CN101567039A - Image detecting device - Google Patents
Image detecting device Download PDFInfo
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- CN101567039A CN101567039A CNA2008100940986A CN200810094098A CN101567039A CN 101567039 A CN101567039 A CN 101567039A CN A2008100940986 A CNA2008100940986 A CN A2008100940986A CN 200810094098 A CN200810094098 A CN 200810094098A CN 101567039 A CN101567039 A CN 101567039A
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- light beam
- detecting device
- image detecting
- optical axis
- sensing element
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Abstract
The invention relates to an image detecting device comprising an illuminating system and a sensing system, wherein the illuminating system is used for supplying a light beam to a reflecting surface in order to generate a reflecting light beam; the sensing system comprises a sensing element and a focusing element, the sensing element is arranged on a transmitting path of the reflecting light beam to receive the reflecting light beam, the focusing element is arranged between the sensing element and the reflecting surface, and an optical axis of the focusing element deviates a primary optical axis of the reflecting light beam. Because the optical axis of the focusing element deviates from the primary optical axis of the reflecting light beam in order to reduce the optical path difference of light beams of the reflecting light beam, the image detecting device has optimal imaging quality.
Description
Technical field
The present invention relates to a kind of image detecting device, particularly relate to the good image detecting device of a kind of image quality.
Background technology
See also Fig. 1, shown in Figure 2, Fig. 1 is the structural representation that has known a kind of image detecting device now, and Fig. 2 is the synoptic diagram of light beam at the sensing system of Fig. 1.Existing known image detecting device 100 comprises an illuminator 110 and a sensing system 120.This illuminator 110 comprises a light source 112 and lens 114, and wherein, light source 112 is in order to provide a light beam 113, and lens 114 then are to be disposed on the bang path of light beam 113.Light beam 113 has an optical axis 113a, and is to represent light beam 113 with optical axis 113a in Fig. 1.This sensing system 120 comprises a sensing element 122 and lens 124.Sensing element 122 is to be disposed on the bang path of the face of being reflected 50 beam reflected 113 with lens 124, and lens 124 are to be disposed at before the sensing element 122.
In existing known sensing system 120, the optical axis 124b of lens 124 is overlapping with the optical axis 113a of light beam 113.Lens 124 are in order to light beam 113 is converged on the sensing element 122.Yet the problem that prior art exists the light path (optical path) of each light between reflecting surface 50 and sensing element 122 of light beam 113 to differ greatly.Main light (being the stronger light of energy) 113b, 113c with light beam 113 are example, and obviously greater than the light path of light 113b, this will cause image quality bad to the light path of light 113c.
Seeing also shown in Figure 3ly, for the simulation drawing of the bang path of the light of light beam in the existing known sensing system, is to illustrate to utilize optical simulation software to simulate the bang path of light beam 113 in existing known sensing system 120.By finding out among Fig. 3, in existing known sensing system 120, light beam 113 can't accurately focus on the sensing element 122.So, will produce distortion (distortion), and then reduce image quality.
This shows that above-mentioned existing image detecting device obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of image detecting device of new structure, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned existing image detecting device exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of image detecting device of new structure, can improve general existing image detecting device, make it have more practicality.Through constantly research, design, and, create the present invention who has practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
The objective of the invention is to, overcome the defective that above-mentioned existing image detecting device exists, and a kind of image detecting device of new structure is provided, technical matters to be solved is to make it can improve image quality, is very suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of image detecting device that the present invention proposes, it comprises: an illuminator, in order to light beam to a reflecting surface to be provided, to produce a folded light beam; And a sensing system, comprising: a sensing element is disposed on the bang path of this folded light beam, to receive this folded light beam; And a collective optics, be disposed between this sensing element and this reflecting surface, wherein the primary optical axis of this folded light beam of optical axis deviation of this collective optics.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid image detecting device, the primary optical axis of parallel this folded light beam of optical axis of wherein said collective optics.
Aforesaid image detecting device, wherein said collective optics comprises lens.
Aforesaid image detecting device, wherein said illuminator comprises a light source, in order to light beam to be provided.
Aforesaid image detecting device, wherein said light source comprise a light emitting diode or a laser diode.
Aforesaid image detecting device, it more comprises a circuit board, and this light source and this sensing element are to be disposed on this circuit board.
Aforesaid image detecting device, wherein said sensing element comprise a CMOS (Complementary Metal Oxide Semiconductor) Image Sensor or a charge coupled cell.
Aforesaid image detecting device, it is an optical mice or a fingeprint distinguisher.
