to the optical axis of the lens structure 103, and a plurality of photosensitive structures 106 are arranged in sequence along the width direction of the first substrate 13.

[0040] Through the above arrangement, when the compound color light beam is decomposed into multiple monochromatic light beams by the triangular prism, the multiple monochromatic light beams will be sequentially focused on a plane along a preset direction. By arranging a plurality of photosensitive structures 106 in the extending direction of the optical axis of the lens structure 103, the plurality of photosensitive structures 106 can be correspondingly arranged with the multiple monochromatic light beams, so as to better receive the multiple monochromatic light beams.

[0041] Of course, in an alternative embodiment not shown in the drawings, the first substrate 13 can be arranged obliquely with respect to the optical axis, as long as the plurality of photosensitive structures 106 on the first substrate 13 can receive the multiple monochromatic light beams.

[0042] Specifically, as Figure 3 shown, in the embodiments of the present invention, the photosensitive structure 106 includes a plurality of photosensitive elements 107 arranged in sequence along the length direction of the first substrate 13. In this way, the contact image sensor can scan the upper part of the object to be scanned, and then as the object to be scanned moves, the contact image sensor can scan the entire object to be scanned.

[0043] Preferably, in the embodiments of the present invention, the first substrate 13 is a PCB board.

[0044] As Figure 2 and Figure 3 shown, in an embodiment of the present invention, the contact image sensor includes three photosensitive structures 106, and the contact image sensor further includes three filter structures correspondingly arranged with the three photosensitive structures 106. The three filter structures are a red filter structure, a green filter structure, and a blue filter structure. Or, a blue filter structure, a green filter structure, and a red filter structure.

[0045] Through the above arrangement, the three filter structures can respectively filter the light beams entering the three photosensitive structures 106, so as to ensure that the three monochromatic light beams can respectively enter the corresponding three photosensitive structures 106. The three photosensitive structures 106 can respectively receive red, green, and blue light beams or blue, green, and red light beams, so that the blue light beam can be prevented from entering the photosensitive structure 106 with a red or green filter structure. Similarly, the red light beam can be made to only enter the photosensitive structure 106 with a red filter structure, and the green light beam can be made to enter the photosensitive structure 106 with a green filter structure, thereby avoiding the problem of scanning color deviation of the contact image sensor caused by the three monochromatic light beams not entering the corresponding photosensitive structures 106, that is, when the red, green, and blue components of the same pixel of the scanned picture change, the color will change. In this way, the scanned picture will show a color deviation phenomenon.

[0046] Preferably, in an embodiment of the present invention, the filter structure is generally a filter.

[0047] Certainly, in an alternative embodiment not shown in the drawings, the contact image sensor may not be provided with a filter structure, that is, the problem of easy occurrence of scanning color fringes in the contact image sensor in the prior art can be solved only by providing the dispersion part 108.

[0048] It should be noted that in an embodiment of the present invention, scanning color deviation means that the color of the scanned picture does not match the color of the actual object to be scanned.

[0049] As Figure 1 shown, in an embodiment of the present invention, the frame 101 is provided with a first recess 151, a mounting through hole 152, and a second recess 153 that are sequentially connected and communicated. Along the propagation path of the reflected light, the openings of the first recess 151 and the second recess 153 are respectively located on opposite sides of the dispersion part 108. Among them, the light source structure 105 is located in the first recess 151, the lens structure 103 is located in the mounting through hole 152, and the dispersion part 108 and the photosensitive structure 106 are located in the second recess 153.

[0050] Through the above settings, the light source structure 105, the lens structure 103, the dispersion unit 108, and the photosensitive structure 106 can be better installed in the frame 101, and the lens structure 103, the dispersion unit 108, and the photosensitive structure 106 can be arranged in sequence along the propagation path of the reflected light, so that the contact image sensor can realize the imaging function; further, by providing the first recess 151 and the second recess 153 with opposite opening directions, in this way, it is more convenient to install the light source structure 105 and the photosensitive structure 106.

