CN101025952B - Optical pickup device - Google Patents
Optical pickup device Download PDFInfo
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- CN101025952B CN101025952B CN2006101723643A CN200610172364A CN101025952B CN 101025952 B CN101025952 B CN 101025952B CN 2006101723643 A CN2006101723643 A CN 2006101723643A CN 200610172364 A CN200610172364 A CN 200610172364A CN 101025952 B CN101025952 B CN 101025952B
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Abstract
An optical pickup device is provided, in which, supposing that an angle formed by the meeting of a straight line connecting a center of an optical disk and an accessing position of an HD objective lens with a diameter L of the optical disk is a track angle theta 1 , an oscillation angle alpha of an optical system including an HD laser, an HD half mirror, and an HD sensor, and a distance z of the HD objective lens are set so as to satisfy alpha-(theta 1 max+theta 1 min)/2=+-45 DEG , where theta 1 max is the track angle theta 1 when the HD objective lens is positioned at an innermost circumference of the optical disk, and theta1 min is the track angle theta 1 when the HD objective lens is positioned at an outermost circumference of the optical disk.
Description
Technical field
The present invention relates to optical pickup apparatus and set the layout method of its optical system, be specially adapted to launch the exchange type optical pickup apparatus and the layout setting method thereof of the laser of a plurality of wavelength.
Background technology
Be accompanied by the high capacity of CD, people efforts be made so that the exploitation with the HD DVD (High Definition Digital Versatile Disc) of the laser of blue wavelength.At present, just be applicable to the exchange type optical pickup apparatus of this HD DVD and existing DVD at active development.
In this exchange type optical pickup apparatus, for example the WO97/426311 communique is described, and employing is disposed the structure of object lens separately respectively to HD DVD laser and DVD laser.Therefore, 2 object lens can dispose side by side in the direction with the cd diameter quadrature.At this moment, make object lens after moving on the cd diameter, another object lens move with this diameter abreast just in the position apart from the certain distance of this diameter.So, just as described below, the relation of another object lens and orbital direction changes along with moving of object lens.
Figure 16 A, B be described two object lens of expression when the cd diameter direction moves, the figure of the orbital direction angle in each shift position.
In Figure 16 A, in two object lens one moves on the O-Y line (the normal amount of staggering=0), and another distance at distance O-Y line is the position of Z, with the O-Y line parallel move (the normal amount of staggering=Z).At this moment, suppose that the orbital direction angle is the θ 2 of Figure 16 A (track tangent line and the angle that constitutes with the line of OX line parallel), between the addendum modification of object lens and track angle, just exist the sort of relation shown in Figure 16 B.In addition, Figure 16 B is the situation during as 5mm with the normal amount of staggering.
As shown in the figure, when object lens did not stagger with normal, track angle θ 2 was irrelevant with the shift position of object lens, becomes zero all the time.Different therewith, after object lens and normal staggered, as shown in the figure, track angle θ 2 changed with regard to being accompanied by moving of object lens.After track angle θ 2 changed like this, the orbital direction on the optical detector was also along with it changes.Therefore, exist orbital direction rotation for the cut-off rule of sensor patterns, can not generate the problem of suitable push-pull signal.
In addition, in Figure 16 A, track angle θ 2 satisfies the relation of θ 2=θ 1.In other words, the track angle can also be as θ 1 expression.
But, in this optical pickup apparatus, as shown in figure 17, can adopt flat semi-transparent semi-reflecting lens is inserted the optical system that gives angle of oscillation α, utilize the refraction action of semi-transparent semi-reflecting lens, obtain astigmatism is imported the structure of laser.Like this, the optical system compactness can be made, and number of components can be reduced.
, at this moment,, often angle of oscillation α can not be set for ± 45 ° owing to arrange the relation of optics.At this moment, the orbital direction on the optical detector for the deformation direction of the light beam spot that causes for astigmatism, just can not become 45 ° direction.Therefore, appearance can not be cut apart sensor configuration to making focus error signal and tracking error signal (push-pull signal) both become the problem of suitable position with 4.
In other words, after making cut-off rule become 45 ° of ground configurations 4 for the deformation direction of light beam spot to cut apart sensor, the orbital direction on the sensor just favours the cut-off rule of sensor patterns.Otherwise after the cut-off rule that makes sensor patterns was cut apart sensor along orbital direction ground configuration 4, this cut-off rule just can not become 45 ° for the deformation direction of light beam spot.
And then as mentioned above, after producing normal stagger in object lens, under the effect of direction that normal staggers and even size, the deformation direction of the light beam spot that astigmatism causes and the relation of orbital direction further worsen sometimes.At this moment, with the cut-off rule of sensor patterns be adjusted to be suitable for the detecting of astigmatism after, just occur generating suitable push-pull signal, can not successfully carry out the problem of tracking Control.
Summary of the invention
Purpose of the present invention even be to provide as mentioned above, occurs finding the normal dislocation on object lens, also the cut-off rule direction of sensor pattern and the dislocation between the orbital direction can be suppressed to minimal optical pickup apparatus.
In addition, even the present invention also will provide as mentioned above, orbital direction on optical detector, for the deformation direction of the light beam spot that causes for astigmatism, in the time of can not becoming 45 ° direction, also can generate satisfactorily focus error signal and tracking error signal both optical pickup apparatus and layout setting method as problem.
The 1st form of the present invention is by adjusting the above-mentioned normal amount of staggering Z and angle of oscillation α, thereby makes both optimized optical pickup apparatus of focus error signal and tracking error signal.
The optical pickup apparatus that this form relates to possesses: semiconductor laser; The 1st object lens, the 1st object lens are configured in the laser focusing that will be penetrated by described semiconductor laser to the CD the time, also on the in-plane of described CD, be the position of Z to the distance of the diameter L of the described CD parallel with the moving direction of this optical pickup apparatus; Optical detector, this optical detector has the sensor patterns that is divided into 4 zones with 2 cut-off rules of quadrature in the described laser that receives by described CD reflection; Flat optics, the described laser that this optics is penetrated by described semiconductor laser in reflection when it is imported a side of described the 1st object lens, also sees through the described laser by described CD reflection, and it is imported a side of described optical detector.And then, in this optical pickup apparatus, adjust described angle of oscillation α and described apart from Z, and make in 2 cut-off rules of described sensor patterns one, roughly become 45 ° straight line coupling with the importing direction of astigmatism (astigmatism), so that reflected by described optics, and be imported into the optical axis of described laser of a side of described the 1st object lens, for for the described diameter L-orthogonal of described CD and the straight line parallel with the in-plane of described CD, during only towards the in-plane wallowing motion angle α of described CD, make the orbital direction of the described CD in the described optical detector, the importing direction of the described astigmatism that causes with described optics roughly becomes 45 ° angle.
