WO2003062903A1 - Filtre optique et procede de production - Google Patents

Filtre optique et procede de production Download PDF

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Publication number
WO2003062903A1
WO2003062903A1 PCT/JP2003/000468 JP0300468W WO03062903A1 WO 2003062903 A1 WO2003062903 A1 WO 2003062903A1 JP 0300468 W JP0300468 W JP 0300468W WO 03062903 A1 WO03062903 A1 WO 03062903A1
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WIPO (PCT)
Prior art keywords
optical
layer
birefringent
forming material
filter
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PCT/JP2003/000468
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English (en)
Japanese (ja)
Inventor
Katsuichi Machida
Masuhiro Shouji
Original Assignee
Kureha Kagaku Kogyo Kabushiki Kaisha
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Application filed by Kureha Kagaku Kogyo Kabushiki Kaisha filed Critical Kureha Kagaku Kogyo Kabushiki Kaisha
Priority to JP2003562704A priority Critical patent/JPWO2003062903A1/ja
Publication of WO2003062903A1 publication Critical patent/WO2003062903A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements

Definitions

  • Patent application title Optical filter and manufacturing method thereof
  • the present invention relates to an optical image processing apparatus including an image sensor including a CCD element (charge-coupled element) and a MOS element (metal-oxide-semiconductor-semiconductor element), and optical devices used in other optical devices. More specifically, the present invention relates to an optical filter having a birefringent functional layer composed of a birefringent polymer film, and a method for producing the same.
  • an imaging optical system using an imaging element such as a CCD element or a MOS element
  • a high spatial frequency component of subject light is limited, and the light generated by the subject due to the generation of a pseudo signal is In order to remove different color light components, it is necessary to use an optical low-pass filter. '
  • an optical low-pass filter As such an optical low-pass filter, a birefringent type using, for example, quartz or the like, which utilizes optical low-pass characteristics by separating an ordinary ray and an extraordinary ray in a birefringent substance, is often used.
  • the polymer film when such a polymer film is put to practical use as one element of a filter, the polymer film usually has two thicknesses because it has a small thickness, is flexible and has no self-retaining property. It has been practiced to sandwich a glass plate between two glass plates to form a filter.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a birefringent functional layer composed of a birefringent polymer film so that the whole is thin and various optical devices are provided.
  • An object of the present invention is to provide an optical filter which can be suitably applied to the optical filter.
  • Another object of the present invention is to provide a method capable of easily manufacturing the above optical filter.
  • the optical filter of the present invention comprises a transparent substrate having non-deformability, and a birefringent polymer film integrally provided on at least one surface of the transparent substrate via a cured adhesive layer.
  • the birefringent functional layer may be formed of a single birefringent polymer film, or a plurality of optical films including at least one birefringent polymer film may be integrally laminated with each other via a cured adhesive layer. Formed by the film laminate
  • the surface of the protective layer is an optical plane.
  • the method for producing an optical filter according to the present invention comprises the steps of: forming a birefringent functional layer forming material including a birefringent polymer film having an optical low-pass function on at least one surface of a non-deformable transparent substrate; A filter-precursor forming step of forming a filter precursor in which a protective layer forming material layer made of an ultraviolet curable resin is formed on the surface of the birefringent functional layer forming material, while being arranged via an adhesive layer. And an optical plane transfer member arranging step of arranging an optical plane transfer member having an optical plane with respect to the filter precursor so that the optical plane is in contact with the surface of the protective layer forming material layer.
  • the protective layer forming material layer is cured to form a protective layer having an optical plane, Between the birefringent functional layer forming material and the transparent substrate Curing treatment step of curing the adhesive layer to form a cured adhesive layer;
  • a plurality of optical films including a birefringent polymer film having at least one optical low-pass function are formed on at least one surface of a non-deformable transparent substrate.
  • the birefringent functional layer forming material laminated via the adhesive layer is arranged via the ultraviolet curable adhesive layer, and the surface of the birefringent functional layer forming material is formed of an ultraviolet curable resin.
