WO2016125616A1 - Procédé et appareil d'inspection de défauts pour film optique, procédé et appareil de fabrication de film optique - Google Patents

Procédé et appareil d'inspection de défauts pour film optique, procédé et appareil de fabrication de film optique Download PDF

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Publication number
WO2016125616A1
WO2016125616A1 PCT/JP2016/052020 JP2016052020W WO2016125616A1 WO 2016125616 A1 WO2016125616 A1 WO 2016125616A1 JP 2016052020 W JP2016052020 W JP 2016052020W WO 2016125616 A1 WO2016125616 A1 WO 2016125616A1
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Prior art keywords
optical film
defect inspection
orientation angle
film
main surface
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PCT/JP2016/052020
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English (en)
Japanese (ja)
Inventor
圭太 井村
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住友化学株式会社
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Publication of WO2016125616A1 publication Critical patent/WO2016125616A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined

Definitions

  • the present invention relates to an optical film defect inspection method, and also relates to an optical film defect inspection device, an optical film manufacturing method, and an optical film manufacturing device.
  • An optical film including an optical film main body such as a polarizing plate having polarizing properties and a retardation plate having birefringence as an optical film, and an adhesive material with a separate film attached to one main surface of these optical film main bodies Film is known.
  • Such an optical film is usually produced by continuously sticking an adhesive with a strip-shaped separate film while continuously transporting the strip-shaped optical film main body in the length direction, and the obtained optical film is continuous. Is conveyed.
  • Patent Documents 1 to 3 disclose this type of optical film defect inspection method.
  • the optical film main body is a polarizing plate
  • the defect inspection method by the light source provided on the other main surface side opposite to one main surface (surface on the side of the adhesive material with a separate film) in the optical film, Through a light irradiation step of irradiating light on the optical film and a transmission inspection device provided on one main surface side of the optical film, through a transmission inspection polarizing filter provided between the optical film and the transmission inspection device And a light receiving step for receiving light transmitted through the optical film, and the optical film is inspected for defects by a crossed Nicols transmission inspection using an optical film (polarizing plate) and a transmission inspection polarizing filter.
  • the defect inspection method uses a light source provided on the other main surface side of the optical film opposite to the one main surface (the surface on the side of the adhesive material with a separate film).
  • the light irradiation step of irradiating the optical film with light via the auxiliary polarizing filter for transmission inspection provided between the optical film and the light source, and the transmission inspection device provided on one main surface side of the optical film A light-receiving step of receiving light transmitted through the optical film via a transmission inspection polarizing filter provided between the optical film and the transmission inspection device, and a transmission inspection auxiliary polarizing filter and a transmission inspection polarizing filter
  • the optical film is inspected for defects by the crossed Nicols transmission inspection.
  • the separate film has an orientation angle based on birefringence. Therefore, in these crossed Nicols transmission inspections, the polarization axis of the polarizing filter for transmission inspection (for example, the rotation angle of the polarizing filter for transmission inspection) is adjusted in consideration of the orientation angle of the separate film in the adhesive material with a separate film. By doing so, the crossed Nicol state is realized.
  • a pressure-sensitive adhesive with a separate film used for the production of such an optical film for example, a material having a length of about several thousand meters is used.
  • an optical film body such as a polarizing plate or a retardation plate, for example, several
  • the adhesive material with a separate film is continuously attached to one optical film main body portion while being joined.
  • a separate film in this adhesive material with a separate film for example, a wide stretched film obtained by stretching a raw material film is cut into a plurality in the width direction according to the width of the optical film main body to be attached. Is used.
  • the orientation angle varies slightly in the width direction of the film, so that the orientation angle varies in the width direction due to a phenomenon called so-called bowing.
  • the orientation angle is different for each pressure-sensitive adhesive with a separate film.
  • the polarization axis of the polarizing filter for transmission test is set for each adhesive material with a separate film to be used. It needs to be adjusted.
  • the polarization axis of the polarization filter for transmission inspection is used to switch the roll of the adhesive material with a separate film. Even when adjusting the optical film body, the optical film body is continuously generated. For this reason, the region of the optical film obtained during this adjustment is an uninspected region. For example, if the time required for adjusting the polarization axis of a polarizing filter for transmission inspection is about 1 minute and the line speed is about 10 to 30 m / min, an optical film of about 10 to 30 m can be obtained in one switching of the adhesive with a separate film. The area becomes uninspected.
