CN100416675C - Optical pick-up apparatus and optical disk apparatus - Google Patents
Optical pick-up apparatus and optical disk apparatus Download PDFInfo
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- CN100416675C CN100416675C CNB2005101377932A CN200510137793A CN100416675C CN 100416675 C CN100416675 C CN 100416675C CN B2005101377932 A CNB2005101377932 A CN B2005101377932A CN 200510137793 A CN200510137793 A CN 200510137793A CN 100416675 C CN100416675 C CN 100416675C
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- collimator lens
- light emitter
- lasing light
- optical
- optical backplane
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Abstract
An exemplary optical pick-up apparatus of the invention comprises: an optical base; a collimator lens provided on the optical base; a laser source disposed adjacent the collimator lens on the optical base and emitting light that produces heat; and temperature gradient control means, provided between the collimator lens and the laser source on the optical base, for flattening temperature gradient between the collimator lens and its surroundings.
Description
The cross reference of related application
The application according to the interests of the right of priority that requires following Japanese patent application: JapanesePatent Application No.2004-381934 filed December 28,2004 and Japanese Patent Application No.2005-289907, filed October 3,2005, the content of these two applications listed in supply intactly reference herein.
Technical field
The present invention relates to a kind of optical pick-up apparatus, especially have a kind of optical pick-up apparatus of one group of semiconductor laser light source etc., and the structure that relates to a kind of optical disc apparatus.
Background technology
When sphere lens uses collimator lens as a shooting, need two or three lens, yet, when using a non-sphere lens to replace, only need lens.Moreover, because resin shows to have the performance that is suitable for forming lens now, a kind of non-sphere lens by resin manufacture is used in a collimator lens now at large, thereby makes supplier's optical articles can satisfy the requirement that they reduce size, weight and the reduction price of product.
Yet, manifesting, temperature difference between lens and its environment produces and strides across a thermograde of lens and cause lens distortion subsequently, usually, by the distortion of lens of resin manufacture distortion greater than lens of making by glass.For example, the heat of the thermal source that is provided with on the next comfortable optical backplane causes significant deformation in a collimator lens, and this kind distortion causes a kind of problematic situation, here to or by the recording of information of a recording medium or duplicate and can not normally carry out.
Usually, if might between the thermal source on a collimator lens and the optical backplane, provide the gap of broad, an optical backplane perhaps is set, and it has the ability to dispel the heat effectively, and the appearance of related with the heat generation as previously discussed problem can be not serious like that.Yet, in having a mind to merge a compactness that enters a notebook personal computer (PC) and the optical pick-up apparatus that approaches, between the thermal source on a collimator lens and the optical backplane, provide the spacing of broad, an optical backplane perhaps is set, and it has the ability to dispel the heat effectively all is inconvenient.Moreover, in an optical pick-up apparatus, it comprises CD (compact disk), DVD (Video CD), HD-DVD (high-density digital videodisc) laser diode, it launches three kinds of light beams of different wavelengths, and the number of thermal source increases, and the possible gap that is used for optical element is restricted, and therefore above-described preferred radiating condition more is difficult to satisfy.
[patent document 1]
Japanese?Patent?Unexamined?Publication?No.2004-133963
[patent document 2]
Japanese?Patent?Unexamined?Publication?No.2003-45059
[patent document 3]
Japanese?Patent?Unexamined?Publication?No.2002-319167
Summary of the invention
The heat dissipation method has been disclosed in patent document 1 (Japanese Patent UnexaminedPublication No.2004-133963), patent document 2 (Japanese PatentUneamined Publication No.2003-45059) and patent document 3 (JapanesePatent Unexamined Publication No.2002-319167), yet, not to need to use aspect the distortion of above-mentioned method collimator lens in preventing an optical pick-up apparatus, this optical pick-up apparatus is a purpose of the present invention, and a series of thermal source wherein is set.
The objective of the invention is to solve heat conduction problem, it appears in the optical pick-up apparatus of above-described common compactness, this device has a series of thermal source, and the optical pick-up apparatus that an object of the present invention is to provide a kind of compactness, it can a smooth collimator lens and optical backplane on thermograde between its environment, so that reduce the distortion of collimator lens, and an optical disc apparatus be provided, merge this optical pick-up apparatus.
According to a first aspect of the present invention, a kind of optical pick-up apparatus is provided, comprising: an optical backplane; A collimator lens is arranged on the end for the optic axis of U font of being bent to form on the optical backplane; A lasing light emitter, by be arranged on the other end that is bent to form to the optic axis of U font on optical backplane with collimator lens in abutting connection with configuration, and to above-mentioned collimator lens irradiates light the time, produce heat; And the permeability hole that forms the high thermal stability element, be arranged between the collimator lens and lasing light emitter of disposed adjacent, be used for the gradient of smooth collimator lens environment temperature.
