CN211184028U

CN211184028U - Contact image sensor

Info

Publication number: CN211184028U
Application number: CN202020170150.8U
Authority: CN
Inventors: 王家重; 王虎岩; 王凤秀; 曹慧俐
Original assignee: Weihai Hualing Opto Electronics Co Ltd
Current assignee: Weihai Hualing Opto Electronics Co Ltd
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2020-08-04
Anticipated expiration: 2030-02-14

Abstract

The utility model provides a contact image sensor, contact image sensor have predetermined scanning face, and scanning face is used for the scanning surface of treating of corresponding original manuscript, and contact image sensor includes: a light source unit for irradiating an original document; a first lens having an axis perpendicular to the scanning surface, the first lens being configured to collect reflected light of the light source unit reflected by the original; a second lens, the axis of which is arranged obliquely relative to the scanning surface, for collecting the reflected light reflected by the original from the light source; the first light sensing part is positioned on one side of the first lens, which is far away from the scanning surface, and the first light sensing part is used for receiving the reflected light collected by the first lens; the second light sensing part is positioned on one side of the second lens, which is far away from the scanning surface, and the second light sensing part is used for receiving the reflected light collected by the second lens. Therefore, the two light sensing parts can synchronously acquire the image information of the object from different angles, and the aim of keeping the image acquired by the smooth object clear and stable can be fulfilled.

Description

Contact image sensor

Technical Field

The utility model relates to an image sensor technical field particularly, relates to a contact image sensor.

Background

In a conventional contact image sensor, a lens and a light-sensing portion are provided, an axis of the lens is generally perpendicular to a surface to be scanned of an original to be detected, reflected light reflected by the original is collected by the lens, and the reflected light collected by the lens is received by the light-sensing portion, subjected to photoelectric conversion, and processed to obtain image information of the original.

When the contact type image sensor works, multi-angle information reading cannot be realized, and problems of over exposure, light reflection and the like easily occur to scanning detection of smooth objects, such as glass surface defect detection, so that the problems of unclear image scanning, image information omission and the like are caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a contact image sensor to contact image sensor among the solution prior art scans the unsatisfactory problem of detection effect to smooth object.

In order to solve the above problem, the utility model provides a contact image sensor, contact image sensor has predetermined scanning face, scanning face is used for corresponding treating the scanning surface of original manuscript, contact image sensor includes: a light source unit for irradiating the original document; a first lens having an axis perpendicular to the scanning surface, the first lens being configured to collect reflected light reflected by the original document from the light source; a second lens having an axis inclined with respect to the scanning surface, the second lens being configured to collect reflected light reflected by the original document and emitted from the light source unit; the first light sensing part is positioned on one side of the first lens, which is far away from the scanning surface, and is used for receiving the reflected light collected by the first lens; and the second light sensing part is positioned on one side of the second lens, which is deviated from the scanning surface, and is used for receiving the reflected light collected by the second lens.

Further, the contact image sensor further includes a frame, and the first lens, the second lens, the first light sensing section, and the second light sensing section are all disposed inside the frame; the light source unit is disposed inside the frame or outside the frame.

Further, the light source unit is disposed inside the frame, and the contact image sensor further includes: and a light transmitting plate provided inside the frame, the light transmitting plate being positioned on an irradiation path of the light source unit.

Further, the irradiation path of the light source unit is inclined with respect to the scanning surface, and both the light source unit and the transparent plate are located on a side of the first lens facing away from the second lens.

Further, the light source section is disposed outside the frame, and the contact image sensor further includes: a light blocking plate located between the first lens and the second lens.

Further, the light source section includes: the irradiation path of the first light source is obliquely arranged relative to the scanning surface, and the first light source is positioned on one side of the first lens, which is far away from the second lens.

Further, the light source unit further includes: and the irradiation path of the second light source is obliquely arranged relative to the scanning surface, and the second light source is positioned on one side of the second lens, which is far away from the first lens.

Further, an axis of the first lens passes through the first light sensing section, an axis of the second lens passes through the second light sensing section, and the contact image sensor further includes: the first substrate is provided with the first light sensing part, and the axis of the first lens is vertical to the surface of the first light sensing part; and the second substrate is provided with the second light sensing part, and the axis of the second lens is vertical to the surface of the second light sensing part.

Further, the contact image sensor further includes: and the processing part is used for receiving and processing the image information acquired by the first light sensing part and the second light sensing part.