  • the present invention provides an optical film defect inspection method capable of shortening the adjustment time of the polarization axis of the polarizing filter for crossed Nicol method transmission inspection required due to variations in the orientation angle of the separate film.
  • Another object of the present invention is to provide an optical film defect inspection apparatus, an optical film manufacturing method, and an optical film manufacturing apparatus.
  • an optical film formed by attaching a separate film-attached adhesive material to one main surface of the optical film main body portion, one main surface side or the other of the adhesive film-attached adhesive material side.
  • a light source provided on the main surface side, a transmission inspection device provided on the opposite side of the light source with respect to the optical film, and a transmission inspection provided between one main surface of the optical film and the light source or transmission inspection device.
  • the defect inspection method includes an orientation angle measuring step of measuring the orientation angle of a separate film with an orientation angle measuring device, and a polarizing filter based on the orientation angle measured in the orientation angle measuring step.
  • the optical film defect inspection apparatus is an optical film defect inspection apparatus in which an adhesive material with a separate film is attached to one main surface of an optical film main body, and the optical film has an adhesive material side with a separate film.
  • a polarizing filter for transmission inspection provided between one main surface of the optical film and the light source or transmission inspection device, and one main surface side of the optical film to measure the orientation angle of the separate film And adjusting the polarization axis of the polarizing filter based on the orientation angle measured by the orientation angle measuring device, and then transmitting the light received by the transmission inspection device.
  • a defect inspection of the optical film based on the.
  • the orientation angle of the separation film is measured by the orientation angle measuring device, and the polarization axis of the polarizing filter is adjusted based on the measured orientation angle. It is possible to shorten the adjustment time of the polarization axis of the polarizing filter for crossed Nicols transmission inspection required due to the variation in the angle. As a result, when the cross-Nicol method transmission inspection is performed in-line, the optical film continuously generated when the polarization axis of the polarization filter for transmission inspection is adjusted to switch the roll of the adhesive material with a separate film. Uninspected areas can be reduced, and waste can be reduced.
  • This optical film defect inspection method and defect inspection apparatus is a defect inspection of a polarizing plate in which an adhesive material with a separate film is attached to one main surface of a polarizing plate main body, and the polarizing plate and a polarization for transmission inspection Applicable to crossed Nicols transmission inspection with filters.
  • the optical film defect inspection apparatus described above may further include an auxiliary polarizing filter for transmission inspection provided between the other main surface of the optical film and the light source or transmission inspection device.
  • the defect inspection step in the optical film defect inspection method described above the light transmitted through the optical film may be received through the polarizing filter and the auxiliary polarizing filter, and the optical film may be inspected based on the received transmitted light. .
  • This optical film defect inspection method and defect inspection apparatus is a retardation inspection for a retardation plate in which an adhesive material with a separate film is attached to one main surface of a retardation plate main body, and includes a polarizing filter for transmission inspection and
  • the present invention can be applied to a crossed Nicols transmission inspection using an auxiliary polarizing filter for transmission inspection.
  • the defect inspection method for an optical film described above further includes a recording step of recording information on the orientation angle measured in the orientation angle measurement step on the optical film, and in the adjustment step, the orientation recorded on the optical film in the recording step.
  • the polarization axis of the polarizing filter may be adjusted based on the corner information.
  • the optical film defect inspection apparatus further includes a recording unit that records the orientation angle information measured by the orientation angle measuring instrument on the optical film, and the orientation angle information recorded on the optical film by the recording unit. Based on the transmitted light received by the transmission inspection device, the defect inspection of the optical film may be performed after adjusting the polarization axis of the polarizing filter based on the above.
  • the defect inspection method and the defect inspection apparatus for the optical film it is possible to perform the alignment process, the light irradiation process, and the defect inspection process on separate lines from the orientation angle measurement process to the recording process.
  • the optical film manufacturing method of the present invention includes the optical film defect inspection method described above, and an adhesive material with a separate film is attached to one main surface of the optical film main body before the orientation angle measurement step and the defect inspection step.