According to a first aspect of the present invention, the permeability hole that forms the high thermal stability element is provided, it is present between the lasing light emitter on collimator lens and the optical backplane, so that the thermograde between smooth collimator lens and its environment, greatly reduce the heat affecting of lasing light emitter collimation device lens, and the distortion that prevents collimator lens.
According to a second aspect of the present invention, a kind of optical pick-up apparatus is provided, comprising: an optical backplane; A collimator lens is arranged on the end for the optic axis of U font of being bent to form on the optical backplane; A lasing light emitter, by be arranged on the other end that is bent to form to the optic axis of U font on optical backplane with the collimator lens adjacency, and to above-mentioned collimator lens irradiates light the time, produce heat; And the heat dissipation plate that forms the low thermal stability element, be set on the contrary with collimator lens with respect to lasing light emitter, be used to make the heat dissipation of above-mentioned lasing light emitter.According to a second aspect of the present invention, the heat dissipation plate that forms the low thermal stability element is arranged on the optical backplane opposite with collimator lens with respect to lasing light emitter, so that allow the thermograde between collimator lens and its environment greatly smooth, reduce the heat affecting of lasing light emitter collimation device lens, and the distortion that prevents collimator lens.
According to a third aspect of the present invention, a kind of optical pick-up apparatus is provided, comprising: an optical backplane; A collimator lens is arranged on the end for the optic axis of U font of being bent to form on the optical backplane; A lasing light emitter, by be arranged on the other end that is bent to form to the optic axis of U font on optical backplane with the collimator lens adjacency, and to above-mentioned collimator lens irradiates light the time, produce heat; Form the permeability hole of high thermal stability element, be arranged between the collimator lens and lasing light emitter of disposed adjacent, be used for the gradient of smooth collimator lens environment temperature; And the heat dissipation plate that forms the low thermal stability element, be set on the contrary with collimator lens with respect to lasing light emitter, be used to make the heat dissipation of above-mentioned lasing light emitter.According to a third aspect of the present invention, the permeability hole that forms the high thermal stability element is arranged between collimator lens and the lasing light emitter, and the heat dissipation plate that forms the low thermal stability element is arranged on opposite with collimator lens with respect to lasing light emitter, they are worked together greatly reducing the heat affecting of lasing light emitter collimation device lens, and the distortion that prevents collimator lens.
According to a fourth aspect of the present invention, a kind of optical pick-up apparatus is provided, comprising: an optical backplane; A collimator lens is arranged on the end for the optic axis of U font of being bent to form on the optical backplane; A lasing light emitter, by be arranged on the other end that is bent to form to the optic axis of U font on optical backplane with the collimator lens adjacency, and to above-mentioned collimator lens irradiates light the time, produce heat; Form the permeability hole of high thermal stability element, be arranged between the collimator lens and lasing light emitter of disposed adjacent, be used for the gradient of smooth collimator lens environment temperature; Form the heat dissipation plate of low thermal stability element, be set on the contrary with collimator lens, be used to make the heat dissipation of above-mentioned lasing light emitter with respect to lasing light emitter; And support, this support has gap as heat insulating member at the leading flank of optical backplane, at the trailing flank of optical backplane lasing light emitter is installed.
According to a first aspect of the present invention, the leveling of thermograde makes between collimator lens and its environment might provide an optical pick-up apparatus, it can allow collimator lens to have the thermograde of the minimum that strides across lens, and the distortion that greatly reduces collimator lens, and an optical disc apparatus is provided, merge this optical pick-up apparatus.
Description of drawings
Fig. 1 is a skeleton view, and the structure of one embodiment of the present of invention is shown;
Fig. 2 is a synoptic diagram that concerns between collimator lens in the structure shown in Figure 1 and the thermal source;
Fig. 3 A is a synoptic diagram, and the structure of an alternative embodiment of the invention is shown;
Fig. 3 B is a synoptic diagram, and the structure of an alternative embodiment of the invention is shown; And
Fig. 4 is a skeleton view, and the structure of an alternative embodiment of the invention is shown.
Embodiment
Various embodiments of the present invention will make an explanation with reference to accompanying drawing below.Fig. 1 illustrates structure behind according to an optical pick-up apparatus of one embodiment of the present of invention one.