  • the protective layer forming material layer is cured to form a protective layer having an optical plane
  • a cured adhesive layer is formed by curing the adhesive layer between the optical films constituting the birefringent functional layer forming material and the adhesive layer between the birefringent functional layer forming material and the transparent substrate. Curing process and
  • the birefringent polymer film is composed of a liquid crystalline monomer component composed of a monomer exhibiting a liquid crystal phase at room temperature, and a polyfunctional monomer copolymerized with the monomer of the liquid crystalline monomer component. It is preferable that the polymerizable liquid crystal composition obtained by polymerizing a polymerizable liquid crystal composition containing a crosslinkable monomer component having a thickness of 50 to 200 and a haze value of 1.5 or less is obtained. .
  • the transparent substrate a substrate having an infrared non-transmission property and / or a visibility correction function can be used.
  • the curing treatment step can be performed in a state where tension is applied to each of the birefringent polymer film constituting the filter precursor, and when other optical films are used. It is.
  • the birefringent functional layer composed of the birefringent polymer film is provided integrally on a non-deformable transparent substrate, for example, as an optical low-pass filter
  • the birefringent functional layer has a plurality of birefringent polymer films or has another optical film having appropriate optical characteristics together with the birefringent polymer film, An optical filter that exhibits desired optical characteristics as a whole can be easily provided according to the configuration.
  • the surface of the protective layer can easily obtain the optical flatness similar to the optical flatness of glass usually obtained by polishing, etc., by transfer, so that the scattering of incident light and light scattering due to irregular reflection can be obtained. Excellent performance can be obtained in that loss is small and distortion applied to the processed image is small.
  • the birefringent functional layer is integrally provided on a non-deformable transparent substrate, it can be handled as a single optical filter as a whole, so it can be applied or mounted to various optical devices. It is convenient in doing.
  • the birefringent polymer film produced by a method of polymerizing a liquid crystalline monomer component and a crosslinkable monomer component has a small thickness and a low haze value by selecting the type of each monomer. It has small features. According to the configuration of the present invention, by forming the birefringent functional layer using such a birefringent polymer film, the purpose of the present invention can be achieved without impairing the features of the birefringent polymer film. An optical filter having the following optical performance can be reliably obtained.
  • an optical element that is difficult to realize only with the birefringent functional layer alone is used.
  • An optical filter having characteristics easily and weighted can be provided.
  • the birefringent polymer film and the other optical film constituting the birefringent functional layer have a flat plate shape extending along a plane, and have a local shape such as wrinkles.
  • the joining of the birefringent functional layer forming material to the transparent substrate and the optical Since the formation of the protective layer having a flat surface can be achieved at the same time, the intended optical filter can be manufactured very easily.
  • the formation of the birefringent functional layer is performed by bonding the birefringent functional layer to the transparent substrate. Since it can be achieved at the same time as the formation of the protective layer, the intended optical filter can be produced very easily.
  • FIG. 1 is an explanatory cross-sectional view schematically showing a configuration of an example of the optical filter of the present invention.
  • FIG. 2 is a cross-sectional view for explaining a state in which a lower adhesive layer is provided on a transparent substrate in a process of manufacturing the optical filter of FIG.
  • FIG. 3 is a cross-sectional view for explaining an optical plane transfer member disposing step and a curing step in the production of the optical filter of FIG.
  • FIG. 4 is an explanatory sectional view showing an example of a preferred method for producing a birefringent polymer film.
  • FIG. 5 is an explanatory diagram of an alignment treatment of liquid crystal molecules of a liquid crystal compound in a photopolymerizable liquid crystal composition.
  • FIG. 1 is an explanatory cross-sectional view schematically showing the configuration of an example of the optical filter of the present invention.
  • the optical filter 10 of this example is an optical filter having a laminated birefringent functional layer formed by laminating three optical films.
  • This optical filter 10 is provided with a birefringent functional layer integrally formed on a surface of a transparent substrate 12 via a cured adhesive layer 14 via a film laminate 20 having a configuration described later.
  • a protective layer 30 On the surface of the film laminate 20, a protective layer 30 whose exposed surface 31 is an optical plane is formed.
  • the transparent substrate 12 is a non-deformable or rigid plate-like member, and an organic material or an inorganic material can be used as the material.
