CN101529300B - Optical element, resin molding metal die and optical element manufacturing method - Google Patents
Optical element, resin molding metal die and optical element manufacturing method Download PDFInfo
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- CN101529300B CN101529300B CN2007800400572A CN200780040057A CN101529300B CN 101529300 B CN101529300 B CN 101529300B CN 2007800400572 A CN2007800400572 A CN 2007800400572A CN 200780040057 A CN200780040057 A CN 200780040057A CN 101529300 B CN101529300 B CN 101529300B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/22—Apparatus or processes for the manufacture of optical heads, e.g. assembly
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- General Physics & Mathematics (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Lens Barrels (AREA)
- Optical Head (AREA)
Abstract
The present invention discloses an optical element, a resin molding metal die for forming the optical element and a method for manufacturing the optical element. The optical element is provided with an optical functional section and a flange section. The optical functional section is provided with a first optical functional surface and a second optical functional surface facing each other, and the first optical functional surface has a curvature smaller than that of the second optical functional surface. The surface of the flange section on the second optical functional surface side is provided with a surface to be a mounting reference surface at the time of mounting to a mirror frame, and a step which becomes lower as it goes away from an optical axis.
Description
Technical field
The present invention relates to optical element and be used for the die for molding resin of this optical element of moulding.
Background technology
Be used for optical take-up apparatus that optical information recording medias such as CD, DVD are write down or regenerate, optical element object lens wherein use the plastic lens of resin forming.
Compare with the glass model lens, plastic lens proportion is little can lightweight.Therefore, can alleviate burden, also have the advantage of the little easy raising responsiveness of moment of inertia the driver that drives lens.
As objective lens for optical pickup device with resin forming, there is a kind of plastic lens to be disclosed, it is to establish flange part in the periphery of lens, when picture frame and bobbin are installed and picture frame and bobbin bump between the datum clamp face that connects and the lens face (optical function face) and establish recess (for example with reference to patent documentation 1).
Figure 12 is the pattern sectional views of the formed in mould object lens 30 with record in the technology (patent documentation 1) in the past when being installed on the picture frame 31 of optical take-up apparatus.
Plastic lens in the above-mentioned patent documentation 1 is because be to form with different moulds to the datum clamp face of picture frame and optical function face, so exist the relative datum clamp face of optical function face to produce the problem of inclination.The inclination here is the inclination of relative ideal optical axis.In addition, plastic lens produces deformation the recess during from mold releasability, and the flatness of installed surface worsens, and therefore produces the problem of lens to the installation stability deterioration of picture frame.Because the initial performance of coma aberration and the major subjects of the easy deterioration of stability appear in these problems, result.
In recent years, the CD of high memory capacity and the optical take-up apparatus that uses this CD practicability as Blu-ray Disc (BD), depression on the Blu-ray Disc (BD) is than the high density more of DVD in the past, uses near the bluish violet color laser the 400nm, and the NA value of object lens is in 0.85 degree.Employed object lens when the record of the high memory capacity CD of this use bluish violet color laser or regeneration, its NA value must be higher than and CD and corresponding object lens of DVD in the past.
The NA value is high more, and the coma aberration amount cause of tilting is big more, during the situation of the object lens corresponding with the high memory capacity CD that uses above-mentioned bluish violet color laser, suppresses this coma aberration and becomes and be even more important.
Patent documentation 1:(Japan) spy opens the 2002-200654 communique
Summary of the invention
The present invention in view of the above problems, so that a kind of mould and optical element to be provided is purpose, wherein, mould is when plastic lens molding, alleviate the inclination of the relative datum clamp face of optical function face, guarantee the flatness of datum clamp face simultaneously, the result can improve the initial performance and the stability of coma aberration, optical element is to use described mould molding, although be that high NA value has stable optical property.
In addition, when central module (the type heart) that mould is divided into inserts portion for the difficulty that reduces Mould Machining and circumferential component (die cavity),, must establish a gap (clearance) on the border of two parts in order in circumferential component, to embed central module.Like this, resin enters this gap when worrying the lens moulding, at the burr of datum clamp face side generation optical axis direction.When installing to lens on the bobbin of driver and the picture frame, because this burr contact bobbin and picture frame, lens may tilt to install on the picture frame, have the problems such as installation accuracy reduction of lens.
At this, the present invention is a purpose with the mould that a kind of optical element and this optical element of moulding are provided further in view of the above problems, and wherein, even mould is divided into central module and circumferential component, also not run-off the straight when lens are installed can improve installation accuracy.
Above-mentioned purpose is reached by the invention of following record.
1. optical element, has optical function portion and at the flange part of this optical function portion periphery, the NA value of described optical function portion is more than 0.7, optical element is characterised in that, described optical function portion has the 1st optical function face and the 2nd optical function face that faces toward mutually, described the 1st optical function face is littler than described the 2nd optical function curvature of face, on the face of described the 2nd optical function face side of described flange part, is provided with 2 steps that highly reduce with away from optical axis at least.
2.1 the optical element of middle record is characterized in that, the face of described the 2nd optical function face side of described flange part is reference field when installing to picture frame.
3.1 or in 2 the record optical element, it is characterized in that formula meets the following conditions.
0.4＜L
f1/L
fA＜1.0
Wherein, L
F1Represent in the face of described the 2nd optical function face side of described flange part, in abutting connection with the face of described the 2nd optical function face length (mm), L in the optical axis vertical direction
FAExpression flange part integral body is in the length (mm) of optical axis vertical direction.
4.1 the optical element of putting down in writing in any one of～3 is characterized in that, the face of described flange part and described the 2nd optical function face adjacency is highly the highest face in the described flange part of described the 2nd optical function face side.
5.1 the optical element of putting down in writing in any one of～4 is characterized in that, on the face of described the 1st optical function face side of described flange part, is provided with a plurality of recesses or protuberance.
6.1 the optical element of putting down in writing in any one of～5 is characterized in that, the height of described the 1st optical function face on optical axis is more outstanding than the face of described the 1st optical function face side of described flange part.
