CN219497117U

CN219497117U - Optically variable ink detection module structure

Info

Publication number: CN219497117U
Application number: CN202320261837.6U
Authority: CN
Inventors: 杨涛维; 宋子杰; 叶爱龙
Original assignee: Lite On Semiconductor Wuxi Co Ltd
Current assignee: Lite On Semiconductor Wuxi Co Ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-08-08
Anticipated expiration: 2033-02-20

Abstract

The utility model discloses a light-variable ink detection module structure, and belongs to the technical field of light-variable ink detection. The optically variable ink detection module structure comprises a module shell, wherein an optical sensing module is arranged in the module shell, an optical sensing substrate is arranged at the bottom of the optical sensing module, and the optical sensing module is connected with the optical sensing substrate in a bonding mode. In order to solve the problems that the traditional optically variable ink detection needs two groups of light sensors with different angles, and an additional group of image processing rear end is needed, the cost is higher, and the assembly structure is difficult to design, the optically variable ink on the banknote is realized by improving the coaxial light concept of a microscope in the prior art and then combining the structure of a CIS after improving the optical structure of the optically variable ink, and the detection device comprises a linear light source with an incidence angle of 30-60 degrees and a linear coaxial light source module, so that the characteristics of optically variable ink can be identified while the image is scanned, and the additional group of light sensors with different angles are not needed.

Description

Optically variable ink detection module structure

Technical Field

The utility model relates to the technical field of optically variable ink detection, in particular to an optically variable ink detection module structure.

Background

Optically variable inks refer to inks that are subjected to different illumination angles from a light source or sensor receiving angles to obtain different color image features.

In order to identify optically variable ink, the currently marketed optically variable ink detection device generally adopts a structure with two groups of different angle sensors, wherein one light source has a reflection angle of 30-60 degrees and the other light source has an angle close to 90 degrees;

the defects are that:

1) Two sets of light sensors at different angles are required;

2) The cost is high;

3) The equipment is large in size;

4) The assembly structure is difficult to design;

5) An additional set of image processing back ends is needed;

therefore, the existing demand is not satisfied, and an optically variable ink detection module structure is proposed for this.

Disclosure of Invention

The utility model aims to provide a light-changing ink detection module structure, which is used for detecting light-changing ink on a banknote, and the light-changing ink detection module structure is characterized in that the light-changing ink detection module structure is used for improving the coaxial light concept of a microscope in the prior art and then combining a CIS structure, and the detection device comprises a linear light source with an incidence angle of 30-60 degrees and a linear coaxial light source module, so that the characteristics of the light-changing ink can be identified while an image is scanned, and the problems in the prior art can be solved without additionally adding another group of light sensors with different angles.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a optically variable printing ink detection module structure, includes the module casing, the inside of module casing is provided with the photo-sensing module, and the bottom of photo-sensing module is provided with the photo-sensing base plate, the photo-sensing module is connected with the photo-sensing base plate laminating, the outside of module casing one end is provided with high transparent glass, and high transparent glass passes through the draw-in groove with the module casing and is connected, the top of photo-sensing module is provided with lenticular lens, and lenticular lens's one end extends to half the below of reflecting half lens, half reflecting half lens sets up to inclined structure.

Preferably, one side of the half-reflecting half-lens is provided with a light-emitting cover, the light-emitting cover is connected with the module shell through a clamping groove, the other side of the half-reflecting half-lens is provided with a linear light source, and the irradiation angle of the linear light source is set to be 30-60 degrees.

Preferably, the outer surface of the light-emitting cover is provided with a composite film prism sheet, the inside of the light-emitting cover is provided with an array type LED, and one side of the array type LED is provided with an LED substrate.

Preferably, the array type LED and the semi-reflecting semi-transparent mirror are arranged to be reflected at right angles.

Preferably, paper money is arranged on the outer side of the high-permeability glass.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model relates to optically variable ink on bank note, which combines the microscope coaxial optical concept of the prior art with the CIS structure after improving the optical structure, and the detection device comprises a linear light source with an incidence angle of 30-60 degrees and a linear coaxial optical light source module, so that the characteristics of optically variable ink can be identified while scanning images, and another group of optical sensors with different angles are not needed to be additionally added;

2. the utility model adds a group of linear coaxial light sources in the contact sensor, and configures the general linear light sources at the same time, so that the contact sensor has two different light paths, namely a first light path and a second light path, wherein the first light path is a path displayed by a dotted line, the second light path is a path displayed by a solid line, two different scanning images can be obtained by the different light paths, the incident light of the general light source obtains the scanning image through the second light path, the light variation area of the scanning image is black, the scanning incident light of the coaxial light source obtains the scanning image through the first light path, the light variation area of the scanning image is bright, and the contrast calculation is carried out by using the two groups of different scanning images, so that whether the block is the light variation ink or not can be judged, and the fake identification function is achieved;

3. according to the utility model, the 30-60-degree linear light source is arranged on the left side of the semi-reflective semi-transparent lens, the array LED is arranged on the right side of the semi-reflective semi-transparent lens, and the light reflecting cavity is formed in the light emitting cover, so that stray light in the light emitting direction can be reduced, meanwhile, due to the characteristic of the prism sheet, the stray light can return to the light reflecting cavity to reflect light until passing through the light emitting opening again, and the light loss rate can be reduced.

Drawings

FIG. 1 is a block diagram of a detection optically variable ink module according to the present utility model;

FIG. 2 is a schematic diagram of the optical path of the scanned image in FIG. 1;

FIG. 3 is a linear coaxial optical block diagram of the present utility model;

FIG. 4 is a scanned image of the 30-60 illuminant-optically variable ink of FIG. 2;

fig. 5 is a linear coaxial light source-optically variable ink scanned image of fig. 2.