  • organic materials include polyethylene terephthalate, polycarbonate, polyimide, polymethyl methacrylate, polystyrene, polyethylene, polychlorinated butyl, polytetrafluoroethylene, polychlorofluoroethylene, polyarylate, polysnoreon, senorelose, Resin materials such as polyetherenothenoketone can be used.
  • specific examples of the inorganic material include quartz, lithium niobate, transparent birefringent materials such as rutile and calcite, glass, and silicon.
  • the thickness of the transparent substrate 12 varies depending on the type of the material, but it is necessary that the transparent substrate 12 have a certain thickness or more in order to obtain sufficient non-deformability, for example, 0.2 to 1.2. O mm thickness.
  • the film laminate 20 is formed by joining the second optical film F2 to the surface of the first optical film F1 via the first interlayer cured adhesive layer B1 and the second optical film F1.
  • the third optical film F3 is joined to the surface of the second through a second interlayer cured adhesive layer B2, and is an integral unit.
  • the first optical film F1 and the third optical film F3 are birefringent polymer films having the same orientation angle but different orientation directions.
  • Film F 2 is a 1 Z 4 wave plate.
  • the “orientation angle” is the angle formed by the optical axis with respect to the film surface
  • the “orientation direction” is the direction of image separation that exhibits an optical low-pass filter effect. At the angle between the specific reference side and the liquid crystal skeleton.
  • each optical film constituting the birefringent functional layer is not particularly limited, and varies depending on the type. However, it is preferable that the thickness be small in order to ensure high transparency.
  • the range is 0 0 // m.
  • the cured adhesive layer 14 is for integrally bonding the film laminate 20 to the transparent substrate 12 and preferably has high transparency.
  • any of the interlayer cured adhesive layers integrally bond the related optical films. Things. That is, the first interlayer cured adhesive layer B1 joins the first optical film F1 and the second optical film F2, and the second interlayer cured adhesive layer B2 forms the second optical film F2. And the third optical film F3. It is preferable that these interlayer cured adhesive layers have high transparency.
  • the protective layer 30 is made of a resin or a polymer formed in a layer on the surface of the uppermost optical film, that is, in the illustrated example, the third optical film F3, and its exposed surface 31 is formed. It is an optical plane. It is preferable that the protective layer 30 also has high transparency.
  • optical plane refers to a surface having high flatness such that the number of Newton rings observed per unit area (1 cm 2 ) is 10 or less.
  • a glass plate can be usually used as an optical plane transfer member used to obtain an optical plane.However, an optical polishing is performed according to the required flatness. It can be properly used up to the glass level.
  • the second interlayer cured adhesive layer B 2) and the protective layer 30 made of resin are formed by curing an optical adhesive.
  • an ultraviolet-curable adhesive whose cured product has excellent light transmittance
  • an epoxy-based adhesive for example, an epoxy-based adhesive, a urethane-based adhesive, or an acryl-based adhesive
  • an adhesive it is preferable to use an adhesive.
  • optical adhesive examples include, for example, “Hard Rock OP” series and “Hard Rock UV” series (manufactured by Denki Kagaku Kogyo Co., Ltd.), and others.
  • the birefringent functional layer needs to include at least one birefringent polymer film.
  • at least one or two of the optical films are used.
  • At least one birefringent polymer film It is necessary that As long as this condition is satisfied, the number and types of other optical films are not particularly limited, and therefore all optical films are birefringent polymer films, and Any one of combinations of one or more birefringent polymer films and another optical film may be used.
  • the birefringent functional layer has a plurality of birefringent polymer films
  • the birefringent polymer films have the same optical characteristics but also have different optical characteristics. It may be.
  • optical film other than the birefringent polymer film include, for example, a 1Z 4 wavelength plate, a bandpass filter, a color capture plate, and a polymer film having other optical characteristics. it can.
  • the birefringent functional layer is constituted by the optical film including the birefringent polymer film, so that a single or a plurality of birefringent polymer films are formed.
  • Optical properties due to optical anisotropy or birefringence, such as the function of an optical low-pass filter, or the optical properties of a birefringent polymer film and another optical film in parallel Can provide an optical filter having practical optical characteristics as a whole because their optical characteristics are related to each other.