7.1 the optical element of putting down in writing in any one of～6 is characterized in that, on the face perpendicular to described optical axis that forms on the described flange part of described the 2nd optical function face side, having surfaceness Ry is the following part of 0.3 μ m.
8. die for molding resin, manufacturing has optical function portion and at the flange part of this optical function portion periphery, and the NA value of described optical function portion is at the optical element more than 0.7, die for molding resin is characterised in that, described die for molding resin does not stay the 2nd mold of described optical element when leaving the 1st mold of described optical element and die opening state when having die opening state, described optical function portion has the 1st optical function face and the 2nd optical function face that faces toward mutually, described the 1st optical function face is littler than described the 2nd optical function curvature of face, form described the 1st optical function face and described the 2nd optical function face by described the 1st mold and described the 2nd mold respectively, on described the 1st mold, establish ejection part, ejecting described flange part makes described optical element from described the 1st mold demoulding, described the 2nd mold has the central module that contains optical axis and its peripheral circumferential component at least, forms described the 2nd optical function face of described optical element and at least a portion of described flange part together with the described central module of described the 2nd mold.
9.8 the die for molding resin of middle record is characterized in that, formula meets the following conditions.
0.4＜L
f1/L
fA＜1.0
Wherein, L
F1Represent in the face of described the 2nd optical function face side of described flange part, in abutting connection with the face of described the 2nd optical function face length (mm), L in the optical axis vertical direction
FAExpression flange part integral body is in the length (mm) of optical axis vertical direction.
10.8 or in 9 the record die for molding resin, it is characterized in that the face of described flange part and described the 2nd optical function face adjacency is highly the highest face in the described flange part of described the 2nd optical function face side.
11.8 the die for molding resin of putting down in writing in any one of～10 is characterized in that, at least a portion of the optical axis vertical plane of the described flange part of described central module moulding.
12.11 middle record die for molding resin, it is characterized in that, other parts of the face of the described flange part that described circumferential component moulding is vertical with optical axis, face by the flange part of described circumferential component moulding, with compare by the face of the flange part of described central module moulding, be positioned at described the 1st optical function face side.
13.12 middle record die for molding resin, it is characterized in that the suitable position of described flange part of described central module has step, the suitable position of described flange part of described circumferential component is formed the height different with described step.
14. optical element, has optical function portion and at the flange part of this optical function portion periphery, the NA value of described optical function portion is more than 0.7, optical element is characterised in that, described optical function portion has the 1st optical function face and the 2nd optical function face that faces toward mutually, described the 1st optical function face is littler than described the 2nd optical function curvature of face, on the face of described the 2nd optical function face side of described flange part, is provided with 1 step that highly reduces with away from optical axis at least.
15.14 the optical element of middle record is characterized in that, the face of described the 2nd optical function face side of described flange part is reference field when installing to picture frame.
16.14 or in 15 the record optical element, it is characterized in that formula meets the following conditions.
0.4＜L
f1/L
fA＜1.0
Wherein, L
F1Represent in the face of described the 2nd optical function face side of described flange part, in abutting connection with the face of described the 2nd optical function face length (mm), L in the optical axis vertical direction
FAExpression flange part integral body is in the length (mm) of optical axis vertical direction.
17.14 the optical element of putting down in writing in any one of～16 is characterized in that, the face of described flange part and described the 2nd optical function face adjacency is highly the highest face in the described flange part of described the 2nd optical function face side.
18.14 the optical element of putting down in writing in any one of～17 is characterized in that, on the face of described the 1st optical function face side of described flange part, is provided with a plurality of recesses or protuberance.
19.14 the optical element of putting down in writing in any one of～18 is characterized in that, the height of described the 1st optical function face on optical axis is more outstanding than the face of described the 1st optical function face side of described flange part.
20.14 the optical element of putting down in writing in any one of～19 is characterized in that, on the face perpendicular to described optical axis that forms on the described flange part of described the 2nd optical function face side, having surfaceness Ry is the following part of 0.3 μ m.
21. optical element manufacture method, make optical element with die for molding resin, optical element has optical function portion and at the flange part of this optical function portion periphery, and the NA value of described optical function portion is more than 0.7, the optical element manufacture method is characterised in that, comprise following operation: fixing operation, described die for molding resin has and ejects the ejection part that described flange part makes it the demoulding, simultaneously, described die for molding resin is made of the 1st mold and the 2nd mold, described the 1st mold leaves described optical element under die opening state, described the 2nd mold has central module and its peripheral circumferential component that forms optical function face and described flange part at least a portion together, and under die opening state, do not stay described optical element, the curvature of the optical function face that forms by described the 1st mold, curvature less than the optical function face that forms by described the 2nd mold, adjust the described central module of described the 2nd mold and the position relation of described circumferential component in advance, use the relative position relation of being hoped to fix; Molding procedure, the described optical element of moulding; Stripping process, after the die sinking, the described flange part that is ejected described optical element by described ejection part carries out the demoulding; The feature of optical element manufacture method is that also formula meets the following conditions.
0.4＜L
f1/L
fA＜1.0
Wherein, L
F1Represent in the face of described the 2nd optical function face side of described flange part, in abutting connection with the face of described the 2nd optical function face length (mm), L in the optical axis vertical direction
FAExpression flange part integral body is in the length (mm) of optical axis vertical direction.
According to the present invention, can provide a kind of can precision moulding datum clamp face well, can improve the initial performance and the stability of coma aberration, reduced the mould of processing difficulty, and the optical element that has roadholding by this formed in mould (even high NA value also)
In addition,, when lens are installed to picture frame, do not produce inclination yet, can improve the optical element of installation accuracy even can provide a kind of mould to be divided into central module and circumferential component, and the mould of this optical element of moulding.
Description of drawings
Fig. 1: the objective lens for optical pickup device of the optical element that relates to for present embodiment, the side schematic view of one example.
Fig. 2: the schematic configuration schematic cross-section that is used for making the die for molding resin of object lens shown in Figure 1.
Fig. 3: die for molding resin die opening state shown in Figure 2 and ejection part working state schematic representation 3 (a), 3 (b).
Fig. 4: with the object lens synoptic diagram 4 (a) that has the cast gate state, 4 (b) of die for molding resin manufacturing shown in Figure 2.