In the optical pickup apparatus that the 1st form relates to, described angle of oscillation α and described apart from Z, during as θ 1min, be configured to satisfy as track angle θ 1, track angle θ 1 with the track angle θ 1 of described the 1st object lens when interior all position of described CD during at angle that the straight line and the described diameter L of the access site of center that will connect described CD and described the 1st object lens constitute as θ 1max, with the most peripheral position of described the 1st object lens at described CD
α-(θ1max+θ1min)/2＝±45°。
Below, as embodiment 1 and embodiment 2, express the working of an invention mode that the 1st form relates to.The effect of the invention that the 1st form relates to can further be understood by the checking of embodiment 1 and embodiment 2.
The 2nd form of the present invention is to cut apart the cut-off rule direction of sensor by adjusting to receive from catoptrical 4 of CD, thereby makes both optimized optical pickup apparatus of focus error signal and tracking error signal.
The optical pickup apparatus that this form relates to possesses: semiconductor laser; Object lens, these object lens make laser focusing from described semiconductor laser to CD; Optical detector, this optical detector has the sensor patterns that is divided into 4 zones with 2 cut-off rules of quadrature in the described laser that receives by described CD reflection; Flat optics, the described laser that this optics is penetrated by described semiconductor laser in reflection when it is imported a side of described object lens, also sees through the described laser by described CD reflection, and it is imported a side of described optical detector.And then, in this optical pickup apparatus, dispose described sensor patterns, so that the orbital direction of the described CD on described optical detector, when the deformation direction of the light beam spot that causes with the astigmatism of described optics can not become 45 ° angle, make in 2 cut-off rules of described sensor patterns, in the 1st direction consistent with described orbital direction, become in 45 ° the 2nd direction of angle more close described the 2nd direction with deformation direction with described light beam spot.
The 3rd form of the present invention is to cut apart the cut-off rule direction of sensor by adjusting to receive from catoptrical 4 of CD, thereby makes the layout setting method of both optimized optical pickup apparatus of focus error signal and tracking error signal.
The layout setting method that this form relates to, be optical pickup apparatus as being intended to generate according to the focus error signal of Astigmatism methord with according to the tracking error signal structure of the method for recommending, possess and have the layout setting method of optical detector that is divided into the sensor patterns in 4 zones by two cut-off rules with quadrature, in this layout setting method, set the configuration of described sensor patterns, so that the orbital direction of the recording medium that on described optical detector, is projected, for the deformation direction of the beam spot that effect causes for astigmatism, in the time of can not becoming 45 ° angle, make in two cut-off rules of described sensor patterns, in 1st direction consistent with described orbital direction, with for the deformation direction of described beam spot, become in 45 ° the 2nd direction of angle more approaching described the 2nd direction.
Below, as embodiment 3,4 and 5, express the working of an invention mode that the 2nd and the 3rd form relates to.The effect of the invention that the 2nd and the 3rd form relates to can further be understood by the checking among the embodiment 3,4 and 5.
Description of drawings
Telling about of the embodiment shown below of the accompanying drawing that the reading reference is following can more fully be understood described and other purpose and brand-new feature of the present invention.
Figure 1A and B illustrate the optical system of the optical pickup unit that embodiment relates to, and wherein, Figure 1A is the vertical view of optical system; Figure 1B is the side view (synoptic diagram) of optical system.
Fig. 2 is the figure of the relation of the expression object lens that relate to of embodiment and CD.
Fig. 3 A～C is the figure of the HD that relates to of expression embodiment with the state of the light beam spot on the sensor, and wherein, Fig. 3 A focuses on synoptic diagram; Fig. 3 B, Fig. 3 C follow the tracks of synoptic diagram.
Fig. 4 A and B illustrate the optical system of the optical pickup unit that embodiment 1 relates to, and wherein, Fig. 4 A is the vertical view of optical system; Fig. 4 B is the side view (synoptic diagram) of optical system.
Fig. 5 A and B are the figures of telling about the verification condition among the embodiment 1, and wherein, Fig. 5 A shows the CD parameter; Fig. 5 B shows sensor parameters.
Fig. 6 A～D is a figure of telling about the verification condition among the embodiment 1.
Fig. 7 A and B are the figures of telling about the verification condition among the embodiment 1.
Fig. 8 is a figure of telling about the verification condition among the embodiment 1.
Fig. 9 is the checking result's of the comparative example among the expression embodiment 1 a figure.
Figure 10 is the figure of checking result among the expression embodiment 1.
Figure 11 A and B illustrate the optical system of the optical pickup unit that embodiment 2 relates to, and wherein, Figure 11 A is the vertical view of optical system; Figure 11 B is the side view (synoptic diagram) of optical system.
Figure 12 is the figure of the checking result among the expression embodiment 2.
Figure 13 is the figure of the checking result among the expression embodiment 3.
Figure 14 is a figure of telling about the optical system of the optical pickup unit that embodiment 4,5 relates to.
Figure 15 A and B illustrate the optical system of the optical pickup unit that embodiment 4,5 relates to.
Figure 16 A and B are the figures of the problem when telling about object lens generation normal and staggering, and wherein, Figure 16 A shows that normal staggers and the track angle; Figure 16 B shows that normal staggers and the variation of track angle.
Figure 17 is the structure example of the optical system of expression.
Embodiment
Below, with reference to accompanying drawing, tell about the embodiment that the present invention relates to.Present embodiment is in the exchange type optical pickup apparatus of HDDVD and DVD, uses the present invention.
At first, Figure 1A and B illustrate the basic structure of optical system.In addition, in these figure,, also express spindle drive motor 200 in the lump for for simplicity.This optical system, be divided into to the HDDVD irradiating laser optical system (HD optical system) and to the optical system (DVD optical system) of DVD irradiating laser.
The HD optical system is made of with sensor 16 with object lens 15 and HD with collimation lens 14, HD with rising catoptron 13, HD with semi-transparent semi-reflecting lens 12, HD with laser instrument 11, HD HD.
Here, HD is formed by the flat glass material with certain thickness with semi-transparent semi-reflecting lens 12, in two parallel planes, on the plane with rising catoptron 13 1 sides, is forming semi-transparent semi-reflecting minute surface with laser instrument 11 and HD near HD.HD is configured to semi-transparent semi-reflecting lens 12 tilt towards the direction parallel with card with certain angle for the optical axis of the rising catoptron 13 of laser inject with to(for) HD.Therefore, in the laser of HD, see through the laser of HD, under the refraction action that sees through when HD uses semi-transparent semi-reflecting lens 12, be imported into astigmatism with semi-transparent semi-reflecting lens 12 with rising catoptron 13.In addition, in the present embodiment,, generate the focus error signal that HDDVD uses according to Astigmatism methord.
HD will reflex to the direction of HD with collimation lens 14 by HD with semi-transparent semi-reflecting lens 12 laser light reflected with rising catoptron 13.HD will be transformed into directional light by HD with semi-transparent semi-reflecting lens 12 laser light reflected with collimation lens 14.HD makes the laser with collimation lens 14 from HD with object lens 15, focuses on the dish 100.
