CN106066981B - Scanning head - Google Patents
Scanning head Download PDFInfo
- Publication number
- CN106066981B CN106066981B CN201610381577.0A CN201610381577A CN106066981B CN 106066981 B CN106066981 B CN 106066981B CN 201610381577 A CN201610381577 A CN 201610381577A CN 106066981 B CN106066981 B CN 106066981B
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- Prior art keywords
- optical filter
- filter
- scanning head
- light source
- imaging device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10831—Arrangement of optical elements, e.g. lenses, mirrors, prisms
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10712—Fixed beam scanning
- G06K7/10722—Photodetector array or CCD scanning
- G06K7/10732—Light sources
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Artificial Intelligence (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Optical Filters (AREA)
- Microscoopes, Condenser (AREA)
- Endoscopes (AREA)
Abstract
The present invention provides a kind of scanning heads, including：One imaging device, the imaging device are used to be imaged scanned target；The light area of one light source, the light source is located in the imaging region of the imaging probe, with auxiliary positioning scanned target；The light source includes the first optical filter, and first optical filter is for filtering to the luminous of light source；The imaging device includes the second optical filter, and the scanned target is imaged by second optical filter in the imaging device；First optical filter and the second optical filter are set as：It can be ended in second optical filter by the light of first optical filter.
Description
Technical field
The present invention relates to field of mobile terminals more particularly to a kind of scanning heads.
Background technology
Scanning head is a kind of terminal device for scanning fixed image.Scanned image for example can be bar code,
Quick Response Code or other image informations that can be read.And the principle scanned can also be infrared light scanning or visible light
Imaging.The Quick Response Code or bar code of plane are scanned using the camera of a visible light, be in the prior art it is a kind of very
Common scene.And under this scanning scene, how scanned Quick Response Code or bar code be placed on camera just
Center, be to need a problem solving.The user for being usually in the prior art end of scan passes through observation scanning
Screen in terminal determines that end of scan and scanned figure are in suitable relative position.The shortcomings that this way, is
Alignment needs longer time, and scanned image is needed to be in lower position, is convenient for user's hand-hold scanning terminal
And carry out viewing screen above end of scan.
A kind of method solving the problems, such as this is to form one using visible light source transmitter and beam condensing unit in the prior art
The range of exposures of beam fill-in light, the fill-in light is located within the imaging region of the imaging probe, to make user straight
It connects, accurately scanned object is directly placed within imaging region.The disadvantages of this method is that fill-in light can be illuminated
Region in formed a flare, to influence scanned object imaging clarity.Therefore, how fill-in light pair is avoided
The influence of scanned object imaging, is prior art urgent problem to be solved.
Invention content
The technical problem to be solved by the invention is to provide a kind of scanning heads, fill-in light can be avoided to scanned
The influence of body imaging.
To solve the above-mentioned problems, the present invention provides a kind of scanning heads, including：One imaging device, the imaging dress
It sets for being imaged to scanned target；The light area of one light source, the light source is located in the imaging region of the imaging probe,
With auxiliary positioning scanned target；The light source include the first optical filter, first optical filter be used for light source shine into
Row filters；The imaging device includes the second optical filter, and the scanned target is by second optical filter in the imaging
Imaging in device；First optical filter and the second optical filter are set as：It can be by the light of first optical filter in institute
The second optical filter is stated to end.
Optionally, first optical filter and the second optical filter are bandpass filter, and the two has different middle cardiac waves
Long, the centre wavelength difference range of first optical filter and the second optical filter is more than 50nm.It is preferred that the light source is white light light
The centre wavelength range in source, first optical filter is 400nm-450nm, and the centre wavelength range of second optical filter is
550nm-600nm。
Optionally, first optical filter be low pass filter, second optical filter be high-pass filter, described first
The cutoff wavelength of optical filter is less than the cutoff wavelength of the second optical filter.It is preferred that the cutoff wavelength of first optical filter and the second filter
The cutoff wavelength difference range of mating plate is more than 50nm.
Optionally, first optical filter be high-pass filter, second optical filter be low pass filter, described first
The cutoff wavelength of optical filter is more than the cutoff wavelength of the second optical filter.It is preferred that the cutoff wavelength of first optical filter and the second filter
The cutoff wavelength difference range of mating plate is more than 50nm.
