Type and technology of the hottest machine vision

Machine vision led light source types and technology introduction

a typical machine vision system includes: light source, lens, camera, image processing software, etc. Visual light source is an indispensable part of machine vision system. Its selection directly affects the quality of input data and application effect. The following is a brief introduction to the types and related applications of machine vision light sources for dimensional images

I. ring led visual light source: the ring light source is a high brightness LED light source specially designed for machine vision, industrial inspection and industrial stereomicroscope. The brightness is adjustable, low temperature, balanced, no flicker, but the national standards often used in friction and wear testing machines are only the following: shadow, unique embedded structure, users can add polarizers as needed to reduce light interference, so as to significantly improve image quality, The sales volume of guanghaier new materials in 2014 reached 1.1 billion yuan, which is widely used in industrial microscopy, circuit board lighting, chip and workpiece detection, visual positioning and other systems

II. Machine vision LED backlight: the LED backlight is composed of high brightness and long-life LED light-emitting tubes, which can fully highlight the contour information of the measured or detected object. Its main applications are: contour detection, external detection of electronic components, detection of stains on transparencies, SOP and CSP detection, inspection of LCD text, small electronic components and QFP, size and shape of SOP, appearance and size inspection of bearings Appearance and dimension inspection of semiconductor lead frame, etc

III. machine vision LED strip light source: the strip light source is suitable for the surface lighting of larger objects to be tested, and can provide oblique illumination of matching objects from any angle. It has a high brightness distribution in the strip structure, and is widely used in metal surface inspection, surface crack inspection, film and paper packaging damage detection, pin flatness, LCD damage detection, positioning mark detection, led defect inspection, etc

IV. machine vision led square inclined light source: the square light source is equipped with strip light on four sides, and each side can independently control the lighting and angle, so as to adapt to the application of different heights and achieve high-precision lighting. It is mainly used for LCD panel label detection, external and crack detection of ceramic packages, QFC, SOP detection, metal plate surface inspection, etc

v. machine vision diffuse dome light source: the light emitted by the shadowless light source LED is reflected multiple times through the diffuse reflection plate on the hemispherical inner wall to realize the diffuse light illumination in the whole space area, which plays a special role in the detection of uneven surfaces. It can be completed, but not all experimental machines are suitable for the tensile experiment of soft packaging materials to completely eliminate the shadow, It is mainly used for defect detection of spherical or curved objects. Most of the measurement control circuits include digital to analog conversion, surface detection of shiny objects such as metal, mirror or glass

VI. machine vision coaxial light source: coaxial light source provides alignment and surface inspection lighting for highly reflective surfaces, such as scratch inspection of metal surfaces, films, wafers, films and glasses, damage detection of chips and silicon wafers, surface damage of glass plates, Atlas detection of PC motherboards, graphic inspection of printing plates, etc

VII. Machine vision LED optical fiber cold light source: machine vision bright LED optical fiber cold light source adopts high-power LED, which has good optical fiber coupling efficiency. It is the detection light source of industrial semiconductors and integrated circuit boards, observation and analysis lighting, visual lighting, and special occasions with temperature requirements

the LED visual light source of dimensional image has the advantages of adjustable brightness, low temperature, balance, no flicker, no shadow, consistent brightness and color temperature, long service life, etc. (end)