Fig. 5: when the spue line of mould shown in Figure 2 is located between flange part thickness, the mold shape cross section enlarged diagram of flange part periphery.
Fig. 6: the objective lens for optical pickup device of the optical element that relates to for present embodiment, the side schematic view of its other examples.
Fig. 7: the schematic configuration schematic cross-section that is used for making the die for molding resin of object lens shown in Figure 6.
Fig. 8: die for molding resin die opening state shown in Figure 7 and ejection part working state schematic representation 8 (a), 8 (b).
Fig. 9: with the object lens synoptic diagram 9 (a) that has the cast gate state, 9 (b) of die for molding resin manufacturing shown in Figure 7.
Figure 10: when the spue line of mould shown in Figure 7 is located between flange part thickness, the mold shape cross section enlarged diagram of flange part periphery.
Figure 11: with the object lens of die for molding resin moulding shown in Figure 2, pattern cross section Figure 11 (a), 11 (b) when being installed into the picture frame of optical take-up apparatus.
Figure 12: with the formed in mould object lens of putting down in writing in the technology in the past, the pattern sectional view when being installed into the picture frame of optical take-up apparatus.
Figure 13: other of the spue line of mould shown in Figure 2 are set example, the mold shape cross section enlarged diagram of flange part periphery wherein.
Figure 14: other of the spue line of mould shown in Figure 7 are set example, the mold shape cross section enlarged diagram of flange part periphery wherein.
Figure 15: with the object lens of die for molding resin moulding shown in Figure 7, pattern cross section Figure 15 (a), 15 (b) when being installed into the picture frame of optical take-up apparatus.
Embodiment
Below describe the present invention in detail by embodiment, but the present invention is not limited to this.
Fig. 6 is the objective lens for optical pickup device of the optical element that relates to of present embodiment, the side schematic view of its first example.
Objective lens for optical pickup device 1 shown in Figure 6 (the following object lens that claim again) has optical function face 1a, the optical function face 1b for optical function portion, and the flange part 1f that is formed on this optical function face periphery.Below the situation with circular optical function face and round flange portion is described, but also can form the flange part 1f that part and profile are rectangle.Can also on the one side at least of optical function face, form diffraction surfaces aplanatism difference and pay structure with ring-band shape step.
Preferred disposition object lens 1 shown in Figure 6 are that optical function face 1b faces toward CD in optical take-up apparatus, and optical function face 1a is facing to light source.Optical function face 1b facing to CD in the present embodiment is equivalent to the 1st optical function face, and the optical function face 1a that faces toward light source is equivalent to the 2nd optical function face.
As shown in Figure 6, preferred the 2nd optical function face (optical function face 1a) specific surface is big to the 1st optical function face (the optical function face 1b) curvature of CD, and effective diameter is that the 2nd optical function face (optical function face 1a) is greater than the 1st optical function face (optical function face 1b).The effective diameter of preferred the 2nd optical function face is more than the 0.3mm, below the 7mm, more preferably more than the 0.5mm, below the 4mm.
As shown in the figure, flange part 1f has formed flange surface 1f
0With the 1st step 1f
1, wherein, flange surface 1f
0Be the 2nd optical function face (optical function face 1a) side perpendicular to the face of optical axis O, the 1st step 1f
1At flange surface 1f
0Outside and have step in the CD side.Preferably the 1st step being set as when optical axis direction is seen object lens is to be the concentric circles at center with the optical axis.
Figure 15 (a), 15 (b) are object lens 1 shown in Figure 6 model utility sectional views when being installed into the picture frame of pick device.Figure 15 (a) represents whole, and Figure 15 (b) is a flange part 1f periphery enlarged diagram.
Shown in Figure 15 (a), make the flange surface 1f of flange part 1f
0Run into picture frame 31, fixedly object lens 1.That is, by being the flange surface 1f that the mould 12 of central module forms in the die for molding resin sectional view shown in Figure 7
0, be the reference field when installing to picture frame.In addition, the 1st step 1f
1Do not run into picture frame 31, between gapped.
Shown in Figure 15 (b) is the flange surface 1f of datum clamp face
0The preferred 0.10～0.80mm of radial width A about, more preferably about 0.20～0.50mm.The 1st step 1f
1The preferred 0.01～0.20mm of radial width B about, more preferably about 0.05～0.15mm.And, with flange surface 1f
0Be benchmark, the 1st step 1f
1At the step amount D of optical axis direction, be no more than the scope of flange surface 1f0, preferably about 0.005～0.20mm, more preferably about 0.02～0.06mm at the thickness of optical axis direction.Flange surface 1f
0At the thickness of optical axis direction, about preferred 0.2～1.50mm, more preferably about 0.2～1.00mm.In addition, preferred flange face 1f
0With the 1st step 1f
1Joint face parallel with optical axis.
In addition, the flange surface 1f that preferably forms by central module mould 12 at least
0, near on the part of optical axis side, have the part of surfaceness Ry below 0.3 μ m at least.Flange surface 1f
1Can be surfaceness Ry below 0.3 μ m, can not be yet.More preferably have the part of surfaceness Ry below 0.1 μ m.Surfaceness Ry is meant, in affiliated face small concavo-convex, from the height that pushes up to the top at the bottom of the lowest trough.In addition, also can be that surfaceness Ry is more than 0.3 μ m with equidirectional of optical axis or taper surface between the step.
Reaffirm that Fig. 7 is the schematic configuration schematic cross-section that is used for making the die for molding resin of object lens 1 shown in Figure 6.
Die for molding resin shown in Fig. 7 is the boundary with spue line PL, and the 1st mold is made of mould 11, and the 2nd mold is made of mould 12 and mould 14.In addition, be that the mould 11 of the 1st mold is equivalent to movable side mold, be the mould 12 and the mould 14 of the 2nd mold is equivalent to fixed side mold.
