Omron B5WC - 1 Overview; 2 Structure; Principle; 3 Dimensions

B5WC Built- In Color Sensor User's Manual ( E612- E1- 01) 6
1 Overview
This User's Manual describes the usage and special notes of B5WC, the color sensor to build into
equipment.
This document is intended to supplement the datasheet and product specifications, which should be
referenced when using the sensor.
2 Structure
The built-in color sensor B5WC is composed of a white LED light source
with a wide wavelength range of visible light, an RGB photo IC with a PD
(photo diode) that detects light in each of the three primary colors of light
(red, green, and blue), an optical lens, an internal circuit with the MCU, and
other dedicated components.
<Principle>
・ White LED light emitted from the color sensor
reflects off the surface of the sensed object, and the
reflected light is focused by the optical lens and
enters the RGB photo IC.
・ The light reflected from the sensed object contains
R/G/B wavelength regions that provide color
information, and the RGB photo IC detects each of
the received light intensity. This light intensity value
is converted into R/G/B output voltage value.
・ The RGB output voltage value is loaded from an
upstream system via the I
2
C bus.
3 Dimensions
Shown below are the dimensions of the color sensor. Refer to the datasheet for details.
Note that the external dimensions and screw mounting hole dimensions are the same as those of OMRON's
light convergent reflective type sensor B5W-LB21 series.
Light emitting/receiving surface
Emitted
light
Reflected
light
Object: Red
Emitted
light
Reflected
light
Emitted
light
Reflected
light
Object: Green
Object Yellow