TWI532669B - A manufacturing system for an optical film roll, and a method for manufacturing an optical film roll - Google Patents

Description

Optical film roll manufacturing system and optical film roll manufacturing method Technical field

The present invention relates to an optical film for slitting a long sheet-shaped optical film blank along a longitudinal direction thereof, and winding the long sheet-shaped optical film into a roll. A manufacturing system and a manufacturing method for producing an optical film roll.

Background technique

In a stereoscopic image display device such as a 3D-LCD TV that displays a stereoscopic image, a right-eye image display region (first phase difference region) and a left-eye image in which phase differences are different from each other are alternately arranged in the width direction. A pattern retardation film such as a display region (second phase difference region), a pattern film in which a light-transmitting region and a light-shielding region are disposed, and the like. Patterns are formed in advance on these films.

In the production of an optical film roll, generally, a wide optical film blank is slit at a predetermined width, and the slit optical film is wound into a roll. However, in the case where the optical film having a pattern is formed in advance as described above, not only the slit width is required to be appropriate, but also the slitting is performed with high precision at an appropriate position with respect to the pattern.

Patent Document 1 discloses a roll formed by winding a pattern retardation film.

Advanced technical literature Patent literature

Patent Document 1: Japanese Special Open 2012-32445

Summary of invention

However, in Patent Document 1, a method of performing slitting with high precision at an appropriate position with respect to the pattern is not specifically described.

The present invention has been made in view of the above-described problems, and an object of the invention is to provide a manufacturing system of an optical film roll which can cut a long strip-shaped optical film material having a pattern at a suitable position with respect to a pattern. And manufacturing methods.

In order to solve the above problems, intensive studies have been conducted, and as a result, the following invention has been completed. That is, the present invention is a system for producing an optical film roll, which slits the optical film material while conveying a long sheet-shaped optical film material having a pattern, and obtains the obtained long film-shaped optical film roll. The optical film roll is produced in a roll shape, and has an image pickup unit that images the image of the transported optical film blank, and a calibration unit that is based on an image pickup result obtained by the image pickup unit. The position of the optical film blank in the width direction is adjusted.

According to this configuration, since the position of the width direction of the optical film blank is adjusted based on the position in the width direction of the pattern of the optical film blank, it is possible to The optical film blank is slit with high precision for a position where the pattern is appropriate.

Examples of the pattern include a line (reference line) parallel to the longitudinal direction of the optical film blank or a line (reference line) parallel to the transport direction (longitudinal direction) of the long sheet-shaped optical film material to be transported.

In the present specification, the "width direction" means a direction orthogonal to the transport direction (longitudinal direction) of the long sheet-shaped optical film material to be transported.

According to still another aspect of the invention, there is provided a system for producing an optical film roll which cuts the optical film material while conveying a long sheet-shaped optical film material having a pattern, and obtains a long strip shape. The optical film is wound into a roll to produce an optical film roll, and has a discharge portion that discharges the optical film blank from the optical film blank roll, and a transport portion that discharges the optical film blank from the discharge portion. The imaging unit transmits an image of the optical film blank conveyed by the transport unit, and the calibration unit adjusts a position of the optical film blank in the width direction based on an imaging result obtained by the imaging unit. a slit portion which is disposed on a downstream side of the image pickup portion, and continuously cuts the optical film blank conveyed by the transport portion in a longitudinal direction to obtain the long sheet-shaped optical film; The optical film obtained by the slitting portion is wound into a roll shape.

According to this structure, due to the width of the pattern based on the optical film blank The position of the optical film material in the width direction is adjusted in the direction position, so that the optical film material can be slit with high precision at an appropriate position with respect to the pattern.

Further, in an embodiment of the invention, the image pickup unit images the image in a state in which the conveyed optical film material is in close contact with a convex curved surface formed in an arc shape along a longitudinal direction of the optical film material.

According to this configuration, variations in the conveyance of the optical film blank can be eliminated, and measurement deviation in the width direction of the measurement pattern can be reduced. Therefore, the optical film material can be slit with high precision at a position more appropriate for the pattern.