  • an attaching step or after an orientation angle measuring step and before a defect inspection step, including an attaching step of attaching an adhesive material with a separate film to one main surface of the optical film main body. There may be.
  • the optical film manufacturing apparatus of the present invention includes the above-described optical film defect inspection apparatus, and on the upstream side of the orientation angle measuring device and the transmission inspection device, an adhesive material with a separate film is provided on one main surface of the optical film main body. It may be in the form of bonding, or on the downstream side of the orientation angle measuring device and on the upstream side of the transmission inspection device, in which the adhesive material with a separate film is bonded to one main surface of the optical film main body part. Also good.
  • the present invention it is possible to shorten the adjustment time of the polarization axis of the polarizing filter for crossed Nicol transmission inspection required due to the variation in the orientation angle of the separate film.
  • the optical film continuously generated when the polarization axis of the polarizing filter for transmission inspection for switching the roll of the adhesive material with a separate film is adjusted. Uninspected areas can be reduced, and waste can be reduced.
  • FIG. 1 It is a figure which shows the defect inspection apparatus and defect inspection method of a polarizing plate (optical film) which concern on the 1st Embodiment of this invention, and the manufacturing apparatus and manufacturing method of a polarizing plate (optical film). It is a figure which shows the polarizing plate manufactured by the manufacturing apparatus and manufacturing method shown in FIG. It is a figure which shows the orientation angle dispersion
  • FIG. 1 is a diagram showing a polarizing plate (optical film) defect inspection apparatus and defect inspection method, and a polarizing plate (optical film) manufacturing apparatus and manufacturing method according to the first embodiment of the present invention. These are figures which show the polarizing plate manufactured by the manufacturing apparatus and manufacturing method shown in FIG.
  • the manufacturing apparatus 10 bonds the protective film 112 on both sides of the main surface of the polarizer 111 to generate a polarizing plate main body (optical film main body) 110.
  • the manufacturing apparatus 10 bonds the adhesive film 120 with a separate film in which the separate film (release film) 121 is bonded to the adhesive material 122 to the polarizing plate main body 110 to generate the polarizing plate 100.
  • the manufacturing apparatus 10 winds up the produced
  • Examples of the material of the polarizer 111 include polyvinyl alcohol (PVA), and examples of the material of the protective film 112 include triacetylcellulose (TAC).
  • Examples of the material of the separate film 121 include polyethylene terephthalate (PET).
  • the manufacturing apparatus 10 includes a defect inspection apparatus 20.
  • the defect inspection apparatus 20 includes an orientation angle measuring device 21, a light source 22, a transmission inspection device 23, and a transmission inspection polarizing filter 24, and performs a defect inspection of the polarizing plate 100 in-line.
  • the orientation angle measuring device 21 is provided on the one main surface 101 side of the polarizing film 100 on the side of the pressure-sensitive adhesive material with a separate film 120 on the upstream side of the transmission test device 23, and the orientation angle of the separate film 121. Measure.
  • the orientation angle measuring device 21 provides information of the measured orientation angle to the transmission inspection polarizing filter 24.
  • an in-line axis measuring device for example, RE-200 manufactured by Otsuka Electronics Co., Ltd.
  • a light source 22 and a transmission inspection device 23 are provided on the downstream side of the production line from the orientation angle measuring device 21.
  • the light source 22 is provided on the other main surface 102 side of the polarizing plate 100 and irradiates light on the other main surface 102 side of the polarizing plate 100.
  • the transmission inspection device 23 is provided on the one main surface 101 side of the polarizing plate 100, and receives light transmitted through the polarizing plate 100 via the transmission inspection polarizing filter 24.
  • the transmission inspection polarizing filter 24 is provided between one main surface 101 of the polarizing plate 100 and the transmission inspection device 23.
  • the transmission inspection polarizing filter 24 has a polarization axis adjusting mechanism, and based on the orientation angle information of the separate film 121 from the orientation angle measuring device 21, the polarization filter 24 with respect to the polarization axis of the polarizing plate main body 110 is provided.
  • the polarization axis (for example, the rotation angle of the polarization filter 24) is adjusted to form a crossed Nicols state.
