摘要:
A data compression interface is characterized by a memory system having an architecture configured from a first and a second serial memory connected in parallel. One memory serves during alternate frames as a data collection memory while the other serves during that same frame as an output memory.
摘要:
A method for inspecting wafers or other flat objects having an object surface, comprises the steps of providing a camera assembly with a camera for recording images of said object surface or portions of said object surface during an exposure time which is limited by a shutter; generating a continuous relative movement of said camera assembly and said object without interruption, whereby a movement blur of said image during said exposure time is caused; continuously illuminating said object with an illuminance which is controlled to remain at the same value; and recording one or more images of at least one of said portions of said object surface with said camera; defining a movement blur which is acceptable for an analysis of said image wherein said exposure time is smaller than a time causing said acceptable movement blur; and performing said analysis of said image.
摘要:
An apparatus for inspecting the surface of a web material moving lengthwise at a constant speed by scanning the surface in the direction of the width of the surface with a light beam. The scanned beam modulated by the surface is received and converted into an electric signal which is divided into division signals representing lengthwise areas of the surface. At least one of the lengthwise areas or lanes into which the surface is divided is specified to be subjected to surface inspection. Surface signals of the specified lengthwise areas or lanes are separated from the other surface signals and evaluated for qualifying the surface of the web material.
摘要:
An apparatus for inspecting the surface of web material moving lengthwise at a constant speed by scanning the surface in the direction of the width of the surface with a light beam. The scanned beam modulated by the surface is received and converted into an electric signal which is divided into division signals representing divisions of the width of the web. A first memory capability is provided for storing division signals added together by division every N transverse scans. The added division signals are transferred to a second memory capability by division, for evaluating the surface defect distribution of the scanned surface division by division.
摘要:
A method for inspecting wafers or other flat objects having an object surface, comprises the steps of: providing a camera assembly with a camera for recording images of said object surface or portions of said object surface during an exposure time which is limited by a shutter; generating a continuous relative movement of said camera assembly and said object without interruption, whereby a movement blur of said image during said exposure time is caused; continuously illuminating said object with an illuminance which is controlled to remain at the same value; and recording one or more images of at least one of said portions of said object surface with said camera; defining a movement blur which is acceptable for an analysis of said image wherein said exposure time is smaller than a time causing said acceptable movement blur; and performing said analysis of said image.
摘要:
The invention features a real time system for detecting streaks or scratches which occur substantially parallel to the direction of motion of a continuous web of material. The system can also be used to inspect sheets of material that may have been cut from such webs. An energy source such as an incandescent lamp or a bank of lamps generates electromagnetic energy that impinges upon the continuous web of material. CCD cameras receive reflected specular radiation from the web and generate video signals. The CCD cameras are disposed opposite the energy source and within 5.degree. of the plane perpendicular to the continuous web plane. Alternatively, the energy sources may transmit energy through the web material, which energy can be received by the CCD cameras. A processor is connected to the CCD cameras to process the video signals and to generate an enhanced signal-to-noise ratio signal that represents a streak or scratch on the web.
摘要:
To measure the period with which a surface defect recurs in a surface of a web-like material moving in its lengthwise direction, surface defects distributed over the surface are detected in that lengthwise direction. Positional data and distance data as to the detected surface defects relative to one another are collected for a predetermined length of the web-like material. The web-like material is determined to have a periodic surface defect appearing with a period between predetermined maximum and minimum periods when the distance data include a distance equivalent to an elemental period that is a whole-number multiple of a fundamental period.
摘要:
A method of scanning a web material and an apparatus for use in the method in which a web material is spatially divided into smaller divisions in a scanning direction while being scanned in the direction of a width thereof with a scanning beam moved by means of a polyhedral mirror with a constant speed of rotation. Clock pulses from a pulse generator are counted up by a counter to access division data in a storing means to provide division signals according to which the width of the web material is spatially divided in the scanning direction.