  • the incident light rays are directed in the horizontal direction and the vertical direction, respectively, by the two birefringent polymer films of the first optical film F1 and the third optical film F3.
  • the performance as an optical low-pass filter is exhibited, and the 1Z4 wavelength plate is combined as the second optical film F2, so that the first The polarization state of the light beam that has passed through the optical film F1 and separated into the ordinary light beam and the extraordinary light beam can be obtained as circularly polarized light. Therefore, according to the optical filter of this example, the incident light beam is By separating four points in the vertical direction, an optical low-pass filter action is exerted in the horizontal and vertical directions.
  • a 1Z4 wavelength plate is used. Because of its circular polarization conversion function, the beam separation distance in the horizontal direction and the vertical direction can be controlled independently of each other, so that the cut-off spatial frequency state of the optical low-pass filter can be controlled in the horizontal and vertical directions respectively. It can be realized independently.
  • the surface of the protective layer 30 is an optical plane 3OA, it is possible to obtain excellent performance such that light loss due to scattering or irregular reflection of incident light and image distortion are small.
  • the film laminate 20 is integrally provided on the non-deformable transparent substrate 12, it can be handled as one member as a whole. It is very convenient to apply or attach this to various optical devices.
  • Example 2 as the second optical film F2, a birefringent polymer film having an orientation angle of 45 degrees, an orientation direction of 45 degrees, a thickness of 70 ⁇ m, and a light separation distance of 2.5 m was used. Using.
  • the optical filter having the above configuration can be manufactured, for example, as follows.
  • a transparent substrate 12 is prepared, and a lower adhesive layer 14a made of an ultraviolet-curable adhesive is formed thereon, and a first light is formed on the lower adhesive layer 14a. Place the study film F1.
  • a first interlayer adhesive layer B 1 a made of an ultraviolet-curable adhesive is formed on the first optical film F 1, and the first eyebrow adhesive layer B is formed.
  • a second optical film F2 is arranged on 1a, and a second inter-brows adhesive layer B2a made of an ultraviolet curable adhesive is formed on the second optical film F2.
  • the third optical film F3 is arranged on the inter-layer adhesive layer B2a. Then, on the third optical film F3, a protective layer forming material layer 30a made of an ultraviolet-curable adhesive is formed.
  • a film laminate forming material 20 a On the surface of the transparent substrate 12, through the lower adhesive layer 14 a, three optical films (Fl, F 2 and F 3) and two interlayer adhesive layers ( B 1 a and B 2 a) are laminated to form a film laminate forming material 20 a, whereby a protective layer forming material layer 30 a is formed on the surface of the film laminate forming material 20 a.
  • the formed filter precursor 10a is formed.
  • optical plane transfer member 40 made of a glass plate having an optical plane 42 is placed on the surface of the protective layer forming material layer 30a with respect to the filter precursor 10a. Placed in contact with each other (optical plane transfer member arranging step), and the upper surface of the protective layer forming material layer 30a of the filter precursor 10a is pressed downward by the optical plane transfer member 40. In this state, ultraviolet rays are irradiated through one or both of the transparent substrate 12 and the optical plane transfer member 40 (curing process). It is preferable that the optical flat surface 42 of the above-mentioned optical flat surface transfer member 40 is subjected to an appropriate release treatment.
  • the lower adhesive layer 14a is cured to form the cured adhesive layer 14, and the two interlayer adhesive layers (Bla and B2a) are cured to form two cured adhesive layers.
  • the layers (B1 and B2) are formed, and the protective layer forming material layer 30a is cured to form the protective layer 30.
  • the film laminate 20 in a state where the three optical films (Fl, 2 ⁇ 3) are integrally bonded to each other by the two eyebrow curing adhesive layers (B1 and B2) is cured and adhered.
  • the shape of the optical plane 42 of the optical plane transfer member 40 is transferred.
  • the surface of the protective layer 30 is an optical flat surface, and an optical filter having the intended laminated birefringent functional layer is manufactured.
