CN101110232A - Integrated optical component and optical pick-up apparatus using this component - Google Patents
Integrated optical component and optical pick-up apparatus using this component Download PDFInfo
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- CN101110232A CN101110232A CNA2006100290550A CN200610029055A CN101110232A CN 101110232 A CN101110232 A CN 101110232A CN A2006100290550 A CNA2006100290550 A CN A2006100290550A CN 200610029055 A CN200610029055 A CN 200610029055A CN 101110232 A CN101110232 A CN 101110232A
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Abstract
The invention discloses an integrated optical device that integrates more than two illuminant sections, their corresponding light receiving sections and a lens that changes the path of the light beam for the integration of optical device as well as a light pickup device that utilizes the integrated optical device. The integrated optical device is characterized in that: it comprises 3 reflectors with inclined planes that are formed of equal angle; 3 laser diodes that are positioned in opposition to the inclined planes; an optical detector that is positioned between two inclined planes and two laser diodes; a scanning transmission electric lens that supports the laser diode and the optical detector. The integrated light pickup device comprises: the integrated optical device; a holograph component that is positioned at upper section of the integrated optical device; a conversion method that converts the light beam transmitted from the integrated optical device into horizontal light beam; a path conversion method that converts the horizontal light beam path to the direction of the compact disc; an object lens that focuses the light beam to be converted on the compact disc via the light path conversion method. Therefore, the invention is able to simplify the structure of light pickup device and ensures minimized size.
Description
Technical field
The invention relates to optical take-up apparatus.Especially for the integrated of optical device with plural illuminating part (Laser diode) and light absorbing part corresponding (Photo diode) with it, reach integrated optical component that the lens of change beam path therebetween are integrated and the optical take-up apparatus that utilizes these parts.
Background technology
Along with the compression of moving image informations such as picture film, requirement is similar to CD (Compact Disc CD) and DVD (Digital Versatile Disc Digital video disc) CD can be stored the digital video signal of 2 little real components.But, also just can only write down 4.7GBytes even in CD, have the DVD of max cap., so in fact and be not suitable for writing down the moving image information of 2 little real components.
High definition digital is play when the worldwide popularization is come recently, and exploitation BD (Blu-ray Disc) has become the task of top priority with record and playing device.The high opening number of use in described blue laser diode (BD:Blue Laser Diode blue laser diode) the level optical record-play device (for example, NA=0.85), short wavelength's (for example, laser 405nm).
Simultaneously, along with video disc recording and playing device can be used in DVD, CD, BD multiple medium such as (Blue-ray Disk blue laser discs), because a kind of laser can't be play all CDs, so just seem very necessary with 2 wavelength or the corresponding optical record-play device of 3 wavelength.
Fig. 1 is a pie graph existing and the corresponding optical take-up apparatus of 3 wavelength.
With reference to Fig. 1, its formation comprises following several sections: first to the 3rd laser diode 11,12,13 that produces the light beam of different wavelength; The photo- fission device 21,22,23 that the incident direction of the laser beam that produces according to described first to the 3rd laser diode 11,12,13 sees through light beam or reflects; To be converted to the finder lens 24 of parallel beam because of photo- fission device 21,22,23 beam reflected; The path of described parallel beam is transformed into catoptron 25 on the object lens direction, described catoptron 25 beam reflected are shone object lens 26 on the CD 27; The photodetector 30 of the folded light beam that reception reflects from described CD 27.
Here, first laser diode 11 is that CD is used, and second laser diode 12 is that DVD is used, and the 3rd laser diode 13 is as blue laser diode, for BD used.
So,, reflect by each photo- fission device 21,22,23 in order to make the path unanimity of the laser beam that from first, second, third laser diode 11,12,13 that is provided with respectively separately, produces.Promptly, the light beam (780nm) that first laser diode 11 produces reflects with the first photo-fission device 21, see through the 3rd photo-fission device 23 and incide finder lens 24, the light beam (680nm) that produces from second laser diode 12 is reflected the second photo-fission device 22, sees through the first, the 3rd photo- fission device 21,23 and incides finder lens 24.The light beam (405nm) that produces from the 3rd laser diode 13 is reflected the 3rd photo-fission device 23, incides finder lens 24.Such reflection or the operation that sees through are because the difference of the set position of laser diode difference to some extent.
Described finder lens 24 becomes directional light with the Beam Transformation of incident, utilize catoptron 25 that beam path is turned to the CD direction after, rely on object lens 26 to shine CD 27.After the light beam that shines described CD 27 is reflected through contrary path, that is, object lens 26 and catoptron 25, and finder lens 24 see through photo- fission device 23,21,22, owing in photodetector 30, detect electric signal, be used with the form of servomechanism signal and RF (radiofrequency signal) signal.
