CN204334725U - contact image sensor - Google Patents

Abstract

The utility model provides a kind of contact-type image sensor.This contact-type image sensor comprises: holder housing, and a sidewall of holder housing is provided with transparent panel structure; Lens arrangement, lens arrangement comprises one group of lens post, one group of lens post stacked formation plate body parallel to each other, and plate body is arranged relative to transparent panel structure vertical, and the stacked direction of the bearing of trend relative lens post of each lens post has angle of inclination.This contact-type image sensor small volume, compact conformation.

Description

contact image sensor

technical field

The utility model relates to the field of image scanning equipment, in particular to a contact image sensor.

Background technique

At present, with the continuous improvement of anti-counterfeiting technology, anti-counterfeiting technologies such as holographic images and color-changing inks have been more and more widely used. Therefore, it is required to use machines to efficiently identify anti-counterfeiting marks such as holographic images and color-changing inks. In the existing recognition technology of anti-counterfeiting marks such as holographic images and color-changing inks using contact image sensors, it is mainly to change the incident angle of the light source or the receiving angle of the lens, or both to change and collect different image information or color information. The purpose of identifying authenticity can be achieved by comparing the information collected from different angles.

However, under normal circumstances, if you want to change the incident angle of the light source or the receiving angle of the lens, you need to change the structure of the product, resulting in larger product size and poor versatility and interchangeability.

Utility model content

The main purpose of the utility model is to provide a contact image sensor to solve the problem of large volume of the contact image sensor in the prior art.

In order to achieve the above object, according to one aspect of the present invention, a contact image sensor is provided, which includes: a mounting housing, a transparent plate structure is arranged on a side wall of the mounting housing; a lens structure, The lens structure includes a group of lens columns. A group of lens columns are stacked parallel to each other to form a plate body. The plate body is vertically arranged relative to the transparent plate structure. The extension direction of each lens column has an oblique angle relative to the stacking direction of the lens columns.

Further, the lens structure further includes a lens protection case, and the lens protection case covers the outer periphery of the board body.

Further, the lens structure includes two sets of lens columns, respectively the first lens column group and the second lens column group, the extending direction of the lens columns in the first lens column group is different from the extending direction of the lens columns in the second lens column group different.

Further, the stacking direction of the lens columns of the first lens column group and the stacking direction of the lens columns of the second lens column group are on the same straight line.

Further, the contact image sensor further includes a light source, which is disposed in the installation housing to emit light toward the transparent plate structure.

Further, the contact image sensor also includes a light source group, the light source group is arranged in the installation housing, and the light source group includes at least two light sources, one of which is arranged on one side of the lens structure, and the other light source is arranged on the other side of the lens structure .

Further, the contact image sensor further includes a processing unit, which is arranged on a side of the lens structure away from the transparent plate structure, and receives and processes the reflected light processed by the lens structure.

Further, the processing unit includes: a photosensitive part, which receives reflected light and outputs an electrical signal according to the reflected light; a substrate, on which the photosensitive part is arranged.

Further, the photosensitive part is a photosensitive integrated circuit, and the photosensitive part is arranged in a straight line on the substrate.

Further, the lens protective case includes: a first half board, a first half groove is provided on the first half board; a second half board, a second half groove is arranged on the second half board, the second half board is connected with the first half board The boards are relatively arranged, the first half groove and the second half groove enclose an installation space, and the lens column is fixedly placed in the installation space.

Further, the lens column is a self-focusing lens column.

Applying the technical solution of the utility model, the contact image sensor includes an installation housing and a lens structure, and a transparent plate structure is arranged on one side wall of the installation housing; the lens structure includes a group of lens columns, and a group of lens columns are stacked parallel to each other A plate body is formed, and the plate body is vertically arranged relative to the transparent plate structure, and the extension direction of each lens column has an oblique angle relative to the stacking direction of the lens columns. The lens structure is arranged perpendicular to the transparent plate structure, which is beneficial to save space, reduce product volume, facilitate processing and installation, and make the structure of the contact image sensor more compact. The lens column is inclined to the transparent plate structure, which can accept the reflected light at a specific angle, and can realize the detection of anti-counterfeiting marks such as holographic images and color-changing inks. At the same time, the lens structure of this structure has strong versatility and good replaceability.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

FIG. 1 shows a schematic cross-sectional structural view of a lens assembly of a contact image sensor according to an embodiment of the present invention; and

2 shows a schematic top view of a lens assembly of a contact image sensor according to an embodiment of the present invention;

