CN101226758B - Tilt adjustment device for objective lenses and method of adjusting tilt of objective lenses - Google Patents
Tilt adjustment device for objective lenses and method of adjusting tilt of objective lenses Download PDFInfo
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- CN101226758B CN101226758B CN2008100029818A CN200810002981A CN101226758B CN 101226758 B CN101226758 B CN 101226758B CN 2008100029818 A CN2008100029818 A CN 2008100029818A CN 200810002981 A CN200810002981 A CN 200810002981A CN 101226758 B CN101226758 B CN 101226758B
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- object lens
- degree
- tilt
- retainer
- fixed support
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Abstract
A tilt adjustment device K for objective lenses which comprises: a positioning stand 52 for supporting a holder 3 which fixedly holds a first objective lens 1; at least three pins 57 a, 57 b, and 57 c for supporting an inferior surface of an edge of a second objective lens 2 by each tip of the pins; a pin fixedly supporting member 57 for fixedly supporting the ends of the pins; tilt adjusting means for tilting the pin fixedly supporting member 57 so that the second objective lens 2 is tilt-adjusted around a principal point center with respect to an inferior surface of an edge of the first objective lens 1; and a press member 54 for pressing a superior surface of the second objective lens 2, which can be removed after the second objective lens 2 is fixed.
Description
Technical field
The present invention relates to be used for the degree of tilt regulating device of object lens and the method for regulating degree of inclination of objective lens.More particularly, the present invention relates to be arranged on the degree of tilt regulating device that is used for object lens in the optic pick-up, wherein this optic pick-up will be assembled from the laser beam that laser diode sends, to use the laser beam irradiation information recording carrier of this convergence, this optic pick-up receives from the light of information recording carrier reflection, and reproduction and/or recorded information, and the present invention relates to regulate the method for the degree of tilt of these object lens.
Background technology
This optic pick-up usually is provided with: actuator (actuator), and it has a plurality of object lens, with the convergent laser bundle with use the laser beam irradiation information recording carrier assembled; And retainer, be used to keep object lens, make each object lens to regulate with predetermined degree of tilt.
As shown in Figure 7, regulate the adjusting degree of tilt that the structure of the degree of tilt of object lens can be regulated object lens 30 around principal point (principalpoint) center O 1 of object lens 30.Particularly, the principal point center O 1 of object lens 30 is positioned as the lower surface (the smooth zone of the edge of camera lens) at the edge that is higher than object lens 30, and the outermost portion of the lower surface at this edge contacts with object lens retainer 40.Therefore, only by inclination object lens retainer 40, degree of tilt can be conditioned, and makes laser beam be assembled and be transmitted into information recording carrier.Label 40R represents the arc-shaped surface of object lens retainer 40.
On the other hand, regulate in the structure of degree of tilt of object lens at another, as shown in Figure 8, the principal point center O 2 of object lens 35 is lower than the lower surface at the edge of object lens 35.Therefore, even when the outermost portion of the lower surface at the edge of object lens 35 contacts with object lens retainer 40, as the object lens 30 of Fig. 7, degree of tilt can not be adjusted to the convergent laser bundle and the laser beam that will be assembled is transmitted into information recording carrier.
In this case, object lens distance piece 45 is fixed to object lens 35 by bonding or similar mode, makes the principal point center O 2 of object lens 35 be positioned as the lower surface that is higher than object lens distance piece 45.Object lens distance piece 45 and object lens 35 must be assembled in the object lens retainer 40, to regulate the degree of tilt (referring to Japanese Unexamined Patent Application publication number 2005-174485 and 2006-19001) of object lens 35.
Yet the structure of degree of tilt of regulating these object lens is very complicated, and also increases man-hour.
As mentioned above, in the classic method of the principal point center adjustment degree of tilt of object lens, must be higher than or the lower surface that is lower than the edge of object lens changes assembling process according to principal point center (or principal point) simply.
Summary of the invention
Purpose of the present invention will make degree of inclination of objective lens easily to be regulated, and does not change the supporting process (assembling process) of object lens, no matter the position at the principal point center of each object lens is the lower surface that are higher or lower than the edge of object lens.