Thus, if will use separately the laser diode 11,12,13 that is provided with respectively to constitute and the corresponding optical devices of 3 wavelength, owing to need a large amount of opticses, so among the laser diode of 2 wavelength developing.
Fig. 2 is provided with two laser diodes for existing 3 long wavelength laser diode bags in a light-emitting component 41, can produce CD with laser beam and DVD laser beam, at under-filled the 2nd light-emitting component 42 of described transmitting element 41, produces the BD laser beam.In view of the above, from Fig. 1, suitable optical element in two photo-fission devices can be removed, can be applied in a flexible way in its space.
Fig. 3 is another pie graph of existing 3 long wavelength laser diodes, and three light- emitting components 43,44,45 by horizontal can produce CD usefulness, DVD usefulness, BD laser beam.
But, even use existing 3 long wavelength laser diode bags, also can exist two adjacent laser diodes to be placed on the straight line, shortening its spacing from limited aspect (100um), the thermalization characteristic that also causes temperature characterisitic lowly to reach LD becomes poor problem.
Summary of the invention
The present invention is in order to solve the described problem that prior art exists, and a kind of integrated optical component that provides and the optical take-up apparatus that utilizes these parts.
First purpose of the present invention is, the photodetector that produces three laser diodes of 3 wavelength and receive light can be integrated into parts.
Second purpose of the present invention is, integrated optical component is possessed the reflecting body of isogonism dip plane is arranged and become one at three laser diodes on each dip plane and the photodetector between described isogonism, so the relative distance between laser diode can be dwindled, the quantity of optical element also can reduce.
The 3rd purpose of the present invention is that owing to the hologram that is provided with on the optics, so light beam can be guided to required direction, photodetector can receive the reflected light light beam.
In order to realize described purpose, integrated optical component of the present invention is characterized in that comprising following components:
Have three reflecting bodys that become the dip plane of isogonism formation;
Three laser diodes on described each dip plane relative direction;
Disposing photodetector between described two dip plane and between two laser diodes;
Support the scanning transmission electron microscope of described laser diode and photodetector.
Specifically, the dip plane of described reflecting body becomes miter angle to tilt respectively with prism bottom surface standard and luminous optical axis.
Specifically, described reflecting body is to form with pyramid.
Specifically, the dip plane of described reflecting body is space 120 degree.
Specifically, also be included in the top of reflecting body, on the path of light, see through and penetrate, the hologram of the described photodetector of folded light beam directive that will reflect from CD by each dip plane reflected beams.
Specifically, described light reflector is mirror lens or catoptron.
Utilize the optical take-up apparatus of integrated optical component among the present invention among another embodiment, be characterized in, comprise first to the 3rd laser diode that produces the mutually different light beam of wavelength according to the kind of CD, and the received folded light beam that between two laser diodes, disposes and detect the photodetector of electric signal, with relative with described three laser diode directions on each dip plane, the reflecting body of folded light beam is at interior integrated optical component;
Be arranged at the top of described integrated optical component, it seen through and the hologram of diffraction according to the polarization direction of light beam;
The Beam Transformation that will penetrate from described integrated optical component is the conversion means of parallel beam; Described parallel beam path is transformed into path conversion means on the CD direction;
Rely on described light path conversion means the light beam that is converted to be gathered in the object lens of CD.
Specifically, above-mentioned described hologram is characterized in: for light beam being seen through and diffraction, be made of sparse diffraction field and fine and close diffraction field.
Among the present invention, circular scanning transmission electron microscope middle position, be provided with and possess the reflecting body that three dip plane are similar to prism or catoptron, produce around the reflecting body of three laser diodes of the different light beam of wavelength and photodetector is arranged on this reflecting body as package dip plane relative direction, make in the parts and can produce three light beams, and can receive folded light beam, when simplifying the formation of optical take-up apparatus with this, its volume also can reach and minimize.
Description of drawings
Further describe concrete characteristic performance of the present invention below in conjunction with accompanying drawing.
Fig. 1 is existing optical take-up apparatus pie graph.
Fig. 2 is existing 3 wavelength diode synoptic diagram.
Fig. 3 is existing another pie graph of 3 wavelength diode.
Fig. 4 is an integrated optical component oblique view in the embodiment of the invention.
Fig. 5 is the planimetric map of Fig. 2.
Fig. 6 is integrated optical component and the simple pie graph of hologram among the present invention.
Fig. 7 is the outboard profile of integrated optical component and hologram among the present invention.