HD receives and sees through the laser (from the reflected light of dish 10) of HD with semi-transparent semi-reflecting lens 12 with sensor 16.With in sensor 16, disposing the sensor patterns (4 cut apart sensor) that two cut-off rules use quadrature are divided into 4 zones at this HD,, and recommending method generation tracking error signal with 1 wave beam so that generate focus error signal with Astigmatism methord.
In addition, the DVD optical system is made of with sensor 27 with object lens 26 and DVD with collimation lens 25, DVD with rising catoptron 24, DVD with semi-transparent semi-reflecting lens 23, DVD with diffraction lattice 22, DVD with laser instrument 21, DVD DVD.
Here, DVD is formed by the flat glass material with certain thickness with semi-transparent semi-reflecting lens 23, in two parallel planes, on the plane with rising catoptron 24 1 sides, is forming semi-transparent semi-reflecting minute surface with diffraction lattice 22 and DVD near DVD.DVD is configured to semi-transparent semi-reflecting lens 23 tilt towards the direction parallel with card with certain angle for the optical axis of the rising catoptron 24 of laser inject with to(for) DVD.Therefore, in the laser of DVD, use semi-transparent semi-reflecting lens 23 backs towards the laser of DVD, under the refraction action that sees through when DVD uses semi-transparent semi-reflecting lens 23, be imported into astigmatism with sensor 27 through DVD with rising catoptron 24.In addition, in the present embodiment,, generate the focus error signal that DVD uses according to Astigmatism methord.
DVD will reflex to the direction of DVD with collimation lens 25 by DVD with semi-transparent semi-reflecting lens 23 laser light reflected with rising catoptron 24.DVD will be transformed into directional light by DVD with rising catoptron 24 laser light reflected with collimation lens 25.DVD makes the laser with collimation lens 25 from DVD with object lens 26, focuses on the dish 100.
DVD receives and sees through the laser (from the reflected light of dish 10) of DVD with semi-transparent semi-reflecting lens 23 with sensor 27.With in the sensor 27, disposing sensor patterns at this DVD,, and generating tracking error signal with the differential method of recommending so that can generate focus error signal by enough Astigmatism methords.In other words, in order to receive main beam, disposing the sensor patterns (4 cut apart sensor) that two cut-off rules using quadrature are divided into 4 zones, and then, in order to receive two side beams, disposing 2 two pairs of sensor patterns cutting apart.
Common actuator movable part 30 is installed with HD object lens 15 and DVD object lens 26.Here, these two object lens with the direction of cd diameter quadrature on, be installed on the actuator movable part 30 across certain distance mutually with arranging.Actuator movable part 30 is driven towards tracking direction and focus direction by object lens activator 31.Like this, do media by object lens activator 31, after HD was applied in focus servo and tracking servo with object lens 15 and DVD with some in the object lens 26, another object lens also were accompanied by the object lens of controlling object, are driven towards focus direction and tracking direction.In addition, object lens activator 31 can adopt well-known structure.
Fig. 2 is the figure of the relation of expression object lens and CD.As mentioned above, in the present embodiment, in above-mentioned 2 two object lens, DVD is configured to go up at cd diameter (representing with dot-and-dash line L1 among the figure) mobile with object lens 26.Like this, HD just go up to move with the stagger straight line (representing with dot-and-dash line L2 among the figure) of certain distance of this cd diameter L1 with object lens 15.
Fig. 3 A, B, C are the figure of expression HD with the state of the light beam spot on the sensor 16.
With reference to Fig. 3 A, with after producing focusing error in the object lens 15, HD is with the light beam spot on the sensor 16, just under the astigmatism effect that HD causes with semi-transparent semi-reflecting lens 12, towards direction parallel with card and the direction distortion vertical with it at HD.Like this,, as shown in the figure, set Φ=45 ° for, so just can suitably carry out detecting according to the focusing error of Astigmatism methord if HD is cut apart 1 cut-off rule of sensor and the angle Φ between the disc plane direction with 4 of sensor 16 configuration.
With reference to Fig. 3 B, by the angle Φ between the orbital direction of light beam spot projection and the disc plane direction, when track angle θ 1 shown in Figure 2 becomes minimum (θ 1min), when promptly HD is positioned at CD most peripheral position with object lens 15, become maximum on the HD usefulness sensor 16.If general angle Φ at this moment just can obtain Φ max by following formula as Φ max.
Φmax＝α-θ1min …(1)
Equally, angle Φ as shown in Figure 3, when track angle θ 1 became maximum (θ 1max), promptly HD was positioned at CD during all positions with object lens 15, becomes minimum.If general angle Φ at this moment just can obtain Φ min by following formula as Φ min.
Φmin＝α-θ1max …(2)
Like this, the angle Φ between orbital direction and the disc plane direction, till HD moves to the most peripheral position with object lens 15 from interior all positions of CD during, in the scope of Φ min≤Φ≤Φ max, change.
In order suitably to generate tracking error signal (push-pull signal), it is consistent to make orbital direction and 4 cut apart 1 cut-off rule of sensor.Like this, just as shown in Figure 3A, detect in order suitably to carry out focus error signal, when 4 cut apart 1 cut-off rule of sensor and the angle Φ between the disc plane direction and are configured to Φ=45 °, after setting the angle Φ between orbital direction and the disc plane direction for Φ=± 45 °, just can suitably generate tracking error signal (push-pull signal).
As mentioned above, angle Φ is accompanied by HD and uses moving of object lens 15, changes in the scope of Φ min≤Φ≤Φ max.Therefore, can not be in object lens position arbitrarily, set angle Φ for Φ=± 45 °.
At this moment, if set Φ min=± 45 ° for, so HD with object lens 15 when move the most peripheral position, the staggered angle of the orbital direction for 4 cut-off rules of cutting apart sensor will become greatly, the tracking servo deterioration in characteristics.Otherwise, if set Φ max=± 45 ° for, so HD with object lens 15 when move interior all positions, the staggered angle of the orbital direction for 4 cut-off rules of cutting apart sensor will become greatly, the tracking servo deterioration in characteristics.
Different therewith, if make the intermediate angle Φ avc of Φ min and Φ max, promptly
Φave＝α-(θ1max+θ1min)/2 …(3)
° consistent with Φ=45, so HD with object lens 15 when move interior all positions or most peripheral position, the staggered angle of the orbital direction for 4 cut-off rules of cutting apart sensor is just compared with above-mentioned situation, is inhibited.Like this, set Φ ave=± 45 ° for after, can suppress the deterioration of tracking servo characteristic.
In sum, set Φ ave=± 45 ° for after, can carry out successfully that focusing error according to Astigmatism methord detects and detect according to the tracking error that 1 wave beam is recommended method.In other words, the optical system shown in Figure 1A and the B when meeting the following conditions, can be derived suitable focus error signal and tracking error signal.