The invention provides a kind of degree of tilt regulating device that is used for object lens, object lens are arranged in the optic pick-up, this optic pick-up is used for assembling the laser beam of sending from laser diode, with the light beam irradiates information recording carrier of assembling, reception is from the light of information recording carrier reflection, with reproduction and/or recorded information, described optic pick-up is provided with actuator, described actuator comprises a plurality of described object lens that are used for the convergent laser bundle and the retainer that keeps being conditioned with respect to described retainer the object lens of degree of tilt with being used for fixing, wherein, described degree of tilt regulating device comprises: the retainer support bed is used to support the retainer of object lens that keep described a plurality of object lens regularly; At least three pins are used for supporting by each end of described pin the lower surface at the edge of each other object lens; Pin fixed support, the end of the described pin of supporting with being used for fixing; The degree of tilt regulating device of described pin fixed support, it tilts to regulate the degree of tilt of each described other object lens with respect to the lower surface at the edge of described object lens around the principal point center; And pressing piece, being used to press the upper face of each described other object lens, described pressing piece can be removed after being fixed to described other object lens on the described retainer.
According to the present invention, the retainer of forming actuator with object lens keeps described object lens regularly, and described other object lens are regulated degree of tilt with respect to this retainer by at least three pins and pin fixed support, make that the degree of tilt of described object lens can at random be set.And described other object lens can be kept with predetermined degree of tilt with respect to retainer---promptly with respect to described object lens---regularly.Therefore, with simple structure and higher workability, keep two object lens regularly.
In the degree of tilt regulating device that is used for object lens of the present invention, the degree of tilt of described other object lens is conditioned with respect to retainer, described retainer is formed actuator with object lens, described actuator is set in the optic pick-up, light and reproduction and/or recorded information that laser beam, the light beam irradiates information recording carrier that utilizes convergence, the reception that this optic pick-up convergence is sent from laser diode reflected from this information recording carrier.The degree of tilt regulating device that is used for object lens comprises: the retainer support bed is used to support the retainer that keeps described object lens regularly; At least three pins are used for supporting by each end of described pin the lower surface at the edge of each described other object lens; Pin fixed support, the end of the described pin of supporting with being used for fixing; The degree of tilt regulating device of described pin fixed support, it tilts to regulate the degree of tilt of each described other object lens with respect to the lower surface at the edge of described object lens around the principal point center; And pressing piece, being used to press the upper face of each described other object lens, described pressing piece can be removed after being fixed to described other object lens on the described retainer.
Forming with retainer in the object lens of actuator, described object lens are kept regularly with respect to retainer, and (it can be one or more object lens to described other object lens, and described object lens are only to be one) temporarily supported by three pins described later and pin fixed support, make described other object lens after being conditioned degree of tilt, to be kept regularly.Described other object lens can keep with for example adhesive securement ground after being conditioned degree of tilt.Bonding agent is injected between described other object lens and the retainer.
In the present invention, in order to support each described other object lens with predetermined degree of tilt, use at least three pins and pin fixed support, described pin is used for the lower surface by the edge of its each each described other object lens of end bearing, and described fixed support is used for fixing the end of ground fulcrum post.
Preferably, each end of at least three pins has semispherical surface, to support described other object lens.In this case, even when described other object lens of pin (each end) contact, have only lifting force to be applied on described other object lens, and do not add biasing force or damage described other object lens.
In the present invention, the degree of tilt regulating device of pin fixed support comprises: fulcrum arrangement is used to support described pin fixed support, tilting; Detecting device is used to detect every light from the upper face reflection of object lens; And leaning device, be used for by the detection signal that relatively obtains by described detecting device via the described fulcrum arrangement described pin fixed support that tilts, make the lower surface at edge of each described other object lens be conditioned degree of tilt with respect to the lower surface at the edge of described object lens around the principal point center.Therefore, the degree of tilt adjusting---being that described other degree of inclination of objective lens is by the adjusting of pin---of pin fixed support can automatically and exactly be carried out.
