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WO2010116829A1 - Élément optique et procédé de fabrication d'élément optique - Google Patents

Élément optique et procédé de fabrication d'élément optique Download PDF

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Publication number
WO2010116829A1
WO2010116829A1 PCT/JP2010/053640 JP2010053640W WO2010116829A1 WO 2010116829 A1 WO2010116829 A1 WO 2010116829A1 JP 2010053640 W JP2010053640 W JP 2010053640W WO 2010116829 A1 WO2010116829 A1 WO 2010116829A1
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WIPO (PCT)
Prior art keywords
antioxidant
film
optical element
mass
organic film
Prior art date
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Ceased
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PCT/JP2010/053640
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English (en)
Japanese (ja)
Inventor
誠 望月
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Opto Inc
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Konica Minolta Opto Inc
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Filing date
Publication date
Application filed by Konica Minolta Opto Inc filed Critical Konica Minolta Opto Inc
Publication of WO2010116829A1 publication Critical patent/WO2010116829A1/fr
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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
    • B29D11/00865—Applying coatings; tinting; colouring
    • 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

Definitions

  • the present invention relates to an optical element and a method for manufacturing the optical element.
  • the wavelength of a laser light source used as a light source for reproducing information recorded on an optical disk and recording information on the optical disk has been reduced.
  • a blue-violet semiconductor laser or a second harmonic wave is used.
  • a laser light source having a wavelength of 390 to 420 nm such as a blue-violet SHG laser that performs wavelength conversion of an infrared semiconductor laser using generation is being put into practical use.
  • a plastic optical element for example, an objective lens
  • a copolymer of a cyclic olefin and an ⁇ -olefin is known.
  • Patent Document 1 In order to prevent the oxidative cleavage of the resin molecular chain that proceeds from the resin surface from proceeding and to improve the light resistance, an attempt to form an antioxidant on the surface of the resin lens using a cyclic olefin polymer is made.
  • Patent Document 2 In addition, attempts have been made to improve light resistance by dispersing an antioxidant in a cyclic olefin resin (for example, Patent Document 2).
  • a method for improving the light resistance of a resin lens using a cyclic olefin polymer a method of dispersing an antioxidant in a lens resin or a film composed only of an antioxidant is used. There is a method of directly forming on the surface of the resin lens by a method such as vapor deposition or solvent coating.
  • the light resistance of the optical element produced by the method according to the prior art is not sufficient and has the following problems.
  • the method of dispersing an antioxidant in a resin lens if a sufficient amount of an antioxidant is added to the resin to obtain the required light resistance, bleeding out occurs during molding of the resin lens, and the appearance and There is a risk of deteriorating optical properties.
  • the adhesion of the film composed only of the antioxidant is poor. Thus, there is a problem that the light resistance is lowered.
  • the present invention solves the above problems, an optical element in which a film containing an antioxidant is formed on the surface, and the adhesion and light resistance of the film are improved, and a method for manufacturing the optical element The purpose is to provide.
  • One aspect of the present invention includes a molded part molded from a resin material having an alicyclic hydrocarbon structure, and an organic film formed on an optical surface on the molded part.
  • the optical element is characterized by containing 5% by mass or more and 90% by mass or less of an antioxidant with respect to the total mass of the organic film.
  • Another aspect of the present invention includes a step of forming a molded part by molding a resin material having an alicyclic hydrocarbon structure, a step of forming an organic film containing an antioxidant on the molded part, In the step of forming the organic film, the organic film is formed by applying a solvent containing the antioxidant and the resin material on the optical surface of the molded part. And forming the organic film containing an antioxidant in an amount of 5% by mass to 90% by mass with respect to the total mass of the optical element.
  • the organic film is preferably made of an organic polymer material having a molecular weight of 10,000 or more.
  • the molecular weight of the antioxidant is preferably 400 to 4000.
  • the organic film is preferably formed by applying a solvent containing the antioxidant and the resin material on the optical surface.