Fig. 8 is the luminous of integrated optical component of the present invention and RX path pie graph.
Fig. 9 is the detailed pie graph of hologram among the present invention.
Figure 10 is the pie graph that the light of photodetector of the present invention detects example.
Figure 11 is the optical take-up apparatus pie graph that utilizes integrated optical component among the present invention.
Figure 12 is the relative distance comparison diagram of the laser diode of integrated optical component among the present invention.
Figure 13 is the aberration characteristic pattern of the relative distance of laser diode among the present invention.
The symbol description of major part in the accompanying drawing:
100: integrated optical component 101,102,103: laser diode
104: scanning transmission electron microscope 110: reflecting body
111,112,113: dip plane 130: photodetector
140: hologram 151: finder lens
152: catoptron 153: object lens
154: CD
Embodiment
With reference to Fig. 4 and Fig. 5, Fig. 4 and Fig. 5 are the oblique view and the planimetric map of integrated optical component of the present invention.Integrated optical component (or module) 100 comprises the scanning transmission electron microscope 104 of rounded or annular, first to the 3rd laser diodes 101,102,103 of interval 120 degree on the described scanning transmission electron microscope 104, in scanning transmission electron microscope 104 central authorities, with the reflecting body 110 of the dip plane 111,112,113 that becomes the isogonism configuration on described first to the 3rd laser diode, 101,102,103 relative directions.
Here, reflecting body 110 is made up of catoptron (Mirror) or prism (Prism) etc. is attached with reflectance coating on the dip plane structure.
This kind integrated optical component 100, as shown in Figure 4 and Figure 5, on the scanning transmission electron microscope 104 of circle or annular, dispose 101,103 of 101,102,103, two laser diodes of first to the 3rd laser diode (LD1, LD2, LD3) respectively with isogonism (120 degree) and be respectively arranged with photodetector 130.
Here, scanning transmission electron microscope 104 also can be divided into three, installs respectively to refill behind first, second, third laser diode 101,102,103 and joins use.That is, be equipped with after the scanning transmission electron microscope of a laser diode 101,102,103 owing to make respectively, with the structure of circle attached to around the reflecting body 110, so can make the laser diode and the photodetector of 3 wavelength.
Described first to the 3rd laser diode 101,102,103 is configured in respectively at interval with trisection on the relative direction of dip plane 111,112,113 of reflecting body 110.Relative with the optical axis formation tilt stand that has a certain degree with scanning transmission electron microscope 104 bottom surface standards in the dip plane 111,112,113 of described reflecting body 110 for example, can be made the tilt stand of 45 degree.Here, described dip plane the 111,112, the 113rd, its angle of inclination can be narrow slightly or wideer slightly.Like this, between the light beam that from mutually different laser diode 101,102,103, produces every relying on the angle of dip plane adjust.
Described reflecting body 110 each dip plane 111,112,113 are pyramid apart from one another by 120 degree.Described photodetector 130 is set between the dip plane of reflecting body 110, that is, and and on the corner angle relative position.
The mutually different light beam of wavelength that described first to the 3rd laser diode 101,102,103 produces is reflected respectively on first to the 3rd dip plane 111,112,113 of reflecting body 110, and the direction that meets at right angles along the surface with scanning transmission electron microscope 104 is propagated.The mutually different laser beam of the wavelength of Chuan Boing can be used to the record and the broadcast of two kinds of CDs like this.
Here, the 1st light source that is used in first laser diode (LD1) 101, such as the laser diode of irradiation 780nm wavelength light beam is used to the CD CD.The 2nd light source that produces in second laser diode (LD2) 102, such as the CD of irradiation 680nm wavelength light beam is used to the DVD CD with laser diode.In addition, the 3rd light source that is used in the 3rd laser diode 103, such as irradiation 405nm wavelength light beam be the blue laser diode.
In addition, the folded light beam that is reflected out from CD is owing to rely on hologram once more, be gathered on the photodetector 130 that is arranged on 101,103 of the first and the 3rd laser diodes, so in photodetector 130, detect electric signal, be used with the form of servomechanism signal and RF (radiofrequency signal) signal.
Fig. 6 to Fig. 8 is the pie graph that hologram 140 is set on the top of integrated optical component 100.
At first, with reference to Fig. 6 and Fig. 7, be equipped with the hologram (HOLOGRAM) 140 of light beam to certain target location transmission on the top of integrated optical component 100.
