CN101315782A - Pick up lens carrier, manufacturing method and forming method of pick up lens carrier protective film - Google Patents
Pick up lens carrier, manufacturing method and forming method of pick up lens carrier protective film Download PDFInfo
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- CN101315782A CN101315782A CNA2008100982279A CN200810098227A CN101315782A CN 101315782 A CN101315782 A CN 101315782A CN A2008100982279 A CNA2008100982279 A CN A2008100982279A CN 200810098227 A CN200810098227 A CN 200810098227A CN 101315782 A CN101315782 A CN 101315782A
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- pick
- lens carrier
- lens
- optical recording
- recording media
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Abstract
The invention provides a pick-up lens frame, which can not damage the optical recoding medium even the frame contacts the optical recording medium; and the lens frame can precisely focus the optical recording medium on the hopeful position of the optical recording medium by writing light; thus the frame is suitable for a large amount of the optical recording medium. The pick-up lens frame maintains the pick-up lens and at the same time the frame has the protective film on the optical recording medium; the pick-up lens is used for writing the writing light of the signal on the information recording surface of the optical recoding medium and used for focusing the recorded signal on the information recording surface; the protective film has the resin layer activated by a activating method and a punching absorbing layer formed on the resin layer.
Description
Technical field
The present invention relates to be kept for the formation method of the diaphragm of the manufacture method of pick up lens carrier, pick up lens carrier and pick up lens carrier to the pickup lens that writes and read of optical recording media.
Background technology
In recent years, in order to increase the capacity of optical recording media, the optical recording media of various recording modes is practical.In optical recording media during the jumbo signal of record, the performance requirement that can not write not affected by environmently/read is better than the optical recording media of in the past capacity.Therefore, not only for optical recording media, for write signal in optical recording media and the pick up lens carrier that reads in the pickup lens of the information that writes down in the optical recording media and keep this pickup lens, require that also temperature and humidity are had high tolerance.In addition, for pick up lens carrier, except the high tolerance to environmental change, also require to have agent of low hygroscopicity, dimensional stability and high rigidity, liquid crystal polymer is studied as the material that satisfies such requirement with high standards.
In addition, in optical recording media, require to increase recording density in order to realize high capacity,, must shorten the distance of pickup lens and optical recording media in order to carry out writing/reading of signal with high density.But when the distance of pickup lens and optical recording media shortened, because vibration etc., the pick up lens carrier of pickup lens or maintenance pickup lens can contact with optical recording media.Thus,, also can prevent the damage of optical recording media, study protective seam or guard block are arranged on (patent documentation 1-4) on the pick up lens carrier even contact with optical recording media for the pick up lens carrier vibration.
Patent documentation 1: the spy opens the 2001-319355 communique
Patent documentation 2: the spy opens the 2002-222535 communique
Patent documentation 3: the spy opens the 2002-269790 communique
Patent documentation 4: the spy opens the 2003-272206 communique
But liquid crystal polymer also has high chemical resistance except above-mentioned performance; therefore, in order to form protective seam, even coating has been dissolved in the material for protective layer of solvent (for example organic solvent); also melt surface can't be made, thereby the tack of liquid crystal polymer and protective seam can't be guaranteed.Therefore, when in pick up lens carrier, using liquid crystal polymer, in fact, can't be provided for preventing the protective seam or the guard block of the damage of optical recording media, so be difficult to provide the pick up lens carrier that adapts with jumbo optical recording media.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of pick up lens carrier, it has protective seam, and this protective seam is formed by the material that environmental change is had height endurability, even and contact with optical recording media and also can not make the optical recording media damaged.The present invention also aims to provide a kind of pick up lens carrier, it can be provided with near the optical recording medium quality simultaneously with writing light inlet and reading light focusing correctly on the desirable position on the optical recording media, can adapt to jumbo optical recording media.
In order to solve above-mentioned problem; the invention provides a kind of pick up lens carrier; be used to keep pickup lens; simultaneously partly has diaphragm in the optical recording media side at least; described pickup lens will be used for the light that reads of writing light inlet and being used to read in the signal that writes down on the information recording surface of on the information recording surface of optical recording media write signal and focus on information recording surface; it is characterized in that described diaphragm has the impact absorbing layer that forms on the resin bed that activated through activation method and the resin bed.
According to pick up lens carrier of the present invention, it is characterized in that resin is a thermoplastic resin.
According to pick up lens carrier of the present invention, it is characterized in that resin is a liquid crystal polymer.
According to pick up lens carrier of the present invention, it is characterized in that activation method is laser radiation.
According to pick up lens carrier of the present invention, it is characterized in that laser radiation is an irradiation near infrared region light on resin bed.