  • the thickness of the organic film is preferably 5 nm or more and 100 nm or less.
  • an antireflection film composed of an inorganic compound is formed on the organic film.
  • the organic film containing 5% by mass or more and 90% by mass or less of the antioxidant is formed on the surface of the resin molded part having an alicyclic hydrocarbon structure, thereby proceeding from the surface of the molded part. It is possible to suppress the progress of oxidative cleavage of the resin molecular chain.
  • the organic film is formed on the surface of the molded part by adding the antioxidant to the organic film. High adhesion of the film can be obtained.
  • an organic film containing an antioxidant is formed on the surface of the molded part without dispersing a high concentration of antioxidant of 5% by mass or more and 90% by mass or less in the molded part. Can be suppressed.
  • FIG. 1 is a partially enlarged view of an optical element according to an embodiment of the present invention.
  • the optical pickup device 30 includes a semiconductor laser oscillator 32.
  • the semiconductor laser oscillator 32 is an example of a light source, and emits blue laser light (blue-violet laser) having a specific wavelength (eg, 405 nm) of 350 to 450 nm for BD (Blu-ray Disc: registered trademark). ing.
  • a collimator 33, a beam splitter 34, a quarter wavelength plate 35, a diaphragm 36, and an objective lens 37 are arranged in a direction away from the semiconductor laser oscillator 32. Are sequentially arranged.
  • a sensor lens group 38 and a sensor 39 including two sets of lenses are sequentially arranged in a position close to the beam splitter 34 and in a direction orthogonal to the optical axis of the blue-violet light described above.
  • the objective lens 37 is disposed at a position facing the high-density optical disc D (BD optical disc), and condenses the blue laser light emitted from the semiconductor laser oscillator 32 on one surface of the optical disc D. Yes.
  • the objective lens 37 is an example of an optical element, and the image-side numerical aperture NA is 0.7 or more.
  • a flange portion is formed on the periphery of the objective lens 37, and a two-dimensional actuator 40 is mounted on the flange portion. By the operation of the two-dimensional actuator 40, the objective lens 37 is movable on the optical axis.
  • FIG. 2 shows an enlarged part of the objective lens 37.
  • the objective lens 37 is mainly composed of a molding unit 50, and an anti-oxidation film 51 is formed on each of the front surface 37 a and the back surface 37 b, and the anti-reflection film 52 is formed on the anti-oxidation film 51.
  • An antioxidant film 51 and an antireflection film 52 are depicted only on the surface 37a in FIG. 2).
  • the molded part 50 is molded into a lens shape, and the front surface 37a and the back surface 37b are optical surfaces so as to exhibit essential optical functions such as a light collecting function.
  • the molding part 50 is made of a resin material having an alicyclic hydrocarbon structure.
  • alicyclic hydrocarbon resins examples include norbornene resins, monocyclic cyclo (cyclic) olefin resins, cyclo (cyclic) conjugated diene resins, vinyl alicyclic hydrocarbon resins, and hydrides thereof. Can be mentioned. Among these, norbornene-based resins can be suitably used because of their good transparency and moldability.
  • Examples of the norbornene-based resin include a ring-opening polymer of a monomer having a norbornene structure, a ring-opening copolymer of a monomer having a norbornene structure and another monomer, a hydride thereof, and a norbornene structure.
  • a ring-opening (co) polymer hydride of a monomer having a norbornene structure is particularly suitable from the viewpoints of transparency, moldability, heat resistance, low hygroscopicity, dimensional stability, lightness, and the like. Can be used.
  • Examples of the monomer having a norbornene structure include bicyclo [2.2.1] hept-2-ene (common name: norbornene), tricyclo [4.3.0.1 2,5 ] deca-3,7-diene. (Common name: dicyclopentadiene), 7,8-benzotricyclo [4.3.0.1 2,5 ] dec-3-ene (common name: methanotetrahydrofluorene), tetracyclo [4.4.0. 1 2,5 . 1 7,10 ] dodec-3-ene (common name: tetracyclododecene) and derivatives of these compounds (for example, those having a substituent in the ring).