  • the polarization axis adjustment mechanism stores the adjustment amount of the polarization axis of the polarization filter 24 in advance as a lookup table in association with the orientation angle of the separate film 121, and the orientation of the separated film 121 measured based on this lookup table.
  • the polarization axis of the polarization filter 24 corresponding to the angle is automatically determined.
  • the transmission inspection device 23 After adjusting the polarization axis of the polarizing filter 24, the transmission inspection device 23 performs a defect inspection of the polarizing plate 100 by a crossed Nicols transmission inspection based on the received transmitted light.
  • the crossed Nicols transmission inspection refers to a transmitted light image in a state (crossed Nicols) in which the absorption axes of two polarizers (in the present embodiment, the polarizing plate 100 and the polarizing filter 24) are substantially orthogonal to each other (for example, This is an inspection for detecting defects (bright spots) that are observed using a line sensor) and light is lost.
  • the adhesive material 120 with a separate film is bonded to one main surface of the polarizing plate main body 110 on the upstream side of the orientation angle measuring device 21 and the transmission inspection device 23.
  • the adhesive material 120 with a separate film is stuck on one main surface of the polarizing plate main body 110 (sticking step).
  • the orientation angle of the separate film 121 is measured by the orientation angle measuring device 21 (orientation angle measuring step).
  • the polarization axis of the polarization filter 24 with respect to the polarization axis of the polarizing plate main body 110 is adjusted (adjusted) based on the measured orientation angle information of the separation film 121 by the polarization axis adjustment mechanism in the transmission inspection polarization filter 24 (adjustment). Process).
  • the light source 22 irradiates light to the polarizing plate 100 (light irradiation step).
  • the transmission inspection device 23 receives the light transmitted through the polarizing plate 100 via the polarizing filter 24, and performs a defect inspection of the polarizing plate 100 based on the received transmitted light (defect inspection step).
  • the pressure-sensitive adhesive material 120 with a separate film is provided in a roll form with a length of, for example, 1000 m or more, while the polarizing plate 100 is continuously generated with a length exceeding the length of the pressure-sensitive adhesive material 120 with a separate film, for example,
  • the adhesive material 120 with a film is continuously attached to one polarizing plate 100 while connecting rolls at a joint 123.
  • the separate film 121 in the pressure-sensitive adhesive material with a separate film 120 as shown in FIG. 3, for example, a wide stretched film obtained by stretching a raw material film is aligned with the width of the polarizing plate 100 to be pasted.
  • a material cut into a plurality of A, B, and C is used.
  • the orientation angle E varies in the width direction due to bowing D, and therefore rolls A, B, and C of the adhesive film 120 with a separate film to be attached Have different orientation angles.
  • the transmission-inspection polarizing filter 24 is used for each roll of the separate film-attached adhesive material 120 to be used. It is necessary to adjust the polarization axis.
  • a polarizing plate when performing a crossed Nicols transmission inspection in-line, a polarizing plate is continuously generated even when the polarization axis of a polarizing filter for transmission inspection is adjusted in order to switch the roll of an adhesive material with a separate film. . For this reason, the region of the polarizing plate obtained during this adjustment becomes an uninspected region, which cannot be used as a product and is wasted. For example, if the time required for adjusting the polarization axis of a polarizing filter for transmission inspection is about 1 minute and the line speed is about 10 to 30 m / min, a polarizing plate of about 10 to 30 m in one roll switching of an adhesive with a separate film. This area becomes uninspected and is wasted.
  • the orientation angle of the separate film 121 is measured in advance by the orientation angle measuring device 21.
  • the polarization axis of the polarizing filter 24 is automatically adjusted based on the measured orientation angle. Therefore, it is possible to shorten the adjustment time of the polarization axis of the polarizing filter 24 for crossed Nicol method transmission inspection required due to the variation in the orientation angle of the separate film 121.
  • FIG. 4 is a diagram showing a polarizing plate (optical film) defect inspection apparatus and defect inspection method, and a polarizing plate (optical film) manufacturing apparatus and manufacturing method according to the second embodiment of the present invention.