  • the film laminate forming material 20 a in the filter precursor 10 a is pressed downward between the transparent substrate 12 by the optical planar transfer member 40, that is, the film laminate Since the curing process by irradiation with ultraviolet light is performed in a state where the local displacement of each optical film (Fl, F2 and F3) forming the forming material 20a is suppressed, each optical film is effectively (F1, F2 and F3) in the same state as when tension is applied, the adhesive layer in contact with both sides of each optical film (Fl,? 2 ⁇ ?
  • each optical film (Fl, F2 and F3) can be reliably maintained in the desired flat state and parallel state.
  • each adhesive layer (lower adhesive layer 14a, interlayer adhesive layers B1a and B2a, and protective layer forming material layer 30a) flows during the curing process. It is preferable that the state with low property is maintained.
  • the adhesive has a high fluidity, the possibility of local deformation of the optical film increases due to the local flow of the adhesive as curing proceeds. Therefore, if sufficient bonding properties can be obtained, an adhesive sheet which has been subjected to a preliminary or primary curing treatment called a so-called green sheet can be preferably used.
  • the birefringent function The layer is composed of an optical film made of a birefringent polymer film.
  • the birefringent polymer film preferably has high transparency, and specifically, preferably has a thickness of 50 to 200 ⁇ m and a haze value of 1.5 or less. '
  • Such a birefringent polymer film includes, for example, a liquid crystalline monomer component composed of a monomer that exhibits a liquid crystal phase at room temperature, and a polyfunctional copolymerizable with the monomer of the liquid crystalline monomer component.
  • a photopolymerizable liquid crystal composition is prepared by using a crosslinkable monomer component composed of a monomer, and the photopolymerizable liquid crystal composition is formed inside a casting glass cell having a molding space formed by a flat gap.
  • An object is filled to form a thin layer, and a parallel magnetic field having a high intensity of, for example, 3 Tesla or more, preferably 5 to 10 Tesla at room temperature (for example, 25 ° C.), and
  • the liquid crystal molecules of the liquid crystalline monomer component are aligned to obtain a state in which the liquid crystal molecules of the liquid crystalline monomer component are aligned.
  • the direction of the parallel magnetic field with respect to the thin layer of the photopolymerizable liquid crystal composition is, for example, 45 degrees with respect to the surface of the thin layer or in the vicinity thereof in order to obtain a polymer film having high birefringence.
  • the direction of the parallel magnetic field with respect to the thin layer of the photopolymerizable liquid crystal composition is, for example, 45 degrees with respect to the surface of the thin layer or in the vicinity thereof in order to obtain a polymer film having high birefringence.
  • the direction of the parallel magnetic field with respect to the thin layer of the photopolymerizable liquid crystal composition is, for example, 45
  • the monomer constituting the liquid crystalline monomer component of the photopolymerizable liquid crystal composition for example, a monofunctional acrylate compound or a monofunctional methacrylate compound which exhibits a liquid crystal phase at room temperature is preferably used.
  • a polyfunctional acrylate compound having three or more benzene nuclei in the molecule or a polyfunctional methacrylate compound is preferably used.
  • the polybenzene nuclei constituting the crosslinkable monomer component are subjected to the alignment treatment by the parallel magnetic field. Since the contained compound exerts an action of alleviating the degree to which the orientation state of the liquid crystalline monomer component is disturbed, the finally obtained birefringent polymer film should have extremely high transparency. Become.
  • the birefringent polymer film preferably has a large birefringence, that is, a large anisotropy of the refractive index.
  • the lower limit of the anisotropy of the refractive index is the same as that of quartz.
  • the refractive index is preferably larger than the anisotropy (0.009), for example, 0.01 or more, particularly preferably 0.02 or more. According to those satisfying such conditions, for example, when the target optical filter is an optical low-pass filter, the thickness can be sufficiently reduced, which is suitable as an optical low-pass filter for an imaging device. It will be.
  • the upper limit of the anisotropy of the refractive index is preferably not more than 0.35, particularly preferably not more than 0.3 from the viewpoint of the stability of the liquid crystal.
  • a birefringent polymer film with an appropriate correction plate, a composite optical filter with the characteristics that the intensity of the ordinary light and the extraordinary light of the subject light becomes equal You can get As such a correction plate, a general quarter-wave plate can be used, but it is also effective to use a depolarizing plate in order to make it non-polarized.