According to pick up lens carrier of the present invention, it is characterized in that activation method is a radiation exposure.
According to pick up lens carrier of the present invention, it is characterized in that, make resin bed become plasmoid by activation method.
According to pick up lens carrier of the present invention, it is characterized in that impact absorbing layer is to form by the resin that coating has an impact absorbency.
The invention provides a kind of manufacture method of pick up lens carrier, this pick up lens carrier is used to keep pickup lens, described pickup lens will be used for the light that reads of writing light inlet and being used to read in the signal that writes down on the information recording surface of on the information recording surface of optical recording media write signal and focus on information recording surface, it is characterized in that this manufacture method comprises: the profile that forms the outer shape of pick up lens carrier forms operation, the activation procedure that the side of optical recording media at least in the pick up lens carrier is partly activated by activation method, the impact absorbing layer that forms impact absorbing layer on the part after the activated operation activation forms operation.
The invention provides a kind of formation method of diaphragm of pick up lens carrier; form diaphragm on the part of the side of optical recording media at least of this formation method in pick up lens carrier; described pick up lens carrier is used to keep pickup lens; described pickup lens will be used for the light that reads of writing light inlet and being used to read in the signal that writes down on the information recording surface of on the information recording surface of optical recording media write signal and focus on information recording surface; it is characterized in that this formation method comprises: the activation procedure that the side of optical recording media at least in the pick up lens carrier is partly activated by activation method; form operation with the impact absorbing layer that on the part after the activated operation activation, forms impact absorbing layer.
In pick up lens carrier of the present invention; at least on the part of optical recording media side, has diaphragm; this diaphragm is to have through resin bed after the activation method activation and the impact absorbing layer that forms on resin bed; therefore; even contact with optical recording media; also can suppress damage by the impact absorbency of diaphragm, can be provided with near the optical recording medium quality thus optical recording media.And, by using the resin that has high tolerance for the variation of environment, can will write light inlet and read light focusing correctly on the desirable position on the optical recording media.Thus, can provide the pick up lens carrier that can adapt to jumbo optical recording media.
Description of drawings
Fig. 1 is the stereographic map of the state of pick up lens carrier before forming diaphragm of expression embodiments of the present invention;
Fig. 2 is the stereographic map that is illustrated in the pick up lens carrier of embodiments of the present invention the state after the resin bed activation;
Fig. 3 is illustrated in the stereographic map that forms the state behind the impact absorbing layer in the pick up lens carrier of embodiments of the present invention;
Fig. 4 is the photo of state of end face of the pick up lens carrier of the embodiments of the present invention of expression before the irradiating laser;
Fig. 5 is the photo of state of superficial layer of the pick up lens carrier of the embodiments of the present invention of expression behind the irradiating laser;
Description of reference numerals
10: pick up lens carrier
12: end face
13: superficial layer (resin bed)
14: impact absorbing layer
20: pickup lens
Embodiment
Below, referring to figs. 1 through Fig. 3 the pick up lens carrier 10 that embodiments of the present invention relate to is elaborated.Here, Fig. 1 to Fig. 3 is the stereographic map of structure of the pick up lens carrier of expression embodiments of the present invention.Fig. 1 is the stereographic map that expression forms diaphragm state before.Fig. 2 is the stereographic map of the state after the activation of expression resin bed.Fig. 3 is the stereographic map of the state behind the expression formation impact absorbing layer.Fig. 1 to Fig. 3 is for clear and definite the present invention, represent the shape and the setting of the pickup lens 20 of pick up lens carrier 10 and maintenance merely, but the present invention is not limited to the embodiment shown in these figure.
The pick up lens carrier 10 that present embodiment relates to forms the summary drum of hollow, and portion keeps pickup lens 20 within it, and makes central shaft consistent with optical axis.Pickup lens 20 can be focused on the assigned position in the information recording surface of optical recording media by the work of drive unit (not shown).In write operation, write the light inlet outgoing from light conduct on the afore mentioned rules position of light source (not shown) incident, at the local write signal of irradiation.In read operation, read in the signal that reading of information recording surface write down on the position by pickup lens 20 by reading part (not shown).
Here, the recording medium that the pickup lens 20 that relates to as present embodiment writes and reads, for example can enumerate CD (Compact Disc), digital versatile disc (Digital VersatileDisc), Blu-ray Disc (Blu-ray Disc), high-definition digital general optic disc (High-Definition DigitalVersatile Disc), holographic general optic disc (Holographic Versatile Disc).In addition, pick up lens carrier 10 also can be suitable for the recording medium (for example Magnetooptic recording medium) except that optical recording media.