As Fig. 8, laser beam B1, B2, the B3 that produces from first to the 3rd laser diode 101,102,103 meets at right angles in first to the 3rd dip plane 111,112,113 of reflecting body 110 and is reflected respectively and sees through hologram 140, penetrates on light path.Described transmitted light beam reads dual CD through light path.In addition, the folded light beam another mistake path that reflects from described CD is by hologram 140 transmissions.At this moment, folded light beam accumulates on the photodetector 130 through hologram 140.
That is, hologram 140 will come out and the folded light beam of contrary path incident directly propagates on the photodetector 130 without the dip plane from CD reflection, needn't adjust separately so light picks up again, and can remain on plateau.
For this reason, hologram 140 as shown in Figure 9, is made of sparse diffraction field 142 and fine and close diffraction field 141.That is, hologram 140 is formed by being carved with the diffraction field that laterally reaches oblique diffraction grid.This diffraction field is divided into sparse field 142 and fine and close field 141, according to polarization direction light beam is seen through or diffraction.
With reference to Figure 10, Figure 10 is the pie graph of hologram 140 among the present invention and photodetector 130.The folded light beam that sees through hologram 140 is assembled on 4 segmenting structure unit C1 that photodetector 130 possesses, C2, C3, C4.Described photodetector 130 receives the folded light beam that sees through hologram 140, receives main light beam and auxiliary beam by 4 segmenting structure unit C1, C2, C3, C4, owing to detect electric signal, so can detect servomechanism signal and RF radiofrequency signal.
With reference to Figure 11, Figure 11 is the pie graph that utilizes the optical take-up apparatus of integrated optical component of the present invention.Described optical take-up apparatus comprises following components: penetrate the mutually different laser beam B1 of wavelength, B2, B3 and receive the integrated optical component 100 of folded light beam; To be converted to the finder lens 151 of parallel beam from the laser beam that described integrated optical component 100 produces; Described parallel beam is transformed into catoptron 152 on the CD direction as the light path conversion means; And with the object lens 153 of the described laser beam irradiation that is reflected to the CD 154.
This kind utilizes the optical take-up apparatus of optics, at first to from integrated optical component 100, produce the mutually different light beam B1 of wavelength, B2, B3 respectively, rely on finder lens 151 to be converted to parallel beam, after catoptron 152 is transformed into light path on the CD direction, shine on the CD 154 by object lens 153.And, pass through contrary path again from the folded light beam that CD 154 reflects, that is, object lens 153, catoptron 152, finder lens 151 are received on the photodetector 130 of integrated optical component.
Figure 12 is the interval and the existing synoptic diagram that compares at interval between laser diode LD 1 of the present invention, LD3.Between first and second light beam B1 ', the B3 ' that produces in existing first and second laser diode LD 1, LD3 is separated with certain distance (d3, about 100um).
In contrast, in the present invention, the distance maintaining between the 3rd light beam B3 that produces in first light beam B1 that produces in first laser diode (LD1) 101 and the 3rd laser diode (LD3) 103 is than existing little at interval degree (the about 50um of d2).And under the littler situation in the angle of inclination of the dip plane of reflecting body 110, according to image point, (distance between B1, B3 ") (the about 30um of d3) also can narrow down relative light beam.In addition, the position of laser diode is installed on the higher position of relative reflecting body 110, makes that the distance between light beam can narrow down.
In addition, among the present invention,, all can do certain adjustment with the relative distance between three laser diodes of isogonism configuration along with the adjustment of the angle of each dip plane of reflecting body 110.
Figure 13 is the coordinate diagram that concerns according to the image height of the distance between laser diode and aberration (RSM).Here, image height is the distance of first laser diode LD 1 and second laser diode LD 2, among the present invention, is the value of the distance C between distance A, B and the existing light beam between the comparison light beam.As shown in the figure, the distance between the light beam of first laser diode LD 1 and second laser diode LD 2 uses 30um, 50um to represent, existing distance represents that with 100um the big I of relative aberration separately is expressed as A＞B＞C.
Here, the difference of aberration is big more, in pick-up, just can have problems more, and the first, owing to produce relative inclination, be certain to occur adjusting the problem and the trickle crooked situation at inclination angle.The second, use under the situation of a photodetector, received light beam can produce relative error.The present invention can solve similar problem.
More than the comparatively desirable embodiment of the present invention is illustrated.By described explanation, those skilled in the art can carry out various change and modification fully in the scope that does not depart from the technology of the present invention thought.In addition, this change should be included in the technical scope of claims defined of the present invention with the relevant gap of application.
The technique effect that the present invention produces is obvious:
In the optical take-up apparatus in the present invention, with regard to integrated optical component and utilize the light of these parts to pick up dress Put, will be provided with into the reflector on the inclined plane of isogonism configuration, therewith three laser on the relative direction Diode and photodetector constitute optics with a package, so according to the reality of photodetector Situation, pick-up needn't be adjusted separately, namely can realize the effect of stable state.
