CN209002052U - Image read-out - Google Patents
Image read-out Download PDFInfo
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- CN209002052U CN209002052U CN201821932374.7U CN201821932374U CN209002052U CN 209002052 U CN209002052 U CN 209002052U CN 201821932374 U CN201821932374 U CN 201821932374U CN 209002052 U CN209002052 U CN 209002052U
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- image
- read
- light source
- photoelectric conversion
- conversion chip
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Abstract
The utility model provides a kind of image read-out, comprising: light source assembly, light source assembly include light source；Image-forming assembly, image-forming assembly include photoelectric conversion chip and pinhole imaging system plate, and the setting of pinhole imaging system plate is being read between object and photoelectric conversion chip, and the light of light source is irradiated to the light for being read object by entering photoelectric conversion chip after pinhole imaging system plate.The problem of not being adjustable the technical solution of the utility model effectively solves imaging size in the prior art.
Description
Technical field
The utility model relates to the technical fields of image read-out, in particular to a kind of image read-out.
Background technique
As shown in Figure 1, existing contact-type image sensor (CIS), is widely used in image scanning, information identification etc. is each
A field, contact-type image sensor are a kind of linear imaging sensors.It is mainly by linear selfoc lens array, linear sense
The composition such as optical chip array 1, framework 2, light source 3.In existing contact-type image sensor, selfoc lens array with it is photosensitive
Chip array is corresponding arrangement, this two parts is the core component of contact-type image sensor, accounts for entire material cost very
Big a part.Meanwhile the outer dimension of contact-type image sensor, especially height dimension, substantially by self-focusing lens
What focal length determined, because the original copy and sensitive chip to be scanned, which must be located in two focuses of self-focusing lens, to be obtained
To ideal image, therefore, the height dimension of contact-type image sensor cannot adjust as requested, this just make its application by
Limitation.
Utility model content
The main purpose of the utility model is to provide a kind of image read-outs, big to solve imaging in the prior art
Small the problem of not being adjustable.
To achieve the goals above, one aspect according to the present utility model provides a kind of image read-out, packet
Include: light source assembly, light source assembly include light source；Image-forming assembly, image-forming assembly include photoelectric conversion chip and pinhole imaging system plate, small
The setting of borescopic imaging plate is being read between object and photoelectric conversion chip, the light of light source be irradiated to be read the light of object pass through it is small
Enter photoelectric conversion chip after borescopic imaging plate.
Further, image read-out further includes shell, and photoelectric conversion chip and pinhole imaging system plate are respectively positioned in shell,
Pinhole imaging system plate is an integral molding structure with shell or pinhole imaging system plate is mounted in shell.
Further, image-forming assembly further includes circuit board, and photoelectric conversion chip is arranged on circuit boards.
Further, circuit board is fixed on shell.
Further, a hole or multiple holes are provided on pinhole imaging system plate.
Further, hole is w to the distance for being read object, and the distance in hole to photoelectric conversion chip is that f, w and f should meet such as
Lower condition: w/f > 1 or w/f < 1.
Further, photoelectric conversion chip is one or more.
Further, light source assembly and image-forming assembly are located at the same side for being read object or light source assembly and imaging group
Part is located at the two sides for being read object.
Further, light source assembly further includes columned light guide, and light source is located at one end of light guide.
Further, light source assembly further includes reflecting part, and reflecting part is located at the light out of the separate light guide of light guide
Side.
Using the technical solution of the utility model, light is irradiated to and is read on object by light source assembly, is read object for light
Line enters photoelectric conversion chip by pinhole imaging system plate, in this way by instrumentality away from can change with image distance be read object at
Picture, and then photoelectric conversion chip is reasonably laid out.The technical solution of the utility model effectively solves the prior arts
In imaging size the problem of not being adjustable.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical
Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.
In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of the image read-out of the prior art；
Fig. 2 shows the structural schematic diagrams of the embodiment of image read-out according to the present utility model；
Fig. 3 shows the overall structure diagram of the image read-out of Fig. 2；
Fig. 4 shows the schematic cross-sectional view of the image read-out of Fig. 2；
The perspective that Fig. 5 shows the image read-out of Fig. 2 is read the schematic cross-sectional view of object；
Fig. 6 shows the schematic cross-sectional view that object is read by reflection light reading of the image read-out of Fig. 2；
Fig. 7 shows the theory structure schematic diagram of the pinhole imaging system of the image read-out of Fig. 2；And
Fig. 8 shows the schematic illustration of the image read-out of Fig. 2.
Wherein, the above drawings include the following reference numerals:
1, linear sensitive chip array；2, framework；3, light source；10, light source assembly；20, image-forming assembly；21, photoelectric conversion
Chip；22, pinhole imaging system plate；23, circuit board；30, shell；100, it is read object.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Fig. 2 to Fig. 8, the image read-out of the present embodiment includes: light source assembly 10 and image-forming assembly 20.Light source
Component 10 includes light source.Image-forming assembly 20 includes photoelectric conversion chip 21 and pinhole imaging system plate 22, and the setting of pinhole imaging system plate 22 exists
It is read between object 100 and photoelectric conversion chip 21, the light of light source, which is irradiated to, to be read the light of object 100 and pass through pinhole imaging system
Enter photoelectric conversion chip 21 after plate 22.
Using the technical solution of the utility model, light is irradiated to by light source assembly 10 to be read on object 100, is read object
Light is entered photoelectric conversion chip 21 by pinhole imaging system plate 22 by 100, passes through instrumentality in this way away from can change with image distance
It is read the imaging of object, and then photoelectric conversion chip is reasonably laid out.The technical solution of the present embodiment efficiently solves
The problem of imaging size in the prior art is not adjustable.
As shown in Fig. 2 to Fig. 8, in the technical scheme of this embodiment, image read-out further includes shell 30, and photoelectricity turns
It changes chip 21 and pinhole imaging system plate 22 is respectively positioned in shell 30, pinhole imaging system plate 22 and shell 30 are an integral molding structure (as schemed
2, shown in Fig. 3, Fig. 5, Fig. 6 and Fig. 7).Above structure processing cost is lower.Alternatively, pinhole imaging system plate 22 is mounted in shell 30
(as shown in Figure 4).Above structure maintenance cost is lower, for example, can only need to change pinhole imaging system plate 22 as needed.On
It states two ways and can satisfy the needs of image read-out.It should be noted that pinhole imaging system plate 22 by fastener with
Shell 30 is connected.
As shown in figure 3, in the technical scheme of this embodiment, image-forming assembly 20 further includes circuit board 23, photoelectric conversion core
Piece 21 is arranged on circuit board 23.Above structure is compact, occupies small volume.Specifically, circuit board 23 is fixed on shell 30.
As shown in Figures 2 and 3, in the technical scheme of this embodiment, a hole or more is provided on pinhole imaging system plate 22
A hole.Above structure, which can according to need, to be selected, and the structure in multiple holes can expand the area of imaging, it is however generally that work as quilt
Using that can use porous pinhole imaging system plate 22 when reading 100 area of object is larger, certainly, pinhole imaging system plate 22 may be more
A, one or more hole can be set in each pinhole imaging system plate 22.
As shown in Fig. 5 to Fig. 8, in the technical scheme of this embodiment, hole to the distance for being read object 100 is w, hole to light
The distance of electric conversion chip 21 is that f, w and f should meet following condition: w/f > 1.Biggish image can be obtained in this way, it is such
Image is easy observation.W and f also can satisfy: w/f < 1.Such structure can save the quantity of photoelectric conversion chip 21.Such as
Shown in Fig. 3, passing through pinhole imaging system by cd is d ' c ', and the length of cd is h, and the length of d ' c ' is that m, m and h meet pinhole imaging system
Principle.Specifically, in fig. 8, give d point and c point by can be reached after aperture a point, e point and x point by after aperture all
B point can be reached.
As shown in Figures 2 to 4, in the technical scheme of this embodiment, photoelectric conversion chip 21 is one or more.According to
Photoelectric conversion chip 21 is needed to can choose one or more.Wherein, when w/f < 1, it is possible to reduce photoelectric conversion chip 21
Quantity.
As shown in fig. 6, light source assembly 10 and image-forming assembly 20 are located at the same side for being read object 100.As shown in figure 5, light
Source component 10 and image-forming assembly 20 are located at the two sides for being read object 100.Above two different embodiment can according to need
It is selected.
As shown in figure 5, in the technical scheme of this embodiment, light source assembly 10 further includes columned light guide, light source
Positioned at one end of light guide.The setting of light guide can expand the emittance area of light source.
As shown in figure 5, in the technical scheme of this embodiment, light source assembly 10 further includes reflecting part, reflecting part position
In the separate light emission side of light guide.The intensity of emergent light can be enhanced in this way.