Use the technical scheme of the utility model, a contact image sensor is provided, contact image sensor has predetermined scanning face, and scanning face is used for the scanning surface of treating of corresponding original manuscript, and contact image sensor includes: a light source unit for irradiating an original document; a first lens having an axis perpendicular to the scanning surface, the first lens being configured to collect reflected light of the light source unit reflected by the original; a second lens, the axis of which is arranged obliquely relative to the scanning surface, for collecting the reflected light reflected by the original from the light source; the first light sensing part is positioned on one side of the first lens, which is far away from the scanning surface, and is used for receiving the reflected light collected by the first lens; and the second light sensing part is positioned on one side of the second lens, which is deviated from the scanning surface, and is used for receiving the reflected light collected by the second lens. Through the scheme, the vertical lens and the inclined lens receive reflected light of the original at the same time, the two light sensing parts can synchronously acquire image information of the object from different angles, and then the image information is registered and synthesized, so that the aim of keeping clear and stable images acquired by smooth objects can be fulfilled.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a contact image sensor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a contact image sensor according to a second embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a contact image sensor according to a third embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a light source unit; 11. a first light source; 12. a second light source; 21. a first lens; 22. a second lens; 31. a first light sensing section; 32. a second light sensing section; 40. a frame; 51. a light-transmitting plate; 52. a visor; 61. a first substrate; 62. a second substrate; 70. an original document.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in the drawings, an embodiment of the present invention provides a contact image sensor, which has a preset scanning surface, the scanning surface is used for corresponding to a surface to be scanned of an original, and the contact image sensor includes: a light source section 10 for irradiating an original; a first lens 21, the axis of the first lens 21 being perpendicular to the scanning surface, the first lens 21 being configured to collect reflected light reflected by the original document and emitted by the light source unit 10; a second lens 22, the axis of the second lens 22 being inclined with respect to the scanning surface, the second lens 22 being configured to collect reflected light reflected by the original from the light source unit 10; a first light sensing part 31, which is positioned on one side of the first lens 21 departing from the scanning surface, and the first light sensing part 31 is used for receiving the reflected light collected by the first lens 21; the second light-sensing part 32 is located on the side of the second lens 22 away from the scanning surface, and the second light-sensing part 32 is used for receiving the reflected light collected by the second lens 22.

Use the technical scheme of the utility model, a contact image sensor is provided, contact image sensor has predetermined scanning face, and scanning face is used for corresponding the scanning surface of treating of original manuscript 70, and contact image sensor includes: a light source section 10 for irradiating the original 70; a first lens 21, an axis of the first lens 21 being perpendicular to the scanning surface, the first lens 21 being configured to collect reflected light of the light source unit 10 reflected by the original 70; a second lens 22, an axis of the second lens 22 being inclined with respect to the scanning surface, the second lens 22 being configured to collect the reflected light from the light source unit 10 reflected by the original 70; a first light sensing part 31, which is positioned on one side of the first lens 21 departing from the scanning surface, and the first light sensing part 31 is used for receiving the reflected light collected by the first lens 21; the second light-sensing part 32 is located on the side of the second lens 22 away from the scanning surface, and the second light-sensing part 32 is used for receiving the reflected light collected by the second lens 22. Through the scheme, the vertical lens and the inclined lens simultaneously receive the reflected light of the original 70, the two light sensing parts can synchronously acquire the image information of the object from different angles, and then the image information is registered and synthesized, so that the aim of keeping clear and stable images acquired by smooth objects can be fulfilled.

In the present embodiment, the contact image sensor further includes a frame 40, and the first lens 21, the second lens 22, the first light sensing section 31, and the second light sensing section 32 are all disposed inside the frame 40; the light source unit 10 is disposed inside the frame 40 or the light source unit 10 is disposed outside the frame 40. The arrangement and assembly of the various components is facilitated by the frame 40. The position of the light source unit 10 may be set as needed.

As shown in fig. 1, the light source unit 10 is disposed inside the frame 40, and the contact image sensor further includes: the transparent plate 51 is provided inside the frame 40, and the transparent plate 51 is positioned on the irradiation path of the light source unit 10. The light transmitting plate 51 can make the light emitted from the light source unit 10 relatively uniform. The light-transmitting plate 51 can protect the light source unit 10.

In this embodiment, the irradiation path of the light source unit 10 is inclined with respect to the scanning surface, and both the light source unit 10 and the transparent plate 51 are positioned on the side of the first lens 21 away from the second lens 22. This facilitates the light emitted from the light source section 10 to be reflected on the first lens 21 and the second lens 22 after being irradiated on the original. The original in this embodiment refers to an article to be scanned and detected.

The light source unit 10 may be disposed outside the frame 40, and the contact image sensor may further include: a light shielding plate 52, the light shielding plate 52 being located between the first lens 21 and the second lens 22. The contact type image sensor structure can meet the detection requirement that special light source angle illumination is needed. The light blocking plate 52 prevents the light emitted from the light source section 10 from directly entering the second lens 22 without being reflected by the original.