  • these wave plates for example, polycarbonate, polyvinyl alcohol, a cycloolefin polymer commercially available as "ARTON" (trade name) or "ZONEX" (trade name), or a plate made of other materials may be used. Can be.
  • the birefringent polymer film and other optical films used in the present invention are non-reflective on one or both of the two surfaces of the film by a vacuum deposition method, a dive method, or the like in order to increase the light transmittance.
  • a coating layer may be formed.
  • the surface of the completed optical filter can be provided with an anti-reflection coating by a vacuum evaporation method or a dive method as required.
  • the transparent substrate for example, a substrate having optical characteristics such as infrared non-transparency and visibility correction function can be used. In this case, the optical characteristics of the birefringent functional layer are reduced. In addition, since the optical characteristics of the transparent substrate are exhibited at the same time, a more practical optical filter can be obtained in practical use.
  • Examples of a device having a visibility correction function include a phosphoric acid glass in which copper ions are introduced, and a near-infrared blocking interference filter formed by laminating an optical multilayer film on a glass substrate surface by a vacuum evaporation method.
  • plastics for example, a copolymer obtained by polymerizing a mixed monomer composed of a phosphoric acid group-containing acrylic monomer and a monomer copolymerizable therewith.
  • a metal salt mainly composed of a copper salt see Japanese Patent Application Laid-Open No. HEI 6-118282
  • the optical filter according to the present invention has a birefringent functional layer integrally provided on a transparent substrate by a cured adhesive layer, and the surface of a protective layer forming an exposed surface is an optical flat surface. Therefore, it exhibits practically useful optical characteristics including the function of the birefringent polymer film in the birefringent functional layer, that is, the function as an optical low-pass filter due to birefringence, and has a small thickness. And very lightweight Therefore, the present invention can be very suitably applied to a device using an image sensor such as a CCD device and a MOS device such as a video camera.
  • the birefringent functional layer is a laminated type having a plurality of optical films. That is not essential. That is, in the present invention, the birefringent functional layer can be constituted by only a single birefringent polymer film.
  • the birefringent polymer film was integrally bonded on the transparent substrate via the cured adhesive layer, and the protective layer was formed on the surface of the birefringent polymer film. Configuration.
  • the optical filter 1 having such a configuration can be manufactured by a method according to the method for manufacturing an optical filter in which the birefringent functional layer is a laminated type, and the same effect can be obtained.
  • two molding substrates 52, 52 each made of glass having a diameter of 40 mm and a thickness of 3 mm were opposed to each other in parallel with a gap of 0.1 mm.
  • a sealing tape 54 in common over the outer peripheral surfaces of the two molding substrates 52, 52, a circular sealed molding space having a diameter of 40 mm and a thickness of 0.1 mm is formed.
  • a glass cell 50 for casting was produced.
  • the glass plate used here has been subjected to a plasma cleaning treatment after normal cleaning.
  • the photopolymerizable liquid crystal composition was injected into the molding space of the casting glass cell 50 warmed to 50 ° C. to form a thin layer L of the photopolymerizable liquid crystal composition.
  • the inlet was sealed with a sealing tape, and then heated to 50 ° C. in a light-shielded atmosphere.
  • the glass cell 50 for casting in which the photopolymerizable liquid crystal composition was sealed was placed in a parallel magnetic field having a strength of 5 Tesla, and the direction of the magnetic field lines with respect to the surface of the molding substrate 52 was measured. (Indicated by the arrow J in FIG. 5.)
  • the glass cell 50 for casting was placed on and supported by a cell table (not shown) that was held at an angle of 0 to 45 degrees.
  • the liquid crystal molecules M in the photopolymerizable liquid crystal composition were aligned by holding the liquid for 4 minutes while cooling so that the liquid crystal composition was maintained at a temperature of ° C. Thereafter, an intensity of 16 mW / cm 2 was obtained using an ultraviolet radiation lamp. Ultraviolet rays were irradiated at room temperature for 60 seconds to perform photopolymerization of the photopolymerizable liquid crystal composition.
  • the molding composite obtained as described above was left in an oven at a temperature of 85 ° C for 15 hours to perform post-polymerization treatment, and then cooled to room temperature.