  • the manufacturing apparatus 10 ⁇ / b> A of the second embodiment shown in FIG. 4 has a separate film on one main surface of the polarizing plate main body 110 on the downstream side of the orientation angle measuring device 21 and on the upstream side of the transmission inspection device 23. It differs from 1st Embodiment by the point which sticks the adhesive material 120 with.
  • Other configurations of the manufacturing apparatus 10A of the second embodiment are the same as those of the manufacturing apparatus 10 of the first embodiment.
  • the sticking step of sticking the adhesive material 120 with a separate film to one main surface of the polarizing plate main body 110 after the orientation angle measurement step and before the defect inspection step is different from the first embodiment in that
  • the defect inspection method and defect inspection apparatus for the polarizing plate and the manufacturing method and manufacturing apparatus for the polarizing plate of the second embodiment the defect inspection method and defect inspection apparatus for the polarizing plate of the first embodiment, and the polarizing plate Advantages similar to those of the manufacturing method and the manufacturing apparatus can be obtained.
  • FIG. 5 is a view showing a retardation plate (optical film) defect inspection apparatus and defect inspection method, and a retardation plate (optical film) manufacturing apparatus and manufacturing method according to the third embodiment of the present invention.
  • FIG. 6 is a diagram showing a retardation plate manufactured by the manufacturing apparatus and the manufacturing method shown in FIG.
  • the manufacturing apparatus 10B shown in FIG. 5 is used to manufacture the phase difference plate 100B shown in FIG.
  • the manufacturing apparatus 10B produces
  • the manufacturing apparatus 10 winds up the generated retardation plate 100 ⁇ / b> B with the raw fabric winder 11.
  • the material of the retardation plate include TAC, polycarbonate, PET, COP (cycloolefin polymer) and the like.
  • the manufacturing apparatus 10B includes a defect inspection apparatus 20B.
  • the defect inspection apparatus 20B is different from the first embodiment in that the defect inspection apparatus 20 further includes a transmission inspection auxiliary polarizing filter 25 and a phase difference compensation filter 26.
  • the auxiliary polarizing filter 25 for transmission inspection is provided between the other main surface 102 of the phase difference plate 100B and the light source 22, and the phase difference compensation filter 26 is transmitted through the other main surface 102 of the phase difference plate 100B. It is provided between the auxiliary polarizing filter for inspection 25.
  • the transmission inspection device 23 receives the light transmitted through the phase difference plate 100B via the transmission inspection auxiliary polarizing filter 25, the phase difference compensation filter 26, and the transmission inspection polarizing filter 24.
  • the polarization axis adjustment mechanism in the transmission inspection polarizing filter 24 is based on the information on the orientation angle of the separate film 121 from the orientation angle measuring device 21 and the polarization axis of the polarization filter 24 relative to the polarization axis of the transmission inspection auxiliary polarizing filter 25 ( For example, the rotation angle of the polarizing filter 24 is adjusted to form a crossed Nicol state. That is, in this embodiment, the crossed Nicols state is formed by two polarizers (transmission inspection auxiliary polarizing filter 25 and polarizing filter 24).
  • the adhesive 120 with a separate film is bonded to one main surface of the retardation plate main body 110B on the upstream side of the orientation angle measuring device 21 and the transmission inspection device 23.
  • the polarization axis of the polarization filter 24 is adjusted with respect to the polarization axis of the auxiliary polarization filter 25 for transmission inspection based on the measured orientation angle information of the separation film 121 by the polarization axis adjustment mechanism of the polarization filter 24 for transmission inspection. (Adjustment process).
  • the light source 22 irradiates light to the phase difference plate 100B (light irradiation step).
  • the transmission inspection device 23 receives the light transmitted through the phase difference plate 100B via the auxiliary polarizing filter 25, the phase difference compensation filter 26, and the polarization filter 24, and the phase difference plate 100B based on the received transmitted light.
  • the defect inspection is performed (defect inspection process).
  • the orientation angle of the separate film 121 is measured in advance by the orientation angle measuring device 21 and measured. Since the polarization axis of the polarizing filter 24 is automatically adjusted based on the orientation angle, the adjustment of the polarization axis of the polarizing filter 24 for crossed Nicol transmission inspection required due to the variation in the orientation angle of the separate film 121 is required. Time can be shortened.