In order to make an optical disc apparatus compactness, DVD lasing light emitter 11, HD-DVD lasing light emitter 12 and CD lasing light emitter LD are arranged on the optical backplane 10, and an optical detector 13 also is set near these lasing light emitters, shown in Fig. 1.These lasing light emitters 11,12, LD is a thermal source, emission of lasering beam, it can produce heat and optical detector 13 is thermals source, receives laser beam, and it can produce heat.Especially, as described later, an optic axis forms " U " font, be positioned at the gap of a possible restriction on the optical backplane 10, and DVD lasing light emitter 11 and a collimator lens 14 be set to located adjacent one another and relative terminal near around optic axis, so that allow the optical pick-up apparatus can be compact.In addition, cause a thermograde that strides across collimator lens when the heat that comes self-excitation light source 11 to conduct to collimator lens 14, and the distortion that causes collimator lens, this distortion produces a problematic situation, here to or by the recording of information of a recording medium or duplicate and can not normally carry out.
In the present embodiment, a permeability hole 15 is formed in the part of optical backplane 10, between collimator lens 14 and DVD lasing light emitter 11.Permeability hole 15 is as the effect of a high thermal stability element, has high thermal stability, and the heat affecting that can reduce lasing light emitter 11 collimation device lens 14 significantly, therefore and reduce temperature difference between collimator lens 14 and its environment, cause thermograde that reduces consumingly between them.Prevent the distortion of collimator lens 14 like this.
In optical pick-up apparatus, a laser beam by lasing light emitter 11 emissions is reflected by one first recombination dichroic elements 11d, advance by a polarized beam beam splitter 12d, by one second recombination dichroic elements 13d reflection, advance by collimator lens 14, by 16 reflections of a projecting mirror, objective lens of transmission (is represented with " OL " in Fig. 4, and is radiated on the CD.Subsequently, advance by the first recombination dichroic elements 11d polarized beam beam splitter 12d by a laser beam of lasing light emitter 12 emissions, by second recombination dichroic elements 13d reflection, advance by collimator lens 14, reflected by projecting mirror 16, transmission objective lens OL, and be radiated on the CD.
Moreover, by a laser beam of CD lasing light emitter emission, advance by the second recombination dichroic elements 13d, advance by collimator lens 14, reflected by projecting mirror 16, transmission objective lens OL, and be radiated on the CD.
Subsequently, by DVD, HD-DVD, the corresponding bombardment with laser beams of CD lasing light emitter emission is to CD, by CD reflection and by DVD, HD-DVD lasing light emitter emitted laser bundle and received by optical detector 13 by the laser beam of CD reflection, and received (not shown) by other optical detector by CD lasing light emitter emitted laser bundle.
As previously discussed, optical pick-up apparatus is to construct like this, focus to a bundle point on a CD by a laser beam of lasing light emitter emission, and optical detector receives the laser beam by CD reflection, so that allow this device to proceed to or thus CD recording of information or duplicate, and this optical pick-up apparatus is integrated with an optical disc apparatus.
Referring to Fig. 1, the motion of optical pick-up apparatus is by a first mandrel MA guiding, and this mandrel is directly driven such as a motor by a drive source, and a secondary mandrel SA, is set to be parallel to first mandrel MA.
In above-described embodiment, permeability hole 15 can reduce the heat affecting of DVD lasing light emitter 11 collimation device lens 14 significantly, so that smooth thermograde between collimator lens 14 and its environment.Yet,, a high thermal stability element is set according to the present invention, it has high thermal stability, and includes, but are not limited to permeability hole, be suppressed at the heat conduction between collimator lens 14 and the lasing light emitter 11, allow the thermograde between collimator lens 14 and its environment smooth.According to the present invention, thermograde smooth makes and might produce an even temperature profile that strides across collimator lens 14 itself between collimator lens 14 and its environment, and the distortion that therefore prevents collimator lens 14.
Fig. 2 is a synoptic diagram of relation between these thermals source and the collimator lens 14.Reflected by the second recombination dichroic elements 13d by DVD lasing light emitter 11 and HD-DVD lasing light emitter 12 emitted laser bundles, advance by collimator lens 14, and enter objective lens OL.The laser beam transmission second recombination dichroic elements 13d by CD lasing light emitter LD emission advances by collimator lens 14, transmission objective lens OL, and enter CD.Laser beam transmission objective lens OL by CD reflection advances by collimator lens 14, by second recombination dichroic elements 13d reflection, and enters optical detector 13.