The imaging sensor of the application is the principle using pinhole imaging system, with array of orifices replace selfoc lens array come
The linear scan for carrying out image, to reach save the cost, using more flexible and convenient purpose.Meanwhile existing contact figure
As sensor is imaged using self-focusing lens, scanned original copy and photoelectric conversion chip must be positioned at self-focusing lens
Focal position, it follows that the height dimension of existing contact-type image sensor is determined by the focal length of self-focusing lens substantially, no
It can arbitrarily change, otherwise you can't get clearly images.And the application utilizes pinhole imaging system principle, clarity and aperture
DiameterAnd the ratio of object distance and image distance is related, and it is unrelated with the actual size of image distance and object distance, be illustrated in figure 8 aperture at
The schematic diagram of the clarity (resolution ratio) of picture, wherein the distance between ex is that the light of scanned reflection can be irradiated by aperture
Extent length on to photoelectric conversion chip, with object distance w, image distance f and hole diameterRelationship such as following equation:The diameter in hole is smaller it can be seen from formula, and clarity is higher, and the ratio of object distance and image distance is smaller, clearly
It spends higher.And diameter play a decisive role or aperture.Therefore, the application imaging sensor can according to need increase or subtract
Low height size, easy to use and flexible.
The photoelectric conversion chip of Fig. 3 is along the length direction linear array of circuit board, and array of orifices is along shell (framework) length
Dimension linear arrangement, the array of orifices are located at the surface of photoelectric conversion chip, also, each aperture and a sensitive chip one
One is corresponding, and small hole center is overlapped with the center of sensitive chip.The light that light source issues is by being radiated at and being read object after light-transmitting plate
On 100, it is read the reflection of object 100, housing direction is returned in diffusing reflection, according to the straightline propagation principle of light, for aperture, quilt
The light for reading the original copy reflection on object (original copy) within the scope of only cd could be radiated in photoelectric conversion chip, root by aperture
According to the principle of pinhole imaging system, the image information in two point range of cd can form the picture of a handstand in photoelectric conversion chip, and
Since the photoelectric conversion chip is linear sensitive chip, so, the linear original copy information c ' d ' of an obtained only handstand, according to
Secondary to analogize, the corresponding photoelectric conversion chip of each aperture can obtain one section of linear original copy information, be handled by subsequent software, will
The information that each chip obtains is overturn, then end to end, can obtain a whole linear original copy letter of c to d on original copy
Breath.Under the drive of external driving mechanism, the linear transducer of original copy or the application are in a certain direction with certain speed phase
To movement.
Aperture to original copy distance w (object distance) and aperture to photoelectric conversion chip distance f (image distance) ratio w/f > 1.
Specifically, for w/f=2, as shown in figure 3, according to the formula of similar triangles, it can be deduced that, it is scanned as w/f=2
The length h of object is equal to 2 times of the length m of picture, and therefore, the quantity of photoelectric conversion chip is compared with existing contact-type image sensor
Half can be reduced because existing contact-type image sensor is equal proportion linear scan, imaging be it is upright, etc. sizes
Picture, the length of photoelectric conversion chip used has to be larger than the length equal to scan manuscript.Therefore, the application is by saving photoelectricity
The quantity of conversion chip can greatly reduce cost.
Array of orifices is dispensed directly onto framework, is an entirety with framework.The advantages of which, is incited somebody to action by mold
Array of orifices and framework one-pass molding, precision is high, reduces the error of array of orifices Yu photoelectric conversion chip relative position, aligns
Accurately, easy to operate.
Pinhole imaging system plate (orifice plate) is separately provided in Fig. 4, array of orifices linearly arranges on orifice plate.Orifice plate is installed on
On the installation base of framework.It, can be by setting in order to be aligned the array of orifices center of orifice plate with the center of photoelectric conversion chip
Set the installation site that the location hole on positioning column and orifice plate in framework carrys out restriction orifice relative to framework.
Structure is characterized in Fig. 4: framework and array of orifices (orifice plate) be it is split type, orifice plate and framework can pass through glue
The modes such as bonding, screw fixation link together.The advantages of embodiment, is: the position by changing orifice plate, thus it is possible to vary
The clarity of imaging, the size and ratio for changing imaging；By change hole spacing and with the relative position of original copy, thus it is possible to vary
The size of imaging, so as to change the number of photoelectric conversion chip used.And the structure of framework does not change, and can use one
Mold production, only need to change orifice plate, therefore, can greatly save cost, easy to operate.
External light source is used instead in Fig. 5 to provide transmitted light source.Which is applicable to read the image of homology figure
Reading device, the reading of transmission image and existing contact-type image sensor are essentially identical, only using the linear of the application
Imaging sensor.