Further, in an embodiment of the invention, the optical film roll manufacturing system further includes an illuminating unit that illuminates an imaging region including the pattern of the optical film blank imaged by the imaging unit.

According to this configuration, since the boundary (edge) of the pattern is conspicuous, the image captured is sharp, and the measurement error of the position in the width direction of the pattern can be reduced. It is preferable that the boundary (edge) of the pattern is more conspicuous when the pattern is irradiated with reflected light than the image irradiated by the image pickup unit.

Further, in an embodiment of the invention, the calibration unit includes a release position adjustment unit that adjusts a position of the release unit in the width direction.

Further, in one embodiment of the invention, the calibration unit includes a sheet aligning unit that is a part of the transport unit and adjusts a position in a width direction of the optical film blank conveyed by the transport unit. .

Further, in an embodiment of the invention, the calibration unit includes a release position adjustment unit and a sheet aligning unit, wherein the release position adjustment unit adjusts a position in a width direction of the release unit, and the sheet aligning unit is the conveyance a part of the portion and adjusting the position in the width direction of the optical film blank conveyed by the conveying portion, The first imaging unit includes a first imaging unit (A) disposed between the emitting unit and the sheet aligning unit, and a first imaging unit disposed between the sheet aligning unit and the slitting unit ( B), The release position adjustment unit adjusts the position in the width direction of the release unit based on the imaging result obtained by the imaging by the first imaging unit (A). The sheet aligning unit adjusts the position in the width direction of the optical film blank conveyed by the transport unit based on an imaging result obtained by the first imaging unit (B).

According to this configuration, the position in the width direction of the discharge portion can be adjusted by the discharge position adjusting portion, and the position in the width direction of the optical film blank during conveyance can be adjusted by the sheet aligning portion. The adjustment of the release position adjustment unit is larger than the adjustment of the sheet calibration unit (the movement distance is large), and the calibration of the sheet calibration unit is suitable for the smaller calibration. Thereby, the optical film blank can be slit with high precision at an appropriate position with respect to the pattern.

The sheet aligning portion has, for example, at least two rollers and a moving mechanism that freely moves the roller in the longitudinal direction thereof. The two rolls and the optical film blank were arranged such that the longitudinal direction of the two rolls was parallel to the width direction of the optical film blank, and the optical film blank was wound on the two rolls. The optical film blank is conveyed while moving the two rollers in the width direction by the moving mechanism, thereby enabling optical The position of the film blank in the width direction is finely adjusted.

Further, in an embodiment of the invention, the optical film roll manufacturing system further includes a second image pickup unit disposed at a position downstream of the slit portion and facing the longitudinal direction of the transported optical film The end surface, that is, the tangential line, performs imaging; the display unit displays an image captured by the second imaging unit.

According to this configuration, by outputting (displaying) the slit position captured by the second imaging unit on the display unit such as a monitor, the operator can easily confirm whether or not the slitting is performed at an appropriate position with respect to the pattern by visual observation.

Further, in an embodiment of the invention, the optical film is a pattern retardation film in which a first phase difference region and a second phase difference region having different phase differences are alternately arranged in the width direction.

The pattern retardation film is, for example, a pattern retardation film (a retardation film for a stereoscopic image display device) provided in a device for displaying a stereoscopic image by displaying a right-eye image and a left-eye image. Wait.

Further, in one embodiment of the invention, the optical film is a pattern retardation film-integrated polarizing plate having a laminated pattern retardation film and a polarizing film having an absorption axis parallel to the longitudinal direction, and the pattern retardation film has a width along the width The first phase difference region and the second phase difference region in which the phase differences are different from each other are alternately arranged in the direction.

Further, in an embodiment of the invention, the optical film is a pattern film in which a light transmitting region and a light blocking region are disposed.

Further, as the cutting mechanism of the slitting portion, for example, Knife, laser. Further, the cutting mechanism of the slit portion is provided, for example, two or more in the width direction of the optical film blank.

According to another aspect of the invention, there is provided a method for producing an optical film roll, wherein the optical film material is slit while conveying a long sheet-shaped optical film material having a pattern, and the obtained long sheet is obtained. The optical film is wound into a roll to produce an optical film roll, comprising: an image capturing step of capturing the pattern of the transported optical film blank; and a calibration step based on the image pickup result obtained in the image capturing step The position of the optical film blank in the width direction is adjusted.

