Any reason why the single pixel wide capture approach is used? Seems very prone to operator setup error. It has to be exact at the finish line and exactly parallel to the line and there's no easy way of knowing if it was setup correctly after the face.
Wouldn't it be better to set up multiple high speed cameras at different angles
High speed cameras produce significantly more output data, which makes them more expensive I'd have to imagine.
Not to mention a high speed camera misaligned on the finish is going to produce similarly skewed results. Anything not happening exactly along the optical axis is getting distorted by perspective. At least a line camera doesn't pretend to have accurate information on anything except the line you aim it at.
Wouldn't it be better to set up multiple high speed cameras at different angles