CN1601232A - Light source for optical encoder - Google Patents
Light source for optical encoder Download PDFInfo
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- CN1601232A CN1601232A CN 03160219 CN03160219A CN1601232A CN 1601232 A CN1601232 A CN 1601232A CN 03160219 CN03160219 CN 03160219 CN 03160219 A CN03160219 A CN 03160219A CN 1601232 A CN1601232 A CN 1601232A
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- light source
- optical encoder
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- lens
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Abstract
The invention relates to an optical encoder light source. Said optical encoder includes a photodetector with several light-receiving surfaces and a encoding wheel capable of discontinuously rupturing light sent from light source. Said light source includes at least a light-emitting diode, a package shell body and an alignment unit. It also has a prism correspondent to light-receiving surfaces. Said alignment unit is assembled on said package shell body or said alignment unit and package shell body can be integrated into form. Said lens is planocovex lens or bicovex lens, can be effectively aligned with said light source and can improve the problem of proximity highlight interference.
Description
Technical field
The present invention relates to a kind of optical encoder light source, particularly relate to a kind of the improvement and closely connect the optical encoder light source that high light is interfered.
Background technology
Along with the progress of computer software and popularizing of figure user interface, mouse has been widely used in the user interface of computing machine.Known mouse (as the mechanical type mouse), it is to use spin to cooperate optical encoder to reach the function of control computer screen cursor.Referring to Fig. 1, be the vertical view of a known mechanical type mouse 10, this mechanical type mouse 10 mainly has a spin 100, at least one roller bearing 102 and corresponding optical encoder 110.This optical encoder 110 comprises the code wheel 112 (encoder wheel) with roller bearing 102 interlocks, reaches the optical module in code wheel 112 both sides, and it comprises a light source 114A and a photodetector 114B.This spin 100 drives X-and Y-direction encoding wheel 112 when rolling, light signal by 112 continuous this light source of blocking 114A of this code wheel, after photodetector 114B receives, handle by suitable control circuit, get final product the interpretation mouse moving direction, the coupled computer driver can be controlled the direction that onscreen cursor moves again.
As shown in Figure 2, be the side view of a known optical scrambler 110, this photodetector 114B mainly has two sensitive surfaces (oblique line part, not label), and accepts the light by 112 continuous blockings of code wheel, to differentiate direction and the displacement that spin 100 moves.Optical encoder 110 shown in Figure 2 is to use an interrupter-type code wheel 112, is judged the rotation of interrupter-type code wheel 112 by having or not of sensitive surface receiving optical signals.Yet, cause judgement to be difficult for because the characteristic of light diffraction can be dispersed by the light of light source 114A emission.Figure 3 shows that the side view of another known optical scrambler 110, this photodetector 114B also has two sensitive surfaces (not label), and code wheel 113 is that a lens arra is to overcome the diffraction phenomenon, the rotation of code wheel 113 be can whether judge by light focusing, direction and displacement that spin 100 moves further differentiated.
Yet above-mentioned two known optical scramblers 110 still have and closely connect the problem that high light disturbs, because light has interference, when therefore if the twice light beam is directed to two sensitive surfaces simultaneously, the high light that constructive interference produces can appear between two sensitive surfaces, cause signal interpretation mistake.As shown in Figure 4, closely connect the influence of high light interference for input for illustrating, solid line partly is desirable detection signal.But owing to closely connect the problem that high light disturbs, the signal that actual measurement is arrived can be shown in dotted line, can be subjected to the high light interference and can't drop to trough.
Figure 5 shows that the side view of another known optical scrambler 110, for addressing the above problem, can add an anti-dazzling screen 116 in photodetector 114B the place ahead, to cover position between two sensitive surfaces, yet because the undulatory property characteristic of light still can't effectively solve and closely connect the problem that high light disturbs.
Summary of the invention
The object of the present invention is to provide a kind of the improvement closely to connect the optical encoder light source that high light is interfered.
For reaching above-mentioned purpose, the invention provides a kind of optical encoder light source, this optical encoder has the photodetector of a plurality of sensitive surfaces and a code wheel with a light that continuous blocking is sent by light source, and this light source comprises: at least one light emitting diode; One encapsulating housing; Reach one and aim at the unit, have and the corresponding lens of sensitive surface.
The present invention also provides a kind of optical encoder light source, this optical encoder have the photodetector of a plurality of sensitive surfaces and a code wheel can between the light that sends by light source of continuous blocking, this light source comprises: at least one light emitting diode; One encapsulating housing; Reach one and aim at the unit, have and the corresponding opening of sensitive surface.
That is to say, optical encoder light source provided by the invention, wherein this optical encoder comprise one have the photodetector of a plurality of sensitive surfaces and a code wheel can between the light that sends by light source of continuous blocking, this light source comprises at least one light emitting diode, an encapsulating housing and is aimed at the unit, and it has and the corresponding lens of sensitive surface.This aligned units is to be assembled on this encapsulating housing or integrally formed with encapsulating housing; These lens be plano-convex lens or biconvex lens with the light emitted line focus of light emitting diode to corresponding sensitive surface.This aligned units can also closely connect the problem that high light disturbs with effective solution by constituting with the sensitive surface corresponding opening.