According to another aspect of the invention, there is provided a method for producing an optical film roll, wherein the optical film material is slit while conveying a long sheet-shaped optical film material having a pattern, and the obtained long sheet is obtained. The optical film is wound into a roll to produce an optical film roll, and includes: a releasing step of discharging the optical film blank from the optical film blank roll; and a conveying step of moving the optical film blank discharged in the releasing step a downstream conveying; an imaging step of imaging the pattern of the optical film blank conveyed by the transporting step; and a calibration step of adjusting a width direction position of the optical film blank based on an imaging result obtained in the imaging step; a slitting step The optical film blank conveyed by the transporting step is continuously cut along the longitudinal direction to obtain the long sheet-shaped optical film; and the winding step of the optical film roll obtained in the slitting step Winding into a roll.

1, 2, 3‧‧‧ Optical film roll manufacturing system

10‧‧‧Release Department

20‧‧‧Flake Calibration Department

21‧‧‧First calibration roller

22‧‧‧Second calibration roller

23‧‧‧Linear motion mechanism

30‧‧‧cutting

41, 42‧ ‧ first camera department

43, 44‧‧‧ Second Camera Department

50‧‧‧Transportation Department

51, 52, 53, 54, R2, R3, R4‧‧ ‧ rolls

60‧‧‧ Release position adjustment unit

70‧‧‧Winding Department

80‧‧‧Long sheet of optical film blank

81, 82, 83‧‧‧ long strips of optical film

90‧‧‧Information processing device

91‧‧‧Decision Department/Location Information Acquisition Department

92‧‧‧ Computing Department

93‧‧‧Control Department

95‧‧‧Monitor

411, 421‧‧‧ Ring Lighting

431, 441‧‧‧ rod-shaped lighting

L1‧‧‧ baseline

C1‧‧‧ tangent

R1‧‧‧Optical film blank roll

Fig. 1 is a schematic view showing a manufacturing system of an optical film roll according to a first embodiment.

Fig. 2 is a view showing an example of a reference line in the first embodiment;

FIG. 3 is a view illustrating a field of view of the first imaging unit.

4 is a view illustrating a field of view of a second imaging unit.

Fig. 5 is a schematic view showing a manufacturing system of an optical film roll according to a second embodiment;

Fig. 6 is a schematic view showing a manufacturing system of an optical film roll according to a third embodiment;

Fig. 7 is a view showing evaluation results of Examples 1 and 2.

Detailed description of the preferred embodiment

(Embodiment 1)

The structure of the optical film roll manufacturing system 1 of the first embodiment will be described with reference to Fig. 1 . FIG. 2 shows an example of a long sheet-shaped optical film blank 80.

The long sheet-shaped optical film material of the first embodiment is an optical film material (a stereoscopic image display device) in which a pattern retardation film for a stereoscopic image display device and a polarizing film having an absorption axis parallel to the longitudinal direction are laminated. In the pattern retardation film for a stereoscopic image display device, the right-eye image display region in which the phase differences are different from each other is alternately arranged in the width direction (the phase difference is +λ). /4, first phase difference area) and left eye image display area (phase difference is -λ/4, second phase difference area) area). The film width of the optical film blank is, for example, 1200 mm or more and 2400 mm or less.

In the present embodiment, a reference line (a boundary of a pattern) L1 parallel to the longitudinal direction of the long sheet-shaped optical film blank 80 is used as a detection line. That is, the position in the width direction of the pattern is measured based on the detection line. The baseline can be one or more than two. Further, the type of the line as the reference line is not particularly limited, and examples thereof include a solid line and a broken line, but a solid line is preferable.

The discharge unit 10 discharges the long sheet-shaped optical film blank 80 from the optical film blank roll R1. The discharge unit 10 has a rotation mechanism that rotates the optical film blank roll R1. The rotating mechanism can rotate freely or can be coupled to the motor to drive the rotation.

