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Your guide to Machine Vision
Guide Topics
Machine Vision
System parts
Machine Vision Systems
Vision Techniques
Lighting Techniques
Major Illumination Types
Illumination Intensity
Illumination Basics
Specific Lighting Techniques
Polarizing Filters
Information About Lenses
Lens Basics
Lens Selection
Lens Characteristics
Image Processing Techniques
Major Image Processing Methods
Grayscale Edge Detection
Normalized Correlation Search
Binarization Stabilization Technique
Binarization Application Examples
Labeling
COUNT
Examples of Technique Application
Coated Glossy Surface, Engraved Mark Inspection
Detection of Scratches and Chips on a Low Contrast Surface
Detection of the Dimensions and Shape of Transparent Objects
Detection of Concave and Convex, Print on Curved Surface, and Contamination
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Major Illumination Types
The lights used for image sensors can be largely classified by the type and shape of the light source. There are various types of light sources such as fluorescent lamps, LEDs, and halogen units. The following is a classification of lights by shape.
Ring Type
Example of ring light usage Image captured with a ring light
This is the most common shape, allowing uniform intensity of light to be obtained over the entire ring. There are various types of light sources such as fluorescent lamps, LEDs, and halogen (fiber) units, with internal diameters varying from a few dozen to a few hundred mm.
Bar Light (Line)
Example of bar light usage Image captured with a bar light
Uniform light can be obtained in a linear shape. This is suitable for lighting up the front of a sheet widthwise and the size ranges up to 2 m.
Backlight
Example of backlight usage Image captured with a backlight Uniform light can be obtained over the flat surface. Generally, this is used as a backlight to light up a transparent container or lead frame from the back. The size varies from a few dozen square mm on the side to 500 x 800 mm.
Spot Light
Example of spot light usage Image captured with a spot light This mostly includes fiber lights using halogen light, allowing high illumination light to be locally obtained. This is also suitable for expanded images, etc. Various branched types, such as single, twin, and triple are available.


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