Mould 14 moulds 12 constitute inserts portion relatively.Mould 12 forms shape 12a and flange surface 1f
0, wherein, shape 12a is used for forming optical function face 1a (the 2nd optical function face), and it is a big optical function face of effective diameter in the optical function face of object lens 1, flange surface 1f
0It is the datum clamp face in the face of flange part 1f the 2nd optical function face side.In addition, mould 14 forms step 1f
1That is to say that the border of mould 12 and mould 14 is flange surface 1f of datum clamp face
0With step 1f
1The boundary line.In addition, optical function face 1a (the 2nd optical function face) be the flange surface 1f of datum clamp face
0The face of the 2nd optical function face side between, do not form recess, form the shape that extended line separately intersects.In other words, the face 1f of 1f of preferred flange portion and the 2nd optical function face 1a adjacency
0, being formed is flange part 1f (1f in the 2nd optical function face side
0, 1f
1) in highly the highest face.The what is called " 1f here
0The height height ", be to call height being positioned at the 2nd optical function face side at optical axis direction, be positioned at the 1st optical function face side and be called low.That is preferred non-flange part shape as shown in figure 12.The shape that the so-called extended line separately of this instructions intersects not only is confined to above-mentionedly, is also included near the intersection point of extended line separately, by the shape that is connected with fillet (R) that separately extended line joins.
Relevant flange surface, as other index, formula preferably meets the following conditions.
0.4＜L
f1/L
fA＜1.0
L
F1The face 1f of described the 2nd optical function face side of expression flange part
0, 1f
1In, in abutting connection with the face 1f of described the 2nd optical function face
0At the length (mm) of optical axis vertical direction, L
FAWhole 1f (the 1f of expression flange part
0, 1f
1Lump together) in the length (mm) of optical axis vertical direction.That is, also we can say L
F1Be the length of A among Figure 15 (b), L
FABe the length of A+B among Figure 15 (b).
Preferably make L
F1/ L
FAValue less than the higher limit of above-mentioned conditional, can on the face of described the 2nd optical function face side of flange part, establish 1 step at least like this.But, from the mould 12 with face 1f
0The processing viewpoint of counterpart is set out, preferred L
F1/ L
FAValue be little, but guarantee simultaneously the flatness of datum clamp face preferably to make L for the inclination that alleviates the relative datum clamp face of optical function face
F1/ L
FAValue greater than the lower limit of above-mentioned conditional.
Formula more preferably meets the following conditions.
0.6＜L
f1/L
fA＜1.0
Formula further preferably meets the following conditions.
0.6＜L
f1/L
fA＜0.9
Face by the 2nd optical function face side of integrally formed the 2nd optical function face and flange part in the mould 12 of central module, like this, be the face of the 2nd optical function face side of the flange part of object lens datum clamp face and the leeway that the relation of the position between the 2nd optical function face (optical function face 1a) produces skew, the correct position that forms the 2nd optical function face (optical function face 1a) of datum clamp face can access the objective lens for optical pickup device with roadholding relatively.
And, can finely tune the position of mould 12 at the relative mould 14 of object lens thickness direction, after carrying out the thickness direction fine position, fix.
The position that spue line PL is set is the dark position of the degree of depth at the flange part of the depth ratio mould 14 of the flange part 1f of mould 11.1g is a cast gate, is used for the injecting molten resin material.
Fig. 8 (a), 8 (b) are die for molding resin die opening state shown in Figure 7 and ejection part working state schematic representation.Fig. 8 (a) represents die opening state, the duty of Fig. 8 (b) expression ejection part.
Below, with reference to Fig. 7 and Fig. 8 (a), 8 (b), the manufacturing process of object lens 1 is described.
Under state shown in Figure 7, the resin material of molten condition flows into from cast gate 1g.At this moment, flow out in the gap that forms from ejection part 13 and mold 11 of the gas of mould inside.The exhaust of relevant this mould inside is preferably adopted following method: establish the mould inside sealing mechanism of air-breathing apparatuses such as adopting vacuum pump and O ring etc., attracted, do prior exhaust before molten resin material flows into mould; When molten resin material flows in the mould, attract, exhaust; Before molten resin material flows into mould, begin to attract, also attract in the inflow, exhaust; Or the like, by above-mentioned way, further improve the transfer printing of mold shape to object lens 1, can form more high-precision optical function face 1a, 1b.
Subsequent, shown in Fig. 8 (a), mould 11 moves, and sows discord from mould 12 and mould 14.At this moment, be the state that object lens 1 are stayed mould 11 sides.
Afterwards, shown in Fig. 8 (b), be configured in be equivalent to the locational ejection part 13 of flange part 1f from mould 11 to the diagram direction of arrow eject, make object lens 1 demoulding, so obtain having the object lens 1 of cast gate 1g state.This ejection part 13 is arranged on many places, the action of each ejection part 13 simultaneously, even or the different opportunity difference of ejecting also in 0.5 second, finish all ejecting, this is preferred concerning preventing object lens 1 distortion.Mould 11 is equivalent to the 1st mold, and mould 12 and mould 14 are equivalent to the 2nd mold.
Fig. 9 (a), 9 (b) are object lens 1 synoptic diagram that has cast gate 1g state with die for molding resin manufacturing shown in Figure 7.Fig. 9 (a) is object lens 1 planimetric map of seeing from the ejection part side, and Fig. 9 (b) is an outboard profile.
Fig. 9 (a) expression ejection part is spaced apart slightly, and 90 degree are configured in the situation that flange part 1f goes up 4 places shown in the 13n.The ejection part vestige that this ejection part stays after when being assembled into bare headed portion, become the sign of differentiating optical function face 1a, 1b, have the effect of ease of assembly.
The ejection part vestige that preferred this ejection part stays is a recess, but also can be protuberance, is that flange part has a plurality of protuberances at this moment.In addition, preferred recess or protuberance are the circles shown in Fig. 9 (a), 9 (b).And, from keeping the viewpoint of the good mouldability ground demoulding, preferred ejection part vestige, be that the number of recess or protuberance is about 2～4.
