CN101990052A - Contact type image sensor - Google Patents
Contact type image sensor Download PDFInfo
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- CN101990052A CN101990052A CN2010105725875A CN201010572587A CN101990052A CN 101990052 A CN101990052 A CN 101990052A CN 2010105725875 A CN2010105725875 A CN 2010105725875A CN 201010572587 A CN201010572587 A CN 201010572587A CN 101990052 A CN101990052 A CN 101990052A
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Abstract
The invention relates to an image reading device, in particular to a contact type image sensor without light reflection. The contact type image sensor comprises a frame, a luminous light source, a lens, a photoelectric conversion chip, a sensor substrate and a glass plate for loading an original manuscript, wherein the surface of the glass plate is provided with a groove, and the bottom surface of the groove is provided with a non-reflecting film. Because the bottom surface of the groove of the glass plate is provided with the non-reflecting film, light is only subjected to transmission but not be reflected when passing through the surface of the groove of the glass plate, light reflection loss is effectively reduced, and the purity and the strength of light signals are increased. The invention is applied to the contact type image sensor and can effectively increase the utilization rate of light and reduce signal disturbance caused by reflected light.
Description
Technical field
The present invention relates to a kind of image read-out, the unreflected contact-type image sensor of specifically a kind of light.
Background technology
Fig. 1 is the sectional drawing of existing contact-type image sensor, mark among the figure: the 1st, the glass plate of lift-launch original copy, the 7th, illuminating source, the 6th, lens, the 5th, the opto-electronic conversion chip of receiver lens 6 light that converges, the 4th, carry the sensor base plate of the opto-electronic conversion chip 5 be arranged in a straight line, the 3rd, hold the framework of light source 7, lens 6, sensor base plate 4 and glass plate 1.
In above-mentioned contact-type image sensor, the light that light source 7 sends, see through glass plate 1, shine on the original copy (not drawing among the figure) of outside, literal black region light on the original copy is absorbed, and in other white undercolor region of original copy, light almost 100% is reflected, these reverberation pass glass plate 1 again, collected the photosensitive area that shines the opto-electronic conversion chip 5 on the sensor base plate 4 by lens 6, opto-electronic conversion chip 5 is to carry out opto-electronic conversion by the many photosensitive areas and the light that can will shine each photosensitive area, and the drive circuit of signal output is formed, the light that receives converts the signal of telecommunication to after overdrive circuit output is outwards exported as image (literal) information.Original copy constantly moves, and the image information of being put down in writing on it (literal) will be read continuously.
In the above-mentioned contact-type image sensor, when passing glass plate 1 surface, have part light and returned, can cause the part light loss by reflection of glass surface from the light of original copy reflection; In addition, a part of light in the light that is reflected by glass plate shines original copy surface and other body surface again, and this part light through original copy and the reflection of other objects, shines glass surface more once more, so go round and begin again, can cause certain interference former light signal purity.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of and reduce light loss and reduce the contact-type image sensor that light signal disturbs.
The present invention can reach by following measure.
A kind of contact-type image sensor comprises the glass plate of framework, illuminating source, lens, opto-electronic conversion chip, sensor base plate and lift-launch original copy being characterised in that glass pane surface is provided with groove that the bottom portion of groove surface is provided with non reflecting film.
Groove of the present invention is located at the glass plate upper surface directly over the lens, and the non reflecting film on bottom portion of groove surface can be one deck, also can be multilayer, and the width of groove is equal to or greater than the width of lens.
Glass pane surface groove two sides and glass surface angle can be set arbitrarily according to the paper feed needs among the present invention, and glass groove two sides can be the planes, also can be the ripple glaze shape.
The invention has the beneficial effects as follows,,, can improve the utilance of light when seeing through glass surface, also can reduce the interference of reverberation former light so light can not reflect owing to be provided with non reflecting film.Because glass surface is provided with groove, non reflecting film is located at bottom portion of groove, so can not cause wearing and tearing to non reflecting film during paper feed, plays a protective role.Because glass groove two sides are the ripple glaze shape, so can reduce paper feed frictional force, effectively solve the problem of paperboard in the paper feed process.
Description of drawings:
Fig. 1 is existing contact-type image sensor sectional drawing.
Fig. 2 is a sectional drawing of the present invention.
Fig. 3, Fig. 4 are sectional drawings of the present invention.
Mark among the figure: glass plate 1, non reflecting film 2, framework 3, sensor base plate 4, opto-electronic conversion chip 5, lens 6, illuminating source 7.
Embodiment:
Below in conjunction with drawings and Examples the present invention is further described:
As shown in Figure 2, a kind of contact-type image sensor, the glass plate 1 that comprises framework 3, illuminating source 7, lens 6, sensor base plate 4, opto-electronic conversion chip 5 and lift-launch original copy, the structure and the annexation of framework 3, illuminating source 7, lens 6, sensor base plate 4, opto-electronic conversion chip 5 are same as the prior art, this does not give unnecessary details, the invention is characterized in that glass plate 1 surface is provided with groove, groove floor is provided with non reflecting film 2, this reality and novel described groove are located at glass plate 1 surface directly over the lens 6, and the width of groove is not less than the width of lens 6.
