BOBCAT HD-SDI
Hardware User’s Manual
Imperx, Inc.
Rev. 1.4
6421 Congress Ave.
6/2/2014
Boca Raton, FL 33487
+1 (561) 989-0006
44 of 175
VCCD
SHUTTER
Frame Time
Exposure
Figure 2.5 – Electronic shutter position.
2.4.2.
Programmable Frame Time
Variable frame time mode provides the ability to run the camera in full
resolution but at a slower frame rate than the nominal camera frame resulting
in increased exposure time for the frame. During normal camera operation (no
shutter), the nominal frame rate determines the integration time. The desired
frame rate, and thus the new integration time, can be achieved by moving the
vertical transfer pulse, VCCD, beyond the normal integration period (the
standard frame time) – Figure 2.6. The resultant frame rate can be calculated
using formula 2.2. The user can program the camera integration (frame time)
from the nominal camera frame time to 16 sec (~ 0.0625 fps) with a precision
of 1.0 us.
Frame rate [fps] = 1 / frame time [sec] (2.2)
VCCD
Programmable Integration Time
Standard Frame Time
Figure 2.6– Programmable frame time.
CAUTION NOTE
1.
If the frame time is greater than 500ms the camera has to be kept still
otherwise a motion smear will appear on the image.
2.
