SWIR Acuros CQD Series, User Manual, Page: 34 / 121

User Manual
Acuros
®
CQD
®
Camera
34 | P a g e
7.2 Set Frame Time
Sets the frame time of the camera. The frame time cannot be set to a smaller value than the
exposure time.
7.3 Frames per Second (FPS)
The actual frames per second (FPS) output from the camera and the target FPS are displayed
below the Set Frame Time button. The primary parameter determining the FPS is the frame time,
and other factors include the camera resolution, pixel format, clock speed, and windowing
settings.
1. Each version of the camera has a minimum frame time/maximum FPS depending on the
resolution.
2. There is a fixed, 2ms overhead on the camera readout time which gives a hardware-
determined maximum frame rate of 500fps.
3. There is a minimum horizontal resolution (somewhere between 128 pixels and 256 pixels)
where the frame rate will not increase once the number of pixels is reduced below this
level.
4. Some example maximum frames per second data are shown in the table below for a
0.1ms exposure times and varying windowing settings.
Width setting Height setting Max Frames per Second
(Lo clock)
Max Frames per Second
(Hi Clock)
1920 1080 30 60
1280 1024 47 94
640 512 167 333
256 256 500 500
128 128 500 500
Table 7: Maximum frames per second for different windowing settings.
7.4 Set Exposure Time
The exposure time also known as the integration time is set in this field. This field is disabled when
Firmware NUC Tables are in use. Typical exposure times range from 0.5 ms (high speed
applications) to 15 ms (low light outdoor applications). The exposure time must be set to a value
less than or equal to the frame time and has a 4290ms maximum. The minimum exposure time is
0.005ms.
7.5 Windowing Settings
Windowing settings allow the user to select the pixels read by the ROIC and are limited by the
camera format. The table below shows the maximum values for the width and height settings
for each format.