Motion
Scope
â
PCI High Speed Video System
1 INTRODUCTION TO HIGH SPEED MOTION ANALYSIS
The
Motion
Scope High Speed Digital Imaging System records a sequence of digital images of an
event at a frame rate of 60 to 8000 frames per second, depending on the model of video system
used. The system stores these images in an Image Memory on the Controller Unit. These
images can be viewed forward or reverse at selected frame rates from 1 to 8000 frames per
second, frame-by-frame or freeze frame, to analyze motion and time during the event. You can
also save the sequence, or part of the sequence, in a computer file on a computer disk or
removable media for later retrieval and study.
This manual is written for a single camera system. If you have two or more cameras installed in
the host computer, use the Manual Addendum, part number 9400-0050.
1.1 Capturing the Video Image
The lens on the Camera Head focuses the subject onto a CCD imager. The Camera Head
accepts any C-mount lens or an optional CS lens, fixed or zoom, with a wide angle, normal view
or telephoto. The telephoto lens may be used in its normal range or in macro to capture a very
small subject. There is a locking ring under the lens to provide coarse focus adjustment.
The exposure of each frame is reduced at the higher frame rates, so more illumination is required
as the frame rate increases. The correct exposure may be achieved by opening the aperture. If
you still need more light, you must provide additional incandescent light. The
Motion
Scope
system also provides a Strobe output to control a strobe light for additional illumination.
1.1.1 The
Shutter
The system provides shutter control of image exposures that allows you to reduce the time of
each frame exposure to eliminate image blurring due to motion. You must increase illumination
to compensate for the shorter exposure. The Strobe output is synchronized to the shutter timing
so a strobe may be used to increase illumination as well as to eliminate motion blur. Refer to
Appendix C for shutter exposure information.
1.1.2 The Strobe Output
The Strobe output is enabled at all times during Live or Record mode. This is a TTL output pulse
synchronized to the shutter, so that the strobe output signal goes high when the shutter is open
and low when the shutter closes.
1.1.3 Lighting the Subject
The Camera Head Imager must receive enough light to see details of the image, and record the
subject at the optimum size, so the significant parts of the motion can be seen clearly. The
standard monochrome camera has an infrared filter to give subjects the correct gray scale
appearance. The same filter balances the colors for the color models.
Table 1-1 Light Value Requirements for the PCI System.
Standard Camera
Low-Light Camera Option
Frame Rate (fps)
LUX Value
Foot Candles
LUX Value
Foot Candles
50, 60
1.03
0.10
0.10
0.01
250 4.3 0.41 0.43 0.04
500 8.6 0.83 0.86 0.08
1000 17.2 1.65 1.72 0.17
2000 34.4 3.31 3.44 0.33
4000 68.8 6.62 6.88 0.66
8000 137.6 13.24 13.76 1.32
The Low Light Camera Option does not have the IR filter, which increases the sensitivity of the
system at low light levels. Table 1-1 gives minimum incandescent (tungsten) light requirements
for the standard and low light cameras at a 1X shutter setting. Refer to Appendix C to determine
the light values at other shutter settings.
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9400-0010 Rev. S
1-1
OPERATOR'S INSTRUCTIONS
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