The transport unit 50 transports the optical film blank 80 discharged from the discharge unit 10 downstream. The transport unit 50 can be configured to be transported by sandwiching the optical film blank 80 by a nip roll (not shown), and can be slit-shaped optically obtained by slitting the downstream portion of the winding portion 70, which will be described later. The film is wound around the rolls R2, R3, and R4 to be transported, and may be transported by the above two.

The first imaging unit 41 captures the pattern of the optical film blank 80 transported by the transport unit 50. The first imaging unit 41 is configured by, for example, an area array camera. As shown in FIG. 3, the first imaging unit 41 captures a pattern (reference line L1) in its field of view.

The first imaging unit 41 captures the image (reference line L1) in a state in which the transported optical film blank 80 is in close contact with the convex curved surface formed in an arc shape along the longitudinal direction of the optical film blank 80. As the convex curved surface, a roller 51 constituting a part of the conveying portion 50 can be used.

In the present embodiment, the first imaging unit 41 is included as a pair. The illumination unit that illuminates the imaging region of the pattern (reference line L1) of the imaged optical film blank 80 is used, and the ring illumination 411 is used. In the present embodiment, as shown in FIG. 1, the first imaging unit 41 is disposed on the same side as the annular illumination 411 with respect to the optical film blank 80, and is disposed at a position away from the optical film blank 80 from the annular illumination 411. . Further, between the first imaging unit 41 and the optical film blank 80, a region in which one of the reference lines is formed is provided as a cross nicol relationship, and the other region is parallel to Nicole (parallel). Nicol) the relationship of circularly polarized plates.

The image captured by the first imaging unit 41 is subjected to image analysis by the information processing device 90. The determination unit (position information acquisition unit) 91 of the information processing device 90 detects the reference line of the image obtained by the image analysis. As shown in FIG. 3, the detected reference line is used as a detection line. It is determined whether the detection line is in a predetermined standard position within the field of view of the camera (the width direction position where the reference line should exist) (or is disposed within a predetermined range). The determination unit 91 measures, for example, the vertical distance from the right end of the viewing range (imaging region) to the reference line (detection line), and determines whether or not the measured value is within a predetermined value. When the determination unit 91 determines that the position in the width direction of the reference line is at a predetermined position (a position in the width direction where the reference line should be present) (or is disposed within a predetermined range), the determination unit 91 may perform no instruction, for example, or may The monitor 95 of the display unit outputs an image.

On the other hand, when the determination unit 91 determines that the reference line (detection line) is not located at a predetermined standard position (a position in the width direction where the reference line should exist) (or is not disposed within a predetermined range), the calculation unit 92 The moving direction and the amount of movement of the emitting unit 10 are obtained. The calculation unit 92 measures, for example, the reference line from The moving direction (the direction opposite to the offset direction) and the amount of movement of the emitting portion 10 are obtained by the offset direction and the offset amount of the standard position. The amount of movement can be the same as the offset, and can be larger than the offset or smaller than the offset. Then, the control unit 93 instructs the above-described release position adjustment unit 60 to the above-described obtained movement direction and movement amount.

The release position adjustment unit 60 adjusts the position in the width direction of the discharge unit 10 based on the imaging result (image) obtained by the imaging by the first imaging unit 41. The release position adjustment unit 60 has a movement mechanism for moving the discharge unit 10 in the width direction thereof, and the movement direction adjusts the position in the width direction of the discharge unit 10 based on the movement direction and the amount of movement transmitted from the control unit 93. As the moving mechanism, for example, a linear motion mechanism can be cited.

The slitting portion 30 is disposed on the downstream side of the first image capturing portion 41, and the optical film blank 80 conveyed by the transporting portion 50 is continuously cut in the longitudinal direction to obtain the elongated sheet-shaped optical films 81, 82, and 83. The cutting mechanism of the slitting portion 30 is, for example, a cutter or a laser. However, from the viewpoint of the quality of the cut surface, a cutter is preferable, and it is more preferable to face the cut object with two cutters. The cut is cut. In the present embodiment, the cutting mechanism of the slitting portion 30 is provided in three in the width direction of the optical film blank 80, but it may be two or four or more.

