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The variable focusing operation changes the
optical gain of the instrument by less than ±1 percent, making the accuracy
essentially independent of focus.
The illuminated variable Field-of-View ranges
from 2° to 40°. The illuminated spot being measured on the target is variable
from 1.0 millimeter or less to 30 meters or more. Of course, the illumination
intensity fades out at wide angles or large spots, depending on the ambient
lighting conditions.
The working distance is from 2 cm to 100
meters.
The LED light source has only 2000-1
of the power density of a laser, so it is perfectly safe, and does not need the
CAUTION! Labels mandated by the FDA for lasers, which can burn the retina if
mishandled.
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