And, because three laser diodes integrated, can reduce the quantity of optics, receive and fall The effect of low price.
Improve simultaneously the relative distance between laser diode, can reach and eliminate because existing relative distance The effect of the aberration that the inclined shaft that produces causes.
And, can reach the effect of the whole height step-down of pick-up.
Claims (8)
1. an integrated optical component is characterized in that, comprises following several sections:
Have three reflecting bodys that become the dip plane of isogonism formation;
Three laser diodes on described each dip plane relative direction;
Reaching the photodetector that disposes between two laser diodes between described two dip plane;
Support the scanning transmission electron microscope of described laser diode and photodetector.
2. integrated optical component as claimed in claim 1 is characterized in that,
The dip plane of described reflecting body becomes miter angle to tilt respectively with prism bottom surface standard or luminous optical axis.
3. integrated optical component as claimed in claim 1 is characterized in that,
The profile of described reflecting body is pyramid.
4. integrated optical component as claimed in claim 1 is characterized in that,
Space, dip plane 120 degree of described reflecting body.
5. integrated optical component as claimed in claim 1 is characterized in that,
Also be included in the top of described reflecting body, on the path of light, see through and penetrate, will gather the hologram on the described photodetector from the folded light beam that CD reflects by each dip plane reflected beams.
6. integrated optical component as claimed in claim 1 is characterized in that,
Described reflecting body is reflecting prism or is catoptron.
7. utilize the optical take-up apparatus of integrated optical component, it is characterized in that, comprise following several sections:
Comprise first to the 3rd laser diode that produces the mutually different light beam of wavelength according to the kind of CD, and the received folded light beam that between two laser diodes, disposes and detect the photodetector of electric signal, and on each dip plane with the reflecting body of relative, the folded light beam of described three laser diode directions at interior integrated optical component;
Be arranged at the top of described integrated optical component, it seen through and the hologram of diffraction according to the polarization direction of light beam;
The Beam Transformation that will penetrate from described integrated optical component is the conversion means of parallel beam; Described parallel beam path is transformed into path conversion means on the CD direction;
Rely on described light path conversion means the light beam that is converted to be gathered in the object lens of CD.
8. the light of integrated optical component that utilizes as claimed in claim 7 picks up, it is characterized in that,
Described hologram sees through and diffraction in order to make light beam, is made of sparse diffraction field and fine and close diffraction field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100290550A CN101110232A (en) | 2006-07-18 | 2006-07-18 | Integrated optical component and optical pick-up apparatus using this component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100290550A CN101110232A (en) | 2006-07-18 | 2006-07-18 | Integrated optical component and optical pick-up apparatus using this component |
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| CN101110232A true CN101110232A (en) | 2008-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006100290550A Pending CN101110232A (en) | 2006-07-18 | 2006-07-18 | Integrated optical component and optical pick-up apparatus using this component |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540481A (en) * | 2012-02-10 | 2012-07-04 | 上海理工大学 | Multi-focus beam focus separating device and method |
| CN104597450A (en) * | 2014-12-22 | 2015-05-06 | 上海建工集团股份有限公司 | Three-dimensional reflecting measurement device and method |
| CN108628074A (en) * | 2018-05-08 | 2018-10-09 | 青岛海信激光显示股份有限公司 | The control method and projection device of a kind of light supply apparatus, light supply apparatus |
| CN112230315A (en) * | 2020-12-10 | 2021-01-15 | 武汉乾希科技有限公司 | Mirror group, method for growing mirror group, optical device and optical system |
-
2006
- 2006-07-18 CN CNA2006100290550A patent/CN101110232A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540481A (en) * | 2012-02-10 | 2012-07-04 | 上海理工大学 | Multi-focus beam focus separating device and method |
| CN104597450A (en) * | 2014-12-22 | 2015-05-06 | 上海建工集团股份有限公司 | Three-dimensional reflecting measurement device and method |
| CN108628074A (en) * | 2018-05-08 | 2018-10-09 | 青岛海信激光显示股份有限公司 | The control method and projection device of a kind of light supply apparatus, light supply apparatus |
| CN112230315A (en) * | 2020-12-10 | 2021-01-15 | 武汉乾希科技有限公司 | Mirror group, method for growing mirror group, optical device and optical system |
| CN112230315B (en) * | 2020-12-10 | 2021-03-09 | 武汉乾希科技有限公司 | Mirror group, method for growing mirror group, optical device and optical system |
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