  • examples of the substituent include an alkyl group, an alkylene group, and a polar group.
  • these substituents may be the same or different and a plurality may be bonded to the ring.
  • Monomers having a norbornene structure can be used singly or in combination of two or more.
  • Examples of the polar group include heteroatoms or atomic groups having heteroatoms.
  • Examples of the hetero atom include an oxygen atom, a nitrogen atom, a sulfur atom, a silicon atom, and a halogen atom.
  • Specific examples of the polar group include a carboxyl group, a carbonyloxycarbonyl group, an epoxy group, a hydroxyl group, an oxy group, an ester group, a silanol group, a silyl group, an amino group, a nitrile group, and a sulfone group.
  • monomers capable of ring-opening copolymerization with monomers having a norbornene structure include monocyclo (cyclic) olefins such as cyclohexene, cycloheptene, and cyclooctene and derivatives thereof, and cyclo ( Cyclic) conjugated dienes and derivatives thereof.
  • a ring-opening polymer of a monomer having a norbornene structure and a ring-opening copolymer of a monomer having a norbornene structure and another monomer copolymerizable with the monomer have a known ring-opening polymerization catalyst. It can be obtained by (co) polymerization in the presence.
  • Examples of other monomers that can be addition-copolymerized with a monomer having a norbornene structure include, for example, ⁇ -olefins having 2 to 20 carbon atoms such as ethylene, propylene, and 1-butene, and derivatives thereof; cyclobutene, cyclopentene, Examples thereof include cycloolefins such as cyclohexene and derivatives thereof; non-conjugated dienes such as 1,4-hexadiene, 4-methyl-1,4-hexadiene, and 5-methyl-1,4-hexadiene. These monomers can be used alone or in combination of two or more. Among these, ⁇ -olefin is preferable, and ethylene is more preferable.
  • An addition polymer of a monomer having a norbornene structure and an addition copolymer of another monomer copolymerizable with a monomer having a norbornene structure can be used in the presence of a known addition polymerization catalyst. It can be obtained by polymerization.
  • X bicyclo [3.3.0] octane-2,4-diyl-ethylene structure and Y: tricyclo [4.3.0.1 2,5 ] decane-7 are used as repeating units.
  • 9-diyl-ethylene structure the content of these repeating units is 90% by mass or more based on the entire repeating units of the norbornene resin, and the X content ratio and the Y content ratio are The ratio of X: Y is preferably 100: 0 to 40:60.
  • the molecular weight of the cyclo (cyclic) olefin resin used in this embodiment is appropriately selected according to the purpose of use.
  • Polyisoprene or polystyrene-equivalent weight average molecular weight (Mw) measured by gel permeation chromatography using cyclohexane (toluene if the polymer resin does not dissolve) as a solvent usually 20,000 to 150,000. . It is preferably 25,000 to 100,000, more preferably 30,000 to 80,000.
  • Mw weight average molecular weight
  • the glass transition temperature of the cyclo (cyclic) olefin resin may be appropriately selected according to the purpose of use.
  • the range is preferably from 130 to 160 ° C, more preferably from 135 to 150 ° C.
  • cycloolefin-based resin used in this embodiment include, for example, JSR Corporation trade name: ARTON, Nippon Zeon Corporation trade name: Zeonex, Mitsui Chemicals, Inc. trade name: Apel, Sekisui Chemical Kogyo Co., Ltd. trade name: Essina etc.
  • the optical element according to this embodiment includes a filler, an antioxidant, an ultraviolet absorber, a heat stabilizer, a lubricant, an antistatic agent, as necessary, for each layer, particularly for the substrate. Antibacterial agents, pigments and the like can be added.
  • the antioxidant film 51 is a film in which an antioxidant is contained in a resin material (binder). This antioxidant film 51 contains 5 mass% or more and 90 mass% or less of antioxidant with respect to the total mass of the antioxidant film 51.