Optionally, the scanned target is Quick Response Code or bar code.
Optionally, the scanning head is Handheld two-dimensional code probe.
It is an advantage of the current invention that the flare that light source is formed on scanned target surface is by can filter by first
What the light of piece was formed, and this hot spot can be filtered out just by the second optical filter, to be imaged in imaging device, into
Image definition without influencing whether scanning target..
Description of the drawings
It is the structural schematic diagram of scanning head of the present invention shown in attached drawing 1.
Specific implementation mode
The specific implementation mode for providing the present invention scanning head below in conjunction with the accompanying drawings elaborates.
It is the structural schematic diagram of scanning head of the present invention shown in attached drawing 1, including：One light source 10 and an imaging device
20.The imaging device 20 is used to be imaged scanned target.The light area of the light source 10 is located at the imaging probe
In imaging region, with auxiliary positioning scanned target 30.But light source 10 can also be formed while being irradiated to scanned target 30
With flare.The hot spot can be imaged in imaging device 20, and the image of scanned target 30 is made to be difficult to recognize.
Therefore, in this embodiment, the light source 10 includes the first optical filter 11, and first optical filter 11 is used
It filters in the luminous of light source；And the imaging device 20 includes the second optical filter 22, the scanned target 30 passes through
The imaging in the imaging device 20 of second optical filter 22.First optical filter, 11 and second optical filter 22 is set as：
It can be ended in second optical filter 22 by the light of first optical filter 11.It has the advantage that in this way,
The flare that light source 10 is formed on 30 surface of scanned target be by can be formed by the light of the first optical filter 11, and this
One hot spot can be filtered out just by the second optical filter 22, to be imaged in imaging device 20, and then do not interfere with and sweep
Retouch the image definition of target 30.In this embodiment, 30 scanned target of the scanned target be Quick Response Code or
Person's bar code, and scanning head is Handheld two-dimensional code scanning head.
As a kind of specific implementation mode, first optical filter, 11 and second optical filter 22 is bandpass filter, the two
Have different centre wavelength.So-called bandpass filter refers to only the light of specific wavelength being allowed to pass through.And in the specific wavelength
Around the percent of pass of a certain range of light continuously decrease, the wavelength through spectrum centered on the specific wavelength is in intensity
Existing normal distribution trend, the specific wavelength are referred to as centre wavelength.First optical filter 11 and the second optical filter 22 have difference
Centre wavelength, it is ensured that can be ended in second optical filter 22 by the light of first optical filter 11.
In order to obtain best filter effect, preferred embodiment is the middle cardiac wave of first optical filter, 11 and second optical filter 22
Long difference range is more than 50nm.For example, the light source 10 is white light source, the centre wavelength range of first optical filter 11 is
400nm-450nm, as blue color filter, and the centre wavelength range of second optical filter 22 is 550nm-600nm, as
Orange optical filter.Flare by the first optical filter 11 on 30 surface of scanned target is blue, and the second optical filter
22 can be filtered out just.
As a kind of specific implementation mode, first optical filter 11 is low pass filter, and second optical filter 22 is
High-pass filter.So-called low pass filter refers to that can pass through less than the light of a specific wavelength, and more than the light of this feature wavelength
It can not pass through, which is referred to as cutoff wavelength；And high-pass filter refers to that can lead to more than the light of a specific wavelength
It crosses, and the light less than this feature wavelength can not pass through, which is referred to as cutoff wavelength.In present embodiment,
The cutoff wavelength for being set as first optical filter 11 is less than the cutoff wavelength of the second optical filter 22, you can to ensure by described
The light of first optical filter 11 ends in second optical filter 22.It is preferred real in order to obtain best filter effect
The mode of applying is that the cutoff wavelength of first optical filter 11 is more than 50nm with the cutoff wavelength difference range of the second optical filter 22.