Shown in Fig. 9 (b), the 1f of preferred flange portion goes up the face that ejection part is run into, compare with the position on the optical axis of optical function face 1b, in the scope that does not exceed flange part 1f thickness, only d=0.005mm～0.5mm is positioned at optical function face 1a side, and more preferably only d=0.02mm～0.12mm is positioned at optical function face 1a side.By forming such shape, the surfaceness Ry with at least a portion of the face on the flange part 1f is formed on below the 0.1 μ m easily, can be the following part of 0.1 μ m with this surfaceness Ry, when these object lens 1 are installed to optical take-up apparatus, is used for adjusting.And even the chimeric gap owing to ejection part 13 among Fig. 7 and mould 11 produces burr on the ejection part vestige, because the step of above-mentioned d is arranged, when object lens installed to optical take-up apparatus, operating distance can not shorten yet.
And it is D that the face that preferred ejection part is run into is located at effective diameter
1, D
22 optical function faces in, D that effective diameter is little
1The optical function face side of side is promptly on the flange part of optical function face 1b (the 1st optical function face) side.Like this, can keep the less object lens profile ground that comprises flange part 1f to form bigger ejection part.
Remove cast gate 1g from the object lens 1 that have cast gate 1g state shown in Fig. 9 (a), 9 (b), object lens 1 are just finished.
Figure 10 is a mould shown in Figure 7, when its spue line PL is located between flange part 1f thickness, and the mold shape cross section enlarged diagram of flange part 1f periphery.
As shown in figure 10, be the boundary with the spue line, when the degree of depth with mould 11 sides of ejection part 13 place sides is t
1, be t with the degree of depth of opposite side mould 14 and mould 12 sides
2The time, preferably make t
1＞t
2And, when the angle of taper of extracting with mould 11 sides of ejection part 13 place sides is α, with opposite side mould 12 and mould 14 sides extract angle of taper when being β, preferably make α≤β.The preferred 0 °≤α of the scope of α≤3 ° in addition.By forming such mold 11,12,14, object lens can not taken away by mould 12,14 during die sinking, can stay mould 11 sides that have ejection part definitely.
In addition, preferably on the face of the 1st optical function face side of flange part 1f, form the planar portions vertical with optical axis.Routine as shown in figure 14, especially preferably in the face of the 1st optical function face side of flange part 1f on the part near the optical axis part, form the planar portions 1k vertical with optical axis, especially preferably the 1st optical function face terminal immediately the outside, form the planar portions 1k vertical with optical axis.And preferably the surfaceness Ry of this planar portions 1k is below 0.1 μ m.The width W (with the optical axis vertical direction) of preferred this planar portions 1k is more than the 0.1mm, below the 0.5mm.More preferably more than the 0.2mm, below the 0.4mm.Can be to this planar portions 1k irradiation directional light, the inclination when object lens 1 being installed to picture frame etc. with its reflected light detection.And by making t
1＞t
2, the power that object lens 1 are taken away by mold 12 during die sinking reduces like this, so the on-deformable effect of this planar portions is arranged again.
Also can be as shown in figure 14, the mould of the 1st optical function face 1b side is divided into: the central module 15 that forms the 1st optical function face 1b and above-mentioned planar portions 1k; Form its peripheral circumferential component.Help reducing the Mould Machining difficulty like this.
In addition, preferably make the border of mould 12 and mould 14 parallel, like this, can make mould 12 and mould 14 chimeric, can suppress the generation of burr with very little gap (space) with optical axis.
Subsequent, second example of the objective lens for optical pickup device that present embodiment is related to explains.This example represents, even because of the gap of 14 on mould 12 and mould produces burr, also not run-off the straight when lens are installed can improve installation accuracy.
Fig. 1 is the objective lens for optical pickup device of the optical element that relates to of present embodiment, the side schematic view of its second example.
Objective lens for optical pickup device 1 shown in Figure 1 (the following object lens that claim again) has optical function face 1a, the optical function face 1b for optical function portion, and the flange part 1f that is formed on this optical function face periphery.Below to having describing of circular optical function face and round flange portion, but also can form the flange part 1f that part and profile are rectangle.Can also on the one side at least of optical function face, form diffraction surfaces aplanatism difference and pay structure with ring-band shape step.
Preferred disposition object lens 1 shown in Figure 1 are that optical function face 1b faces toward CD in optical take-up apparatus, and optical function face 1a is facing to light source.Optical function face 1b facing to CD in the present embodiment is equivalent to the 1st optical function face, and the optical function face 1a that faces toward light source is equivalent to the 2nd optical function face.
As shown in Figure 1, preferred the 2nd optical function face (optical function face 1a) specific surface is big to the 1st optical function face (the optical function face 1b) curvature of CD, and effective diameter is that the 2nd optical function face (optical function face 1a) is greater than the 1st optical function face (optical function face 1b).In addition, the effective diameter of preferred the 2nd optical function face is more than the 0.3mm, below the 7mm, more preferably more than the 0.5mm, below the 4mm.
As shown in the figure, flange part 1f has formed flange surface 1f
0With the 1st step 1f
1And the 2nd step 1f
2, wherein, flange surface 1f
0Be the 2nd optical function face (optical function face 1a) side perpendicular to the face of optical axis O, the 1st step 1f
1At flange surface 1f
0Outside and have step in the CD side.Preferably above-mentioned the 1st step and the 2nd step being set as when optical axis direction is seen object lens is to be the concentric circles at center with the optical axis.
Figure 11 (a), 11 (b) are object lens 1 shown in Figure 1 model utility sectional views when being installed into the picture frame of pick device.Figure 11 (a) represents whole, and Figure 11 (b) is a flange part 1f periphery enlarged diagram.
Shown in Figure 11 (a), make the flange surface 1f of flange part 1f
0Run into fixedly object lens 1 of picture frame 31.That is, by being the flange surface 1f that the mould 12 of central module forms in the die for molding resin sectional view shown in Figure 2
0, be the reference field when installing to picture frame.In addition, the 1st step 1f
1Do not run into picture frame 31, between gapped.