  • the antioxidant film 51 corresponds to an example of the “organic film” of the present invention.
  • Resin material of the antioxidant film 51 As the resin material (binder) used for the antioxidant film 51, an organic polymer having high transparency is used.
  • an organic polymer having a molecular weight of 10,000 or more for the resin material (binder) used for the antioxidant film 51 is preferable to use.
  • the resin material (binder) used for the antioxidant film 51 for example, JSR Corporation product name: ARTON, Nippon Zeon Corporation product name: Zeonex, Mitsui Chemicals, Inc. product name: Apel, Sekisui Chemical Co., Ltd., product name: Essina, etc.
  • a resin having a hydrocarbon structure can be used.
  • a highly transparent resin such as polymethyl methacrylate, polydimethylsiloxane, polyethylene terephthalate, polycarbonate, or polyimide can be used.
  • the molecular weight of the organic polymer used for the resin material (binder) of the antioxidant film 51 is 10,000 or more.
  • a compound having a molecular weight of less than 10,000 has high crystallinity and easily forms a brittle film, which causes cracking.
  • a compound having a molecular weight of 10,000 or more is in an amorphous state with low crystallinity and generally becomes a film having high mechanical strength.
  • antioxidant film 51 when an organic polymer is used for the resin material (binder) of the antioxidant film 51, it is preferable to use a resin having the same alicyclic hydrocarbon structure as that of the molded part 50. Thereby, it becomes possible to further suppress the occurrence of white turbidity in the optical element.
  • antioxidant contained in the antioxidant film 51 include a benzophenone-based light-resistant stabilizer, a benzotriazole-based light-resistant stabilizer, and a hindered amine-based light-resistant stabilizer. From the viewpoint of properties and the like, it is preferable to use a hindered amine light-resistant stabilizer.
  • HALS hindered amine light stabilizers
  • those having a polystyrene-equivalent Mn of 400 to 4000 as measured by GPC using THF as a solvent are preferred. If Mn is too small, a volatile component is generated as a gas from the lens when the lens is used for a long time with the lamp turned on. Conversely, if Mn is too large, the dispersibility in the block copolymer is lowered, the transparency of the lens is lowered, and the effect of improving light resistance is reduced. Therefore, in the present invention, a lens excellent in processing stability, low gas generation and transparency can be obtained by setting the HALS Mn in the above range.
  • HALS include N, N ′, N ′′, N ′′ ′-tetrakis- [4,6-bis- ⁇ butyl- (N-methyl-2,2,6,6-tetramethylpiperidine].
  • -4-yl) amino ⁇ -triazin-2-yl] -4,7-diazadecane-1,10-diamine, dibutylamine and 1,3,5-triazine and N, N'-bis (2,2,6 , 6-tetramethyl-4-piperidyl) butylamine, poly [ ⁇ (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl ⁇ ⁇ (2,2,6,6-tetramethyl-4-piperidyl) imino ⁇ hexamethylene ⁇ (2,2,6,6-tetramethyl-4-piperidyl) imino ⁇ ], 1,6-hexanediamine-N, N'-bis (2,2,6,6-tetramethyl- Poly
  • High molecular weight HALS polymer of dimethyl succinate and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol, 1,2,3,4-butanetetracarboxylic acid and 1,2,2 , 6,6-pentamethyl-4-piperidinol and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro [5,5] undecane
  • the thickness of the antioxidant film 51 is preferably 5 nm or more and 100 nm or less.
  • the film thickness is less than 5 nm, the gas barrier property of the antioxidant film is insufficient.
  • the amount of the antioxidant is small, the oxygen gas easily reaches the molded part 50, and oxidative degradation easily proceeds.
  • the film thickness is greater than 100 nm, the adhesion of the antioxidant film is deteriorated, and film peeling is likely to occur when the antireflection film 52 is provided.