The winding portion 70 winds the long sheet-shaped optical films 81, 82, and 83 cut by the slit portion 30 around the rolls R2, R3, and R4, respectively. The winding unit 70 includes a motor (not shown) and a rotating mechanism, and rotates the rolls R2, R3, and R4 in synchronization with each other at the same speed, and winds the long sheet-shaped optical films 81, 82, and 83, respectively.

The second imaging units 43 and 44 are disposed on the downstream side of the slitting unit 30. The end surface of the optical film for image conveyance that is cut in the longitudinal direction is a slit line C1. In the present embodiment, the second imaging units 43 and 44 are constituted by a line camera.

The second imaging units 43 and 44 image the slit lines (the cut surfaces after slitting) in a state in which the transported optical films 81 and 82 are in close contact with the convex curved surfaces formed in an arc shape along the longitudinal direction of the optical films 81 and 82. ). As the convex curved surface, rollers 53 and 54 constituting a part of the conveying portion 50 are used.

In the present embodiment, the rod-shaped illuminations 431 and 441 are used as the illumination unit that illuminates the imaging region including the slit line C1 imaged by the second imaging units 43 and 44. As shown in FIG. 1, the second imaging units 43 and 44 are disposed on the same side as the rod-shaped illuminations 431 and 441 with respect to the optical films 81 and 82, and are disposed away from the optical film 81 by the rod-shaped illuminations 431 and 441. , the location of 82.

The images captured by the second imaging units 43, 44 can be transmitted to the monitor and displayed. By causing the monitor 95 to output (display) the slit position captured by the second imaging units 43, 44, the operator can easily visually confirm the slit line C1. FIG. 4 shows an example of an image of the slit line C1 imaged by the second imaging unit.

(Embodiment 2)

The structure of the manufacturing system 2 for the optical film roll according to the second embodiment will be described with reference to Fig. 5 . The configuration different from the first embodiment will be described, and the description of the same configuration will be omitted.

The transport unit 50 has a sheet-like aligning unit 20 that adjusts the position of the optical film blank 80 in the width direction based on the image obtained by the first imaging unit 42 between the emitting unit 10 and the first imaging unit 42 . The first imaging unit 42 has the same configuration as the first imaging unit 41 of the first embodiment. The information processing device 90 has the same configuration, and the moving direction and movement are obtained in the same manner as in the first embodiment. The amount is commanded to the sheet aligning unit 20, and the position of the optical film blank 80 in the width direction is adjusted by the sheet aligning unit 20.

The sheet aligning portion 20 of the second embodiment has a first aligning roller 21, a second aligning roller 22, and a linear motion mechanism 23 that freely moves the first and second aligning rollers 21, 22 in the longitudinal direction thereof. The first and second registration rollers 21, 22 and the optical film blank 80 are disposed such that the longitudinal directions of the first and second registration rollers 21, 22 are parallel to the width direction of the optical film blank 80. As shown in FIG. 5, the optical film blank 80 is wound with respect to the first alignment roller 21 at an angle of 90° from the lower side to the right side, and then the optical film blank 80 is angled downward with respect to the second alignment at an angle of 90°. The roller 22 is wound. While the optical film blank 80 is being transported by the transport unit 50, the first and second alignment rollers 21 and 22 are moved in the film width direction by the linear movement mechanism 23, and the position of the optical film blank 80 in the width direction is finely adjusted.

(Embodiment 3)

The structure of the optical film roll manufacturing system 3 of the third embodiment will be described with reference to Fig. 6 . The third embodiment is configured to include two imaging units of the first imaging unit (A) 41 of the first embodiment and the first imaging unit (B) 42 of the second embodiment.

The release position adjustment unit 60 adjusts the position in the width direction of the discharge unit 10 based on the imaging result (image) imaged by the first imaging unit (A) 41.

The sheet aligning unit 20 adjusts the position in the width direction of the optical film blank 80 based on the imaging result (image) imaged by the first imaging unit (B) 42.

<Manufacturing method>

The optical film roll is produced by slitting the optical film blank while conveying a long sheet-shaped optical film blank having a pattern. A method for producing an optical film roll by winding a strip-shaped optical film into a roll shape, comprising: an image capturing step of image capturing the aforementioned pattern of the optical film blank conveyed; and a calibration step based on the image capturing step The obtained imaging result was used to adjust the position of the optical film blank in the width direction.