In addition, be the flange surface 1f of datum clamp face shown in Figure 11 (b)
0The preferred 0.10～0.80mm of radial width A about, more preferably about 0.20～0.50mm.The 1st step 1f
1The preferred 0.01～0.25mm of radial width B ' about, more preferably about 0.08～0.15mm.The 2nd step 1f
2The preferred 0.01～0.20m of radial width C about, more preferably about 0.05～0.15mm.And, with flange surface 1f
0The 1st step 1f for benchmark
1At the step amount D of optical axis direction and with the 1st step 1f
1The 2nd step 1f for benchmark
2Step amount E at optical axis direction is being no more than flange surface 1f
0In the scope of the thickness of optical axis direction, preferably about 0.005～0.20mm, more preferably about 0.02～0.06mm.Flange surface 1f
0About the preferred 0.20～1.50mm of the thickness of optical axis direction, more preferably about 0.20～1.00mm.In addition, preferred flange face 1f
0With the 1st step 1f
1Joint face be formed in sectional view and see it is 1 ° of taper, preferred the 1st step 1f to 60 ° of scopes
1With the 2nd step 1f
2Joint face be formed parallel with optical axis.
In addition, preferred flange face 1f
0At least near on the part of optical axis side, have the part of surfaceness Ry below 0.3 μ m.Flange surface 1f
1Can be surfaceness Ry below 0.3 μ m, can not be yet.More preferably have the part of surfaceness Ry below 0.1 μ m.Surfaceness Ry is meant, the height from pushing up to the top at the bottom of the lowest trough in affiliated face small concavo-convex.In addition, the 2nd step 1f
2Also can be that surfaceness Ry is more than 0.3 μ m.Also can be that surfaceness Ry is more than 0.3 μ m with equidirectional of optical axis or taper surface between the step.
Fig. 2 is the schematic configuration schematic cross-section that is used for making the die for molding resin of object lens 1 shown in Figure 1.
For fear of repeat specification, describe in figure below the congenerous parts are paid with symbol.
Die for molding resin shown in Fig. 2 is the boundary with spue line PL, and the 1st mold is made of mould 11, and the 2nd mold is made of mould 12 and mould 14.In addition, be that the mould 11 of the 1st mold is equivalent to movable side mold, be the mould 12 and the mould 14 of the 2nd mold is equivalent to fixed side mold.
Mould 14 moulds 12 constitute inserts portion relatively.Mould 12 forms shape 12a and flange surface 1f
0And the 1st step 1f
1, wherein, shape 12a is used for forming optical function face 1a (the 2nd optical function face), and it is a big optical function face of effective diameter in the optical function face of object lens 1, flange surface 1f
0It is the datum clamp face in the face of flange part 1f the 2nd optical function face side.In addition, mould 14 forms the 2nd step 1f
2That is to say that mould 12 is the 1st step 1f with the border of mould 14
1With the 2nd step 1f
2The boundary line.In addition, optical function face 1a (the 2nd optical function face) be the flange surface 1f of datum clamp face
0The face of the 2nd optical function face side between do not form recess, form the shape that extended line separately intersects.In other words, the face 1f of 1f of preferred flange portion and the 2nd optical function face 1a adjacency
0, being formed is flange part 1f (1f in the 2nd optical function face side
0, 1f
1, 1f
2) in highly the highest face.That is preferred non-flange part shape as shown in figure 12.The what is called " 1f here
0The height height ", be to call height being positioned at the 2nd optical function face side at optical axis direction, be positioned at the 1st optical function face side and be called low.The shape that the so-called extended line separately of this instructions intersects is not confined to above-mentionedly, is also included near the intersection point of extended line separately, by the shape that is connected with fillet (R) that separately extended line joins.
Relevant flange surface, as other index, formula preferably meets the following conditions.
0.4＜L
f1/L
fA＜1.0
L
F1The face 1 of described the 2nd optical function face side of expression flange part
F0, 1
F1, 1
F2In, in abutting connection with the face 1 of described the 2nd optical function face
F0At the length (mm) of optical axis vertical direction, L
FAThe whole 1f (1 of expression flange part
F0, 1
F1, 1
F2Lump together) in the length (mm) of optical axis vertical direction.That is, also we can say L
F1Be the length of A among Figure 11 (b), L
FABe the length of A+B+C among Figure 11 (b).
Preferably make L
F1/ L
FAValue less than the higher limit of above-mentioned conditional, can on the face of described the 2nd optical function face side of flange part, establish 2 steps at least like this.But, from the mould 12 with face 1f
0The processing viewpoint of counterpart is set out, preferred L
F1/ L
FAValue be little, but guarantee simultaneously the flatness of datum clamp face preferably to make L for the inclination that alleviates the relative datum clamp face of optical function face
F1/ L
FAValue greater than the lower limit of above-mentioned conditional.
Formula more preferably meets the following conditions.
0.6＜L
f1/L
fA＜1.0
Formula further preferably meets the following conditions.
0.6＜L
f1/L
fA＜0.9
Face by the 2nd optical function face side of integrally formed the 2nd optical function face and flange part in the mould 12 of central module, like this, be the face of the 2nd optical function face side of the flange part of object lens datum clamp face and the leeway that the relation of the position between the 2nd optical function face (optical function face 1a) produces skew, the correct position that forms the 2nd optical function face (optical function face 1a) of datum clamp face can access the objective lens for optical pickup device with roadholding relatively.
And, can finely tune the position of mould 12 at the relative mould 14 of object lens thickness direction, fix after the thickness direction fine position carrying out.
The position that spue line PL is set is the degree of depth at the flange part 1f of mould 11, than the dark position of the degree of depth of the flange part of mould 14.1g is a cast gate, is used for the injecting molten resin material.
Fig. 3 (a), 3 (b) are die for molding resin die opening state shown in Figure 2 and ejection part working state schematic representation.Fig. 3 (a) represents die opening state, the duty of Fig. 3 (b) expression ejection part.
Below, with reference to Fig. 2 and Fig. 3 (a), 3 (b), the manufacturing process of object lens 1 is described.
Under state shown in Figure 2, the resin material of molten condition flows into from cast gate 1g.At this moment, flow out in the gap that forms from ejection part 13 and mold 11 of the gas of mould inside.The exhaust of relevant this mould inside is preferably adopted following method: establish the mould inside sealing mechanism of air-breathing apparatuses such as adopting vacuum pump and O ring etc., attracted, do prior exhaust before molten resin material flows into mould; When molten resin material flows in the mould, attract, exhaust; Before molten resin material flows into mould, begin to attract, also attract in the inflow, exhaust; Or the like, by above-mentioned way, further improve the transfer printing of mold shape to object lens 1, can form more high-precision optical function face 1a, 1b.