  • the antioxidant film 51 functions effectively when the film thickness is 5 nm or more and 100 nm or less.
  • the molded part 50 may contain an antioxidant. For example, by including 1 to 2% by mass of an antioxidant in the molded part 50, it is possible to improve light resistance while suppressing the occurrence of bleeding out.
  • the antireflection film 52 may have a single layer structure or a multiple layer structure. Even if the antireflection film 52 has a single-layer structure, the antireflection function can be sufficiently exerted, but a multi-layer structure composed of two or more layers can enhance the antireflection effect.
  • At least one layer of the antireflection film 52 is an inorganic compound layer (a layer composed of an inorganic compound), and the inorganic compound layer includes Si, Al, Zr, Ti, Ta, Ce, Hf, and La. , Ge contains at least one element.
  • the layer can be composed of SiO 2 , Al 2 O 3 , ZrO 2, or the like.
  • the resin having the alicyclic hydrocarbon structure is injection-molded on a mold under a certain condition to form a molded part 50 having a predetermined shape. Further, in order to improve the light resistance, 1 to 2% by mass of an antioxidant may be contained in the molded part 50. (Formation of the antioxidant film 51) Then, the antioxidant film
  • a solvent containing the antioxidant and the resin material (binder) is applied to the surface of the optical element (for example, the surface 37a of the molding unit 50) by spin coating and dried by heating to form the surface of the optical element (molding).
  • An antioxidant film 51 is formed on the surface 37a) of the part 50.
  • the antioxidant film 51 may be formed on the front surface 37a and the back surface 37b of the objective lens 37, or the antioxidant film 51 may be formed on one of the surfaces.
  • a specific method for forming the antioxidant film 51 (organic film layer) will be described below.
  • a mixture of a resin material (binder) having a desired composition ratio and an antioxidant is dissolved in a solvent.
  • the solution is dropped onto the molding unit 50 and is formed by rotating using a spin coater.
  • membrane 51 is formed into a film by making it dry for 5 hours or more on the reduced pressure conditions of 0.1 Pa or less with a vacuum dryer.
  • a high boiling point solvent having a boiling point of 100 ° C. or higher is used as the solvent, the solvent can be completely removed by heating at 90 ° C. or lower during drying under reduced pressure to increase the degree of vacuum.
  • the film thickness of the antioxidant film 51 can be controlled by appropriately adjusting the concentration of the mixture solution of the resin material (binder) and the antioxidant, the dripping amount of the mixture solution, and the rotation speed during spin coating. (Formation of antireflection film 52) Thereafter, an antireflection film 52 is formed on the antioxidant film 51. This step is performed by a vapor phase method such as a vacuum evaporation method. An inorganic compound serving as a deposition source of the antireflection film 52 is placed in the chamber of the vapor deposition machine, and the antireflection film 52 is formed on the antioxidant film 51. At this time, a gas such as oxygen is introduced into the chamber as necessary.
  • the antireflection film 52 when the antireflection film 52 is composed of a plurality of layers, a multilayer film can be obtained by performing vapor deposition by sequentially changing the compound of the vapor deposition source.
  • the thickness of the antireflection film 52 can be freely changed in light of the optical function of the target optical element and the mechanical characteristics of the antireflection film 52.
  • the antireflection film 52 can be formed by other vapor phase methods such as a sputtering method, a CVD method, and a plasma CVD method in addition to the vacuum evaporation method.
  • Blue laser light is emitted from the semiconductor laser oscillator 32 during an operation of recording information on the optical disc D or an operation of reproducing information recorded on the optical disc D.
  • the emitted blue laser light passes through the collimator 33 and is collimated into infinite parallel light, then passes through the beam splitter 34 and passes through the quarter wavelength plate 35. Furthermore, after passing through the blue laser beam aperture 36 and the objective lens 37, forms a converged spot on an information recording surface D 2 through the protective substrate D 1 of the optical disc D.