In Fig. 6 and Fig. 7 aperture only one, and photoelectric conversion chip can be it is one or several.The feature of which exists
In, the ratio w/f < 1 of the distance w (object distance) and aperture to photoelectric conversion chip distance f (image distance) of aperture to original copy, therefore
It can be concluded that the ratio of the length m of the length h and picture of object, h/m < 1.The picture can be stood upside down by the embodiment, amplified.With
For m/h=2, as being exaggerated twice than original copy.There are many small photosensitive windows, these windows in 21 upper surface of photoelectric conversion chip
The length direction of opening's edge chip linearly arranges, and the optical signal that each window obtains will be converted to a pixel of image
Point, therefore, the resolution level of photoelectric conversion chip just determine by the quantity of photosensitive window in unit length, therefore, when being adopted
After photoelectric conversion chip determines, resolution ratio is also determined.When the length of picture is 2 times of original copy, as in photoelectric conversion
The quantity of occupied photosensitive window is exactly 2 times for utilizing existing contact-type image sensor on chip, so, utilize we
Formula can be improved the resolution ratio of scan image.The raising multiple of resolution ratio, as needed, the ratio for changing image distance and object distance is
It can.The method small volume can be applied to portable scanning device, such as wand, can either have existing wand
Scanning, store function, moreover it is possible to there is amplification, propose high-resolution function.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of image read-out characterized by comprising
Light source assembly (10), the light source assembly (10) includes light source；
Image-forming assembly (20), the image-forming assembly (20) include photoelectric conversion chip (21) and pinhole imaging system plate (22), described small
Borescopic imaging plate (22) setting is being read between object (100) and the photoelectric conversion chip (21), the light irradiation of the light source
The photoelectric conversion chip (21) are entered afterwards by the pinhole imaging system plate (22) to the light for being read object (100).
2. image read-out according to claim 1, which is characterized in that described image reading device further includes shell
(30), the photoelectric conversion chip (21) and the pinhole imaging system plate (22) are respectively positioned in the shell (30), the aperture at
Picture plate (22) is an integral molding structure with the shell (30) or the pinhole imaging system plate (22) is mounted on the shell (30)
It is interior.
3. image read-out according to claim 2, which is characterized in that the image-forming assembly (20) further includes circuit board
(23), the photoelectric conversion chip (21) is arranged on the circuit board (23).
4. image read-out according to claim 3, which is characterized in that the circuit board (23) is fixed on the shell
(30) on.
5. image read-out according to claim 1, which is characterized in that be provided with one on the pinhole imaging system plate (22)
A hole or multiple holes.
6. image read-out according to claim 5, which is characterized in that the hole is read object (100) described in
Distance is w, and the distance in the hole to the photoelectric conversion chip (21) is that f, the w and the f should meet following condition:
W/f > 1 or w/f < 1.
7. image read-out according to claim 1, which is characterized in that the photoelectric conversion chip (21) be one or
It is multiple.
8. image read-out according to claim 1, which is characterized in that the light source assembly (10) and the imaging group
Part (20) is located at described the same side for being read object (100) or the light source assembly (10) and the image-forming assembly (20) position
In the two sides for being read object (100).
9. image read-out according to any one of claim 1 to 8, which is characterized in that the light source assembly (10)
It further include columned light guide, the light source is located at one end of the light guide.
10. image read-out according to claim 9, which is characterized in that the light source assembly (10) further includes reflective
Component, the reflecting part are located at the light emission side far from the light guide of the light guide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821932374.7U CN209002052U (en) | 2018-11-22 | 2018-11-22 | Image read-out |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821932374.7U CN209002052U (en) | 2018-11-22 | 2018-11-22 | Image read-out |
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| CN209002052U true CN209002052U (en) | 2019-06-18 |
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| CN201821932374.7U Active CN209002052U (en) | 2018-11-22 | 2018-11-22 | Image read-out |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274854A (en) * | 2018-11-22 | 2019-01-25 | 威海华菱光电股份有限公司 | Image read-out |
| CN109274854B (en) * | 2018-11-22 | 2024-05-10 | 威海华菱光电股份有限公司 | Image reading apparatus |
-
2018
- 2018-11-22 CN CN201821932374.7U patent/CN209002052U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274854A (en) * | 2018-11-22 | 2019-01-25 | 威海华菱光电股份有限公司 | Image read-out |
| CN109274854B (en) * | 2018-11-22 | 2024-05-10 | 威海华菱光电股份有限公司 | Image reading apparatus |
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