In the present invention, the pin fixed support comprises: the fixed bearing platform has lip-deep at an upper portion thereof recess or protuberance; Regulate pedestal with degree of tilt, it is supported slidably by the recess of described fixed bearing platform or protuberance surface, and described degree of tilt is regulated pedestal and is swung described pin fixed support, make each described other object lens be conditioned degree of tilt (this degree of tilt is regulated pedestal and had protuberance or recess on surface, its underpart, recess on the upper face of corresponding fixed bearing platform or protuberance) with respect to the lower surface at the edge of described object lens around the principal point center.Therefore, described other object lens can support with arbitrarily angled when regulating degree of tilt with being stabilized, and can easily be fixed (by using bonding agent).
Pin can be removed from the pin fixed support after described other object lens are conditioned degree of tilt and fix.Alternatively, pin and pin fixed support can be removed from retainer after described other object lens are conditioned degree of tilt and fix.
According on the other hand, the invention provides a kind of method of regulating degree of inclination of objective lens, object lens are arranged in the optic pick-up, described optic pick-up is used for assembling the laser beam sent from laser diode, with the light beam irradiates information recording carrier of assembling, receive from light and the reproduction and/or the recorded information of information recording carrier reflection, described optic pick-up is provided with actuator, and described actuator comprises a plurality of object lens that are used for the convergent laser bundle and the retainer that keeps being conditioned with respect to described retainer described a plurality of object lens of degree of tilt with being used for fixing.This method comprises: support the step of described retainer, described retainer keeps object lens of described a plurality of object lens regularly; The lower surface at the edge of each each other object lens of end bearing by at least three pins and support the step of the end of described pin by the pin fixed support regularly; Thereby described pin fixed support presses the upper face of each described other object lens to regulate the step of the degree of tilt of each described other object lens with respect to the lower surface at the edge of described object lens around the principal point center with pressing piece simultaneously by tilting; With after regulating the degree of tilt of described other object lens, described other object lens are fixed to step on the described retainer.
Description of drawings
Fig. 1 is the part cutaway side sectional view that shows according to the schematic basic structure of first embodiment of the degree of tilt regulating device that is used for object lens of the present invention;
Fig. 2 is the plan view of the degree of tilt regulating device in the displayed map 1 schematically;
Fig. 3 is the amplification plan view of major part of the degree of tilt regulating device of Fig. 2;
Fig. 4 has shown the longitudinal cross-section corresponding to the amplification of the major part of Fig. 3;
Fig. 5 is the plan view of basic structure that shows the optic pick-up P of three kinds of wavelength;
Fig. 6 is the cross sectional view of the optic pick-up of Fig. 5;
Fig. 7 is the synoptic diagram that shows the major part of the degree of inclination of objective lens adjustment structure that is kept regularly by traditional actuator; With
Fig. 8 is the synoptic diagram of the major part of the degree of inclination of objective lens adjustment structure that shows that the traditional actuator be different from Fig. 7 keeps regularly.
Embodiment
The embodiment that is used for the degree of tilt regulating device of object lens of the present invention will be described with reference to the accompanying drawings hereinafter.
First embodiment
Fig. 1 is the part cutaway side sectional view that shows according to the schematic basic structure of first embodiment of the degree of tilt regulating device that is used for object lens of the present invention.Fig. 2 is the plan view of the degree of tilt regulating device in the displayed map 1 schematically.Fig. 3 is the amplification plan view of major part of the degree of tilt regulating device of Fig. 2.Fig. 4 has shown the amplification longitudinal cross-section corresponding to the major part of Fig. 3.
In Fig. 1-4, be used for the degree of tilt of the degree of tilt regulating device K adjusting object lens of object lens, the object lens composition will be set at optic pick-up and (also be called for short: the actuator optical pickup apparatus).Here, actuator has: a plurality of object lens, and promptly first object lens 1 and second object lens 2 are used for the convergent laser bundle and use the laser beam irradiation information recording carrier of being assembled; And retainer (object lens retainer) 3, be used to keep object lens 1 and 2.
Retainer 3 keeps first object lens 1 regularly and keeps second object lens 2 regularly after second object lens 2 are conditioned degree of tilt.