  • the glass cell was disassembled to obtain a polymer film FA having a thickness of 100 ⁇ .
  • This polymer film F exhibits birefringence, and the image separation amount is 3.7 m.
  • the haze value was 1.2, indicating a very high transparency.
  • polymer film FB a film having the same shape and characteristics produced by the same method as that of the above-mentioned polymer film FA was used.
  • a transparent glass plate having a thickness of 0.5 mm is used as a transparent substrate, and a lower adhesive layer 14a is formed on the upper surface thereof with an ultraviolet curable adhesive.
  • the above-mentioned polymer film FA was arranged as a first optical film.
  • a first interlayer adhesive layer B1a is formed on the polymer film FA using the same ultraviolet curable adhesive as described above, and 1Z4 is formed on the first interlayer adhesive layer B1a.
  • a 100 ⁇ thick polymer film made of polyvinyl alcohol having a function as a wave plate is disposed as a second optical film F 2, and a first interlayer adhesive is formed on the second optical film F 2.
  • a second interlayer adhesive layer B 2 a is formed in the same manner as the agent layer ⁇ 1 a, and the polymer film FB is placed on the third optical film F on the second interlayer adhesive layer B 2 a. As No. 3, they were arranged so that their orientation directions differed by 90 degrees from the first optical film F1.
  • a protective layer forming material layer 30a having a thickness of 20 was formed on the polymer film FB by using the same ultraviolet curable adhesive as described above, thereby producing a filter precursor 10a. .
  • the obtained filter precursor 10a is supported on an inclined support surface, and an optical plane transfer member 40 made of a glass plate is disposed on the filter precursor 10a, and the optical plane 42 is formed on the protective layer. After performing an optical planar transfer member arranging step in contact with the surface of the forming material layer 30a, the optical planar transfer member 40 is moved to 9.8 N
  • the optical filter 1 thus obtained has a thickness of 5111, a first interlayer cured adhesive layer B 1 and a second interlayer cured adhesive layer B cured by the lower adhesive layer 14 a.
  • the thickness of both 2 is 10 ⁇
  • the thickness of the protective layer 30 is 15 ⁇
  • the total thickness is 840 / zm
  • the surface of the protective layer 30 is optical. The maximum number of Newton rings in an arbitrary area of 1 cm in length and 1 cm in width was examined.
  • the birefringent functional layer composed of the birefringent polymer film is provided integrally on a non-deformable transparent substrate, for example, as an optical low-pass filter
  • the birefringent functional layer has a plurality of birefringent polymer films or has another optical film having appropriate optical characteristics together with the birefringent polymer film, An optical filter that exhibits desired optical characteristics as a whole can be easily provided according to the configuration.
  • an optical plane transfer member having an optical plane an optical plane can be easily introduced to the surface of the protective layer, and light loss due to scattering or irregular reflection of incident light is small, and Excellent performance can be obtained in that the distortion applied to the processed image is small.
  • the birefringent functional layer is integrally provided on a non-deformable transparent substrate, it can be handled as one optical filter as a whole, and therefore can be applied or mounted to various optical devices. This is convenient for cleaning.
  • the birefringent polymer film produced by a method of polymerizing a liquid crystalline monomer component and a crosslinkable monomer component has a small thickness and a haze by selecting the type of each monomer. It has the feature of small value.
  • a birefringent functional layer is formed using such a birefringent polymer film. This makes it possible to reliably obtain an optical filter having the intended optical performance without impairing the characteristics of the birefringent polymer film.
  • an optical element that is difficult to be realized only by the birefringent functional layer is used. It is possible to provide an optical filter having the weight characteristic easily and weight.
  • the birefringent polymer film and the other optical film constituting the birefringent functional layer have a flat plate shape extending along a plane, and have a local shape such as wrinkles.
  • the bonding of the birefringent functional layer forming material to the transparent substrate and the formation of a protective layer having an optical plane are simultaneously achieved. Therefore, the intended optical filter can be manufactured very easily.
  • the formation of the birefringent functional layer is performed by bonding the birefringent functional layer to the transparent substrate. Since it can be achieved at the same time as the formation of the protective layer, the intended optical filter can be produced very easily.