Pick up lens carrier 10 can be shaped by thermoplastic resin (for example, liquid crystal polymer, tygon, polypropylene, polystyrene) and obtain.As this thermoplastic resin, consider height endurability, agent of low hygroscopicity, high-dimensional stability and high height, preferably as the liquid crystal polymer that when fusion, becomes the thermoplastic resin of mesomorphic state to environmental change (for example variation of temperature, humidity).As liquid crystal polymer, can use for example aromatic polyamide, aromatic polyester, contain the material of ehter bond, imide bond.In addition, even use the situation of liquid crystal polymer, pick up lens carrier 10 also needn't whole be formed by liquid crystal polymer, can be only at the end face 12 of optical recording media side or only in end face 12 and periphery use liquid crystal polymer thereof.
By activation method the superficial layer (resin bed) 13 of end face 12 is carried out activation processing.Activation processing for example can be enumerated, to end face 12 irradiating lasers, to the plasmoidization of end face 12 irradiation radioactive ray (for example, X ray and other electromagnetic radiation line, alpha ray and other particle line) and end face 12.Activation condition can wait arbitrarily according to distance, the writing speed of the kind of optical recording media, pick up lens carrier 10 and pickup lens 20 and optical recording media to be determined.
Under the situation of laser radiation, for example can use ruby, YAG (yttrium aluminium garnet liquid crystal) and other Solid State Laser, carbonic acid, He-Ne and other gas laser, semiconductor laser, pigment and other liquid laser, free-electron laser.For wavelength region may, can use the laser of near infrared ray, infrared ray, visible light, ultraviolet wavelength region may.From the viewpoint of the activation processing of liquid crystal polymer, preferably send the YVO of the light of near infrared wavelength (1064nm)
4(yttrium barium oxide) laser.The superficial layer of implementing after the activation processing 13 be the state that combines with the molecule of outside easily, the while surface coarsening, thereby with the cohesive height (showing fixing effect) of exterior materials (Fig. 2).
The appearance of having represented the superficial layer 13 behind irradiating laser under the following condition among Fig. 5.Fig. 5 compares with Fig. 4 of the state of the prelaser end face 12 of expression, can confirm the state of surface coarsening.Here, Fig. 4 is the photo of state of the end face 12 of the pick up lens carrier 10 of expression before the irradiating laser.Fig. 5 is the photo of the state of the superficial layer 13 after expression activates by laser radiation.These photos are the optical microscope photograph after amplifying 800 times.
＜illuminate condition 〉
Oscillation device: the キ of Co., Ltd. one ェ Application ス system, MD-V9600 YVO
4
Emergent light wavelength: 1064nm
Output: 40-70%
Irradiation speed: 4000-6000 rice/minute
The number of times of the ONOFF of the irradiation of per second: 160-200Hz/ second
Then, laminated formation impact absorbing layer 14 (Fig. 3) on superficial layer 13.The chemical resistance height of liquid crystal polymer, thereby even common laminated shock absorbent also is difficult to fix, but after carrying out activation processing as mentioned above, show on the superficial layer 13 of fixed effect easily fixedly shock absorbent.According to the proterties of shock absorbent, laminated can be by for example with the coating of liquid thing, spraying of gas shape thing or evaporation be implemented.In addition,, for example can use the サ Application コ one ト #GR305VL (trade name) of the lubricated Co., Ltd. of サ Application ェ ス as shock absorbent.This サ Application コ one ト #GR305VL is for being dispersed with the material of polyurethane particles in containing the aqueous urethane resin of acrylate polyvalent alcohol and isocyanates.
According to above operation, in the optical recording media side of pick up lens carrier 10 part, formed protective seam with the resin bed 13 that has activated through activation method and the impact absorbing layer 14 that on this resin bed, forms.
What be coated with impact absorbing layer 14 on superficial layer 13 to the pick up lens carrier 10 of the diaphragm that is provided with said structure and without activation processing relatively uses pick up lens carrier, carries out the tack test of superficial layer 13 and impact absorbing layer 14.The result is, relatively using in the pick up lens carrier, and impact absorbing layer 14 can't be attached on the superficial layer 13, and the tack of 10 samples is all bad.In contrast, in the pick up lens carrier 10 of present embodiment, for 10 samples, impact absorbing layer 14 is securely attached on the superficial layer 13.Can the judgement of tack be to stick on the impact absorbing layer 14 by the adhesive tape that will use always, and peels off with certain power, judge keep then and adhere to.Keeping under the situation of attachment state, judging that attachment state is good, under situation about peeling off, judgement is adhered to bad.
