Abstract: An optical sheet is moved by a conveyor belt, and at least one beam is configured above the conveyor belt. When the beam is intersected by the moving optical sheet, the optical sheet is determined to be curled. The present invention achieves automatic in-line measuring of optical sheet curls by precise optical measurement and thus enhances measuring accuracy and raises measuring speed.

Abstract: The present invention discloses an apparatus and a method for measuring phase retardation. The apparatus comprises: a monochromatic light source, being capable of radiating a pulsed light beam; a photodetector, deposed on a side of the monochromatic light source; a polarizer, deposed between the monochromatic light source and the photodetector; and a beam splitting apparatus, deposed between the polarizer and the photodetector.

Abstract: An LCD panel testing device and method thereof, wherein the LCD panel comprises in the sequence of a first polarizer, a first retardation plate, a liquid crystal unit, a second retardation plate, and a second polarizer. The LCD panel testing device includes: a light generation device, capable of providing a light source; a rotatory base, capable of supporting the LCD panel to form a proper angle with the direction of the light source, adjusting the relative phases of the first and the second retardation plates by rotating them, and substituting the first and the second retardation plates if necessary; a light detection unit, arranged according to the light generation device capable of detecting the light from the LCD panel; an optical signal examination device, connected with the light detection unit capable of examining the data from the light detection unit.

Abstract: An optical sheet is moved by a conveyor belt, and at least one beam is configured above the conveyor belt. When the beam is intersected by the moving optical sheet, the optical sheet is determined to be curled. The present invention achieves automatic in-line measuring of optical sheet curls by precise optical measurement and thus enhances measuring accuracy and raises measuring speed.

Abstract: A polarizer testing device and method thereof, wherein the polarizer testing device comprises: a monochromatic light source capable of providing a monochromatic light; a light detecting module arranged according to the monochromatic light source capable of converting the light signal of the monochromatic light source into readable data; an adjustable base arranged between the monochromatic light source and the light detecting module capable of supporting a polarizer for testing and fine tuning the angle of the polarizer for testing, wherein the monochromatic light is detected by the light detecting module after passing through the polarizer for testing. A stationary base can be further arranged in the polarizer testing device, which the stationary base is arranged between the monochromatic light source and the adjustable base capable of supporting a polarized polarizer for the light to pass through to form a polarized light.