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MultiCam Boards Documentation > MultiCam Documentation > MultiCam User Guide > General Topics > Line-Scan Inspection Topics > Line Frequency Limits > Line Period for Permanent Exposure

Line Period for Permanent Exposure

In the permanent exposure operational mode, the maximum line frequency is dictated by the readout duration. The successive readout processes cannot overlap. This is suggested by the following figure.

In fact, the minimum line period is slightly larger than the readout duration.

In the case of the representative application, the minimum line period is about 512 µs, corresponding to a maximum line frequency of about 1950 Hz.

The maximum line frequency in the permanent exposure mode is a characteristic indicated in the camera data sheet. It is a significant performance indicator. The following formulae can be used.

It should be understood that operating the camera at the maximum line frequency inherently means that the exposure time is as short as possible. Consequently, the camera exhibits the minimal sensitivity. This implies that the maximum camera rate as specified by the data sheet can not be achievable for illumination reasons.