The present invention compared with prior art has tangible advantage and beneficial effect.As known from the above,, the invention provides a kind of image detecting device, comprise an illuminator and a sensing system for achieving the above object.This illuminator is in order to light beam to a reflecting surface to be provided, to produce a folded light beam; And this sensing system comprises a sensing element and a collective optics.Sensing element is to be disposed on the bang path of folded light beam, to receive folded light beam.Collective optics is to be disposed between sensing element and the reflecting surface, wherein the primary optical axis of the optical axis deviation folded light beam of collective optics.
In one embodiment of this invention, the primary optical axis of the optical axis parallel reflected beams of above-mentioned collective optics.In one embodiment of this invention, above-mentioned collective optics comprises lens.In one embodiment of this invention, above-mentioned illuminator comprises a light source, in order to above-mentioned light beam to be provided.In one embodiment of this invention, above-mentioned light source comprise a light emitting diode (light emitting diode, LED) or a laser diode (laser diode, LD).In one embodiment of this invention, above-mentioned image detecting device more comprises a circuit board, and light source and sensing element are to be disposed on this circuit board.In one embodiment of this invention, above-mentioned sensing element comprise a CMOS (Complementary Metal Oxide Semiconductor) Image Sensor (CMOS image sensor) or a charge coupled cell (charge coupled device, CCD).In one embodiment of this invention, above-mentioned image detecting device is an optical mice or a fingeprint distinguisher.
By technique scheme, image detecting device of the present invention has following advantage and beneficial effect at least: the present invention is because make the primary optical axis of the optical axis deviation folded light beam of collective optics, can reduce the optical path difference of each light in the folded light beam, so image detecting device of the present invention has preferable image quality.
In sum, the present invention can improve image quality, very practical, no matter it all has bigger improvement on product structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing image detecting device has the outstanding effect of enhancement, thereby being suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the synoptic diagram that has known a kind of image detecting device now.
Fig. 2 is the synoptic diagram of light beam at the sensing system of Fig. 1.
Fig. 3 is the simulation drawing that has the bang path of the light of light beam in the known sensing system now.
Fig. 4 is the synoptic diagram of a kind of image detecting device of preferred embodiment of the present invention.
Fig. 5 is the synoptic diagram of light beam at the sensing system of Fig. 4.
Fig. 6 is the simulation drawing of the bang path of the light of light beam in the sensing system of Fig. 4.
50,60: reflecting surface 100,200: image detecting device
110,210: illuminator 112,212: light source
113,213: light beam 113a: the primary optical axis of light beam
113b, 113c, 123b, 123c: light 114,124: lens
124b: the optical axis 120,220 of lens: sensing system
122,222: sensing element 213 ': folded light beam
213a: the primary optical axis 214,224 of folded light beam: collective optics
224b: the optical axis 230 of collective optics: circuit board
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of image detecting device, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can be known to present in the following detailed description that cooperates with reference to graphic preferred embodiment.By the explanation of embodiment, when can being to reach technological means that predetermined purpose takes and effect to get one more deeply and concrete understanding to the present invention, yet appended graphic only provide with reference to the usefulness of explanation, be not to be used for the present invention is limited.
See also Fig. 4 and shown in Figure 5, Fig. 4 is the synoptic diagram of a kind of image detecting device of preferred embodiment of the present invention, and Fig. 5 is the synoptic diagram of light beam at the sensing system of Fig. 4.The image detecting device 200 of preferred embodiment of the present invention can be an optical mice or a fingeprint distinguisher, but not as limit.This image detecting device 200 comprises an illuminator 210 and a sensing system 220.
This illuminator 210 is in order to provide a light beam 213 to one reflectings surface 60, to produce a folded light beam 213 '.In other words, this light beam 213 becomes folded light beam 213 ' after reflecting via reflecting surface 60.Folded light beam 213 ' has a primary optical axis 213a, and is to represent folded light beam 213 ' with primary optical axis 213a in Fig. 4.
This sensing system 220 comprises a sensing element 222 and a collective optics 224.Sensing element 222 is to be disposed on the bang path of folded light beam 213 ' with collective optics 224, and collective optics 224 is to be disposed between sensing element 222 and the reflecting surface 60.The optical axis 224b of collective optics 224 is the primary optical axis 213a that depart from folded light beam 213 '.
In the image detecting device 200 of the present invention, above-mentioned illuminator 210 for example comprises a light source 212 and a collective optics 214, wherein:
This light source 212 can be light emitting diode or laser diode, and light source 212 is in order to light beam 213 to be provided.
This collective optics 214 can be lens or is made up of a plurality of lens.
