Patent ID: 6520056
Filing Date: 2003-02-18
Classification: B26D,B26F,G02B,Y10T

Abstract:
An apparatus for producing a linear polarizer which has an illuminated side and a non-illuminated side, and which further has a cut edge in alignment with a polarization axis thereof, the apparatus comprising:an optical film cutting machine for cutting optical films; a light measuring sensor configured for measuring intensity of light transmitted through said linear polarizer and generating a control signal in response thereto; said cutting machine having a controller for controlling a shape characteristic of said linear polarizer, wherein said controller is responsive to said control signal; wherein said light measuring sensor is disposed on the non-illuminated side of said linear polarizer; an optical fiber, at least optically coupled to said light measuring sensor, for transmitting optical signals representative of light passing through said linear polarizer; a linear polarized lens; and wherein said optical fiber comprises a first end, at least optically coupled to said light measuring sensor and a second end, at least optically coupled to said linear polarized lens; said linear polarized lens is configured to be rotated so that a first absorption line of said linear polarized lens is crossed with a second absorption line of said linear polarizer when said light measuring sensor detects a minimum intensity level of light passing through said linear polarizer and said linear polarized lens.