A communication device includes a communication control unit generating a communication signal to be transmitted to an external source and an encryption unit connected to the communication control unit through a wiring. The communication control unit stores a predetermined communication signal indicative of a predetermined message and a target duration required for from a transmission of the predetermined communication signal to a reception of the same from the encryption unit. The communication control unit further counts an actual duration taken from the transmission of the predetermined communication signal to the reception of the same from the encryption unit. When the actual duration is longer than the target duration, the communication control unit determines that a fraudulent circuit is inserted into the wiring for fraudulently acting on the communication signal.

A method and system for optically inspecting parts are provided wherein the system includes a part transfer subsystem including a transfer mechanism adapted to receive and support a part at a loading station and to transfer the supported part by a split belt conveyor so that the part travels along a first path which extends from the loading station to an inspection station at which the part has a predetermined position and orientation for inspection. An illumination assembly simultaneously illuminates a plurality of exterior side surfaces of the part with a plurality of separate beams of radiation. A telecentric lens and detector assembly forms an optical image of at least a portion of each of the illuminated side surfaces of the part and detects the optical images. A processor processes the detected optical images to obtain a plurality of views of the part which are angularly spaced about the part.

In an alternative embodiment the method and system for optically inspecting headed manufactured parts employ an inclined split track to cause the part to traverse an inspection station by gravity feed. The part is inspected for conformity to dimensional and visual standards and sorted under control of a processor based on images of the part obtained from occluded light and reflected light while the part is within the inspection station.

An apparatus and a method recognizes stamped characters, detects stamped depths of characters using the same, and/or accurately recognizes characters even when an image distortion occurs at stamped portion due to different stamped depths of characters.

CD variations and/or MD variations in scan measurements are determined from spectral components of power spectra of scan measurements taken using two or more scanning speeds. Dominant spectral components having the same spatial frequencies identify CD variations and dominant spectral components having the same temporal frequencies identify MD variations. Dominant spectral components are extracted from a noisy power spectrum (PS) by sorting all spectral components into an ordered PS. A first polynomial representing background noise of the ordered PS is used to set a first threshold. Spectral components of the ordered PS that exceed the first threshold are removed to form a noise PS. A second polynomial representing the noise PS is used to set a second threshold. Spectral components of the PS that exceed the second threshold are identified as dominant spectral components of the PS.

A light 2 for reflected light that emits visible light for reflected light onto a front side of a veneer 6, a light 32 for invisible light that emits near-infrared light for transmitted light onto a back side of the veneer 6, and an image processing device 1 that detects defects of the veneer 6 by analyzing a captured image generated by a line sensor camera 4 are provided. Defects of the veneer 6 are discriminated on the basis of a set of shading and shapes in an infrared-transmitted-light image based on the transmitted light, and colors in a visible-light image based on the reflected light. Consequently, even if a defect has a small color difference from a normal part in the visible-light image, difference of shading between the defective part and the normal part appears in the infrared-transmitted-light image, and a defect that is difficult to detect by seeing only a color difference in a visible-light image can be relatively easily detected.

To inspect the shape of a metallic body further accurately, regardless of surface roughness of the metallic body. A shape inspection apparatus for a metallic body according to the present invention includes: a measurement apparatus configured to irradiate a metallic body with at least two illumination light beams, and measure reflected light of the two illumination light beams from the metallic body separately; and an arithmetic processing apparatus configured to calculate information used for shape inspection of the metallic body on the basis of luminance values of the reflected light. The measurement apparatus includes a first illumination light source and a second illumination light source configured to irradiate the metallic body with strip-shaped illumination light having mutually different peak wavelengths, and a color line sensor camera configured to measure reflected light of first illumination light and reflected light of second illumination light, separately. The first illumination light source and the second illumination light source are provided in a manner that their optical axes form substantially equal angles with a direction of regular reflection of an optical axis of the color line sensor camera at a surface of the metallic body. A wavelength difference between a peak wavelength of the first illumination light and a peak wavelength of the second illumination light is equal to or more than 5 nm and equal to or less than 90 nm.

A substrate is tested with an interferometer in-line in a roll-to-roll processing operation to detect defects and exclude them from further processing. A tilt is introduced in the illumination path of the interferometer to allow detection of best fringes in a selected measurement field of view (FOV) that is smaller than the camera FOV in the direction transverse to the fringes. At each acquisition frame, the measurement FOV is shifted to track the best-fringe position within the camera field of view based on irradiance acquired at the previous step. As a result, the system is able to accommodate substrate flutter and roller runout and maintain focus on the substrate that allows precise identification of defects and their isolation for subsequent processing.

The invention relates to an arrangement for contactless determination of at least one dimension of a moving material web, in particular a material web of opaque material, with a background illumination, with optical detection means for detecting at least one current contrast image and with evaluation means, wherein the background illumination is arranged opposite the optical detection means, wherein the material web moves in a plane between the at least one optical detection means and the background illumination, and wherein the current contrast image has at least one piece of information about at least one light intensity laterally adjacent to the material web. Furthermore, the present invention concerns a corresponding process. For simplifying and improving the non-contact determination of the dimension, the present invention proposes to provide a shadowing element and to compare the current contrast image with a reference contrast image, wherein the current contrast image represents a shadowing of the background illumination by the material web and by the shadowing element.

Disclosed is a stone-block analysis device and method for the evaluation of stone blocks, in particular, concrete blocks to be arranged on a conveying device for conveying the stone blocks with a conveying surface for the stone blocks to be laid on, which extends into a longitudinal direction and into a transverse direction. The stone-block analysis device has at least one first scanner unit for scanning at least one physical characteristic of the stone blocks, an evaluation device for evaluating a signal output by the scanner unit, a control device, and a display device. The scanner unit is spaced away from the conveying surface in a vertical direction, perpendicular to the longitudinal direction and transverse direction. In addition to the first scanner unit, which is a point scanner, at least one second scanner unit is provided, which is a line scanner, wherein a height of at least one stone block can be detected by both scanner units.

An apparatus for inspecting or observing a material web, a process of inspecting the material web and a method for operating the apparatus for inspecting or observing the material web are provided. The apparatus has a guiding device through which the material web is guided and a camera including a field of view and configured to record an image of the front side within the field of view. An incident light transmitter is configured to illuminate the front side with incident light, and a background panel is arranged on the rear side of the material web within the field of view. The background panel includes a diffuser plate, a light guide plate, a reflecting surface, and a light source configured to couple light into the light guide plate which is configured to uncouple the light to illuminate the rear side of the material web with transmitted light.