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ifm Vision Assistant 3D camera O3X1xx
UK
7.1.3 Setting the exposure time
Depending on the scene, the dynamics for 1 exposure time may be too high . This applies in particular to:
●
Areas with many different reflectivities (e .g . black, white, shiny)
●
Areas with many different distances to the device
In this case, the image quality is increased by 2 exposure times . This increases the evaluation time and
the sensitivity to movements in the scene .
In case of a "capture mode" with 1 exposure time, the following settings are available:
The single exposure is intended for scenes with low dynamics .
The exposure time is set in μ
s. The value can be changed with the
slider bar or entered in the box.
In case of a "capture mode" with 2 exposure times, the following settings are available:
The double exposure is intended for scenes with high dynamics .
The exposure time is set in μ
s.
The longer exposure time can be changed with the "Exposure
time" slider bar or entered in the box.
The shorter exposure time can be changed with the "Exposure time
ratio" slider bar or entered in the box.
Example
The following figure shows the 2D and 3D captures of a chessboard section at a distance of 60 cm with
different exposure modes .
1: An exposure time of 500 µs, white surfaces almost saturated, black surfaces noisy
2: Two exposure times of 500 µs and 3500 µs, white and black surfaces sightly noisy