Description of drawings
Fig. 1 is the vertical view of a known mechanical type mouse;
Fig. 2 is the side view of a known optical scrambler;
Fig. 3 is the side view of another known optical scrambler;
Fig. 4 closely connects the synoptic diagram of high light interference for the influence of input for explanation;
Fig. 5 is the side view of another known optical scrambler;
Fig. 6 A and Fig. 6 B are the synoptic diagram of a preferred embodiment of the present invention;
Fig. 7 A and Fig. 7 B are the synoptic diagram of another preferred embodiment of the present invention; And
Fig. 8 A and Fig. 8 B are the synoptic diagram of another preferred embodiment of the present invention.
Wherein, description of reference numerals is as follows:
The 10-mouse; The 100-spin; The 102-roller bearing; The 110-optical encoder;
The 114A-light source; The 114B-photodetector; 112, the 113-code wheel;
The 116-anti-dazzling screen; The 102-roller bearing; The 210-optical encoder;
The 212-code wheel; The 214A-light source; The 214B-photodetector;
2140,2140A, 2140B-light emitting diode; The 2142-encapsulating housing;
2144-optical registration unit; The 2148-opening.
Embodiment
As shown in Figure 6A, be the synoptic diagram of optical encoder light source first preferred embodiment of the present invention.Optical encoder 210 of the present invention also has a light source 214A, a photodetector 214B and mainly has two sensitive surfaces (oblique line partly), one code wheel 212 can between the light that sends by light source 214A of continuous blocking, to differentiate direction and the displacement that a spin moves, because photodetector 214B and code wheel 212 are known technology, therefore do not repeat them here.
As shown in this figure, this light source 214A comprises a light emitting diode 2140 and an encapsulating housing 2142, has corresponding sensitive surface and the optical registration unit 2144 integrally formed with encapsulating housing 2142 on this encapsulating housing 2142.This optical registration unit 2144 can comprise two plano-convex lenss or two biconvex lens, will be registered to two sensitive surfaces of photodetector 214B by the light that light emitting diode 2140 sends.Among this first preferred embodiment, the lens number of notice optical registration unit 2144 not necessarily is defined as two, as long as corresponding with the number of sensitive surface, and it correspondingly is provided with the sensitive surface that light that the address can make light emitting diode 2140 send is registered to photodetector 214B and gets final product.
In above-mentioned preferred embodiment, the number of light emitting diode also can be not only one, but have and the corresponding number of sensitive surface.Shown in Fig. 6 B, if photodetector 214B has two sensitive surfaces (oblique line partly), then light source 214A also comprises two light emitting diode 2140A and 2140B, cooperates corresponding optical registration unit 2144, and the light that light source 214A is sent has better alignment.
Shown in Fig. 7 A, be the synoptic diagram of optical encoder light source second preferred embodiment of the present invention.As shown in this figure, this light source 214A comprises a light emitting diode 2140 and an encapsulating housing 2142, has an assembling optical registration unit 2144 thereon on this encapsulating housing 2142, this aligned units 2144 includes two lens partly, for example can be a plano-convex lens or a biconvex lens, will be registered to two sensitive surfaces of photodetector 214B by the light that light emitting diode 2140 sends.Among this second preferred embodiment, the number of notice lens not necessarily is defined as two, as long as corresponding with the number of sensitive surface, and it correspondingly is provided with the sensitive surface that light that the address can make light emitting diode 2140 send is registered to photodetector 214B and gets final product.
In above-mentioned preferred embodiment, the number of light emitting diode also can be not only one, but have and the corresponding number of sensitive surface.Shown in Fig. 7 B, if photodetector 214B has two sensitive surfaces (oblique line partly), then light source 214A also comprises two light emitting diode 2140A and 2140B, cooperates corresponding optical registration unit 2144, and the light that light source 214A is sent has better alignment.
Shown in Fig. 8 A, be the synoptic diagram of optical encoder light source the 3rd preferred embodiment of the present invention.As shown in this figure, this light source 214A comprises a light emitting diode 2140 and an encapsulating housing 2142, have pair of openings 2148 on this encapsulating housing 2142, the light of light emitting diode 2140 can be aimed at two sensitive surfaces of photodetector 214B via opening 2148 beam split.Among this 3rd preferred embodiment, the number of notice opening not necessarily is defined as two, as long as corresponding with the number of sensitive surface, and it correspondingly is provided with the sensitive surface that light that the address can make light emitting diode 2140 send is registered to photodetector 214B and gets final product.