In addition, image detecting device 200 of the present invention for example more comprises a circuit board 230, and light source 212 is to be disposed on the circuit board 230 with sensing element 222.In the present embodiment, light source 212 is also configurable on different circuit boards with sensing element 222.In addition, the primary optical axis 213a of folded light beam 213 ' for example is the optical axis 224b that is parallel to collective optics 224 in fact.
Because the optical path difference of each light of the light beam of prior art is bigger, present embodiment is by mobile collective optics 224, make the optical axis 224b of this collective optics 224 depart from the primary optical axis 213a of folded light beam 213 ', so that the optical path difference of each light of folded light beam 213 ' diminishes.Compared to prior art, as can be seen from Figure 5, the optical path difference of the main light of folded light beam 213 ' (being the stronger light of energy) 213b, 213c is less, so can improve image quality.
See also Fig. 4 and shown in Figure 6, wherein Fig. 6 is the simulation drawing of the bang path of the light of light beam in the sensing system of Fig. 4, illustrates and utilizes optical simulation software to come the bang path of simulated reflections light beam 213 ' in the sensing system 220 of Fig. 4.By among Fig. 6 as can be seen, depart from the primary optical axis 213a of folded light beam 213 ' at the optical axis 224b that makes collective optics 224 after, folded light beam 213 ' can accurately focus on the sensing element 222.Therefore, can avoid the generation that distorts, and then improve image quality.
In sum, in image detecting device of the present invention, because reduce the optical path difference of each light of folded light beam by the primary optical axis of the optical axis deviation folded light beam of collective optics, therefore image detecting device of the present invention has preferable image quality.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (8)
1, a kind of image detecting device is characterized in that it comprises:
One illuminator is in order to light beam to a reflecting surface to be provided, to produce a folded light beam; And
One sensing system comprises:
One sensing element is disposed on the bang path of this folded light beam, to receive this folded light beam; And
One collective optics is disposed between this sensing element and this reflecting surface, wherein the primary optical axis of this folded light beam of optical axis deviation of this collective optics.
2, image detecting device according to claim 1 is characterized in that the primary optical axis of parallel this folded light beam of optical axis of wherein said collective optics.
3, image detecting device according to claim 1 is characterized in that wherein said collective optics comprises lens.
4, image detecting device according to claim 1 is characterized in that wherein said illuminator comprises a light source, in order to this light beam to be provided.
5, image detecting device according to claim 4 is characterized in that wherein said light source comprises a light emitting diode or a laser diode.
6, image detecting device according to claim 4 it is characterized in that it more comprises a circuit board, and this light source and this sensing element is to be disposed on this circuit board.
7, image detecting device according to claim 1 is characterized in that wherein said sensing element comprises a CMOS (Complementary Metal Oxide Semiconductor) Image Sensor or a charge coupled cell.
8, image detecting device according to claim 1 is characterized in that it is an optical mice or a fingeprint distinguisher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100940986A CN101567039B (en) | 2008-04-25 | 2008-04-25 | Image detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100940986A CN101567039B (en) | 2008-04-25 | 2008-04-25 | Image detecting device |
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| Publication Number | Publication Date |
|---|---|
| CN101567039A true CN101567039A (en) | 2009-10-28 |
| CN101567039B CN101567039B (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100940986A Active CN101567039B (en) | 2008-04-25 | 2008-04-25 | Image detecting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913021A (en) * | 2016-01-21 | 2016-08-31 | 友达光电股份有限公司 | Fingerprint sensing device |
| CN108960007A (en) * | 2017-05-19 | 2018-12-07 | 致伸科技股份有限公司 | optical fingerprint identification module |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003222634A (en) * | 2002-01-31 | 2003-08-08 | Sharp Corp | Optical movement detecting device, transferring system, and transfer processing system |
| WO2005109314A2 (en) * | 2004-04-29 | 2005-11-17 | Cross Match Technologies, Inc. | Method and apparatus for discriminating ambient light in a fingerprint scanner |
| US20060202104A1 (en) * | 2005-03-14 | 2006-09-14 | Microalign Technologies, Inc. | Contact-type monolithic image sensor |
-
2008
- 2008-04-25 CN CN2008100940986A patent/CN101567039B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913021A (en) * | 2016-01-21 | 2016-08-31 | 友达光电股份有限公司 | Fingerprint sensing device |
| CN105913021B (en) * | 2016-01-21 | 2019-09-20 | 友达光电股份有限公司 | fingerprint sensing device |
| CN108960007A (en) * | 2017-05-19 | 2018-12-07 | 致伸科技股份有限公司 | optical fingerprint identification module |
| CN108960007B (en) * | 2017-05-19 | 2022-01-04 | 致伸科技股份有限公司 | Optical fingerprint identification module |
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| Publication number | Publication date |
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| CN101567039B (en) | 2013-09-04 |
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