Technical terminology

Stand-off

This is the distance between the end of the vision module and the plane at which a feature will be at the sharpest focal distance to provide optimum image capture.

VM10 and VM11 stand-off

Field of view

This is the maximum size area that will be projected onto the CMOS sensor when the correct stand-off distance is used.  Any feature requiring inspection with RVP must be located within the field of view to allow inspection.

RVP module field of view

Depth of field

The depth of field specifies the range over which a feature can deviate from the nominal stand-off distance and still be measured with acceptable levels of metrology performance.  If features are measured outside the recommended depth of field range, metrology performance and accuracy will decrease.

RVP module depth of field