Specifically, as shown in fig. 2, the light source section 10 includes: the illumination path of the first light source 11 is arranged obliquely relative to the scanning surface, and the first light source 11 is positioned on the side of the first lens 21 away from the second lens 22. Through the arrangement, the detection requirement of special light source angle illumination can be met.

As shown in fig. 3, the light source unit 10 further includes: and a second light source 12, wherein the irradiation path of the second light source 12 is obliquely arranged relative to the scanning surface, and the second light source 12 is positioned on the side of the second lens 22, which is far away from the first lens 21. The contact type image sensor structure adopts a double-light-source mode, so that the detection requirement of special light source angle irradiation is met, the light intensity is further increased, and the output characteristic of a product is improved.

In this embodiment, the axis of the first lens 21 passes through the first light sensing section 31, the axis of the second lens 22 passes through the second light sensing section 32, and the contact image sensor further includes: a first substrate 61, wherein the first light sensing section 31 is disposed on the first substrate 61, and the axis of the first lens 21 is disposed perpendicular to the first light sensing section 31 mounted on the first substrate 61; the second substrate 62, the second light receiving section 32 is provided on the second substrate 62, and the axis of the second lens 22 is provided perpendicular to the second light receiving section 32 mounted on the second substrate 62. The arrangement of the first and second light-sensing

sections

31 and 32 is facilitated by the first and

second substrates

61 and 62. Specifically, the first light sensing section 31 and the second light sensing section 32 are each a photosensitive integrated circuit.

In this embodiment, the contact image sensor further includes: and a processing portion, to which the first light sensing portion 31 and the second light sensing portion 32 are electrically connected, for receiving and processing image information acquired by the first light sensing portion 31 and the second light sensing portion 32. The image information acquired by the first and second

light sensing sections

31 and 32 can be received and processed by the processing section to obtain a clear and accurate image.

The contact image sensor described above may employ the following image processing method, the image processing method including: the light source section 10 irradiates a surface to be scanned of an original; the first light sensing section 31 receives the reflected light collected by the first lens 21 and acquires image information; the second light sensing part 32 receives the reflected light collected by the second lens 22 and acquires image information; the image information read by the first light sensing section 31 and the image information read by the second light sensing section 32 are subjected to image registration processing. Through the scheme, the vertical lens and the inclined lens receive reflected light of the original at the same time, the two light sensing parts can synchronously acquire image information of the object from different angles, and then the image information is registered and synthesized, so that the aim of keeping clear and stable images acquired by smooth objects can be fulfilled.

Optionally, the image registration processing includes using a feature point-based method, completing matching between features of the two images by using the extracted features, and adjusting registration transformation of the two images to obtain a clear and stable image. Two images, i.e., image information read by the first light receiving section 31 and image information read by the second light receiving section 32.

In the above-mentioned scheme, the light that the light source sent passes through the light-transmitting plate, shines on the original manuscript of outside. The light in the text (or image) area on the original is reflected, refracted, scattered, etc., and the reflected light includes light rays with various angles, and the reflected light passes through the light-transmitting plate, is collected by the lens, and then is irradiated to the light-sensing area of the light-sensing part on the substrate. The light-sensing section is a circuit composed of a plurality of light-sensing areas and a drive circuit that photoelectrically converts light irradiated to each light-sensing area and outputs a signal. The received light is converted into an electric signal and then output through a driving circuit as image information, and the original moves continuously, so that the image information recorded on the original is continuously read.

The contact image sensor comprises a vertical lens and an inclined lens which work in a combined mode to form images, light emitted by a light source penetrates through a light-transmitting plate at a certain angle to irradiate an original, light irradiated on the original is reflected, and the reflected light enters the two lenses and is collected on a light sensing part. The vertical and inclined two groups of lenses simultaneously receive the reflected light of the original, and the light sensing part can read image information from different angles and register and synthesize the image information, so that the aims of scanning and detecting a smooth object and obtaining clear and stable images are fulfilled.

The utility model provides a contact image sensor of vertical and two sets of camera lens work of slope combination requires the mounted position, the installation angle of designing two sets of camera lenses according to the angle of smooth object scanning, and the mounted position, the installation angle of two sets of camera lenses are different, and the image information who gathers will be different. The utility model discloses a vertical and two sets of camera lens combination simultaneous working of slope among the contact image sensor, carry out image registration with the image information that the sensitization portion read from different angles and handle, adopt the method based on the characteristic point, utilize the characteristic of extraction to accomplish the matching between two image characteristics, adjust the registration transform of two images to realize the purpose that smooth object scan detected.