Φave＝α-(θ1max+θ1min)/2＝±45° …(4)
Like this, after satisfying above-mentioned formula and setting angle of oscillation α and track angle Φ 1max, Φ 1min (4) for, just can form the optical system of deriving suitable focus error signal and tracking error signal.Here, the enough HD of energy adjust track angle Φ 1max and Φ 1min with the normal amount of the staggering Z of object lens 15.Like this, make angle of oscillation α and the normal amount of staggering Z satisfy formula and adjust HD (4), just can derive suitable focus error signal and tracking error signal with after the configuration of optical system.
Below, be set forth in the optical system of Figure 1A and B the concrete configuration example when setting angle of oscillation α and track angle Φ 1max, the Φ 1min (the normal amount of staggering Z).
[embodiment 1]
Present embodiment is in the optical system of above-mentioned Figure 1A and B, when the normal amount of staggering Z is fixed into Z=5mm, obtains the appropriate value of angle of oscillation α, according to the angle of oscillation of obtaining, sets the configuration of HD with optical system.In addition, the same with the optical system shown in Figure 1A and the B in the present embodiment, HD is configured in the right side of DVD with object lens 26 with object lens 15.
When HD was 5mm with the normal amount of the staggering Z of object lens 15, with reference to Figure 16 B, the maximal value Φ 1max of track angle Φ 1 and minimum value Φ 1min became 1max=13 ° of maximal value Φ, minimum value Φ 1min=5 ° respectively.Behind the above-mentioned formula of their substitutions (4), angle of oscillation α becomes α=+ 54 ° ,-36 °.
Like this, in the present embodiment, in Fig. 2, configuration HD with laser instrument 11, HD with semi-transparent semi-reflecting lens 12 and HD with sensor 16, make angle of oscillation α become=+ 54 ° or-36 °.And then, adjust the sensor cover of HD with sensor 16, so that make HD 4 cut apart 1 cut-off rule of sensor and the angle Φ between the disc plane direction, become Φ=45 ° with what sensor 16 disposed.
In addition, on the basis of the densification of realizing optical system, when angle of oscillation α was limited in the scope of-45 °≤α≤+ 45 °, angle of oscillation α was configured to-36 °.At this moment, optical system becomes the structure shown in Fig. 4 A and the B.
Below, enumerate when angle of oscillation α is decided to be-36 ° the checking example (simulation) of the focus error signal of generation and tracking error signal.
At first, tell about imposing a condition in this checking example (setting value of parameter).
In Fig. 5 A and B, express the parameter value of the CD 100 in this checking and the parameter value that HD uses sensor 16.
Fig. 6 A expresses the generative circuit of the tracking error signal (push-pull signal) in this checking.In this structure, make the CD rotation, and after tracking servo is stopped, just generating the push-pull signal shown in Fig. 6 B.
Fig. 6 C expresses the generative circuit of the focus error signal (push-pull signal) in this checking.In this structure, make HD use object lens 15 after the focus direction displacement, just generate the focus error signal shown in Fig. 6 D.
Fig. 7 A and B express the various parameters of the HD usefulness optical system in this checking.In this checking, the various parameters among this figure are set value shown in Figure 8 respectively for.
Fig. 9 A and B represent respectively in this checking that as a comparative example HD is with the figure of optical system and analog result thereof.Shown in Fig. 9 A, in this comparative example, angle of oscillation α is set for+35 °.In this comparative example, HD is decided to be 5mm equally with the normal amount of the staggering Z and the present embodiment of object lens 15.
In addition, checking result shown in the lower end, be simulation with Φ=45 of Fig. 3 A ° as the reference position, make 4 to cut apart the PP cut-off rule shown in Fig. 6 A and C in the cut-off rule of sensor, towards near and the situation of the signal amplitude (TE amplitude) of the signal amplitude (FE amplitude) of focus error signal when leaving the direction rotation of disc plane direction of this figure and tracking error signal (push-pull signal).
The longitudinal axis of Fig. 9 B is the result who represents after the signal amplitude standardization with Fig. 6 B, D.In addition, when transverse axis is the position of expression Φ=45 ° that the PP cut-off rule shown in Fig. 6 A and the B are in Fig. 3 A as reference position (angle=0 °), to make the PP cut-off rule from this reference position, towards near the rotation of the disc plane direction of this figure the time for just, when leaving the direction rotation of disc plane direction for negative, the rotation angle when making the rotation of PP cut-off rule.
In addition, in Fig. 9 B, the TE amplitude of (when HD is positioned at the most peripheral position with object lens 15) when the TE amplitude that dots is HD with minimum value Φ 1min=5 ° of the track angle Φ 1 of object lens 15.In addition, with the TE amplitude that solid line is represented, the TE amplitude of (when HD is positioned at the most all positions with object lens 15) when being HD with maximal value Φ 1max=13 ° of the track angle Φ 1 of object lens 15.
By this analog result as can be known: the position of HD being set for Φ=45 ° with the PP cut-off rule of sensor 16, so that after making focus error signal become the best, the TE amplitude (with reference to the arrow locations of " B " in Fig. 9 B) of track angle Φ 1 when 1max=13 ° of maximal value Φ is with regard to deterioration.In other words, when HD is positioned near the most all positions with object lens 15, the tracking error signal deterioration.
In addition, can also know: the position of HD being set for Φ=45 ° with the PP cut-off rule of sensor 16, so that after making focus error signal become the best, be accompanied by track angle Φ 1 and be varied to 1max=13 ° of maximal value Φ from 1min=5 ° of minimum value Φ, the TE amplitude just Fig. 9 B in the scope of arrow locations of arrow locations～" B " of " A " in change.In other words, can know: when moving between most peripheral position～interior all positions, very big change takes place to HD in the amplitude of tracking error signal with object lens 15.Like this, according to the position of HD with object lens 15, the TE amplitude just hinders stable tracking servo after very big change takes place.
Figure 10 A and B are the figures of the checking result in the expression present embodiment.In the present embodiment, as mentioned above, set angle of oscillation α for-36 °.In addition, HD is 5mm with the normal amount of the staggering Z of object lens 15.The longitudinal axis shown in the lower end and transverse axis, situation about telling about with above-mentioned comparative example is identical.
By this analog result as can be known: the position of HD being set for Φ=45 ° with the PP cut-off rule of sensor 16, so that after making focus error signal become the best, when no matter track angle Φ 1 is in 1max=13 ° of maximal value Φ, when still being in minimum value, all equally can obtain best TE amplitude.In other words, can know that HD is positioned at any position of the most all positions～most peripheral position with object lens 15, can obtain best tracking error signal.
In addition, at this moment, the same with above-mentioned comparative example even track angle θ 1 changes from the scope of 1max=13 ° of 1min=5 °～maximal value Φ of minimum value Φ, the TE amplitude does not have very big variation yet.After adopting present embodiment,, also can generate the tracking error signal that does not have the amplitude change even HD moves between most peripheral position～interior all positions with object lens 15.Therefore, behind the employing present embodiment, can realize stable tracking servo.