[0051] As Figure 1 shown, in the embodiment of the present invention, the contact image sensor further includes a light transmissive plate 102 provided on the frame 101, and the light transmissive plate 102 is used to encapsulate the light source structure 105 in the first recess 151.

[0052] Through the above settings, the light transmissive plate 102 can prevent dust or moisture from adhering to the light source structure 105, thereby improving the image quality of the scanned image.

[0053] Preferably, in the embodiment of the present invention, the light transmissive plate 102 can be made of glass or transparent plastic.

[0054] As Figure 1 shown, in the embodiment of the present invention, the contact image sensor further includes a cover plate 16 provided on the frame 101, and the cover plate 16 is used to encapsulate the dispersion unit 108 and the photosensitive structure 106 in the second recess 153.

[0055] Through the above settings, the cover plate 16 can prevent dust or moisture from adhering to the area of the photosensitive structure 106 for receiving the light beam, thereby improving the image quality of the scanned image.

[0056] Preferably, in the embodiment of the present invention, the opening of the second recess 153 is located Figure 1 in the right side, and the cover plate 16 is provided at the above opening, and the photosensitive structure 106 is provided on the side of the cover plate 16 facing the second recess 153. In this way, the photosensitive structure 106 is first installed on the cover plate 16, and then the cover plate 16 is installed on the frame 101, thus facilitating the installation of the photosensitive structure 106.

[0057] As Figure 1 shown, in the embodiment of the present invention, the contact image sensor further includes a light shielding structure 17 located in the first recess 151, and the light shielding structure 17 is located on the outer periphery of the lens structure 103 to form an installation through hole 152 for accommodating the lens structure 103.

[0058] With the above settings, the light-shielding structure 17 can separate the first recess 151 and the second recess 153. In this way, the light beam emitted by the light source structure 105 can be prevented from directly irradiating into the photosensitive structure 106 and the dispersion section 108, thereby avoiding affecting the imaging quality of the contact image sensor. The light-shielding structure 17 can also separate the first recess 151 and the mounting through-hole 152. In this way, the light beam emitted by the light source structure 105 can be prevented from directly irradiating into the lens structure 103, thereby avoiding affecting the lens structure 103 from converging the reflected light. In this way, the imaging quality of the contact image sensor can be guaranteed.

[0059] In an embodiment of the present invention, the light source structure 105 includes a second substrate and a plurality of light sources. Among them, the second substrate is disposed on the frame 101; the plurality of light sources are linearly arranged on the second substrate.

[0060] With the above settings, the light source structure 105 can emit multiple light beams, which can improve the brightness of the light emitted by the light source structure 105, increase the light intensity of the light source structure 105, so that the scanned image has sufficient brightness to meet its usage requirements.

[0061] Preferably, in an embodiment of the present invention, the light source can be an LED chip, which can emit light of any wavelength band.

[0062] Preferably, in an embodiment of the present invention, the plurality of light source chips are linearly arranged along the length direction of the second substrate, and the plurality of light sources are linearly arranged along the width direction of the second substrate. In this way, a surface light source can be formed, thereby increasing the intensity of the emitted light.

[0063] Preferably, in an embodiment of the present invention, the second substrate is a PCB board.

[0064] Preferably, in the implementation of the present invention, the contact image sensor includes two light source structures 105, and the two light source structures 105 are respectively located on opposite sides of the lens structure 103. In this way, the intensity of the light irradiated on the object to be scanned can also be increased.

[0065] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: When the contact image sensor is working, the composite light beam emitted by the light source structure will first irradiate the object to be scanned, and then be reflected by the object to be scanned to the lens structure, and then be converged by the lens structure and irradiated onto the dispersion part. Since the dispersion part can decompose the composite light into multiple monochromatic lights, the composite light beam converged by the lens structure can be split into multiple monochromatic light beams after being dispersed by the dispersion part. Then, the above multiple monochromatic light beams can be respectively incident into a plurality of photosensitive structures arranged correspondingly. In this way, the data of the same row of the object to be scanned by the contact image sensor will be simultaneously subjected to photoelectric conversion on a plurality of photosensitive structures, and then the data on these plurality of photosensitive structures will be combined into a color image. Since the plurality of photosensitive structures receive the multiple monochromatic light beams of the same row of the object to be scanned at the same time and synthesize a color image after photoelectric conversion, the phenomenon of color fringes can be avoided.