FIG. 3 shows a schematic top view of a contact image sensor according to an embodiment of the present invention;

FIG. 4 shows a schematic cross-sectional structure diagram of a contact image sensor according to an embodiment of the present invention;

FIG. 5 shows a schematic top view of a contact image sensor according to an embodiment of the present invention;

FIG. 6 shows a schematic cross-sectional structure diagram of a contact image sensor according to a second embodiment of the present invention;

FIG. 7 shows a schematic top view of a contact image sensor according to a third embodiment of the present invention;

FIG. 8 shows a schematic cross-sectional structure diagram of a contact image sensor according to a third embodiment of the present invention.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Installation shell; 11. Transparent plate structure; 20. Lens structure; 21. Lens protective shell; 211. First half plate; 22. Lens column; 30. Light source; 41. Photosensitive part; 42. Substrate; 90. original manuscript.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Figures 1 to 8, according to an embodiment of the present utility model, the contact image sensor includes a mounting housing 10 and a lens structure 20, and a transparent plate structure 11 is arranged on a side wall of the mounting housing 10; the lens structure 20 includes A group of lens columns 22 are stacked parallel to each other to form a plate body, which is vertically arranged relative to the transparent plate structure 11 , and the extension direction of each lens column 22 has an oblique angle relative to the stacking direction of the lens columns 22 . The lens structure 20 is arranged perpendicular to the transparent plate structure 11, which is beneficial to save space, reduce product volume, facilitate processing and installation, and make the structure of the contact image sensor more compact. The lens column 22 is arranged obliquely to the transparent plate structure 11, which can receive reflected light at a specific angle, and can realize the detection of anti-counterfeiting marks such as holographic images and color-changing inks. At the same time, the lens structure 20 of this structure has strong versatility and good replaceability.

In this embodiment, the lens structure 20 also includes a lens protection case 21, the lens protection case 21 covers the outer periphery of the board formed by stacking the lens columns 22, the lens protection case 21 is arranged perpendicular to the transparent plate structure 11, and the lens columns 22 It is arranged in the lens protective case 21 , and the axis of the lens column 22 is inclined to the extension plane of the transparent plate structure 11 . In this way, the lens column 22 can be protected by the lens protection case 21 , and it is also convenient for the lens column 22 to be tilted, so as to ensure the accuracy of the tilt angle of the lens column 22 . In this embodiment, the lens column 22 is a self-focusing lens column 22 . The light reflected by the original document 90 can be collected by using the self-focusing lens column 22 for subsequent processing.

The lens protection case 21 includes a first half plate 211 and a second half plate. The first half-plate 211 is provided with a first half-groove, the second half-plate is provided with a second half-groove, the second half-plate cooperates with the first half-plate 211, and the first half-groove and the second half-groove form an installation space , the lens column 22 is fixedly placed in the installation space. The combination of the first half plate 211 and the second half plate forms the lens protection case 21 , which is easier to process and facilitates packing the lens column 22 into the lens protection case 21 .

In order to shield the light and ensure the working effect of the lens column 22, the outer periphery of the lens column 22 is wrapped with black resin glue, and the black resin glue is located between the outer periphery of the lens column 22 and the wall surface of the first half groove and the wall surface of the second half groove, so as to It is convenient to fix the lens column 22. In other embodiments, the lens column 22 may be fixed and light-shielded by other materials.

In this embodiment, a plurality of lens posts 22 are arranged in parallel in the lens protection case 21 . The included angle between each lens column 22 and the extension plane of the transparent plate structure 11 is not equal to 90°. Since the lens column 22 is inclined relative to the extension plane of the transparent plate structure 11, the lens column 22 can receive the reflected light from the original document 90 placed on the transparent plate structure 11 from a specific angle, through which the anti-counterfeit identification can be performed. Since the lens column 22 is fixed in the installation housing 10 in an existing manner, it has good versatility, occupies less space, and has a more compact structure.

The contact image sensor also includes a light source 30 disposed inside the mounting case 10 to emit light toward the transparent plate structure 11 . When the contact image sensor is in operation, the original 90 is covered on the transparent plate structure 11, the light emitted by the light source 30 is irradiated on the original 90 through the transparent plate structure 11, and the light reflected by the original 90 passes through the transparent plate structure 11, and then passes through the transparent plate structure 11 at a specific angle (this An angle is determined by the setting angle of the lens column 22 ) through the lens column 22 . Since the lens column 22 is inclined to the transparent plate structure 11, the lens column 22 can only receive reflected light corresponding to the angle at which it is set, so that the anti-counterfeit inspection of the holographic image and the color-changing ink can be realized.