Subsequent, shown in Fig. 3 (a), mould 11 moves, and sows discord from mould 12 and mould 14.At this moment, object lens 1 are stayed the state of mould 11 sides.
Afterwards, shown in Fig. 3 (b), be configured in be equivalent to the locational ejection part 13 of flange part 1f from mould 11 to the diagram direction of arrow eject, make object lens 1 demoulding, so obtain having the object lens 1 of cast gate 1g state.This ejection part 13 is arranged on many places, the action of each ejection part 13 simultaneously, even or the different opportunity difference of ejecting also in 0.5 second, finish all ejecting, this is preferred concerning preventing object lens 1 distortion.Mould 11 is equivalent to the 1st mold, and mould 12 and mould 14 are equivalent to the 2nd mold.
Fig. 4 (a), 4 (b) are object lens 1 synoptic diagram that has cast gate 1g state with die for molding resin manufacturing shown in Figure 2.Fig. 4 (a) is object lens 1 planimetric map of seeing from the ejection part side, and Fig. 4 (b) is an outboard profile.
Fig. 4 (a) expression ejection part is spaced apart slightly, and 90 degree are configured in the situation that flange part 1f goes up 4 places shown in the 13n.The ejection part vestige that this ejection part stays after when being assembled into bare headed portion, become the sign of differentiating optical function face 1a, 1b, have the effect of ease of assembly.
The ejection part vestige that preferred this ejection part stays is a recess, but also can be protuberance, is that flange part has a plurality of protuberances at this moment.In addition, preferred recess or protuberance are the circles shown in Fig. 4 (a), 4 (b).And, from keeping the viewpoint of the good mouldability ground demoulding, preferred ejection part vestige, be that the number of recess or protuberance is about 2～4.
Shown in Fig. 4 (b), the 1f of preferred flange portion goes up the face that ejection part is run into, compare with the position on the optical axis of optical function face 1b, in the scope that does not exceed flange part 1f thickness, only d=0.005mm～0.5mm is positioned at optical function face 1a side, and more preferably only d=0.02mm～0.12mm is positioned at optical function face 1a side.By forming such shape, the surfaceness Ry with at least a portion of the face on the flange part 1f is formed on below the 0.1 μ m easily, can be the following part of 0.1 μ m with this surfaceness Ry, the adjustment when being used for that these object lens 1 are installed to optical take-up apparatus.And even because of the chimeric gap of ejection part among Fig. 7 13 and mould 11 produces burr on the ejection part vestige, because the step of above-mentioned d is arranged, when object lens installed to optical take-up apparatus, operating distance can not shorten yet.
And it is D that the face that preferred ejection part is run into is located at effective diameter
1, D
22 optical function faces in, D that effective diameter is little
1The optical function face side of side is promptly on the flange part of optical function face 1b (the 1st optical function face) side.Like this, can keep the less object lens profile ground that comprises flange part 1f to form bigger ejection part.
Remove cast gate 1g from the object lens 1 that have cast gate 1g state shown in Fig. 4 (a), 4 (b), object lens 1 are just finished.
Fig. 5 is a mould shown in Figure 2, when its spue line PL is located between flange part 1f thickness, and the mold shape cross section enlarged diagram of flange part 1f periphery.
As shown in Figure 5, be the boundary with the spue line, when the degree of depth with mould 11 sides of ejection part 13 place sides is t
1, be t with the degree of depth of opposite side mould 14 and mould 12 sides
2The time, preferably make t
1＞t
2And, when the angle of taper of extracting with mould 11 sides of ejection part 13 place sides is α, with opposite side mould 14 sides extract angle of taper when being β, preferably make α≤β.In addition, when with mould 12 extract angle of taper when being γ, preferably make α≤γ.The preferred 0 °≤α of the scope of α≤3 ° in addition.Example also can be located at spue line on the position of the 2nd step as shown in figure 13, with α=0 °.By forming such mold 11,12,14, object lens can not taken away by mould 12,14 during die sinking, can stay mould 11 sides that have ejection part definitely.
In addition, preferably on the face of the 1st optical function face side of flange part 1f, form the planar portions vertical with optical axis.Routine as shown in figure 13, especially preferably in the face of the 1st optical function face side of flange part 1f on the part near the optical axis part, form the planar portions 1k vertical with optical axis, especially preferably the 1st optical function face terminal immediately the outside, form the planar portions 1k vertical with optical axis.And preferably the surfaceness Ry of this planar portions 1k is below 0.1 μ m.The width W (with the optical axis vertical direction) of preferred this planar portions 1k is more than the 0.1mm, below the 0.5mm.More preferably more than the 0.2mm, below the 0.4mm.Can be to this planar portions 1k irradiation directional light, the inclination when object lens 1 being installed to picture frame etc. with its reflected light detection.And by making t
1＞t
2, the power that object lens 1 are taken away by mold 12 during die sinking reduces thus, so the on-deformable effect of this planar portions is arranged again.
And, as shown in figure 13, also the mould of the 1st optical function face side can be divided into: the central module 15 that forms the 1st optical function face 1b and above-mentioned planar portions 1k; Form its peripheral circumferential component.
In addition, preferably make the border of mould 12 and mould 14 parallel, like this, can make mould 12 and mould 14 chimeric, can suppress the generation of burr with very little gap (space) with optical axis.Even the generation burr are also because there is high bottom surface, so also do not influence datum clamp face when installing to picture frame.
As above illustration, object lens are during from the 1st mold demoulding of movable side, by ejecting the part of the flange part that is formed on optical function face periphery, there is no need the 1st mold 11 side molds that form the 1st optical function face to be moved for the demoulding, like this, it is different with displacement to have avoided forming the tilt quantity of mould when per injection of the 1st optical function face.Here said displacement is the displacement of mould in desirable optical axis O vertical direction.The mould 12 of relevant the 2nd mold and mould 14, though 2 moulds separately, but because datum clamp face and optical function face are integrally formed by same mould 12, so, when having avoided the 2nd optical function face (optical function face 1a) object lens 1 having installed to picture frame relatively as the face of the 2nd optical function face side datum clamp face, flange part, tilt quantity is different at every turn.Therefore, a kind of die for molding resin can be accessed, wherein objective lens for optical pickup device can be accessed with roadholding.