The degree of tilt regulating device K that is used for object lens comprises: locating rack (positioning stand) 52, and as the retainer support bed that is used to support retainer 3, described retainer 3 keeps first object lens 1 regularly; At least three pins 57a, 57b and 57c are used for the lower surface (inferior surface) at the edge of each end bearing second object lens 2 by pin; Sell fixed support 57, be used for fixing the end of ground fulcrum post; The degree of tilt regulating device is used for angled pin fixed support 57, make second object lens 2 around the principal point center with respect to the lower surface at the edge of first object lens 1 and be conditioned degree of tilt; With pressing piece 54, be used to compress the upper face (superior surface) of second object lens 2, this pressing piece can be removed after second object lens are fixed.
Each end of pin 57a, 57b and 57c has semispherical surface, is used to support second object lens 2.Pin 57a, 57b and 57c can remove after second object lens 2 are conditioned degree of tilt and fix.
Retainer 3 has: be used for the lens opening 3a of first object lens 1, be used for the lens opening 3b of each second object lens 2, be used for pin 57a, 57b and 57c deviate from hole 3c and bonding agent hole 3d, 3e ..., these holes are near the support 4 that is installed to object lens 1 and 2.
Locating rack 52 has the adjustment hole 52a that is used for first object lens, makes locating rack 52 not contact with first object lens 1, and has and be used for second object lens, 2 adjustment hole 52b, makes locating rack 52 not contact with second object lens 2.
The degree of tilt regulating device of pin fixed support comprises: first regulates platform 53, is used for fulcrum post fixed support 57, can regulate degree of tilt; The leaning device (not shown) stablize the handle of platform (biaxial goniostage) as the first twin shaft angle of regulating the X-axis line of platform 53 and Y-axis line direction, and it can be by the first adjusting platform 53 angled pin fixed support 57 fine; Detecting device 100 is used to detect every light from the upper face reflection of object lens 1 and 2; With monitor 100a, the detection signal that it can relatively be obtained by detecting device 100.
The first adjusting platform 53 and the locating rack 52 that are used for first object lens 1 are regulated platform 51 supportings by second, can regulate degree of tilt.Here, second regulate platform 51 and can regulate the X-axis line of platform 53 and the twin shaft angle of Y-axis line direction is stablized the degree of tilt that platform is regulated second object lens 2 by using first.The knob (rotation knob) of label 55 expression pressing pieces 54.Second object lens 2 by be pressed part 54 exert pressure be conditioned degree of tilt and fixing after, this pressing piece 54 can be removed from the position on second object lens 2 by rotation.It is as mentioned below to have operation said structure, that will be set at the degree of tilt regulating device that is used for object lens in the optic pick-up.
At first, detected and be presented on the monitor 100a by detecting device 100 from every light of the upper face of object lens 1 and 2 reflection, to compare mutually.
In case the user sees the demonstration on the monitor 100a, he suitably operates leaning device, stablize the handle of platform as the first twin shaft angle of regulating the X-axis line of platform 53 and Y-axis line direction, with angled pin fixed support 57 fine, the lower surface with respect to the edge of first object lens 1 tilts around the principal point center to make second object lens 2.By this way, can be conditioned from object lens 1 and 2 every light that reflect, with irradiation information recording carrier 20.
Subsequently, bonding agent is injected among bonding agent hole 3d, the 3e..., is fixed on the retainer 3 with second object lens that will temporarily be kept.As the example of bonding agent, can use ultraviolet curable resin (ultraviolet curing resin).After second object lens 2 were fixed, pressing piece 54 was by operation knob 55 and remove the position from second object lens 2.
As mentioned above, in degree of tilt regulating device K, first object lens 1 in the object lens 1 and 2 are kept regularly with respect to retainer, and second object lens 2 are conditioned degree of tilt with respect to this retainer and by at least 3 pins and pin fixed support, and the degree of tilt of the object lens 1 of winning can at random be set.And second object lens 2 can be kept with predetermined degree of tilt with respect to retainer---promptly with respect to first object lens 1---regularly.Therefore, with simple structure and high workability, object lens 1 and 2 can be kept regularly.