Similar, first optical filter 11 can also be set to high-pass filter, second optical filter 22 is arranged
For for low pass filter, and the cutoff wavelength of first optical filter 11 is more than the cutoff wavelength of the second optical filter 22.And it is excellent
The cutoff wavelength difference range of the cutoff wavelength 11 and the second optical filter 22 of selecting first optical filter is more than 50nm.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of scanning head, including：
One imaging device, the imaging device are used to be imaged scanned target；
The light area of one light source, the light source is located in the imaging region of the imaging device, and mesh is scanned with auxiliary positioning
Mark；It is characterized in that：
The light source includes the first optical filter, and first optical filter is for filtering to the luminous of light source；
The imaging device includes the second optical filter, and the scanned target is by second optical filter in the imaging device
Interior imaging；
First optical filter and the second optical filter are set as：It can be by the light of first optical filter in second filter
Mating plate ends, and avoids passing through the flare that the light of first optical filter is formed on the scanned target surface and exists
Imaging in the imaging device.
2. scanning head according to claim 1, which is characterized in that first optical filter and the second optical filter are band logical
Optical filter, the two have different centre wavelength.
3. scanning head according to claim 2, which is characterized in that the center of first optical filter and the second optical filter
Wavelength difference range is more than 50nm.
4. scanning head according to claim 3, which is characterized in that the light source is white light source, and described first filters
The centre wavelength range of piece is 400nm-450nm, and the centre wavelength range of second optical filter is 550nm-600nm.
5. scanning head according to claim 1, which is characterized in that first optical filter is low pass filter, described
Second optical filter is high-pass filter, and the cutoff wavelength of first optical filter is less than the cutoff wavelength of the second optical filter.
6. scanning head according to claim 5, which is characterized in that the cutoff wavelength of first optical filter and the second filter
The cutoff wavelength difference range of mating plate is more than 50nm.
7. scanning head according to claim 1, which is characterized in that first optical filter is high-pass filter, described
Second optical filter is low pass filter, and the cutoff wavelength of first optical filter is more than the cutoff wavelength of the second optical filter.
8. scanning head according to claim 7, which is characterized in that the cutoff wavelength of first optical filter and the second filter
The cutoff wavelength difference range of mating plate is more than 50nm.
9. scanning head according to claim 1, which is characterized in that the scanned target is Quick Response Code or bar shaped
Code.
10. scanning head according to claim 1, which is characterized in that the scanning head scans for Handheld two-dimensional code
Head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610381577.0A CN106066981B (en) | 2016-06-01 | 2016-06-01 | Scanning head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610381577.0A CN106066981B (en) | 2016-06-01 | 2016-06-01 | Scanning head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106066981A CN106066981A (en) | 2016-11-02 |
| CN106066981B true CN106066981B (en) | 2018-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610381577.0A Active CN106066981B (en) | 2016-06-01 | 2016-06-01 | Scanning head |
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| Country | Link |
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| CN (1) | CN106066981B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1214769A (en) * | 1996-02-02 | 1999-04-21 | 量度测试设备股份有限公司 | Method and apparatus for multi-spectral analysis in noninvasive NIR spectroscopy |
| CN103340601A (en) * | 2013-06-27 | 2013-10-09 | 中国科学院自动化研究所 | Multi-spectral imaging system and method based on endoscope |
| CN204120989U (en) * | 2014-07-22 | 2015-01-28 | 中国科学院自动化研究所 | Inner peeping type optical molecular image-guidance system |
| CN204515212U (en) * | 2015-03-20 | 2015-07-29 | 深圳市聚融鑫科科技有限公司 | A kind of spectral filtering device |
| CN105424668A (en) * | 2015-12-22 | 2016-03-23 | 深圳先进技术研究院 | Fluorescent screening system |
-
2016
- 2016-06-01 CN CN201610381577.0A patent/CN106066981B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1214769A (en) * | 1996-02-02 | 1999-04-21 | 量度测试设备股份有限公司 | Method and apparatus for multi-spectral analysis in noninvasive NIR spectroscopy |
| CN103340601A (en) * | 2013-06-27 | 2013-10-09 | 中国科学院自动化研究所 | Multi-spectral imaging system and method based on endoscope |
| CN204120989U (en) * | 2014-07-22 | 2015-01-28 | 中国科学院自动化研究所 | Inner peeping type optical molecular image-guidance system |
| CN204515212U (en) * | 2015-03-20 | 2015-07-29 | 深圳市聚融鑫科科技有限公司 | A kind of spectral filtering device |
| CN105424668A (en) * | 2015-12-22 | 2016-03-23 | 深圳先进技术研究院 | Fluorescent screening system |
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| Publication number | Publication date |
|---|---|
| CN106066981A (en) | 2016-11-02 |
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