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  • Polarising Elements (AREA)

Abstract

L'invention concerne un filtre optique comprenant une couche fonctionnelle biréfringente composée d'un film polymérique biréfringent et pouvant être appliqué, de préférence, dans divers dispositifs optiques, ainsi qu'un procédé de fabrication de celui-ci. Le filtre optique comprend une couche fonctionnelle biréfringente placée sur un substrat transparent non déformable avec une couche adhésive durcissable interposée entre les deux et une couche de résine protectrice sur la couche fonctionnelle. La couche fonctionnelle biréfringente est composée d'un film polymérique biréfringent ou de films optiques comprenant un film polymérique biréfringent et en alternance avec des couches adhésives. La surface de la couche protectrice constitue un plan optique. Le procédé consiste à produire une couche adhésive durcissable aux ultraviolets sur un substrat transparent et une couche de matériau formant une couche fonctionnelle biréfringente sur la couche adhésive, formant un précurseur filtrant comprenant une couche de matériau formant une couche protectrice de résine durcissable aux ultraviolets, à disposer un élément de transfert de plan optique de telle manière que le plan optique soit en contact avec la couche de matériau formant la couche protectrice, et à le comprimer et à l'irradier avec un rayonnement ultraviolet.
PCT/JP2003/000468 2002-01-21 2003-01-21 Filtre optique et procede de production WO2003062903A1 (fr)

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JP2003562704A JPWO2003062903A1 (ja) 2002-01-21 2003-01-21 光学フィルターおよびその製造方法

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JP2002-11784 2002-01-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007126108A1 (fr) * 2006-04-28 2007-11-08 Sumitomo Chemical Company, Limited Plaque polarisante composite et dispositif d'affichage a cristaux liquides l'utilisant
WO2007132940A1 (fr) * 2006-05-17 2007-11-22 Sumitomo Chemical Company, Limited Plaque polarisante, procédé de fabrication de la plaque polarisante, élément optique stratifié et dispositif d'affichage à cristaux liquides
KR20150023375A (ko) * 2012-06-25 2015-03-05 제이에스알 가부시끼가이샤 고체 촬상 소자용 광학 필터 및 그의 용도

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08335043A (ja) * 1995-06-09 1996-12-17 Omron Corp ドットマトリクス画像表示モジュールおよびその製造方法
US5820779A (en) * 1994-10-18 1998-10-13 Kureha Kagaku Kogyo Kabushiki Kaisha Polymeric optical low-pass filter and device thereof
JP2001075054A (ja) * 1999-09-02 2001-03-23 Dainippon Ink & Chem Inc 高分子製光学的ローパスフィルター、その製造方法及び高分子製光学的ローパスフィルター複合体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5820779A (en) * 1994-10-18 1998-10-13 Kureha Kagaku Kogyo Kabushiki Kaisha Polymeric optical low-pass filter and device thereof
JPH08335043A (ja) * 1995-06-09 1996-12-17 Omron Corp ドットマトリクス画像表示モジュールおよびその製造方法
JP2001075054A (ja) * 1999-09-02 2001-03-23 Dainippon Ink & Chem Inc 高分子製光学的ローパスフィルター、その製造方法及び高分子製光学的ローパスフィルター複合体

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007126108A1 (fr) * 2006-04-28 2007-11-08 Sumitomo Chemical Company, Limited Plaque polarisante composite et dispositif d'affichage a cristaux liquides l'utilisant
TWI449970B (zh) * 2006-04-28 2014-08-21 Sumitomo Chemical Co Composite polarizing plate and liquid crystal display device using the same
WO2007132940A1 (fr) * 2006-05-17 2007-11-22 Sumitomo Chemical Company, Limited Plaque polarisante, procédé de fabrication de la plaque polarisante, élément optique stratifié et dispositif d'affichage à cristaux liquides
KR20150023375A (ko) * 2012-06-25 2015-03-05 제이에스알 가부시끼가이샤 고체 촬상 소자용 광학 필터 및 그의 용도
KR101983742B1 (ko) 2012-06-25 2019-05-29 제이에스알 가부시끼가이샤 고체 촬상 소자용 광학 필터, 고체 촬상 장치 및 카메라 모듈

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