With reference to figure 5 and 6, the basic structure of the optic pick-up P of three kinds of wavelength is described.
In Fig. 5 and 6, the light that sends from the semiconductor Laser device 11 as light source A is calibrated lens A14 and converts directional light to.This directional light is by dichroic prism (dichroic lens) 13 reflections, and the directional light of reflection is advanced towards object lens 16 and 17 as directional light.The directional light of reflection passes object lens 16 and 17, and is transformed into converging light.Converging light be focused at as on the CD 20 of information recording carrier a bit on, and be reflected thus.
On the other hand, the light that sends from the semiconductor Laser device 12 as light source B passes cylindrical lens 19 and is calibrated lens 15 and converts directional light to.This directional light passes dichroic prism 13, and advances towards object lens 16 and 17 with the state of directional light.The directional light that passes dichroic prism 13 passes object lens 16 and 17, is similar to above-mentioned reflection directional light, and is converted into converging light.This converging light be focused at as on the CD 20 of information recording carrier a bit on, and be reflected thus.
The shell of label 10 expression optic pick-up P, and label 18 expression actuators.
Claims (11)
1. degree of tilt regulating device that is used for object lens, object lens are arranged in the optic pick-up, described optic pick-up is used for assembling the laser beam of sending from laser diode, with the light beam irradiates information recording carrier of assembling, reception is from the light of information recording carrier reflection, with reproduction and/or recorded information, described optic pick-up is provided with actuator, described actuator comprises a plurality of described object lens and retainer, a plurality of described object lens are used for the convergent laser bundle, and described retainer keeps being conditioned with respect to described retainer described a plurality of object lens of degree of tilt with being used for fixing
Wherein, described degree of tilt regulating device comprises:
The retainer support bed is used to support one the retainer that keeps described a plurality of object lens regularly;
At least three pins are used for supporting by each end of described pin the lower surface at the edge of each other object lens;
Pin fixed support, the end of the described pin of supporting with being used for fixing;
The degree of tilt regulating device of described pin fixed support, it tilts to regulate the degree of tilt of each described other object lens with respect to the lower surface at the edge of described object lens around the principal point center; With
Pressing piece is used to press the upper face of each described other object lens, and described pressing piece can be removed after being fixed to described other object lens on the described retainer;
The degree of tilt regulating device of wherein said pin fixed support comprises:
Fulcrum arrangement is used to support described pin fixed support, tilting;
Detecting device is used to detect every light from the upper face reflection of object lens; With
Leaning device, be used for by relatively obtaining by described detecting device detection signal, via the described fulcrum arrangement described pin fixed support that tilts, make the lower surface at edge of each described other object lens be conditioned degree of tilt with respect to the lower surface at the edge of described object lens around the principal point center.
2. the degree of tilt regulating device that is used for object lens as claimed in claim 1, the fulcrum arrangement of wherein said pin fixed support comprises:
The fixed bearing platform has lip-deep at an upper portion thereof recess or protuberance; With
Degree of tilt is regulated pedestal, it is supported slidably by the recess of described fixed bearing platform or protuberance surface, and described degree of tilt is regulated pedestal and is swung described pin fixed support, makes each described other object lens be conditioned degree of tilt around the principal point center with respect to the lower surface at the edge of described object lens.
3. the degree of tilt regulating device that is used for object lens as claimed in claim 1 or 2, wherein after described other object lens were conditioned degree of tilt and are fixed on the described retainer, described pin can be removed from described pin fixed support.
4. the degree of tilt regulating device that is used for object lens as claimed in claim 1 or 2, wherein after described other object lens were conditioned degree of tilt and are fixed on the described retainer, described pin and described pin fixed support can be removed from described degree of tilt regulating device.
5. the degree of tilt regulating device that is used for object lens as claimed in claim 1 or 2, each end of wherein said at least three pins has semispherical surface, is used to support described other object lens.
6. the degree of tilt regulating device that is used for object lens as claimed in claim 1 or 2, wherein said retainer support bed is equipped with locating rack, and this locating rack is passed the laser beam irradiation of each object lens.
7. the degree of tilt regulating device that is used for object lens as claimed in claim 1 or 2, wherein said a plurality of object lens are two object lens.