  • FIG. 7 is a diagram showing a retardation plate (optical film) defect inspection apparatus and defect inspection method, and a retardation plate (optical film) manufacturing apparatus and manufacturing method according to the fourth embodiment of the present invention.
  • the manufacturing apparatus 10C of the fourth embodiment shown in FIG. 7 is separated on one main surface of the retardation plate main body 110B on the downstream side of the orientation angle measuring device 21 and the upstream side of the transmission inspection device 23.
  • the third embodiment is different from the third embodiment in that the adhesive material with film 120 is bonded.
  • Other configurations of the manufacturing apparatus 10C of the fourth embodiment are the same as those of the manufacturing apparatus 10B of the third embodiment.
  • the adhesive film-attached adhesive material 120 is attached to one main surface of the retardation plate main body 110B after the orientation angle measurement process and before the defect inspection process. It differs from the third embodiment in that it includes a process.
  • the retardation plate defect inspection method and defect inspection apparatus of the fourth embodiment In the retardation plate defect inspection method and defect inspection apparatus, and retardation plate manufacturing method and manufacturing apparatus of the fourth embodiment, the retardation plate defect inspection method and defect inspection apparatus of the third embodiment, and Advantages similar to those of the retardation plate manufacturing method and manufacturing apparatus can be obtained.
  • the present invention is not limited to the first to fourth embodiments described above (hereinafter, these may be collectively referred to as this embodiment), and various modifications can be made.
  • the light source 22 is provided on the other main surface 102 side of the polarizing plate 100 or the retardation plate 100B, and the transmission inspection device 23 is provided on the one main surface 101 side of the polarizing plate 100 or the retardation plate 100B.
  • the form provided is illustrated.
  • the light source 22 may be provided on one main surface 101 side of the polarizing plate 100 or the retardation plate 100B
  • the transmission inspection device 23 may be provided on the other main surface 102 side of the polarizing plate 100 or the retardation plate 100B. (See, for example, FIG.
  • the transmission inspection polarizing filter 24 may be provided between the one main surface 101 of the polarizing plate 100 and the light source 22.
  • the transmission inspection polarizing filter 24 may be provided between the one main surface 101 of the phase difference plate 100B and the light source 22, and the transmission inspection auxiliary polarizing filter 25 and The phase difference compensation filter 26 may be provided between the other main surface 102 of the phase difference plate 100 ⁇ / b> B and the transmission inspection device 23.
  • information on the orientation angle measured by the orientation angle measuring device 21 is directly supplied to the polarizing filter 24, but information on the orientation angle of the separate film 121 measured by the orientation angle measuring device 21 is recorded in the recording unit 27.
  • the polarizing axis adjustment mechanism in the polarizing filter 24 causes the polarizing plate 100 or Information recorded on the phase difference plate 100B may be read, and the polarization axis of the optical filter may be adjusted based on this information.
  • the polarization axis of the polarizing filter 24 is adjusted (for example, see FIG. 9: Modification of the First Embodiment).
  • Information to be recorded on the polarizing plate 100 or the retardation plate 100B may be an identification code (one-dimensional barcode, two-dimensional code, QR code (registered trademark), etc.), and the information on the polarizing plate 100 or the retardation plate 100B. May be recorded at the end in the width direction.
  • a transmission inspection device As the orientation angle measuring device 21, a transmission inspection device, a transmission inspection polarizing filter, a phase difference compensation filter, and a light source similar to those described above are combined, and the second embodiment (FIG. 4), the third embodiment (FIG. 5), and In the case of the fourth embodiment (FIG. 7), a transmission inspection auxiliary polarizing filter similar to the above may be used in combination.
  • a transmission inspection device is disposed at a position where the orientation angle measuring device (21) is disposed, and a transmission inspection polarizing filter is disposed between the transmission inspection device and the adhesive material with a separate film (120).
  • a light source is arranged on the opposite side to the transmission tester side of the attached adhesive material (120), and a phase difference compensation filter is sequentially provided between the adhesive material with a separate film (120) and the adhesive material with a separate film (120) side.
  • an auxiliary polarizing filter for transmission inspection For example, change the direction of the polarization axis of the polarization filter for transmission inspection, the slow axis of the phase difference compensation filter, and the polarization axis of the auxiliary polarization filter for optical inspection so that light from the light source does not reach the transmission inspection device.
