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Operational techniques and how to obtain best imagery under various conditions
FrogEye
There were 6 questions found in this category:
How does FrogEye's EMCCD based night vision performance compare to image intensifier tubes? Image
intensifier tube based night vision systems provide a fairly constant
performance throughout a range of night conditions from starlight to
reasonably well illuminated urban conditions. As compared to day
imagery, both the resolution and contrast of image intensifiers is
low.
...
How does lens F-stop rating (aperture) relate to low-light and night performance? The
F-stop rating or aperture of a lens describes how bright the image
generated by the lens is as compared to the brightness of the object
itself. For example, if you are using a lens rated F/2.0, then
the image will be 1 / (2.0^2) = 0.25 or 1/4th as bright as the
object. Thus, a l...
Is training available for FrogEye? Yes,
training courses are available and are highly recommended; in
particular with your organization's first purchase of a FrogEye
system. While the basics of FrogEye operation are quickly
mastered, our three-day training courses primarily concentrate on the
techniques of long-standoff re...
What batteries are used in FrogEye? 1.
The FrogEye FC-2 camera uses an internal battery pack consisting of
eight 'AA' sized Nickel Metal Hydrite (NiMH) cells. NiMH is safe
for use aboard submarines or airplanes. The battery pack is
equipped with a temperature cut-off switch that triggers when the
battery reaches appro...
What is the battery life of FrogEye, and how reliable is the battery reserve indicator? The
FrogEye FC-2 internal battery lasts at least 90 minutes per
charge. Exact duration depends on the mode of operation, and we
have seen life times up to about 2 1/4 hours.
The battery charge indicator in the viewfinder and the battery charge
algorithm are all designed to minimize the ...
What target resolution can I expect with FrogEye during the day? The
smallest detail that you will see on a target at a given distance (such
as a person at 1km distance) depends primarily on these factors that
you can control:
1. The focal length of the lens. A longer focal length will
create a larger image of the target on the image sensor and there...
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