The groove side can be the plane that is various angles with glass surface, also can be to be the ripple glaze shape.The non reflecting film 2 of bottom portion of groove can be set to the light of specific wavelength is played specific areflexia effect, and the quantity of non reflecting film can be arranged to one or more layers.
Embodiment 1: as shown in Figure 3, a kind of contact-type image sensor, comprise framework 3, illuminating source 7, lens 6, sensor base plate 4, the glass plate 1 of opto-electronic conversion chip 5 and lift-launch original copy, framework 3, illuminating source 7, lens 6, sensor base plate 4, the structure and the annexation of opto-electronic conversion chip 5 are same as the prior art, this does not give unnecessary details, present embodiment is characterised in that glass plate 1 surface is provided with groove, groove floor is provided with one deck non reflecting film 2, groove is located at the upper surface of the glass plate 1 directly over the lens 6, the width of groove equals the width (diameter) of lens 6, and the groove side is the plane.
Embodiment 2: as shown in Figure 4, a kind of contact-type image sensor, comprise framework 3, illuminating source 7, lens 6, sensor base plate 4, the glass plate 1 of opto-electronic conversion chip 5 and lift-launch original copy, framework 3, illuminating source 7, lens 6, sensor base plate 4, the structure and the annexation of opto-electronic conversion chip 5 are same as the prior art, this does not give unnecessary details, present embodiment is characterised in that glass plate 1 surface is provided with groove, groove floor is provided with two-layer non reflecting film 2, groove is located at the upper surface of the glass plate 1 directly over the lens 6, the width of groove is greater than the width of lens 6, the groove side becomes the ripple glaze shape, the ripple glaze side can make paper feed more smooth and easy, effectively reduces frictional force and static content.
Claims (5)
1. contact-type image sensor comprises the glass plate of framework, illuminating source, lens, opto-electronic conversion chip, sensor base plate and lift-launch original copy it is characterized in that glass pane surface is provided with groove that glass bottom portion of groove surface is provided with non reflecting film.
2. a kind of contact-type image sensor according to claim 1 is characterized in that described groove is located on the glass plate directly over the lens.
3. a kind of contact-type image sensor according to claim 1 is characterized in that the width of groove is not less than the width of lens.
4. a kind of contact-type image sensor according to claim 1 is characterized in that glass plate groove two sides are the ripple glaze shape.
5. a kind of contact-type image sensor according to claim 1 is characterized in that the non reflecting film of glass bottom portion of groove can play specific areflexia effect to the light of specific wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010572587.5A CN101990052B (en) | 2010-12-03 | 2010-12-03 | A kind of contact-type image sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010572587.5A CN101990052B (en) | 2010-12-03 | 2010-12-03 | A kind of contact-type image sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101990052A true CN101990052A (en) | 2011-03-23 |
| CN101990052B CN101990052B (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010572587.5A Active CN101990052B (en) | 2010-12-03 | 2010-12-03 | A kind of contact-type image sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014015595A1 (en) * | 2012-07-27 | 2014-01-30 | 威海华菱光电股份有限公司 | Contact type image sensor, image and text processing system and processing method |
| CN103916563A (en) * | 2013-01-09 | 2014-07-09 | 菱光科技股份有限公司 | Contact type image sensing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002094742A (en) * | 2000-09-14 | 2002-03-29 | Citizen Electronics Co Ltd | Contact image sensor |
| CN2519559Y (en) * | 2002-01-05 | 2002-10-30 | 山东华菱电子有限公司 | Contact-type imaging sensor |
| CN101374188A (en) * | 2007-08-22 | 2009-02-25 | 威海华菱光电有限公司 | Image sensor |
| CN201869276U (en) * | 2010-12-03 | 2011-06-15 | 威海华菱光电有限公司 | Contact image sensor |
-
2010
- 2010-12-03 CN CN201010572587.5A patent/CN101990052B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002094742A (en) * | 2000-09-14 | 2002-03-29 | Citizen Electronics Co Ltd | Contact image sensor |
| CN2519559Y (en) * | 2002-01-05 | 2002-10-30 | 山东华菱电子有限公司 | Contact-type imaging sensor |
| CN101374188A (en) * | 2007-08-22 | 2009-02-25 | 威海华菱光电有限公司 | Image sensor |
| CN201869276U (en) * | 2010-12-03 | 2011-06-15 | 威海华菱光电有限公司 | Contact image sensor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014015595A1 (en) * | 2012-07-27 | 2014-01-30 | 威海华菱光电股份有限公司 | Contact type image sensor, image and text processing system and processing method |
| CN103916563A (en) * | 2013-01-09 | 2014-07-09 | 菱光科技股份有限公司 | Contact type image sensing device |
| CN103916563B (en) * | 2013-01-09 | 2016-12-28 | 菱光科技股份有限公司 | Contact image sensing device |
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| Publication number | Publication date |
|---|---|
| CN101990052B (en) | 2015-12-02 |
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Address after: 264209 Weihai high tech Industrial Development Zone, Shandong Torch Road, No. 159 Applicant after: Weihai Hualing Opto-electronics Co.,Ltd. Address before: 264209 Weihai high tech Industrial Development Zone, Shandong Torch Road, No. 159 Applicant before: Weihai Hualing Optoelectronic Co., Ltd. |
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