LED classification of light sources in machine vision
Coaxial light sourceThe coaxial light source can eliminate the shadow caused by the uneven surface of the object, thus reducing the interference; the part adopts a spectroscope design to reduce the light loss, improve the imaging clarity and irradiate the object surface uniformly. Application: series are most suitable for high reflection, such as metal, glass, film and chip surface scratch detection, damage detection chip and the silicon wafer, Mark point positioning, packaging barcode recognition.
Spherical integrating light sourceA hemispherical inner wall with integral effect, which reflects evenly the light emitted from the bottom 360 degrees, so that the illuminance of the whole image is very uniform. Applications: surface, concave and convex, arc surface detection, or metal, glass surface reflection of strong object surface detection.
AOI special light sourceDifferent angles of the tricolor light illuminate, illuminate the three-dimensional information of the solder; plus the diffusion plate light, reduce reflection; different angle combination; application field: used for circuit board solder inspection.
Bar light sourceThe strip light source is the preferred light source of the larger square structure; the color can be freely assembled according to the requirement; the illumination angle and the installation can be adjusted at will. Applications: metal surface inspection, image scanning, surface crack detection, LCD panel inspection, etc..
Machine vision LED light sources are usually divided into the following categories by shapes:1, ring light sourceThe annular light source provides different irradiation angles, different color combinations can highlight the three-dimensional information of the object; high density LED array, high brightness; a variety of compact design, saving installation space to solve the shadow problem; diagonal irradiation light guide plate; optional diffuse, uniform light diffusion. Applications: PCB substrate inspection, IC component inspection, microscope illumination, liquid crystal correction, plastic container inspection, integrated circuit printing inspection2, Bei GuangyuanThe high density LED array surface provides high intensity backlight illumination, which can highlight the shape and outline characteristics of the object, and is especially suitable for being a stage of the microscope. Red and white dual backlight, red and blue backlight, can be deployed in different colors, to meet different requirements of the tested multi-color. Applications: mechanical parts size measurement, electronic components, IC appearance detection, film spot detection, transparent object scratch detection, etc..
