CN2696051Y - Light source structure of optical encoder - Google Patents
Light source structure of optical encoder Download PDFInfo
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- CN2696051Y CN2696051Y CN 200320100910 CN200320100910U CN2696051Y CN 2696051 Y CN2696051 Y CN 2696051Y CN 200320100910 CN200320100910 CN 200320100910 CN 200320100910 U CN200320100910 U CN 200320100910U CN 2696051 Y CN2696051 Y CN 2696051Y
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- optical encoder
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Abstract
The utility model provides a light source structure of a light encoder. The light encoder comprises a light detector which is provided with a plurality of light receiving surfaces, and an encoding wheel which can interruptedly break light rays sent out by a light source. The light source structure of the light encoder comprises at least one light emitting diode, an encapsulation shell body, and an aligning unit. The light source structure of the light encoder is provided with a lens which is opposite to the light receiving surfaces. The aligning unit is assembled on the encapsulation shell body, or is integrally formed with the encapsulation shell body. The lens is a flat convex lens or a double-convex lens, is effectively aligned with the light source, and improves the problem of near connecting strong light intervening.
Description
Technical field
The utility model relates to a kind of optical encoder light-source structure, and particularly a kind of the improvement closely connects the optical encoder light-source structure that high light (proximal intense 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 attached 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, connect closely that high light is meant because the wave characteristic of light, 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, because this light is quite near from photodetector, therefore can influence testing result, 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, with cover two sensitive surfaces between the position, 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 purpose of this utility model is to provide a kind of the improvement closely to connect the optical encoder light-source structure that high light is interfered.
For reaching above-mentioned purpose, the utility model provides a kind of optical encoder light-source structure, this optical encoder has the photodetector with a plurality of sensitive surfaces that a continuous code wheel and that interdicts the light that is sent by light source is positioned at this code wheel one side, this light-source structure comprises: an encapsulating housing is positioned at the opposite side of this code wheel; At least one light emitting diode is located on this encapsulating housing; Reach one and aim at the unit, be located on this encapsulating housing, this aligned units has the lens that light corresponding with described sensitive surface and that described light emitting diode is sent arrives described sensitive surface.
The utility model also provides a kind of optical encoder light-source structure, this optical encoder has the photodetector with a plurality of sensitive surfaces that a continuous code wheel and that interdicts the light that is sent by light source is positioned at this code wheel one side, this light-source structure comprises: an encapsulating housing is positioned at the opposite side of this code wheel; At least one light emitting diode is located on this encapsulating housing; Reach one and aim at the unit, be located on this encapsulating housing, this aligned units has the opening that light corresponding with described sensitive surface and that described light emitting diode is sent arrives described sensitive surface.
That is to say, a kind of optical encoder light-source structure that the utility model provides, 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 structure 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.
Optical encoder light-source structure of the present utility model can solve effectively than prior art and closely connect the problem that high light disturbs.
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 utility model;
Fig. 7 A and Fig. 7 B are the synoptic diagram of another preferred embodiment of the present utility model; And
Fig. 8 A and Fig. 8 B are the synoptic diagram of another preferred embodiment of the present utility model.
Wherein, description of reference numerals is as follows:
10-mouse; 100-spin; 102-roller bearing; 110-optical encoder;
114A-light source; 114B-photodetector; 112,113-code wheel;
116-anti-dazzling screen; 102-roller bearing; 210-optical encoder;
212-code wheel; 214A-light source; 214B-photodetector;
2140,2140A, 2140B-light emitting diode; 2142-encapsulating housing;
2144-optical registration unit; 2148-opening.
Embodiment
As shown in Figure 6A, be the synoptic diagram of optical encoder light emitted structure first preferred embodiment of the present utility model.Optical encoder 210 of the present utility model 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 embodiments, 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 emitted structure second preferred embodiment of the present utility model.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 figure, 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 emitted structure the 3rd preferred embodiment of the present utility model.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 structure of the present utility model can effectively improve closely connecing the problem that high light is interfered.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 structure is characterized in that, this optical encoder has the photodetector with a plurality of sensitive surfaces that a continuous code wheel and that interdicts the light that is sent by light source is positioned at this code wheel one side, and this light-source structure comprises:
One encapsulating housing is positioned at the opposite side of this code wheel;
At least one light emitting diode is located on this encapsulating housing; And
One aims at the unit, is located on this encapsulating housing, and this aligned units has the lens that light corresponding with described sensitive surface and that described light emitting diode is sent arrives described sensitive surface.
2, optical encoder light-source structure as claimed in claim 1 is characterized in that this encapsulating housing is integrally formed with aligned units.
3, optical encoder light-source structure as claimed in claim 2 is characterized in that these lens are plano-convex lens.
4, optical encoder light-source structure as claimed in claim 2 is characterized in that these lens are biconvex lens.
5, optical encoder light-source structure 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 structure as claimed in claim 5 is characterized in that these lens are plano-convex lens.
7, optical encoder light-source structure as claimed in claim 5 is characterized in that these lens are biconvex lens.
8, optical encoder light-source structure 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 structure is characterized in that, this optical encoder has the photodetector with a plurality of sensitive surfaces that a continuous code wheel and that interdicts the light that is sent by light source is positioned at this code wheel one side, and this light-source structure comprises:
One encapsulating housing is positioned at the opposite side of this code wheel;
At least one light emitting diode is located on this encapsulating housing; And
One aims at the unit, is located on this encapsulating housing, and this aligned units has the opening that light corresponding with described sensitive surface and that described light emitting diode is sent arrives described sensitive surface.
10, optical encoder light-source structure as claimed in claim 9 is characterized in that this encapsulating housing is integrally formed with aligned units.
11, optical encoder light-source structure 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 structure 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 200320100910 CN2696051Y (en) | 2003-10-13 | 2003-10-13 | Light source structure of optical encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320100910 CN2696051Y (en) | 2003-10-13 | 2003-10-13 | Light source structure of optical encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2696051Y true CN2696051Y (en) | 2005-04-27 |
Family
ID=34761720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320100910 Expired - Fee Related CN2696051Y (en) | 2003-10-13 | 2003-10-13 | Light source structure of optical encoder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2696051Y (en) |
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2003
- 2003-10-13 CN CN 200320100910 patent/CN2696051Y/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |