Omron B5WC - 5 Usage (Detection); Electrical and Optical Characteristics; Receiver Output - Sensing Distance Characteristics; Receiver output ratio - Sensing Distance Characteristics

B5WC Built- In Color Sensor User's Manual ( E612- E1- 01) 8
5 Usage (Detection)
Shown below are the electrical and optical characteristics described in the product specifications for Model
B5WC-VB2322-1.
Since this sensor is used in applications to detect various objects, the output voltage value is defined by a
gray color reference board that is achromatic. Omron uses gray as its standard because gray is a color in
which all RGB wavelength regions are theoretically equal.
The optical characteristics of the sensor can be confirmed mainly by the characteristic diagram that
graphically shows the receiver output of the color sensor versus sensing distance and the ratio of receiver
output. The characteristics diagrams shown below are charts that indicate the relationship between the
sensor output voltage and sensing distance for various sensing objects.
For example, the product specifications for the RGB output voltage values for a gray reference plate are
given as TYP:0.45V @d=40mm, which means that the output voltage at a sensing distance of 40mm in the
following "Receiver output and Sensing distance characteristics" is around 0.45V for each of RGB.
The RGB output voltage ratio to this gray color reference plate is shown in the receiver output ratio and
distance characteristic diagram (informative), which indicates that the difference in the RGB output ratio is
within about 10% or less even when the sensing distance changes in the range of 10 to 70mm.
When designing the structure of the equipment to which the color sensor is incorporated, the distance
between the sensor and the sensing object should be determined by referring to the "Receiver output -
Sensing distance characteristics". In the case that the sensing object position does not fluctuate, the
sensing distance is recommended to be set at the position within the range from 30 to 50mm where the
characteristics curve is relatively small.
Receiver Output - Sensing Distance Characteristics
Receiver output ratio - Sensing Distance Characteristics