Moreover, as illustrated in fig. 1 and 2, on optical backplane 10, an optic axis " a " is being extended to a direction of the side of secondary mandrel SA point-blank by the side of first mandrel MA in the gap of a restriction, an optic axis " b " crosscut optic axis " a ", and to a direction of the periphery of optical backplane 10, extending point-blank, an and optic axis " c " crosscut optic axis " b ", and to a direction of the side of first mandrel MA, extending point-blank by an optic axis, this optic axis has " U " font, and by optic axis " a ", " b " and " c " forms.On the side of first mandrel MA, DVD lasing light emitter 11 is arranged on the optic axis " c " near the end portion of optic axis " a " and " c ", neighboring near optical backplane 10, and collimator lens 14 is arranged on the optic axis " a ", inside circumference near optical backplane 10, and lasing light emitter 11 and collimator lens 14 are orientated as and are adjacent to each other and approaching subsequently, and it is compact allowing optical pick-up apparatus.In addition, permeability hole 15 is arranged on the optical backplane 10 between DVD lasing light emitter 11 and collimator lens 14.
Fig. 3 A and 3B are synoptic diagram, and an alternative embodiment of the invention is shown.Shown in Fig. 3 B, a DVD lasing light emitter 31 is arranged on a laser diode (LD) support 32, and it is by a kind of high thermal stability made with by the trailing flank support laser source of optical backplane.Moreover shown in Fig. 3 A, the part 35 of LD support 32 is inserted near a direction of the trailing flank of optical backplane 10 and is fixed to optical backplane 10, and gap 33 is arranged on the leading flank of optical backplane 10.The heat conduction that allows LD support 32 and gap 33 to suppress like this by lasing light emitter 31, thus prevent from the heat of self-excitation light source 31 to reach collimator lens.
Should be appreciated that as previously discussed, have two kinds of methods to be used in and prevent that heat conduction is to collimator lens 14.Here it is, first method as previously discussed, purpose is to prevent the heat affecting of lasing light emitter 11,31 collimation device lens 14, and the second method purpose is the heat of dissipation on lasing light emitter 11 sides, to prevent the heat affecting of lasing light emitter collimation device lens 14.
Another embodiment of the present invention is used to realize that second method is shown in Fig. 4.Fig. 4 is an outside drawing (being the leading flank of optical pick-up apparatus), when observing by the trailing flank of structure shown in Figure 1, and in the present embodiment, a low thermal stability element is set to opposite with collimator lens 14 with respect to DVD lasing light emitter 11 such as a heat dissipation plate 41.Heat by 11 emissions of DVD lasing light emitter allows to escape by heat dissipation plate 41, thereby reduces the heat affecting of collimation device lens 14.If this heat dissipation plate 41 is to assemble before lasing light emitter is connected to optical backplane, accurately connect lasing light emitter 11 to optical backplane and be unusual difficulty, therefore, preferably the assembling of dissipation plate is to carry out after lasing light emitter 11 has been aimed at and regulated with respect to other parts.
Embodiment shown in embodiment shown in the possible constitutional diagram 1 and Fig. 4.Here it is, when by DVD lasing light emitter 11 to the most heat conduction of collimator lens 14 by the high thermal stability element, when thermally-stabilised, high heat-conduction component is arranged on opposite with collimator lens 14 with respect to DVD lasing light emitter 11 such as heat dissipation plate 41 such as permeability hole 15.So more effectively prevent the heat affecting of lasing light emitter 11 collimation device lens 14.
Should be appreciated that, in the above-described embodiment, DVD lasing light emitter 11 is provided as a thermal source, abut against on the optical backplane 10 collimator lens 14 as shown in FIG., yet thermal source is not limited to DVD lasing light emitter 11, and can be the element of any kind, its emission produces the light of heat, or receives the light that produces heat.
The present invention not only can be used in an optical pick-up apparatus, and this device can be surveyed the light beam of three wavelength, and can be used in an optical pick-up apparatus, and this device can be surveyed the light beam of two wavelength, and is used in a general optical pick-up apparatus.
As so far the above, optical pick-up apparatus of the present invention comprises thermal source, be arranged on the optical backplane 10 in abutting connection with above-mentioned collimator lens 14, and emission produces the light of heat or receives the light that produces heat, and thermograde control device 15, be arranged on the optical backplane 10, be used for smooth thermograde between collimator lens 14 and its environment.Thermograde between above-mentioned collimator lens 14 and its environment smooth causes striding across the thermograde of the minimum of collimator lens 14, cause the remarkable minimizing of the distortion of collimator lens 14, in addition, limit in the limited gap of an optic axis on optical backplane 10, it is adjacent one another are near that thereby the thermal source that allows above-mentioned collimator lens 14 and emission to produce the light of heat or receive the light that produces heat is set to, thus cause optical pick-up apparatus and therefore optical disc apparatus be compact.
The present invention is not limited to the above embodiments, and under the condition that does not break away from the spirit and scope of the present invention, can make different changes.