Like this, adopt present embodiment after, set HD the position of 45 ° of Φ for the PP cut-off rule of sensor 16 after, just can make focus error signal and tracking error signal neither become to deterioration the state of the best.In addition, change with moving of object lens 15 even track angle θ 1 is accompanied by HD, the amplitude of tracking error signal can not keep near crest amplitude with almost changing yet.Therefore, behind the employing present embodiment, can realize stable focus servo and tracking servo.
[embodiment 2]
Present embodiment is in the optical system of above-mentioned Fig. 1, angle of oscillation α is fixed into+35 ° the time, obtain the appropriate value of HD with the normal amount of the staggering Z of object lens 15, according to the normal amount of the staggering Z that obtains, sets the configuration of HD with optical system.In addition, different with optical system shown in Figure 1 in the present embodiment, HD is configured in the left side of DVD with object lens 26 with object lens 15.
When HD used the angle of oscillation α of object lens 15 to be+35 °, according to formula (4), the maximal value Φ 1max of track angle Φ 1 and minimum value Φ 1min must satisfy the following relationship formula.
(θ1max+θ1min)/2＝-10°，+80° …(5)
Here, owing to do not have (θ 1max+ θ 1min)/2=+80 °, so the relation of maximal value Φ 1max and minimum value Φ 1min is as a result just stipulated as follows.
(θ1max+θ1min)/2＝-10° …(6)
With reference to Figure 13, because θ=Sin
-1(Z/r) (r: the distance of from the disk center to HD, using the radial location of object lens), so Φ 1max corresponding and the Φ 1min corresponding with r max=58.8mm with r min=21.9mm, when the normal amount of staggering Z=5.6mm, become Φ 1min=-14.3 °, 1max=-5.5 ° respectively.At this moment become
(θ1max+θ1min)/2＝-9.9° …(7)
Satisfy the relation of above-mentioned formula (6).
Like this, in the present embodiment, HD is configured in the left side of DVD with object lens 26 with object lens 15, so that make the normal amount of staggering Z=5.6mm.At this moment, optical system becomes the structure shown in Figure 11 A and the 11B.
Figure 12 A and B express optical system and the focus error signal that generated at that time and the checking example (simulation) of tracking error signal that constitutes according to present embodiment respectively.In addition, the longitudinal axis and the transverse axis of the checking result shown in verification condition and Figure 12 B, all the checking example with the foregoing description 1 is the same.
By the analog result shown in Figure 12 B as can be known: the position of HD being set for Φ=45 ° with the PP cut-off rule of sensor 16, so that after making focus error signal become the best, when no matter track angle Φ 1 is in maximal value Φ 1max, when still being in minimum value, all equally can obtain best TE amplitude.In other words, can know that HD is positioned at any position of the most all positions～most peripheral position with object lens 15, can obtain best tracking error signal.
In addition, at this moment, even track angle θ 1 changes from the scope of 1max=-14.3 ° of 1min=-5.5 °～maximal value Φ of minimum value Φ, the same with comparative example in the foregoing description 1, the TE amplitude does not have very big variation yet.After adopting present embodiment,, also can generate the tracking error signal that does not have the amplitude change even HD moves between most peripheral position～interior all positions with object lens 15.Therefore, behind the employing present embodiment, can realize stable tracking servo.
Like this, adopt present embodiment after, the same with the foregoing description 1, set HD the position of 45 ° of Φ for the PP cut-off rule of sensor 16 after, just can make focus error signal and tracking error signal neither become to deterioration the state of the best.In addition, change with moving of object lens 15 even track angle θ 1 is accompanied by HD, the amplitude of tracking error signal can not keep near crest amplitude with almost changing yet.Therefore, behind the employing present embodiment, can be the same with the foregoing description 1, realize stable focus servo and tracking servo.
[embodiment 3]
The foregoing description 1,2 is adjusted angle of oscillation α and the normal amount of staggering Z, so that the intermediate angle Φ ave that makes Φ min and Φ max and Φ=45 are ° consistent, thereby makes focus error signal and tracking error signal neither become to deterioration the state of the best.In other words, in these embodiments, adjust the configuration of HD,, thereby realized suitableization of focus error signal and tracking error signal so that make angle of oscillation α and the normal amount of staggering Z satisfy above-mentioned formula (4) with optical system.
Different therewith, in the present embodiment, by the direction of the PP cut-off rule shown in adjustment Fig. 6 A and the B, thus suitableization of realization focus error signal and tracking error signal.In other words, when the Φ ave that obtains in the Φ shown in Fig. 3 A=45 ° with according to above-mentioned formula (3) is internally inconsistent, adjusts 4 and cut apart the direction of the cut-off rule of sensor, thereby realize suitableization of focus error signal and tracking error signal.Present embodiment is for example because be subjected to restriction on the Design for optical system, angle of oscillation α and the normal amount of staggering Z are by predetermined fixed, thereby so can not adopt the method for the foregoing description 1,2, promptly can not be when adjusting angle of oscillation α and the normal amount of staggering Z and make the Φ=45 ° method consistent with Φ ave, very effective after the use.
Like this, in Φ=45 ° and Φ ave mutual when inconsistent, 4 cut apart the cut-off rule of sensor, can adjust in the scope of the position of the position～Φ ave of Φ=45 ° usually.At this moment, the position of the direction of cut-off rule the closer to Φ=45 ° just can be realized suitableization of tracking error signal more.Otherwise tracking error signal is with regard to deterioration.On the other hand, the direction of cut-off rule just can realize suitableization of tracking error signal more the closer to the position of Φ ave, but its reverse side, and focus error signal is deterioration but.
Applicant of the present invention has studied in Φ=45 ° and Φ ave when inconsistent, how to set the 4 just suitable problems of cut-off rule of cutting apart sensor in the scope of the position of the position～Φ ave of Φ=45 °.At this moment, the focus error signal when staggered in 4 positions of cutting apart the position of the cut-off rule of sensor and Φ=45 ° or Φ ave and the degradation of tracking error signal have been carried out following investigation.
As shown in Figure 3A, after astigmatism imported laser, the beam spot on the optical detector was to the both direction distortion of mutually orthogonal.So, with the straight line at center that passes beam spot as axle, make 4 to cut apart the sensor rotation after, the amplitude (peak-to-peak) of focus error signal (Astigmatism methord) is just with 90 ° swing circle variation.
Different therewith, according to the method for recommending, when generating tracking error signal, with above-mentioned the same, with the straight line at center that passes beam spot as axle, make 4 to cut apart the sensor rotation after, the amplitude (peak-to-peak) of focus error signal (Astigmatism methord) is just with 180 ° swing circle variation.In other words, the amplitude cycle of tracking error signal becomes 2 times of amplitude cycle of focus error signal.