In the light source in the above embodiment, the light emitting angle and the mounting position of the light source are designed according to the angle requirement read by the detection object, for example, scratches on the surface of the detection glass, a smooth metal plate, etc., and the light emitting angle and the mounting position of the light source are different according to the difference of the scanning detection materials. Light source, the mountable is inside the frame, the light that the light source sent shines on vertical and two groups of lenses of slope through the original manuscript reflection, the sensitization portion reads optical information. The light source may also be mounted on the outside of the frame for special light source brightness requirements.

The vertical and inclined lenses of the contact image sensor work in a combined mode to form images simultaneously, detected image information is read from different angles according to the requirements of the material and the like of an object to be detected, the read image information is subjected to image registration processing, the registration transformation of two images is adjusted according to the detection requirements, and finally the synthesized image information is obtained, so that the requirements of scanning detection are met, the image information of the object to be detected is clear and stable, and the problems of light reflection and overexposure of a smooth object, which cause the image to be unclear, and the image information is not missed, are avoided.

The reflected light received by the vertical lens (i.e. the first lens) and the image information read by the light-sensing part can identify the main characteristics of the detected object. The reflected light received by the inclined lens (i.e. the second lens) and the image information read by the light-sensing part can identify the surface fine characteristics of the detected object. And carrying out image registration processing on the two read images, adjusting registration transformation of the two images, obtaining a composite picture according to the detection requirement, and simultaneously obtaining the overall characteristics of the detected object on one picture so as to realize the detection purpose.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A contact image sensor having a predetermined scanning surface for corresponding to a surface to be scanned of an original, comprising:

a light source unit (10) for irradiating the original document;

a first lens (21), the axis of the first lens (21) being disposed perpendicular to the scanning surface, the first lens (21) being configured to collect reflected light reflected by the original from the light source unit (10);

a second lens (22), wherein the axis of the second lens (22) is arranged obliquely relative to the scanning surface, and the second lens (22) is used for collecting the reflected light emitted by the light source part (10) and reflected by the original;

a first light sensing part (31) which is positioned on one side of the first lens (21) which is far away from the scanning surface, wherein the first light sensing part (31) is used for receiving the reflected light collected by the first lens (21);

and the second light sensing part (32) is positioned on one side of the second lens (22) departing from the scanning surface, and the second light sensing part (32) is used for receiving the reflected light collected by the second lens (22).

2. The contact image sensor according to claim 1, further comprising a frame (40), wherein the first lens (21), the second lens (22), the first light sensing section (31), and the second light sensing section (32) are all disposed inside the frame (40); the light source unit (10) is disposed inside the frame (40) or the light source unit (10) is disposed outside the frame (40).

3. The contact image sensor according to claim 2, wherein the light source section (10) is provided inside the frame (40), the contact image sensor further comprising:

and a light-transmitting plate (51) provided inside the frame (40), wherein the light-transmitting plate (51) is positioned on an irradiation path of the light source unit (10).

4. The contact image sensor according to claim 3, wherein an irradiation path of the light source section (10) is provided obliquely with respect to the scanning surface, and the light source section (10) and the light-transmitting plate (51) are each located on a side of the first lens (21) facing away from the second lens (22).

5. The contact image sensor according to claim 2, wherein the light source section (10) is provided outside the frame (40), the contact image sensor further comprising:

a light shield (52), the light shield (52) being located between the first lens (21) and the second lens (22).

6. The contact image sensor according to claim 5, wherein the light source section (10) comprises:

a first light source (11), the irradiation path of the first light source (11) being arranged obliquely to the scanning surface, the first light source (11) being located on the side of the first lens (21) facing away from the second lens (22).

7. The contact image sensor according to claim 6, wherein the light source section (10) further comprises:

a second light source (12), the irradiation path of the second light source (12) being arranged obliquely to the scanning surface, the second light source (12) being located on a side of the second lens (22) facing away from the first lens (21).

8. The contact image sensor according to claim 1, wherein an axis of the first lens (21) passes through the first light sensing section (31), and an axis of the second lens (22) passes through the second light sensing section (32), the contact image sensor further comprising:

a first substrate (61), the first light sensing section (31) being disposed on the first substrate (61), an axis of the first lens (21) being disposed perpendicularly with respect to a surface of the first light sensing section (31);

a second substrate (62), the second light sensing part (32) being disposed on the second substrate (62), an axis of the second lens (22) being disposed perpendicularly with respect to a surface of the second light sensing part (32).

9. The contact image sensor according to claim 1, further comprising:

and a processing portion, wherein the first light sensing portion (31) and the second light sensing portion (32) are electrically connected with the processing portion, and the processing portion is used for receiving and processing the image information acquired by the first light sensing portion (31) and the second light sensing portion (32).