Further, in the method for producing an optical film roll, the optical film material is slit while conveying a long sheet-shaped optical film material having a pattern, and the obtained long sheet-shaped optical film is wound into a roll shape. A method for producing an optical film roll, comprising: a releasing step of discharging the optical film blank from an optical film blank roll; and a conveying step of conveying the optical film blank discharged in the discharging step downstream; an image capturing step, an image capturing The pattern of the optical film blank conveyed by the transporting step; the aligning step of adjusting the width direction position of the optical film blank based on the image capturing result obtained in the image capturing step; and the slitting step of the optical film transported by the transporting step The billet is continuously cut along the longitudinal direction to obtain the long sheet-shaped optical film. In the winding step, the optical film obtained in the slitting step is wound into a roll shape.

(Other embodiments of optical film)

In the above embodiment, the optical film blank is described as an example of the pattern retardation film-integrated polarizing plate. However, the optical film blank is not particularly limited thereto. For example, the pattern film of the optical film blank may be alternately arranged in the width direction. A patterned film of a light region and a light-shielding region.

<Example>

The first embodiment is the configuration of the first embodiment described above, and the second embodiment is the configuration of the third embodiment. Comparative Example 1 is used instead of the first imaging unit 41 of Embodiment 1. The same as in the first embodiment except that the line sensor is used. In the evaluation, the film transport speed was changed, and only the amount of 600 m was cut, and the distance from the slit end face to the reference line (edge) was measured at intervals of 1 m in the longitudinal direction of the slit optical film, and the measurement distance was determined. Deviation R. The results are shown in Fig. 7. In Fig. 7, the horizontal axis represents the conveying speed, and the vertical axis represents the deviation.

In the first embodiment and the second embodiment, the slitting can be performed with high precision at a position more appropriate than that of the comparative example 1. In the case of the line sensor, when there are a plurality of lines in the field of view, it is unclear which line is detected, and the position of the width direction of the reference line cannot be appropriately measured. Therefore, the position of the slit can be estimated. The deviation becomes larger. In addition, when the high-speed film conveying speed is increased or the speed is changed, the line-of-sight sensor has a large variation in the slitting position. There is a tendency to correct the reference line to be detected or to detect the reference line to be detected with high accuracy (clearly) and to not accurately measure the reference line to be detected. Further, in the second embodiment having two kinds of width direction adjustment functions, compared with the first embodiment having one width direction adjustment function, it is possible to perform slitting at an appropriate position with respect to the pattern even at a higher speed.

1‧‧‧Optical film roll manufacturing system

10‧‧‧Release Department

30‧‧‧cutting

41‧‧‧First Camera Department

43, 44‧‧‧ Second Camera Department

50‧‧‧Transportation Department

51, 53, 54, R2, R3, R4‧‧‧ Roll

60‧‧‧ Release position adjustment unit

70‧‧‧Winding Department

80‧‧‧Long sheet of optical film blank

81, 82, 83‧‧‧ long strips of optical film

90‧‧‧Information processing device

91‧‧‧Decision Department/Location Information Acquisition Department

92‧‧‧ Computing Department

93‧‧‧Control Department

95‧‧‧Monitor

411‧‧‧Circular lighting

431, 441‧‧‧ rod-shaped lighting

R1‧‧‧Optical film blank roll

Claims (13)