In the figure: 1. a module housing; 2. high-permeability glass; 3. a half-mirror half-lens; 4. a light sensing module; 5. a lenticular lens; 6. a light-emitting cover; 7. a linear light source; 8. paper money; 401. a light sensing substrate; 601. a prism sheet of composite film; 602. an LED substrate; 603. an array type LED.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, an embodiment of the present utility model is provided: the optically variable ink detection module structure comprises a module shell 1, wherein an optical sensing module 4 is arranged in the module shell 1, an optical sensing substrate 401 is arranged at the bottom of the optical sensing module 4, the optical sensing module 4 is in joint connection with the optical sensing substrate 401, high-transmittance glass 2 is arranged on the outer side of one end of the module shell 1, the high-transmittance glass 2 is connected with the module shell 1 through a clamping groove, a cylindrical lens 5 is arranged above the optical sensing module 4, one end of the cylindrical lens 5 extends to the lower side of a half-reflecting half-mirror 3, the half-reflecting half-mirror 3 is in an inclined structure, a light-emitting cover 6 is arranged on one side of the half-reflecting half-mirror 3, the light-emitting cover 6 is connected with the module shell 1 through the clamping groove, a linear light source 7 is arranged on the other side of the half-reflecting half-mirror 3, the irradiation angle of the linear light source 7 is 30-60 DEG, a composite film lens 601 is arranged on the outer surface of the light-emitting cover 6, an array LED603 is arranged in the inner side of the light-emitting cover 6, an LED substrate 602 is arranged on one side of the array LED603, a right angle of the array LED603 is arranged between the array LED603 and the half-reflecting half-mirror 3, and the outer side of the high-reflecting half-reflecting glass 2 is arranged on the outer side 8;

the linear light source 7 with the angle of 30-60 degrees is arranged on the left side of the semi-reflection semi-lens 3, the array LED603 is arranged on the right side of the semi-reflection mirror 3, and a light reflection cavity is formed in the light outlet cover 6, so that stray light in the light outlet direction can be reduced, meanwhile, due to the characteristics of the lens, the stray light can return to the light reflection cavity to carry out light reflection until passing through the light outlet again, and the light loss rate can be reduced;

the inclination angle of the semi-reflection semi-transparent mirror 3 is 45 degrees, the array type LED603 is vertically arranged, and after light rays are emitted from the light source, the light rays are refracted by the semi-reflection semi-transparent mirror 3 and then vertically upwards and vertically to the paper money 8, so that the coaxial principle is achieved;

the front of the array LED603 is provided with a diffusion sheet, which aims to homogenize the light emitted by the array LED603 and reduce the problem of poor uniformity of the output waveform caused by the lamp bead effect, and the upper part is provided with a light shielding sheet for shielding the stray light emitted by the array light source to avoid influencing the scanned image, wherein the LED light source can select white light, R light or RGB light source.

Referring to fig. 2-5, a group of linear coaxial light sources is added in the touch sensor, and a general linear light source is configured at the same time, so that there are two different light paths, namely a first light path and a second light path, in the touch sensor, the first light path is a path shown by a dotted line, the second light path is a path shown by a solid line, two different scanned images can be obtained by the different light paths, the incident light of the general light source obtains the scanned image through the second light path, and the light variation area of the scanned image is black; the scanned incident light of the coaxial light source is subjected to light path I to obtain a scanned image, the optically variable area of the scanned image is bright, and two groups of different scanned images are used for comparison calculation, so that whether the block is optically variable ink or not can be judged, and the fake identification function is achieved;

referring to fig. 3, the light emitted by the linear coaxial light structure passes through the diffusion sheet and then enters the half-reflecting half-lens, and then is separated from the light perpendicular to the surface of the scanned object and reflected by the surface of the scanned object, and the reflected light and the optical sensor are located on the same axis.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Optically variable ink detection module structure, including module casing (1), its characterized in that: the inside of module casing (1) is provided with light sensing module (4), and the bottom of light sensing module (4) is provided with light sensing base plate (401), light sensing module (4) are connected with light sensing base plate (401) laminating, the outside of module casing (1) one end is provided with high transparent glass (2), and high transparent glass (2) are connected through the draw-in groove with module casing (1), the top of light sensing module (4) is provided with lenticular lens (5), and the one end of lenticular lens (5) extends to the below of half reflecting half mirror (3), half reflecting half mirror (3) set up to tilting structure.

2. The optically variable ink detection module structure according to claim 1, wherein: one side of the half-reflecting mirror (3) is provided with a light-emitting cover (6), the light-emitting cover (6) is connected with the module shell (1) through a clamping groove, the other side of the half-reflecting mirror (3) is provided with a linear light source (7), and the irradiation angle of the linear light source (7) is set to be 30-60 degrees.

3. The optically variable ink detection module structure according to claim 2, wherein: the outer surface of the light-emitting cover (6) is provided with a composite film prism sheet (601), an array type LED (603) is arranged in the light-emitting cover (6), and an LED substrate (602) is arranged on one side of the array type LED (603).

4. A optically variable ink detection module structure according to claim 3, wherein: the array type LED (603) and the semi-reflecting semi-transparent mirror (3) are arranged to be reflected at right angles.

5. The optically variable ink detection module structure according to claim 1, wherein: paper money (8) is arranged on the outer side of the high-permeability glass (2).