  • Blue laser light that formed the concentrated light spot is modulated by the information recording surface D 2 of the optical disk D by the information bits, is reflected by the information recording surface D 2. Then, the reflected light is sequentially transmitted through the objective lens 37 and the diaphragm 36, the polarization direction is changed by the quarter wavelength plate 35, and the reflected light is reflected by the beam splitter 34. Thereafter, the reflected light passes through the sensor lens group 38 to be given astigmatism, is received by the sensor 39, and finally is photoelectrically converted by the sensor 39 to become an electrical signal.
  • the surface of the resin-made molded part 50 having an alicyclic hydrocarbon structure contains 5% by mass to 90% by mass of antioxidant with respect to the total mass of the antioxidant film 51.
  • the film 51 By forming the film 51, it is possible to suppress the progress of oxidative cleavage of the resin molecular chain that proceeds from the surface of the molding part 50.
  • an antioxidant film 51 in which an antioxidant is contained in a resin material (binder) is formed on the surface of the molded part 50 without directly forming a film made of only the antioxidant on the surface of the molded part 50. Therefore, high adhesion of the antioxidant film 51 can be obtained.
  • the antioxidant film 51 is formed on the surface of the molded part 50 without dispersing the antioxidant at a high concentration of 5% by mass or more and 90% by mass or less in the molded part 50, bleeding out during molding is prevented. Occurrence can be suppressed.
  • Example 1 As a binder, tetracyclo [4.4.0.1 2,5 .
  • a resin material having an alicyclic hydrocarbon structure made of a copolymer of 1 7,10 ] -3-dodecene and ethylene was used.
  • CHIMASSORB 944 FDL manufactured by Ciba Japan Co., Ltd.
  • an antireflection film 52 was formed on the optical element made of resin (APEL or the like is a good example) using silicon oxide SiO 2 and zirconium oxide ZrO 2 as an evaporation source.
  • the layer structure is 1: silicon oxide film, 2: zirconium oxide film, 3: silicon oxide film in order from the resin substrate side. This was designated as Sample 1.
  • Sample 4 Sample 4 was produced by the same production method as in Example 1 except that the antioxidant was changed to CHIMASSORB 770 DF (manufactured by Ciba Japan Co., Ltd.) having a molecular weight of 481.
  • Sample 7 was produced by the same production method as in Example 2 except that the concentration of the mixed solution of the binder and the antioxidant was changed to 3% by mass.
  • Example 8 Sample 8 was produced by the same production method as in Example 7, except that the antioxidant was changed to CHIMASSORB 770 DF having a molecular weight of 481.
  • Sample 9 was produced by the same production method as in Example 7 except that the molecular weight of the binder was changed to 11000.
  • Sample 10 was produced by the same production method as in Example 9 except that the antioxidant was changed to CHIMASSORB 770 DF having a molecular weight of 481.
  • Sample 11 was produced by the same production method as in Example 2 except that the concentration of the mixed solution of the binder and the antioxidant was changed to 1% by mass.
  • Sample 12 was produced by the same production method as in Example 5 except that the concentration of the mixed solution of the binder and the antioxidant was changed to 1% by mass.
  • Sample 13 was produced by the same production method as in Example 2 except that the molecular weight of the binder was changed to 8000.
  • Sample 14 was produced by the same production method as in Example 2 except that the concentration of the mixed solution of the binder and the antioxidant was changed to 0.5% by mass.
  • Sample 15 was produced by the same production method as Comparative Example 3 except that the antioxidant was changed to CHIMASSORB 770 DF having a molecular weight of 481.
  • Sample 16 was produced by the same production method as in Example 2 except that the concentration of the mixed solution of the binder and the antioxidant was changed to 4% by mass.
  • Example 17 Sample 17 was produced by the same production method as Comparative Example 5 except that the antioxidant was changed to CHIMASSORB 770 DF having a molecular weight of 481.
  • Sample 19 was produced by the same production method as Comparative Example 7 except that the antioxidant was changed to CHIMASSORB 770 DF having a molecular weight of 481.