A manufacturing system of an optical film roll, which cuts an optical film material while conveying a long sheet-shaped optical film material having a pattern, and winds the obtained long sheet-shaped optical film into a roll shape. An optical film roll having an image pickup unit that images the image of the transported optical film blank; and a calibration unit that adjusts the optical film blank based on an image pickup result obtained by the image pickup unit The width direction position. A manufacturing system of an optical film roll, which cuts an optical film material while conveying a long sheet-shaped optical film material having a pattern, and winds the obtained long sheet-shaped optical film into a roll shape. An optical film roll having a discharge portion that discharges the optical film blank from an optical film blank roll, and a transport portion that transports the optical film blank discharged from the discharge portion downstream; the image pickup portion The pattern of the optical film blank conveyed by the transport unit is imaged, and the aligning unit adjusts a position in a width direction of the optical film blank based on an imaging result obtained by imaging by the imaging unit; and a slit portion disposed at a ratio The optical film blank conveyed by the transport unit is continuously cut along the longitudinal direction at a position on the downstream side of the imaging unit to obtain the long sheet-shaped optical film; The winding portion winds the optical film obtained by the slitting portion into a roll shape. The optical film roll manufacturing system according to claim 1 or 2, wherein the image pickup unit is in a state in which the transported optical film blank is in close contact with a convex curved surface formed in an arc shape along a longitudinal direction of the optical film blank. The aforementioned pattern is imaged. The manufacturing system of the optical film roll of claim 1, further comprising an illuminating unit that illuminates an imaging region including the aforementioned pattern of the optical film blank imaged by the imaging unit. A manufacturing system of an optical film roll according to claim 2, wherein the aligning portion has a discharge position adjusting portion that adjusts a position in the width direction of the discharge portion. The manufacturing system of the optical film roll of claim 2, wherein the aligning portion has a sheet aligning portion which is a part of the conveying portion and the optical film blank conveyed by the conveying portion The width direction position is adjusted. The manufacturing system of the optical film roll according to any one of claims 2 to 6, wherein the aligning portion has a discharge position adjusting portion and a sheet aligning portion, and the discharge position adjusting portion positions the width direction of the releasing portion Adjusting, the sheet aligning portion is a part of the conveying portion, and adjusts a position in a width direction of the optical film blank conveyed by the conveying portion, The first imaging unit includes a first imaging unit (A) disposed between the emitting unit and the sheet aligning unit, and a first imaging unit disposed between the sheet aligning unit and the slitting unit ( B) The release position adjustment unit adjusts the position in the width direction of the release unit based on an imaging result obtained by the imaging by the first imaging unit (A), and the sheet-like calibration unit is based on the first imaging unit (B) The imaging result obtained by imaging is adjusted in the width direction position of the optical film blank conveyed by the conveyance unit. The manufacturing system of the optical film roll of claim 2, further comprising: a second image pickup unit disposed at a position downstream of the slit portion and facing the longitudinal end surface of the transported optical film That is, the image is captured by the tangential line, and the display unit displays the image captured by the second imaging unit. The optical film roll manufacturing system of claim 1, wherein the optical film is a pattern retardation film in which a first phase difference region and a second phase difference region having different phase differences from each other are alternately arranged in the width direction. The optical film roll manufacturing system according to claim 9, wherein the optical film is a pattern retardation film-integrated polarizing plate comprising a laminated pattern retardation film and a polarizing film having an absorption axis parallel to the longitudinal direction. The pattern retardation film alternately arranges a first phase difference region and a second phase difference region having phase differences from each other in the width direction. The manufacturing system of the optical film roll of claim 1, wherein The optical film is a pattern film in which a light transmitting region and a light blocking region are disposed. A method for producing an optical film roll, wherein the optical film material is slit while conveying a long sheet-shaped optical film material having a pattern, and the obtained long sheet-shaped optical film is wound into a roll shape. Manufacturing an optical film roll, comprising: an image capturing step of imaging the aforementioned pattern of the transported optical film blank; and a calibration step of adjusting a width direction of the optical film blank based on an image pickup result obtained in the image capturing step position. A method for producing an optical film roll, wherein the optical film material is slit while conveying a long sheet-shaped optical film material having a pattern, and the obtained long sheet-shaped optical film is wound into a roll shape. An optical film roll comprising: a releasing step of discharging the optical film blank from an optical film blank roll; a transporting step of transporting the optical film blank discharged in the releasing step downstream; and an image capturing step The image of the optical film blank conveyed in the transporting step is imaged; the aligning step adjusts the width direction position of the optical film blank based on the image capturing result obtained in the image capturing step; and the slitting step, the optical light transported by the transporting step The film blank is continuously cut along the length direction, thereby obtaining the above-mentioned elongated sheet-shaped optical film; In the winding step, the optical film obtained in the slitting step described above is wound into a roll shape.