Title:
光学フィルムの製造方法及び光学フィルムの製造装置
Document Type and Number:
Japanese Patent JP7457495
Kind Code:
B2
Abstract:
An optical film 4 production method according to an embodiment of the present invention produces an optical film by implementing N processes (where N is an integer of 1 or higher) on a long film 2. The N processes are performed while the film is conveyed, and the positions of first and second ends 2a, 2b of the film are continuously acquired at a plurality of locations 20 during conveyance. When the distance from a basis position B in the width direction of the film to the position of the first end is a first width and the distance from the basis position to the second end is a second width, the basis position is calculated on the basis of a first acquisition result for the positions of the first end and the second end at the upstream location among two locations selected from the plurality of locations, and the difference between a first rate of change of the first width and a second rate of change of the second width is calculated on the basis of the first acquisition result and a second acquisition result for the positions of the first end and the second end at the downstream location among the aforementioned two locations.
Inventors:
Takuya Ando
Keiji Amitani
Keiji Amitani
Application Number:
JP2019223200A
Publication Date:
March 28, 2024
Filing Date:
December 10, 2019
Export Citation:
Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
G02B5/30; G01B11/00
Domestic Patent References:
| JP2010030099A | ||||
| JP8226811A | ||||
| JP2016139151A | ||||
| JP2014164001A | ||||
| JP2016148779A | ||||
| JP2014062817A | ||||
| JP2008525225A | ||||
| JP2016215393A |
Foreign References:
| US4984458 |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshinori Shimizu
Takashi Mikami
Kenichiro Wada
Yoshinori Shimizu
Takashi Mikami
Kenichiro Wada