In addition, during tack after test is placed on the pick up lens carrier 10 of present embodiment under the following hot and humid condition, 10 samples are not all found the reduction of tack.In addition, judge tack according to the method described above.
＜experiment condition 〉
Temperature: 60 ℃
Humidity: 95%
Time: 96 hours
In addition, for the pick up lens carrier 10 of present embodiment, as activation processing under the above-mentioned illuminate condition behind superficial layer 13 irradiating lasers, when measuring the change of shape of pick up lens carrier 10,10 samples all are in the scope of specification.
As mentioned above, by being formed on the laminated protective seam that impact absorbing layer 14 is arranged on the superficial layer 13, even pick up lens carrier 10 or pickup lens 20 contact with optical recording media, also can absorbing the impact that contact causes, thereby can prevent the damage of optical recording media.Therefore, can shorten the distance of pick up lens carrier 10 and pickup lens 20 and optical recording media.In addition, owing to used the thermoplastic resin (for example liquid crystal polymer) that has tolerance, agent of low hygroscopicity, dimensional stability and the high rigidity of the variation of environment, can make to write light and read light and on the desirable position on the information recording surface of recording medium, focus.Therefore, can provide at an easy rate and the high capacity of optical recording media, the pick up lens carrier 10 that densification adapts with simple structure.
Claims (10)
1, a kind of pick up lens carrier; this pick up lens carrier is used to keep pickup lens; simultaneously partly has diaphragm in the optical recording media side at least; described pickup lens will be used for focusing on described information recording surface with the light that reads that is used to read in the signal that writes down on the information recording surface at the light inlet of writing of write signal on the information recording surface of optical recording media; it is characterized in that described diaphragm has resin bed that has activated through activation method and the impact absorbing layer that forms on described resin bed.
2, pick up lens carrier according to claim 1 is characterized in that, described resin is a thermoplastic resin.
3, pick up lens carrier according to claim 1 is characterized in that, described resin is a liquid crystal polymer.
4, pick up lens carrier according to claim 1 is characterized in that, described activation method is laser radiation.
5, pick up lens carrier according to claim 4 is characterized in that, described laser radiation is an irradiation near infrared region light on resin bed.
6, pick up lens carrier according to claim 1 is characterized in that, described activation method is a radiation exposure.
7, pick up lens carrier according to claim 1 is characterized in that, makes described resin bed become plasmoid by described activation method.
According to any described pick up lens carrier in the claim 1 to 7, it is characterized in that 8, described impact absorbing layer is to form by the resin that coating has an impact absorbency.
9, a kind of manufacture method of pick up lens carrier, described pick up lens carrier is used to keep pickup lens, described pickup lens will be used for the light that reads of writing light inlet and being used to read in the signal that writes down on the information recording surface of on the information recording surface of optical recording media write signal and focus on information recording surface, it is characterized in that this manufacture method comprises: the profile that forms the outer shape of described pick up lens carrier forms operation, the activation procedure that described at least optical recording media side in the described pick up lens carrier is partly activated by activation method, the impact absorbing layer that forms impact absorbing layer on the part after the activated operation activation forms operation.
10; a kind of formation method of diaphragm of pick up lens carrier; this formation method is to form diaphragm on the part of the side of optical recording media at least in pick up lens carrier; described pick up lens carrier is used to keep pickup lens; described pickup lens will be used for the light that reads of writing light inlet and being used to read in the signal that writes down on the information recording surface of on the information recording surface of optical recording media write signal and focus on information recording surface; it is characterized in that this formation method comprises: the activation procedure that the described at least optical recording media side in the described pick up lens carrier is partly activated by activation method; form operation with impact absorbing layer at formation impact absorbing layer on the part after the described activation procedure activation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007146739A JP2008299990A (en) | 2007-06-01 | 2007-06-01 | Pickup lens holder, manufacturing method of pickup lens holder and forming method of protective film of pickup lens holder |
| JP2007146739 | 2007-06-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101315782A true CN101315782A (en) | 2008-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100982279A Pending CN101315782A (en) | 2007-06-01 | 2008-05-23 | Pick up lens carrier, manufacturing method and forming method of pick up lens carrier protective film |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2008299990A (en) |
| CN (1) | CN101315782A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009032301A (en) * | 2007-07-24 | 2009-02-12 | Pioneer Electronic Corp | Actuator device and optical pickup device |
-
2007
- 2007-06-01 JP JP2007146739A patent/JP2008299990A/en active Pending
-
2008
- 2008-05-23 CN CNA2008100982279A patent/CN101315782A/en active Pending
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| Publication number | Publication date |
|---|---|
| JP2008299990A (en) | 2008-12-11 |
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Open date: 20081203 |