In addition, utilize the gap of ejection part to carry out exhaust, there is no need to form separately exhaust portion like this, can form good optical function face.And the precision of ejection part can be not really strict, do not influence the formation of optical function face.
And as described in the 2nd embodiment, hold the situation of the flange part mode of 2 step surfaces,, can improve installation accuracy even, also can not tilt when lens are installed owing to the gap of 14 on mould 12 and mould produces burr.Therefore, compare with the 1st embodiment, the gap that its mould 11 of the mould of the 2nd embodiment and mould are 14 big a little a bit can, so more be effective in and be convenient to Mould Machining.
Object lens shown in the present embodiment, because 2 optical function faces do not have off-centre, and the optical function face is stable to the position of datum clamp face, so, be applied to adopting the NA value is about 0.7～0.9, wavelength is the high memory capacity of the bluish violet color laser about 400～450nm CD to write down or when regenerating during employed object lens, having bigger effect.
Object lens shown in the present embodiment are being used as when a plurality of CDs are carried out the exchange lens of recording/reproducing, described NA value be the NA value NA value of high CD in the CD of noting down/regenerating.For example, when the optical element that the present invention relates to was used as the exchange lens of BD, HD DVD, the NA value that described NA value is BD was about 0.85, and when being used as the exchange lens of BD, DVD, CD, the NA value that described NA value is BD is about 0.85.
Claims (7)
1. optical element, has optical function portion and at the flange part of this optical function portion periphery, the N A value of described optical function portion is more than 0.7, optical element is characterised in that, described optical function portion has the 1st optical function face and the 2nd optical function face that faces toward mutually, and described the 1st optical function face is littler than described the 2nd optical function curvature of face, on the face of described the 2nd optical function face side of described flange part, at least be provided with 2 steps that highly reduce with away from optical axis
The face of described the 2nd optical function face side of described the 2nd optical function face and described flange part is formed by the mold that central module and circumferential component constitute,
The border of described central module and described circumferential component is positioned on the boundary line of described 2 steps.
2. optical element as claimed in claim 1 is characterized in that, the face of described the 2nd optical function face side of described flange part is reference field when installing to picture frame.
3. optical element as claimed in claim 1 or 2 is characterized in that, formula meets the following conditions:
0.4＜L
f1/L
fA＜1.0
Wherein, L
F1Represent in the face of described the 2nd optical function face side of described flange part, in abutting connection with the face of described the 2nd optical function face length (m m), L in the optical axis vertical direction
FAExpression flange part integral body is in the length (mm) of optical axis vertical direction.
4. optical element as claimed in claim 1 is characterized in that, the face of described flange part and described the 2nd optical function face adjacency is highly the highest face in the described flange part of described the 2nd optical function face side.
5. optical element as claimed in claim 1 is characterized in that, on the face of described the 1st optical function face side of described flange part, is provided with a plurality of recesses or protuberance.
6. optical element as claimed in claim 1 is characterized in that, the height of described the 1st optical function face on optical axis is more outstanding than the face of described the 1st optical function face side of described flange part.
7. optical element as claimed in claim 1 is characterized in that, on the face perpendicular to described optical axis that forms on the described flange part of described the 2nd optical function face side, having surfaceness Ry is the following part of 0.3 μ m.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP297504/2006 | 2006-11-01 | ||
| JP2006297504 | 2006-11-01 | ||
| PCT/JP2007/070066 WO2008053692A1 (en) | 2006-11-01 | 2007-10-15 | Optical element, resin molding metal die and optical element manufacturing method |
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| CN 201010550010 Division CN102081211B (en) | 2006-11-01 | 2007-10-15 | Optical element, resin molding metal die and optical element manufacturing method |
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| CN101529300A CN101529300A (en) | 2009-09-09 |
| CN101529300B true CN101529300B (en) | 2011-01-19 |
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| CN2007800400572A Expired - Fee Related CN101529300B (en) | 2006-11-01 | 2007-10-15 | Optical element, resin molding metal die and optical element manufacturing method |
| CN 201010550010 Expired - Fee Related CN102081211B (en) | 2006-11-01 | 2007-10-15 | Optical element, resin molding metal die and optical element manufacturing method |
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| CN 201010550010 Expired - Fee Related CN102081211B (en) | 2006-11-01 | 2007-10-15 | Optical element, resin molding metal die and optical element manufacturing method |
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| Country | Link |
|---|---|
| JP (2) | JP4737293B2 (en) |
| CN (2) | CN101529300B (en) |
| WO (1) | WO2008053692A1 (en) |
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2007
- 2007-10-15 CN CN2007800400572A patent/CN101529300B/en not_active Expired - Fee Related
- 2007-10-15 JP JP2008542031A patent/JP4737293B2/en not_active Expired - Fee Related
- 2007-10-15 CN CN 201010550010 patent/CN102081211B/en not_active Expired - Fee Related
- 2007-10-15 WO PCT/JP2007/070066 patent/WO2008053692A1/en active Application Filing
-
2011
- 2011-02-16 JP JP2011030630A patent/JP5382026B2/en not_active Expired - Fee Related
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| JP昭61-261015A 1986.11.19 |
| JP特开2002-200638A 2002.07.16 |
| JP特开2004-130703A 2004.04.30 |
| JP特开2004-205821A 2004.07.22 |
| JP特开2004-314545A 2004.11.11 |
| JP特开平9-131802A 1997.05.20 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101529300A (en) | 2009-09-09 |
| WO2008053692A1 (en) | 2008-05-08 |
| JP5382026B2 (en) | 2014-01-08 |
| JP4737293B2 (en) | 2011-07-27 |
| CN102081211A (en) | 2011-06-01 |
| CN102081211B (en) | 2013-07-10 |
| JP2011156870A (en) | 2011-08-18 |
| JPWO2008053692A1 (en) | 2010-02-25 |
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