Lumenera Scientific Infinity Camera
Release 3.3 User’s Manual
Copyright 2004 Page 9
For the Infinity 2 only, the live video display will not show the extended exposure
(it will only show the maximum available when the extended option is not
selected), however, when you capture an image, the extended exposure will be
used for the capture.
Note: If you have image averaging turned on and are using
long exposures, you may have to wait a long time to capture
an image.
3.4.2 Gain
Adjusting the global electronic gain of your Infinity camera results in an increase
in sensitivity without increasing the exposure. The slider is under the exposure
slider on the main window as depicted in Figure 3. The global gain of each
Infinity camera model is optimized on start up. General image quality may
decrease as the gain is adjusted upward because the noise in the image is also
amplified along with the image signal. On some camera models such as Infinity
1, global gain is not adjustable and the slider will be disabled. In these cases,
individual RGB gains may still be adjusted. This feature is described under White
Balance.
Figure 3 - Exposure and Gain Control
3.4.3 Selecting the Light Source
Each light source emits light at a specific frequency resulting in a specific color
temperature. Color temperature measurement is typically referred to in degrees
Kelvin (K). Warmer tungsten / Halogen light sources have temperature in the
3000 K range. Fluorescent light sources have a temperature in the 4000 K range
and daylight conditions have cooler color temperatures in the 5500 K range.
Your Infinity camera is set to Tungsten / Halogen as a default. Selecting the light
source that best suits your working environment will help in optimizing your
images.
From the Options menu, you can select the light source as depicted in Figure 4.
Select Tungsten / Halogen for microscopy applications. When working in the
field, outdoor lighting conditions with a standard lens, selects the Daylight source.
When working indoors, office environment with fluorescent lighting, select the
Fluorescent source.
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