Therefore, 4 cut-off rules of cutting apart sensor are when stagger in the optimum position, and what the degree of the Signal Degrade of focus error signal, comparison-tracking error signal get well greatly.Like this, in Φ=45 ° with Φ ave when inconsistent, compare with position, near Φ=45 ° position can suppress the deterioration of focus error signal and tracking error signal more effectively near Φ ave.
Below, being set forth in the optical system of Fig. 1, when setting the value of regulation for, 4 cut apart the concrete adjustment example of sensor with angle of oscillation α and track angle Φ 1max, Φ 1min (the normal amount of staggering Z).
＜concrete adjustment example 〉
This adjustment example is in the optical system of above-mentioned Fig. 1, sets HD for Z=5mm with the normal of object lens 15 Z that staggers, and when setting angle of oscillation α for α=+ 35 °, 4 configurations of cutting apart sensor is adjusted to appropriate value.
HD staggers Z when being Z=5mm with the normal of object lens 15, and with reference to Figure 16 B, the maximal value θ 1max of track angle θ 1 and minimum value θ 1min become 1max=13 ° of maximal value θ, minimum value θ 1min=5 ° respectively.Behind these values and the above-mentioned formula of angle of oscillation α=+ 35 ° substitution (1) (2), can be as described below, obtain Φ max shown in Fig. 3 B, the C and Φ min.
Φmax＝35°-5°＝30°
Φmin＝35°-13°＝22°
In addition, according to these Φ max and Φ min and above-mentioned formula (3), can be as described below, obtain Φ ave.
Φave＝(30°+22°)/2＝26°
Like this, through after the above investigation as can be known: as long as 4 cut-off rules of cutting apart sensor are set in the scope of Φ=45 ° and Φ ave=26 °, and compare with Φ ave=26 ° position, the position of the position of more close Φ=45 ° gets final product.In more detail, because the angle of the centre of Φ ave=26 and Φ=45 ° is about 35 °, so as long as for example make 4 cut-off rules of cutting apart sensor be positioned at ground, position configuration HD about 40 ° with the sensor patterns of optical detector 16.
In addition, in above-mentioned example,, adjust 4 configurations of cutting apart the cut-off rule of sensor according to Φ=45 ° and Φ ave=26 °.But also can be according to dislocation is bigger for Φ=45 ° among Φ max and the Φ min a side and Φ=45 °, the configuration of the cut-off rule of sensor is cut apart in adjustment 4.
In other words, in above-mentioned example, according in Φ max=30 ° and Φ min=22 ° for the Φ=45 ° Φ min=22 that the speech dislocation is bigger and Φ=45 °, the configuration of the cut-off rule of sensor is cut apart in adjustment 4.Like this, compared with the above case, the deterioration of tracking error signal is subjected to some inhibition, but the deterioration of its reverse side focus error signal has some growths.
At this moment, as long as 4 cut-off rules of cutting apart sensor are set in the scope of Φ=45 ° and Φ ave=22 °, and compare with Φ ave=22 ° position, the position of the position of more close Φ=45 ° gets final product.In more detail, because the angle of the centre of Φ ave=22 and Φ=45 ° is about 33 °, so dispose the sensor patterns of HD with optical detector 16 as long as 4 cut-off rules of cutting apart sensor are positioned at than 40 ° of a little bit smaller slightly positions (for example about 38 °).
＜checking example 〉
Figure 13 represents HD with the normal of object lens 15 stagger the focus error signal that Z generates as Z=5mm and when making angle of oscillation α become Φ=35 ° and the checking example (simulation) of tracking error signal.In addition, the longitudinal axis and the transverse axis of the checking result shown in verification condition and Figure 13 B, all the checking example with the foregoing description 1 is the same.
Analog result shown in Figure 13 is: be simulation with Φ=45 of Fig. 3 A ° as reference position (angle=0 °), make 4 to cut apart Fig. 6 A in the cut-off rule of sensor and the PP cut-off rule shown in the C, towards near and the situation of the signal amplitude (TE amplitude) of the signal amplitude (FE amplitude) of focus error signal when leaving the direction rotation of disc plane direction of this figure and tracking error signal (push-pull signal).
The TE amplitude of (when HD is positioned at the most peripheral position with object lens 15) when in the figure, the TE amplitude that dots is HD with minimum value Φ 1min=5 ° of the track angle Φ 1 of object lens 15.In addition, with the TE amplitude that solid line is represented, the TE amplitude of (when HD is positioned at the most all positions with object lens 15) when being HD with maximal value Φ 1max=13 ° of the track angle Φ 1 of object lens 15.
As above investigation was illustrated, the signal amplitude characteristic of focus error signal is compared with the signal amplitude characteristic of tracking error signal, and was quite precipitous.As known in the figure: after the 4 PP cut-off rules of cutting apart sensor stagger from the position of Φ=45 °, the just serious deterioration of the signal amplitude of focus error signal.Different therewith, even stagger in the position (among Figure 13 be 19 ° position) of the 4 PP cut-off rules of cutting apart sensor from Φ=26 °, the signal amplitude of tracking error signal does not have so big deterioration yet.Hence one can see that: even make the position of the 4 more close Φ of PP cut-off rule of cutting apart sensor=45 °, how big the signal amplitude of tracking error signal do not have deterioration yet.
After 4 positions of cutting apart the PP cut-off rule of sensor and Φ ave were coincide, the signal amplitude of focus error signal corrupted to peaked about 82% (with reference to the arrow locations of " B " among Figure 13).And then, 4 positions of cutting apart the PP cut-off rule of sensor and Φ min are coincide after, the signal amplitude of focus error signal corrupts to peaked about 70% (with reference to the arrow locations of " C " among Figure 13).Different therewith, even make the position of the 4 PP cut-off rules of cutting apart sensor and Φ=45 ° identical, the signal amplitude of tracking error signal also can be kept peaked about 95% (with reference to the arrow locations of " A " among Figure 13).Like this, when 4 positions of cutting apart the PP cut-off rule of sensor and Φ=45 ° are coincide, also can generate the tracking error signal of suitable level.At this moment, because focus error signal becomes optimizing level, institute can be maintained in optimizing level with focus error signal so that 4 to cut apart the position of the PP cut-off rule of sensor and Φ=45 ° identical, makes tracking error signal become suitable level.
In sum, after adopting present embodiment, the 4 PP cut-off rules of cutting apart sensor are set for the position of Φ=45 ° compare with the centre position of the position of Φ ave, the position of more close Φ=45 °, thus can make the neither deterioration ground of focus error signal and tracking error signal become optimum condition.At this moment, change with moving of object lens 15, also the amplitude of tracking error signal can be maintained in suitable level even track angle θ 1 is accompanied by HD.Therefore, behind the employing present embodiment, can realize stable focus servo and tracking servo.