  • Comparative Example 3 As Comparative Example 3, similarly to Example 1, a molded part 50 containing 2 mass% antioxidant was produced. The antioxidant film 51 was not formed on the surface of the molded part 50.
  • membrane 51 in the sample 2 to the sample 12 was 55 nm, 45 nm, 60 nm, 52 nm, 48 nm, 95 nm, 98 nm, 48 nm, 53 nm, 5 nm, 6 nm in order.
  • the thickness of the antioxidant film 51 in the samples 13 to 26 was 62 nm, 58 nm, 3 nm, 3 nm, 152 nm, 141 nm, 57 nm, 64 nm, 0 nm, 0 nm, 49 nm, 58 nm, 53 nm, and 49 nm in this order.
  • the film thickness of the antioxidant film 51 is less than 5 nm as in the sample 14 (Example 14) and the sample 15 (Example 15), the light resistance (aberration fluctuation) although the barrier effect by the antioxidant film was observed. ⁇ SA) and white turbidity slightly decreased.
  • the film thickness of the antioxidant film 51 is thicker than 100 nm as in the sample 16 (Example 16) and the sample 17 (Example 17), the adhesion of the film is slightly lowered. For this reason, although the barrier effect by the antioxidant film was observed, the light resistance (aberration fluctuation ⁇ SA) and the white turbidity characteristic were slightly lowered due to permeation of oxygen gas from the film interface where the adhesion was lowered.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
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Abstract

L'invention porte sur un élément optique qui comprend un film d'antioxydation ayant une adhérence améliorée et qui a une résistance à la lumière améliorée. Une lentille de focalisation (37) en tant que mode de réalisation de l'élément optique comprend une partie moulée (50) constituée d'une résine ayant une structure d'hydrocarbure alicyclique, un film d'antioxydation (51) formé sur la surface optique de la partie moulée (50) et un film antireflet (52) formé sur le film d'antioxydation (51). Le film d'antioxydation (51) est constitué d'un film organique contenant un antioxydant en une quantité de 5-90% en masse par rapport à la masse totale du film d'antioxydation (51). Le film organique est formé par application d'un solvant contenant l'antioxydant et un matériau de résine à la surface optique.
PCT/JP2010/053640 2009-03-30 2010-03-05 Élément optique et procédé de fabrication d'élément optique Ceased WO2010116829A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120057447A1 (en) * 2010-09-02 2012-03-08 Sanyo Electric Co., Ltd. Objective lens for optical pickup and optical pickup device

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Publication number Priority date Publication date Assignee Title
WO2000078879A1 (fr) * 1999-06-24 2000-12-28 Nippon Arc Co., Ltd. Article enrobe
JP2001348513A (ja) * 2000-06-08 2001-12-18 Jsr Corp 硬化性樹脂組成物、硬化膜及び複合体
JP2003128713A (ja) * 2001-10-17 2003-05-08 Tokuyama Corp 硬化性組成物
JP2005259302A (ja) * 2004-03-15 2005-09-22 Konica Minolta Opto Inc 光学素子及びその製造方法

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
WO2000078879A1 (fr) * 1999-06-24 2000-12-28 Nippon Arc Co., Ltd. Article enrobe
JP2001348513A (ja) * 2000-06-08 2001-12-18 Jsr Corp 硬化性樹脂組成物、硬化膜及び複合体
JP2003128713A (ja) * 2001-10-17 2003-05-08 Tokuyama Corp 硬化性組成物
JP2005259302A (ja) * 2004-03-15 2005-09-22 Konica Minolta Opto Inc 光学素子及びその製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120057447A1 (en) * 2010-09-02 2012-03-08 Sanyo Electric Co., Ltd. Objective lens for optical pickup and optical pickup device
US8406108B2 (en) * 2010-09-02 2013-03-26 Sanyo Electric Co., Ltd. Objective lens for optical pickup and optical pickup device

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