8. method of regulating degree of inclination of objective lens, object lens are arranged in the optic pick-up, described optic pick-up is used for assembling the laser beam of sending from laser diode, with the light beam irradiates information recording carrier of assembling, reception is from the light of information recording carrier reflection, with reproduction and/or recorded information, described optic pick-up is provided with actuator, described actuator comprises a plurality of object lens that are used for the convergent laser bundle and the retainer that keeps being conditioned with respect to described retainer the object lens of degree of tilt with being used for fixing
Wherein, this method comprises:
Support the step of described retainer, described retainer keeps object lens of described a plurality of object lens regularly;
The lower surface at the edge of each each other object lens of end bearing by at least three pins and support the step of the end of described pin by the pin fixed support regularly;
Thereby described pin fixed support presses the upper face of each described other object lens to regulate the step of the degree of tilt of each described other object lens with respect to the lower surface at the edge of described object lens around the principal point center with pressing piece simultaneously by tilting; With
After regulating the degree of tilt of described other object lens, described other object lens are fixed to step on the described retainer;
Wherein the step around the degree of tilt of each described other object lens of principal point center adjustment comprises:
Detect from the step of every light of the upper face reflection of object lens and the detection signal that relatively obtains by described detecting device by detecting device; With
By tilt adjustment mechanism tilt described pin fixed support, with the degree of tilt of the lower surface at the edge of regulating each described other object lens around the principal point center with respect to the lower surface at the edge of described object lens, the step of more described detection signal simultaneously.
9. degree of inclination of objective lens control method as claimed in claim 8, wherein said other object lens are fixed on the described retainer by using bonding agent.
10. actuator, be arranged in the optic pick-up, described optic pick-up is used for assembling the laser beam sent from laser diode, with the light beam irradiates information recording carrier of assembling, receive from light and the reproduction and/or the recorded information of information recording carrier reflection, and this actuator has a plurality of object lens that are used for the convergent laser bundle and the retainer that keeps described a plurality of object lens with being used for fixing
Wherein said a plurality of object lens are conditioned degree of tilt and are fixed on the described retainer by method as claimed in claim 8 or 9.
11. an optic pick-up, it is provided with actuator as claimed in claim 10.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007005809 | 2007-01-15 | ||
| JP005809/07 | 2007-01-15 | ||
| JP330128/07 | 2007-12-21 | ||
| JP2007330128A JP4778951B2 (en) | 2007-01-15 | 2007-12-21 | Objective lens tilt adjusting device and objective lens tilt adjusting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101226758A CN101226758A (en) | 2008-07-23 |
| CN101226758B true CN101226758B (en) | 2011-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100029818A Expired - Fee Related CN101226758B (en) | 2007-01-15 | 2008-01-15 | Tilt adjustment device for objective lenses and method of adjusting tilt of objective lenses |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4778951B2 (en) |
| CN (1) | CN101226758B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104637500B (en) * | 2013-11-11 | 2017-10-27 | 三菱电机株式会社 | Lens position detection method and device and lens position adjusting method and device |
| KR20160027852A (en) * | 2014-09-02 | 2016-03-10 | 삼성전기주식회사 | System and method for detecting and compensating tilt angle of lens |
| CN115040238B (en) * | 2022-08-15 | 2022-11-15 | 南昌大学第二附属医院 | Control method of laser positioning equipment for body surface skin damage area and laser positioning equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1721902A (en) * | 2004-06-15 | 2006-01-18 | Tdk株式会社 | Objective lens, actuator, optical head, and optical recording/reproducing apparatus |
-
2007
- 2007-12-21 JP JP2007330128A patent/JP4778951B2/en not_active Expired - Fee Related
-
2008
- 2008-01-15 CN CN2008100029818A patent/CN101226758B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1721902A (en) * | 2004-06-15 | 2006-01-18 | Tdk株式会社 | Objective lens, actuator, optical head, and optical recording/reproducing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101226758A (en) | 2008-07-23 |
| JP4778951B2 (en) | 2011-09-21 |
| JP2008198328A (en) | 2008-08-28 |
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