In above-mentioned preferred embodiment, the number of light emitting diode also can be not only one, but have and the corresponding number of sensitive surface.Shown in Fig. 8 B, if photodetector 214B has two sensitive surfaces (oblique line partly), then light source 214A also comprises two light emitting diode 2140A and 2140B, cooperates corresponding opening 2148, and the light that light source 214A is sent has better alignment.
In sum, optical encoder light source of the present invention can effectively improve closely connecing the problem that high light is interfered, and is a rare invention in fact.But notice the application case scope is not limited to above-mentioned specific embodiment, and can do many variations, for example this light source can also be the better light source of same tones such as laser, and sensitive surface also is not limited only to two, can also be for more than three or three, and lens and light emitting diode also have corresponding number, all in the application's case claim.
Claims (12)
1, a kind of optical encoder light source is characterized in that, this optical encoder has the photodetector of a plurality of sensitive surfaces and a code wheel with a light that continuous blocking is sent by light source, and this light source comprises:
At least one light emitting diode;
One encapsulating housing; And
One aims at the unit, has and the corresponding lens of sensitive surface.
2, optical encoder light source as claimed in claim 1 is characterized in that this encapsulating housing is integrally formed with aligned units.
3, optical encoder light source as claimed in claim 2 is characterized in that these lens are plano-convex lens.
4, optical encoder light source as claimed in claim 2 is characterized in that these lens are biconvex lens.
5, optical encoder light source as claimed in claim 1 is characterized in that this aligned units is to be assembled on this encapsulating housing.
6, optical encoder light source as claimed in claim 5 is characterized in that these lens are plano-convex lens.
7, optical encoder light source as claimed in claim 5 is characterized in that these lens are biconvex lens.
8, optical encoder light source as claimed in claim 1 is characterized in that this light emitting diode has and the corresponding number of sensitive surface.
9, a kind of optical encoder light source is characterized in that, this optical encoder have the photodetector of a plurality of sensitive surfaces and a code wheel can between the light that sends by light source of continuous blocking, this light source comprises:
At least one light emitting diode;
One encapsulating housing; And
One aims at the unit, has and the corresponding opening of sensitive surface.
10, optical encoder light source as claimed in claim 9 is characterized in that this encapsulating housing is integrally formed with aligned units.
11, optical encoder light source as claimed in claim 9 is characterized in that this aligned units is to be assembled on this encapsulating housing.
12, optical encoder light source as claimed in claim 9 is characterized in that this light emitting diode has and the corresponding number of sensitive surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03160219 CN1601232A (en) | 2003-09-27 | 2003-09-27 | Light source for optical encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03160219 CN1601232A (en) | 2003-09-27 | 2003-09-27 | Light source for optical encoder |
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| Publication Number | Publication Date |
|---|---|
| CN1601232A true CN1601232A (en) | 2005-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03160219 Pending CN1601232A (en) | 2003-09-27 | 2003-09-27 | Light source for optical encoder |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082101A (en) * | 2010-07-02 | 2011-06-01 | 辽宁石油化工大学 | Packaging process method of photosensitive element |
| CN101666659B (en) * | 2008-09-05 | 2011-07-06 | 亚洲光学股份有限公司 | Detection device |
| CN106104214A (en) * | 2014-12-09 | 2016-11-09 | 株式会社安川电机 | encoder and motor with encoder |
| CN106104213A (en) * | 2014-12-09 | 2016-11-09 | 株式会社安川电机 | encoder and motor with encoder |
| TWI633282B (en) * | 2016-04-15 | 2018-08-21 | 曾信得 | Scanning light-guiding encoder by forward focusing |
| TWI704330B (en) * | 2019-03-08 | 2020-09-11 | 曾吉旺 | Optical encoder |
-
2003
- 2003-09-27 CN CN 03160219 patent/CN1601232A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666659B (en) * | 2008-09-05 | 2011-07-06 | 亚洲光学股份有限公司 | Detection device |
| CN102082101A (en) * | 2010-07-02 | 2011-06-01 | 辽宁石油化工大学 | Packaging process method of photosensitive element |
| CN102082101B (en) * | 2010-07-02 | 2012-07-11 | 辽宁石油化工大学 | Packaging process method of photosensitive element |
| CN106104214A (en) * | 2014-12-09 | 2016-11-09 | 株式会社安川电机 | encoder and motor with encoder |
| CN106104213A (en) * | 2014-12-09 | 2016-11-09 | 株式会社安川电机 | encoder and motor with encoder |
| TWI633282B (en) * | 2016-04-15 | 2018-08-21 | 曾信得 | Scanning light-guiding encoder by forward focusing |
| TWI704330B (en) * | 2019-03-08 | 2020-09-11 | 曾吉旺 | Optical encoder |
| CN111664878A (en) * | 2019-03-08 | 2020-09-15 | 曾吉旺 | Optical encoder |
| CN111664878B (en) * | 2019-03-08 | 2022-06-10 | 曾吉旺 | Optical encoder |
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