[0066] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A contact image sensor, characterized in that, Comprising: A frame (101); A light source structure (105), disposed within the frame (101); A lens structure (103), disposed within the frame (101), the lens structure (103) being configured to converge light beams; A plurality of photosensitive structures (106), disposed within the frame (101), the photosensitive structures (106) being located on one side of the lens structure (103), and the light source structure (105) being located on the peripheral side of the lens structure (103); A dispersion unit (108) for decomposing polychromatic light into a plurality of monochromatic lights, the dispersion unit (108) being disposed within the frame (101), along the propagation path of the reflected light of the object to be scanned, the dispersion unit (108) being located between the lens structure (103) and the photosensitive structures (106), the dispersion unit (108) having an incident surface on the extension line of the optical axis of the lens structure (103), and there being an angle between the incident surface and the optical axis of the lens structure (103), so that a plurality of monochromatic light beams formed after being decomposed by the dispersion unit (108) are correspondingly incident on the plurality of photosensitive structures (106); The dispersion unit (108) includes a prism structure, the prism structure having an incident surface (11) and an exit surface (12) disposed at an angle A with respect to the incident surface (11), the incident surface (11) facing the lens structure (103), the exit surface (12) facing the photosensitive structures (106), and the incident surface (11) forming the incident surface; The contact image sensor includes three photosensitive structures (106), and the contact image sensor further includes three filter structures correspondingly disposed with the three photosensitive structures (106), and the colors of the three filter structures are successively red, green, blue or blue, green, red; The angle A satisfies: 6° ≤ A ≤ 82°, and / or, there is an angle B between the incident surface (11) and the optical axis of the lens structure (103), and the angle B satisfies: 5° ≤ B ≤ 175°.

2. The contact image sensor according to claim 1, characterized in that, The prism structure is a triangular prism.

3. The contact image sensor according to claim 1 or 2, characterized in that, The contact image sensor further includes a first substrate (13) disposed within the frame (101), the first substrate (13) being parallel to the optical axis of the lens structure (103) or the first substrate (13) being inclined with respect to the optical axis, and the plurality of photosensitive structures (106) are successively arranged along the width direction of the first substrate (13).

4. The contact image sensor according to claim 1 or 2, characterized in that, The frame (101) is provided with a first recessed portion (151), a mounting through hole (152) and a second recessed portion (153) that are successively connected and communicated. Along the propagation path of the reflected light, the openings of the first recessed portion (151) and the second recessed portion (153) are respectively located on opposite sides of the dispersion unit (108). Among them, the light source structure (105) is located within the first recessed portion (151), the lens structure (103) is located within the mounting through hole (152), and the dispersion unit (108) and the photosensitive structures (106) are located within the second recessed portion (153).

5. The contact image sensor according to claim 4, characterized in that, The contact image sensor further includes a light transmissive plate (102) disposed on the frame (101), and the light transmissive plate (102) is configured to encapsulate the light source structure (105) within the first recess (151); alternatively, the contact image sensor further includes a cover plate (16) disposed on the frame (101), and the cover plate (16) is configured to encapsulate the dispersion portion (108) and the photosensitive structure (106) within the second recess (153).

6. The contact image sensor according to claim 4, wherein, The contact image sensor further includes a light shielding structure (17) within the first recess (151), and the light shielding structure (17) is located on the outer periphery of the lens structure (103) to form a mounting through hole (152) for accommodating the lens structure (103).

7. The contact image sensor according to claim 1 or 2, characterized in that, The light source structure (105) includes: a second substrate disposed on the frame (101); a plurality of light sources linearly arranged on the second substrate.

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