The contact image sensor further includes a processing unit, which is arranged on the side of the lens structure 20 away from the transparent plate structure 11 , and receives and processes the reflected light processed by the lens structure 20 . The processing unit converts the reflected light into an electrical signal, and compares the converted electrical signal with a preset signal to obtain the authenticity of the detected holographic image or color-changing ink.

Specifically, the processing unit includes a photosensitive portion 41 and a substrate 42 . The photosensitive part 41 receives the reflected light and outputs an electrical signal according to the reflected light, and the photosensitive part 41 is disposed on the substrate 42 . The substrate 42 may be a PCB board, the photosensitive part 41 is a photosensitive integrated circuit, and the photosensitive part 41 is arranged in a straight line on the substrate 42 . The photosensitive integrated circuit receives the light from the lens structure 20 and converts the light signal into an electrical signal, and the processor receives the electrical signal and compares it with a preset signal to realize authenticity detection.

The light emitted by the light source 30 is irradiated onto the original 90 through the transparent plate structure 11. After refraction, scattering, and diffuse reflection, the light will be reflected back at various angles. Since the lens column 22 is placed at a specific angle, only a specific angle can be used. Only the reflected light at a certain angle can enter the lens column 22 and then be collected by the lens column 22 onto the photosensitive part 41 . The inclination angles of the self-focusing lens columns are different, and the spectral information collected and reflected by the anti-counterfeiting mark is different. The electrical signals converted from different spectral information are also different. After comparison, the purpose of identifying authenticity can be achieved. At the same time, it will not affect normal scanning.

According to the second embodiment of the present utility model, except for the lens structure 20, other structures of the contact image sensor are the same as those of the first embodiment. The lens structure 20 includes at least two groups of lens columns 22, which are respectively a first lens column group and a second lens column group. The direction of extension is different. Since the first lens column group and the second lens column group are set at different angles, the contact image sensor using this lens structure 20 can detect the same holographic image or color-changing ink at two different angles, and can also detect the same original Two different holographic images or color-changing inks on the 90 can be detected, which can not only improve the detection accuracy, but also improve the detection efficiency. This structure can be used when there are two or more anti-counterfeit marks on the original 90, so that multiple anti-counterfeit marks can be detected simultaneously, which not only saves space, but also greatly reduces the cost.

Similarly, multiple lens column groups with different angles can be arranged on the lens structure 20, which can be selected according to requirements.

The stacking direction of the plate body where the first lens column group is located is on the same straight line as the stacking direction of the plate body where the second lens column group is located. This is more conducive to improving the compactness of the structure.

According to the third embodiment of the present utility model, except for the number of light sources, other structures of the contact image sensor are the same as those of the first embodiment. The contact image sensor includes a light source group, the light source group is arranged in the installation housing 10, the light source group includes at least two light sources 30, wherein one light source 30 is arranged on one side of the lens structure 20, and the other light source 30 is arranged on the side of the lens structure 20 The other side. The contact image sensor is provided with a plurality of different light sources 30. Since the light sources 30 have different light emitting angles, the angles of reflected light from the original 90 are also different, and the signals formed after different lights enter the lens column 22 are also different. For the detection of holographic images or color-changing inks, the detection accuracy is higher, and multi-angle scanning can be realized at the same time.

During work, one of the light sources 30 and the other light source 30 emit light in sequence, and the original 90 is scanned twice. Although the inclination angle of the lens column 22 of the lens structure 20 is constant, due to the different light angles of the two light sources 30, the original 90 After the anti-counterfeiting marks such as holographic images on the reflector are reflected, the spectral information contained in the reflected light is also different, and these different information are collected by the lens column 22 and irradiated onto the photosensitive part 41 . The electrical signals converted from different spectral information are also different. After comparison, the purpose of identifying authenticity can be achieved.

In this embodiment, two light sources 30 with different incident angles relative to the original 90 are combined with an inclined self-focusing lens to meet the counterfeiting requirements of anti-counterfeiting marks such as holographic images. The advantage is that different information can be scanned with one product, so that the authenticity can be judged by comparison.

The contact image sensor includes an installation housing 10 , a substrate 42 , a photosensitive portion 41 disposed on the substrate 42 , and a lens structure 20 disposed above the photosensitive portion 41 . The difference between the contact image sensor and the conventional sensor is that the lens column 22 of the lens structure 20 is arranged obliquely to the transparent plate structure 11 of the installation housing 10 . The lens column 22 is obliquely fixed between the first half plate 211 and the second half plate. The first half plate 211 and the second half plate are FRP substrates. The self-focusing lens column is at a certain angle to the original 90 .

