An analysis device for analysing a transparent or specular surface of a substrate, the device including a raster located opposite the surface of the substrate to be measured, a video camera for capturing at least one image of the raster deformed by the measured substrate, a raster lighting system, and an image-processing and digital analysis mechanism connected to the video camera. The video camera is a matrix array camera, the raster is provided on a substrate having an oblong shape and is bidirectional including a first pattern extending along a first direction and along a smallest extension of the substrate, the first pattern being transversely periodical to the smallest extension, and a second pattern extending in a second direction perpendicular to the first pattern and along a largest extension of the substrate.

Device for analysing the surface of a substrate

Shape inspection is carried out without preparing an inspection apparatus for each model of product. There is provided a shape inspection method comprising a first step of placing an object to be measured on an inspection stand for actual measurement, a second step of obtaining information of the surface shape of the object, a third step of calculating shape data of the object in a weightless state based on the information of the surface shape of the object, and a fourth step of recalculating the shape data of the object in a state that the object is placed on a predetermined inspection stand based on the shape data in the weightless state of the object, and judging the quality of the object based on the recalculated shape data of the object.

Shape inspection method and apparatus

An apparatus for examining a flat panel display device and a method thereof is provided. The tact time for examining a glass substrate is reduced as much as possible, manufacturing costs are reduced by simplifying a product, and a foot print is reduced. The apparatus includes a base frame, a carrier carrying a glass substrate from a side to the opposite side of the base frame, an auto-probe to capture an image of the glass substrate and examining whether or not the glass substrate is inferior using captured data, and a visual inspector inclining the front side of the glass substrate forward to allow inspection of the glass substrate with the naked eye. According to the apparatus, the tact-time is shortened and the foot print is reduced.

Apparatus for examining flat panel display device and examining method thereof

A transparent body inspecting device includes: a light application unit for applying light to a transparent body; an image capturing unit which captures an image of the transparent body and in which a depth of field is smaller than a height of the transparent body; an image capture driving unit for moving the image capturing unit in a direction in which the image capturing unit is brought close to the transparent body and in a direction in which the image capturing unit is brought away from the transparent body; and a defect determining unit for determining existence or nonexistence of a defect in the transparent body based on whether or not brightness of pixels in the image captured by the image capturing unit is nonuniform, wherein: the image capturing unit carries out image capture more than once while moving in the direction in which the image capturing unit is brought close to the transparent body or in the direction in which the image capturing unit is brought away from the transparent body; and when the brightness of pixels in the image captured by the image capturing unit is nonuniform, the defect determining unit determines that a defect exists within the depth of field at the time of capture of this image.

Transparent body inspecting device

The invention discloses a detection method based on a test picture of a liquid crystal screen. The detection method includes the following steps that 1, the screen picture in the test mode of the liquid crystal screen is obtained and converted into a grayscale image; 2, grayscale values of all pixel points in the grayscale image are obtained and compared with a preset grayscale value standard template, if the values are equal, detection is qualified, and otherwise the detection is unqualified. The liquid crystal screen is automatically detected, the detection efficiency is high, and the detection accuracy is high. The invention further discloses a detection system based on the test picture of the liquid crystal screen. The detection system comprises a storage module, an image obtaining module, an image conversion module, a checking module and a detection result module. The detection efficiency of the system is high.

Detection method and system based on test picture of liquid crystal screen

A device and method for evaluating the optical distortion of light passing through a transparent plate body. To image a grid pattern (2) through a glass plate (3) by means of imaging means (4), 4n±α CCD pixels are provided for n grids (pairs of bright and dark portions) and α Moire fringes are formed. According to the gray data on the captured image, the sine wave of phase A and that of phase B shifted from phase A by 90° are combined. The phase angle of each pixel on the Lissajous figure is calculated from the sine waves of phase A and phase B. The refractive power is calculated from the phase angular velocity which is the difference between the phase angles of the pixels.

Atsushi Miyake

Papers

Device and method for evaluating optical distortion of transparent plate body