In addition, as present embodiment verify, even set HD the position of Φ=45 ° for the PP cut-off rule of sensor 16, also can obtain the not too tracking error signal of deterioration.Like this, just can set HD the position of Φ=45 ° for the PP cut-off rule of sensor 16, thus can be on the one hand with the degradation inhibiting of tracking error signal to very low, on the one hand focus error signal is maintained in optimizing level.
[embodiment 4]
In the foregoing description 3, as shown in figure 14, express the situation of angle of oscillation α being set for positive dirction (counterclockwise).But shown in Figure 15 A, when setting angle of oscillation α for negative direction (clockwise direction), as long as behind the angle of oscillation α with the above-mentioned formula of negative value substitution (1) (2) (3), obtain Φ max and Φ min and Φ ave, according to them and Φ-45 °, set 4 positions of cutting apart the cut-off rule of sensor and get final product.
For example, in Figure 15 A, the normal amount of staggering Z is Z=5mm (θ 1max=13 °, θ 1min=5 °), angle of oscillation α when being α=-20 °, obtains Φ max, Φ min and Φ ave as follows.
Φmax＝-20°-5°＝-25°
Φmin＝-20°-13°＝-33°
Φave＝-20°-(13°+5°)/2＝-29°
At this moment, as long as 4 cut-off rules of cutting apart sensor are set in the scope of Φ=-45 ° and Φ ave=-29 °, and compare with Φ ave=-29 ° position, the position of the position of more close Φ=-45 ° gets final product.In more detail, because the angle of the centre of Φ ave=-29 ° and Φ=-45 ° is about-37 °, so for example can make 4 cut-off rules of cutting apart sensor be positioned at-40 ° or than dispose the sensor patterns of HD its slightly little position (for example-42 ° about) with sensor 16.
In addition, can according in Φ max=-25 ° and Φ min=-33 ° for Φ=-45 °, the Φ max=-25 that staggers bigger ° and Φ=-45 °, the configuration of the cut-off rule of sensor is cut apart in adjustment 4.Like this, as mentioned above, ° compare as using ave=-29 ° of Φ and Φ=-45, the deterioration of tracking error signal is subjected to some inhibition, but the deterioration of its reverse side focus error signal has some growths.
At this moment, as long as 4 cut-off rules of cutting apart sensor are set in the scope of Φ=-45 ° and Φ ave=-25 °, and compare with Φ ave=-25 ° position, the position of the position of more close Φ=-45 ° gets final product.In more detail, because the angle of the centre of Φ ave=-25 ° and Φ=-45 ° is about-35 °, so for example can make 4 cut-off rules of cutting apart sensor be positioned at-40 ° ground, position configuration HD with the sensor patterns of sensor 16.
In addition, at this moment also the same with the checking of the foregoing description 3, even HD is set to the position of Φ=-45 ° with the PP cut-off rule of sensor 16, also can obtain the not too tracking error signal of deterioration.Like this, just can set HD the position of Φ=45 ° for the PP cut-off rule of sensor 16, thus can be on the one hand with the degradation inhibiting of tracking error signal to very low, on the one hand focus error signal is maintained in optimizing level.
[embodiment 5]
In addition, shown in Figure 10 B, HD is configured in the left side of DVD with object lens 26 with object lens 15, thereby when negative direction produces normal and staggers, as long as the normal amount of staggering Z with the above-mentioned formula of negative value substitution (1) (2) (3), obtain Φ max, Φ min and Φ ave, according to they and Φ=45 °, set 4 positions of cutting apart the cut-off rule of sensor and get final product again.
For example, in Figure 15 B, the normal amount of staggering Z is Z=-5mm (θ 1max=-5 °, θ 1min=-13 °), angle of oscillation α when being α=20 °, obtains Φ max, Φ min and Φ ave as follows.
Φmax＝20°-(-13°)＝33°
Φmin＝20°-(-5°)＝25°
Φave＝20°-(-13°-5°)/2＝29°
At this moment, as long as 4 cut-off rules of cutting apart sensor are set in the scope of Φ=45 ° and Φ ave=29 °, and compare with Φ ave=29 ° position, the position of more close Φ=45 ° gets final product.In more detail, because the angle of the centre of Φ ave=29 ° and Φ=45 ° is about 37 °, so for example can make 4 cut-off rules of cutting apart sensor be positioned at 40 ° or dispose the sensor patterns of HD (for example about 42 °) with sensor 16 than its big slightly position.
In addition, can according in Φ max=33 ° and Φ min=22 ° for Φ=45 °, the Φ max=25 that staggers bigger ° and Φ=45 °, the configuration of the cut-off rule of sensor is cut apart in adjustment 4.Like this, as mentioned above, ° compare as using ave=29 ° of Φ and Φ=45, the deterioration of tracking error signal is subjected to some inhibition, but the deterioration of its reverse side focus error signal has some growths.
At this moment, as long as 4 cut-off rules of cutting apart sensor are set in the scope of Φ=45 ° and Φ ave=25 °, and compare with Φ ave=25 ° position, the position of the position of more close Φ=45 ° gets final product.In more detail, because the angle of the centre of Φ ave=25 ° and Φ=45 ° is about 35 °, so for example can make 4 cut-off rules of cutting apart sensor be positioned at 40 ° ground, position configuration HD with the sensor patterns of sensor 16.
In addition, at this moment also the same with the foregoing description 3, even set HD the position of Φ=45 ° for the PP cut-off rule of sensor 16, also can obtain the not too tracking error signal of deterioration.Like this, even HD is set to the position of Φ=-45 ° with the PP cut-off rule of sensor 16, also can be on the one hand with the degradation inhibiting of tracking error signal to very low, on the one hand focus error signal is maintained in optimizing level.
More than told about embodiment and the embodiment that the present invention relates to, but the present invention is not limited to above-mentioned embodiment and embodiment, in addition, various changes can also be arranged.
For example: in above-mentioned embodiment and embodiment, express HD and the situation that normal staggers occurs with object lens.But when the present invention normal occurs and staggers with object lens at DVD, can use too.And then, when HD normal occurs and staggers with the object lens both with object lens and DVD, can use the present invention too.
In addition, normal does not take place and staggers in object lens, when having only angle of oscillation α to become the angle different with ± 45 °, can use the present invention yet.In this case, with the Φ 1max=Φ above-mentioned formula of 1min=0 substitution (1) (2) (3).At this moment, become Φ ave=Φ min=Φ max=α.Like this, according to Φ=45 ° (or-45 °) and Φ ave=Φ min=Φ max=α, according to above-mentioned same gimmick, 4 cut-off rules of cutting apart sensor are carried out the position adjustment.
In addition, angle of oscillation α is α=± 45 °, but object lens produce normal when staggering, also can be the same with the various embodiments described above, use the present invention.
In addition, in above-mentioned embodiment and embodiment, use HD semi-transparent semi-reflecting lens 12.But can replace, use flat polarized light catoptron.At this moment, in two faces of polarized light catoptron, form polarization film on the face of injecting with the laser of laser instrument 11 from HD.In addition, the light path with object lens 15 positions from the polarized light catoptron to HD, configuration λ/4 plates configuration.
