Cheetah Python Camera with USB3 Interface
–
User Manual
December 5, 2017
Page
61
of
78
Rev 1.0
5 Camera Features
5.1 Exposure Control
5.1.1 Internal Exposure Control - Electronic Shutter
In global shutter mode, all pixels in the array reset at the same time, then collect signal
during the exposure time, and finally transfer the image to a non-photosensitive region
within each pixel. After transferring the image to the non-photosensitive region, the
readout of the array begins. In this way, all pixels capture the image during the same
period, which reduces any image artifacts due to motion within the scene. The maximum
exposure is frame-time dependent, and the minimum exposure is ~ 40 microseconds.
The camera normally overlaps the exposure and read-out times as shown in below.
Figure 33: Global Shutter with 8.33mS exposure time.
5.1.2 External exposure control
The camera can use an external pulse to control exposure. The pulse duration determines
the exposure. In global shutter mode, the minimum exposure time is about 40
microseconds.