Claims (4)
1. optical pick-up apparatus comprises:
An optical backplane;
A collimator lens is arranged on the end for the optic axis of U font of being bent to form on the optical backplane;
A lasing light emitter, by be arranged on the other end that is bent to form to the optic axis of U font on optical backplane with collimator lens in abutting connection with configuration, and to above-mentioned collimator lens irradiates light the time, produce heat; And
Form the permeability hole of high thermal stability element, be arranged between the collimator lens and lasing light emitter of disposed adjacent, be used for the gradient of smooth collimator lens environment temperature.
2. optical pick-up apparatus comprises:
An optical backplane;
A collimator lens is arranged on the end for the optic axis of U font of being bent to form on the optical backplane;
A lasing light emitter, by be arranged on the other end that is bent to form to the optic axis of U font on optical backplane with the collimator lens adjacency, and to above-mentioned collimator lens irradiates light the time, produce heat; And
Form the heat dissipation plate of low thermal stability element, be set on the contrary with collimator lens, be used to make the heat dissipation of above-mentioned lasing light emitter with respect to lasing light emitter.
3. optical pick-up apparatus comprises:
An optical backplane;
A collimator lens is arranged on the end for the optic axis of U font of being bent to form on the optical backplane;
A lasing light emitter, by be arranged on the other end that is bent to form to the optic axis of U font on optical backplane with the collimator lens adjacency, and to above-mentioned collimator lens irradiates light the time, produce heat;
Form the permeability hole of high thermal stability element, be arranged between the collimator lens and lasing light emitter of disposed adjacent, be used for the gradient of smooth collimator lens environment temperature; And
Form the heat dissipation plate of low thermal stability element, be set on the contrary with collimator lens, be used to make the heat dissipation of above-mentioned lasing light emitter with respect to lasing light emitter.
4. optical pick-up apparatus comprises:
An optical backplane;
A collimator lens is arranged on the end for the optic axis of U font of being bent to form on the optical backplane;
A lasing light emitter, by be arranged on the other end that is bent to form to the optic axis of U font on optical backplane with the collimator lens adjacency, and to above-mentioned collimator lens irradiates light the time, produce heat;
Form the permeability hole of high thermal stability element, be arranged between the collimator lens and lasing light emitter of disposed adjacent, be used for the gradient of smooth collimator lens environment temperature;
Form the heat dissipation plate of low thermal stability element, be set on the contrary with collimator lens, be used to make the heat dissipation of above-mentioned lasing light emitter with respect to lasing light emitter; And
Support, this support has gap as heat insulating member at the leading flank of optical backplane, at the trailing flank of optical backplane lasing light emitter is installed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004381934 | 2004-12-28 | ||
| JP2004381934 | 2004-12-28 | ||
| JP2005289907 | 2005-10-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1822143A CN1822143A (en) | 2006-08-23 |
| CN100416675C true CN100416675C (en) | 2008-09-03 |
Family
ID=36923441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101377932A Expired - Fee Related CN100416675C (en) | 2004-12-28 | 2005-12-28 | Optical pick-up apparatus and optical disk apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100416675C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339156A (en) * | 1999-10-29 | 2002-03-06 | 松下电器产业株式会社 | Optical head and optical head feeder |
| JP2002319167A (en) * | 2001-04-23 | 2002-10-31 | Sanyo Electric Co Ltd | Optical pickup device |
| CN1497556A (en) * | 2002-10-08 | 2004-05-19 | 日本先锋公司 | Pick-up device |
| CN1160714C (en) * | 1998-10-02 | 2004-08-04 | 三星电子株式会社 | Optical pick device for controlling light beam deflection and beam angle in disc driving device |
-
2005
- 2005-12-28 CN CNB2005101377932A patent/CN100416675C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1160714C (en) * | 1998-10-02 | 2004-08-04 | 三星电子株式会社 | Optical pick device for controlling light beam deflection and beam angle in disc driving device |
| CN1339156A (en) * | 1999-10-29 | 2002-03-06 | 松下电器产业株式会社 | Optical head and optical head feeder |
| JP2002319167A (en) * | 2001-04-23 | 2002-10-31 | Sanyo Electric Co Ltd | Optical pickup device |
| CN1497556A (en) * | 2002-10-08 | 2004-05-19 | 日本先锋公司 | Pick-up device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1822143A (en) | 2006-08-23 |
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Owner name: TOSHIBA SAMSUNG STORAGE TECHNO Free format text: FORMER OWNER: TOSHIBA SAMSUNG STORAGE TECHNO. Effective date: 20141125 |
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