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Basic Knowledge for Operation
158
ZG User’s Manual
Sensitivity Adjustment and Measurement
Operations
What is “Sensitivity Adjustment?”
It is relatively easy to measure the shape of a measurement target that receives a
sufficient and uniform amount of light. However, in the case of measurement targets
having a complex shape, inclined surfaces cause reflected light to decrease and areas of
insufficient received light to occur. There are also cases where the amount of received
light is insufficient or, alternatively, saturated caused by the color or material of the
measurement target.
In this way, the sensitivity of the Sensor must be adjusted so that shapes are accurately
captured even if the shape, color, material, etc. of the measurement target is influenced.
In the case of a
mountain-shaped
measurement object
Light
emitted
from
Areas where
reflected light will
have difficulty
entering the CCD
High Low Medium Low High
Reference
plane
Reflectance
The reflectance of the reference plane
differs from that of inclined surfaces.
Areas having low reflectance
cannot be measured due to
insufficient light amount.
Sensitivity
adjustment
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