  • the orientation angle of the separate film can be determined from the orientation of
  • the length of the polarizing plate 100 or the phase difference plate 100B is 10 times or less than the length of the pressure-sensitive adhesive material 120 with a separate film.
  • the length of the polarizing plate main body 110 or the retardation plate main body 110B (optical film main body) that is continuously generated is 10 times or less than the length of the adhesive material 120 with a separate film.
  • the length of the polarizing plate 100 or the retardation plate 100B (in other words, the length of the polarizing plate main body 110 or the retardation plate main body 110B) is 1000 m or more and 20000 m or less, and an adhesive with a separate film
  • the length of 120 is often 500 m or more and 5000 m or less.
  • the length of the polarizing plate 100 or the retardation plate 100B (in other words, the length of the polarizing plate main body 110 or the retardation plate main body 110B) is 3 with respect to the length of the pressure-sensitive adhesive material 120 with a separate film.
  • the pressure-sensitive adhesive material 120 with a separate film with respect to one polarizing plate 100 or retardation plate 100B (in other words, the polarizing plate main body 110 or the retardation plate main body 110B).
  • the frequency of linking each other increases.
  • the length of the polarizing plate 100 or the retardation plate 100B (in other words, the length of the polarizing plate main body 110 or the retardation plate main body 110B) and the length of the adhesive 120 with a separate film are greatly different.
  • the method and apparatus of the present invention can be suitably applied when the frequency of joining the pressure-sensitive adhesive material with separate film 120 is increased, and exhibits the above-described remarkable effects.
  • SYMBOLS 10,10A Manufacturing apparatus of polarizing plate (optical film), 10B, 10C ... Manufacturing apparatus of phase difference plate (optical film), 11, 12 ... Raw material winding device, 20 ... Defect inspection of polarizing plate (optical film) Device, 20B ... retardation plate (optical film) defect inspection device, 21 ... orientation angle measuring device, 22 ... light source, 23 ... transmission inspection device, 24 ... transmission inspection polarizing filter, 25 ... transmission inspection auxiliary polarizing filter, DESCRIPTION OF SYMBOLS 26 ... Retardation compensation filter, 27 ... Recording part, 100 ... Polarizing plate (optical film), 100B ... Retardation plate (optical film), 101 ...

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Abstract

Selon un mode de réalisation de la présente invention, le procédé d'inspection de défauts utilise un appareil d'inspection de défauts 20 qui comprend une source de lumière 22, une unité d'inspection de transmission 23 et un filtre de polarisation 24 permettant l'inspection de transmission afin d'inspecter les défauts d'un film optique, ledit film optique étant formé d'un matériau adhésif stratifié ayant un film séparateur. L'appareil d'inspection de défauts 20 comprend en outre une unité de mesure d'angle d'orientation 21. Le procédé d'inspection de défauts comprend les étapes suivantes : la mesure de l'angle d'orientation d'un film séparateur 121 à l'aide de l'unité de mesure d'angle d'orientation 21 ; l'ajustement de l'axe de polarisation du filtre de polarisation 24 sur la base de l'angle d'orientation mesuré ; l'irradiation du film optique par de la lumière provenant de la source de lumière 22 ; l'inspection de défauts pour recevoir, par l'unité d'inspection de transmission 23, la lumière transmise à travers le film optique par l'intermédiaire du filtre de polarisation 24, afin d'inspecter les défauts du film optique sur la base de la lumière transmise reçue.
PCT/JP2016/052020 2015-02-03 2016-01-25 Procédé et appareil d'inspection de défauts pour film optique, procédé et appareil de fabrication de film optique WO2016125616A1 (fr)

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JP2015-019450 2015-02-03
JP2015019450A JP6437329B2 (ja) 2015-02-03 2015-02-03 光学フィルムの欠陥検査方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106290384A (zh) * 2016-10-21 2017-01-04 江苏理工学院 无刷直流电机控制线路板在线检测识别方法
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CN106290384B (zh) * 2016-10-21 2018-11-23 江苏理工学院 无刷直流电机控制线路板在线检测识别方法
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