The self-focusing lens column is fixed between the FRP substrates at a certain inclination angle. The FRP substrate plays the role of support and protection. Black resin glue plays the role of bonding, sealing and shading. The self-focusing lens column can collect the light reflected back from the document 90 . Since the self-focusing lens column is fixed between the FRP substrates at a certain inclination angle, reflected light at a certain angle to the original document 90 can be collected. Since the reflected light of holographic images or color-changing inks at different angles has different holographic information or color information, the received reflected light at a specific angle is analyzed and compared with the preset light to identify color-changing inks and holographic images, etc. Anti-counterfeit mark.

As above, the inclination angle of the self-focusing lens column can be designed according to the angle required for color-changing ink and holographic image reading, and fixed in the installation housing 10 in a conventional way for use. In this way, on the basis of not changing the traditional structure, the contact image sensor has the function of angle scanning, can identify anti-counterfeit marks such as color-changing ink and holographic image, and also has good versatility and interchangeability. At the same time, the product structure is simplified, the mold structure is simplified, and the cost is reduced.

From the above description, it can be seen that the above-mentioned embodiments of the utility model have achieved the following technical effects: the use of the contact image sensor of the utility model can overcome the technical deficiencies in identifying anti-counterfeit marks such as color-changing inks and holographic images. The image sensor has a compact structure, is easy to use, has good versatility and interchangeability, can be used for multi-angle reading, and can identify anti-counterfeiting marks such as color-changing inks and holographic images.

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

Claims (11)

1. a contact-type image sensor, is characterized in that, comprising:

Holder housing (10), a sidewall of described holder housing (10) is provided with transparent panel structure (11);

Lens arrangement (20), described lens arrangement (20) comprises one group of lens post (22), described one group of lens post (22) stacked formation plate body parallel to each other, described plate body is vertically arranged relative to described transparent panel structure (11), and the stacked direction of the relatively described lens post (22) of bearing of trend of each described lens post (22) has angle of inclination.

2. contact-type image sensor according to claim 1, is characterized in that, described lens arrangement (20) also comprises lens containment vessel (21), and described lens containment vessel (21) is coated on the periphery of described plate body.

3. contact-type image sensor according to claim 1, it is characterized in that, described lens arrangement (20) comprises two groups of lens post (22), be respectively the first lens post group and the second lens post group, the bearing of trend of the described lens post (22) in described first lens post group is different from the bearing of trend of the described lens post (22) in described second lens post group.

4. contact-type image sensor according to claim 3, it is characterized in that, the stacked direction of the stacked direction of the described lens post (22) of described first lens post group and the described lens post (22) of described second lens post group is in same straight line.

5. contact-type image sensor according to any one of claim 1 to 4, it is characterized in that, described contact-type image sensor also comprises light source (30), described light source (30) is arranged in described holder housing (10), with luminous towards described transparent panel structure (11).

6. contact-type image sensor according to any one of claim 1 to 4, it is characterized in that, described contact-type image sensor also comprises light source group, described light source group is arranged in described holder housing (10), described light source group comprises at least two light sources (30), light source described in one of them (30) is arranged on the side of described lens arrangement (20), and light source described in another (30) is arranged on the opposite side of described lens arrangement (20).

7. contact-type image sensor according to claim 1, it is characterized in that, described contact-type image sensor also comprises processing unit, described processing unit is arranged on the side away from described transparent panel structure (11) of described lens arrangement (20), receive and process described lens arrangement (20) process after reverberation.

8. contact-type image sensor according to claim 7, is characterized in that, described processing unit comprises:

Photographic department (41), described photographic department (41) receives described reverberation and exports the signal of telecommunication according to described reverberation;

Substrate (42), described photographic department (41) is arranged on described substrate (42).

9. contact-type image sensor according to claim 8, is characterized in that, described photographic department (41) is light sensitive integrated devices, and described photographic department (41) is arranged in a straight line on described substrate (42).

10. contact-type image sensor according to claim 2, is characterized in that, described lens containment vessel (21) comprising:

The first half plates (211), described the first half plates (211) are provided with the first half grooves;

The second half plates, described the second half plates are provided with the second half grooves, described the second half plates and described the first half plates (211) positioned opposite, described the first half grooves and described the second half grooves surround installing space, and described lens post (22) fixed placement is in described installing space.

11. contact-type image sensors according to claim 1, is characterized in that, described lens post (22) is GRIN Lens post (22).