In addition, in above-mentioned embodiment and embodiment, the collimation lens in optical system, have been disposed.When but laser is injected object lens with wired system, also can omit the collimation lens.
In addition, in the above-described embodiment, enumerated the example of the exchange type optical pickup apparatus of HDDVD and DVD, but, can use too at optical pickup apparatus for other dish and CD.
Embodiments of the present invention can suitably be carried out various changes in the scope of the technological thought that " claims " set forth.
Claims (6)
1. optical pickup apparatus possesses:
Semiconductor laser,
The 1st object lens, the laser focusing that the 1st object lens will be penetrated by described semiconductor laser and are configured in the diameter L of opposing parallel in the described dish of the moving direction of optical pickup apparatus to dish, stagger apart from the position of Z along the in-plane of described dish,
Optical detector, this optical detector receive the described laser by described dish reflection, and have the sensor patterns that is divided into 4 zones with 2 cut-off rules of quadrature, and
Flat optics, the described laser that this optics reflection is penetrated by described semiconductor laser with its described the 1st object lens side that leads, and sees through the described laser that is reflected by described dish, with its described optical detector side that leads;
Reflected by described optics and the optical axis of the described laser of described the 1st object lens side that leads, with respect to for the described diameter L-orthogonal of described dish and the straight line parallel with the in-plane of described dish, during along the in-plane wallowing motion angle α of described dish, adjust described angle of oscillation α and described apart from Z, make the orbital direction of the described dish in the described optical detector, the importing direction of the astigmatism that causes with described optics roughly becomes 45 ° angle, and make in 2 cut-off rules of described sensor patterns one, roughly become 45 ° straight line coupling with the importing direction of described astigmatism.
2. optical pickup apparatus as claimed in claim 1 is characterized in that: the angle that constitutes at the straight line of the access site of center that will connect described dish and described the 1st object lens, with described diameter L is as track angle θ 1; With the track angle θ 1 of described the 1st object lens when interior all position of described dish as θ 1max; During as θ 1min, described angle of oscillation α and described apart from Z is configured to satisfy with the track angle θ 1 of described the 1st object lens when the most peripheral position of described dish
α-(θ1max+θ1min)/2＝±45°。
3. optical pickup apparatus as claimed in claim 2 is characterized in that: also possess 2nd object lens different with described the 1st object lens, the 2nd object lens are configured in along the position of the described diameter L of described dish.
4. optical pickup apparatus as claimed in claim 3 is characterized in that: have the actuator that drives object lens, described the 1st object lens and described the 2nd object lens are installed on the same actuator movable part.
5. optical pickup apparatus as claimed in claim 4, it is characterized in that: be intended to optical system, be used as 2nd optical system configurations different with the 1st optical system with described semiconductor laser, optical detector and optics with this laser of described the 2nd object lens of laser guide and the reflection of reception quilt dish.
6. optical pickup apparatus as claimed in claim 5 is characterized in that: described the 1st optical system and described the 2nd optical system, and respectively by the described the 1st and the 2nd object lens, with the different wavelength of laser positioning disk.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005376247 | 2005-12-27 | ||
| JP2005376247A JP4390769B2 (en) | 2005-12-27 | 2005-12-27 | Optical pickup device |
| JP2005-376247 | 2005-12-27 | ||
| JP2005377003 | 2005-12-28 | ||
| JP2005-377003 | 2005-12-28 | ||
| JP2005377003A JP4342513B2 (en) | 2005-12-28 | 2005-12-28 | Optical pickup device and layout setting method thereof |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101306305A Division CN101299341B (en) | 2005-12-27 | 2006-12-18 | Optical pickup device and method of laying out the same |
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| CN101025952A CN101025952A (en) | 2007-08-29 |
| CN101025952B true CN101025952B (en) | 2010-05-19 |
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| CN2008101306305A Expired - Fee Related CN101299341B (en) | 2005-12-27 | 2006-12-18 | Optical pickup device and method of laying out the same |
| CN2006101723643A Expired - Fee Related CN101025952B (en) | 2005-12-27 | 2006-12-18 | Optical pickup device |
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| CN2008101306305A Expired - Fee Related CN101299341B (en) | 2005-12-27 | 2006-12-18 | Optical pickup device and method of laying out the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4905278B2 (en) * | 2007-07-19 | 2012-03-28 | ソニー株式会社 | Optical pickup device and optical disk device using the same |
| KR101233518B1 (en) * | 2008-03-11 | 2013-02-14 | 니혼 덴산 가부시키가이샤 | Adjustment method of normal line direction of base plate |
| JP4610662B2 (en) * | 2008-09-29 | 2011-01-12 | 三洋電機株式会社 | Optical pickup device and optical disk device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196816A (en) * | 1996-05-09 | 1998-10-21 | 索尼公司 | Optical pickup and disk player |
| CN1201973A (en) * | 1997-04-23 | 1998-12-16 | 日本胜利株式会社 | Optical disc apparatus |
| CN1269579A (en) * | 1999-03-31 | 2000-10-11 | 三星电子株式会社 | Compatible optical pick-up device |
| WO2005004128A2 (en) * | 2003-07-07 | 2005-01-13 | Matsushita Electric Industrial Co., Ltd. | Objective lens, optical pick-up device, and optical disk device |
| WO2005038785A2 (en) * | 2003-10-21 | 2005-04-28 | Koninklijke Philips Electronics N.V. | Improved arrangement for dual lens actuator |
-
2005
- 2005-12-27 JP JP2005376247A patent/JP4390769B2/en not_active Expired - Fee Related
-
2006
- 2006-12-18 CN CN2008101306305A patent/CN101299341B/en not_active Expired - Fee Related
- 2006-12-18 CN CN2006101723643A patent/CN101025952B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196816A (en) * | 1996-05-09 | 1998-10-21 | 索尼公司 | Optical pickup and disk player |
| CN1201973A (en) * | 1997-04-23 | 1998-12-16 | 日本胜利株式会社 | Optical disc apparatus |
| CN1269579A (en) * | 1999-03-31 | 2000-10-11 | 三星电子株式会社 | Compatible optical pick-up device |
| WO2005004128A2 (en) * | 2003-07-07 | 2005-01-13 | Matsushita Electric Industrial Co., Ltd. | Objective lens, optical pick-up device, and optical disk device |
| WO2005038785A2 (en) * | 2003-10-21 | 2005-04-28 | Koninklijke Philips Electronics N.V. | Improved arrangement for dual lens actuator |
Also Published As
| Publication number | Publication date |
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| CN101025952A (en) | 2007-08-29 |
| CN101299341B (en) | 2011-06-08 |
| JP2007179635A (en) | 2007-07-12 |
| CN101299341A (en) | 2008-11-05 |
| JP4390769B2 (en) | 2009-12-24 |
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