Today 3D machine vision is most commonly used for the precise three-
dimensional inspection and measurement of complex 3D free formed surfaces, but
new fields of applications are constantly being explored.
All acquisition signal types transmit image data from the camera to the host
system. Each technology has its own strengths and weaknesses and not all
mechanisms are suitable for every application.
Illumination for homogeneous illumination of uneven surfaces.
The simplest form of analogue interface uses a single 75 ohm coaxial cable
that transmits the video and timing information using the same signal.
Probably the most important factor that governs how the captured image appears
is the angle at which the light falls on the target.
Lens group comprising aspherical lenses
The back focal distance is the mechanical distance between the mating surface
of a lens on the housing of a camera and the camera sensor.
Technique positioning a diffuse illuminator behind the object to produce a
Light source placed behind the object so that it appears dark on a light
Similar to colour filters band-pass filters intensify the image contrast as
they only let light pass of a defined wavelength range.
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