SVS-Vistek eco4050TR, Manual, Page: 9 / 142

SVS-VISTEK
The EVO Series 9
3.3 Tracer adds dynamic lens control
The increasing usage of machine vision in various branches such as
agriculture or packaging and tracking puts new challenges to the
manufacturers of machine vision applications. Very often varying
distances and difficult light conditions make integrating machine vision
into a workflow a hard job. SVS-Vistek pioneered the integration of
variable focus lenses into machine vision.
This chapter applies to the Tracer models (with “TR” in its type name like
the EXO304MGETR)
3.3.1 Tracer with Micro Four Thirds mount
The Tracer accepts this new challenge with a full blown dynamic lens
functionality. Equipped with the well known MFT (Micro Four Thirds)
bayonet, the Tracer supports
>
Adjustable focus
>
Adjustable zoom
> Adjustable aperture
With this featureset, the Tracer is able to focus extremely fast on various
distances and can do closeups without loss of resolution. With zoom
being relatively slow, aperture and focus adjustment in most cases is done
within 10-20ms (depends on the lens, though).
All of theses functions can be accessed in the application by the camera
programming interface or via GenICam properties. This makes
integration of dynamic lens control into third party software possible with
no effort. Power supply and data control for the lens are done through the
MFT bayonet, so no external cables are visible.
The MFT lenses are optically optimized for sensors up to 1.3”, perfectly
suited for machine vision sensors. The optical construction defined by the
MicroFourThirds consortium, telecentric on the sensor side, provides
smooth images and very low shading. Mechanically built on magnetic
rails in most cases, the stability and repeatability of the lenses is
surprisingly high. A wide selection of suitable lenses for any application is
available. As a surplus, MFT lenses provide excellent optical performance
regarding their price tag.
Due to the size of MFT Bayonet, the Tracer camera size has to be a bit
larger than normal SVS-Vistek cameras do, as the bayonet would not fit
into the std camera housing dimensions. Inside the camera case you’ll
find exactly the same electronics power pack with all of its features and
latest high performance sensors.
Please note, there are versions with CANON EF support and version with
liquid lens support as well, but with limited functionality (e.g. only focus
with liquid lens). These are available on request for some selected Tracer
camera models.