Omron E3X-NL DATASHEET
Optical Fiber Glossy Object Sensor
E3X-NL
Utilization lightwave technology has innovated glossiness detection. OMRON's
glossy object sensor can discriminate a
wide variety of glossiness differences. The
fiber-optic system has achieved the small,
non-contact models.
E3X-NL
Features
Employs OMRON's unique FAO (Free Angle Optics)
technology which enables delicate sensing of object
glossiness without influence from colors and patterns.
Transparent films on boxes and labels on transparent films
can be detected.
Long-rangeShort-range small spot
The teaching system ensures easy adjustment just by pressing the button.
● Adjustment man-hour saving
type requiring only a one-time
pressing of the button
● Teaching system only requires to push the button, ensuring sensitivity adjustment
without individual differences.
Two different types of fiber heads meet a wide range
of applications.
Two different fiber heads are available.
According to applications, you can choose the short-distance,
small spot type ideal for detection of small objects or the longdistance type that can perform in-line standard detection.
Short-distance, small spot type
E32-S15-1/-2
Ideal for precision detection
and small object detection.
10
±
3 mm
Small spot in 2 mm dia.
Long-distance type
E32-S15L-1/-2
Resistant to object shake and
enables in-line standard detection.
20
±
7 mm
Adopts the pulse-ON system that is insensitive to disturbance light
The emitter (red LED) in the fiber head uses a pulse-ON
system to minimize the influence of disturbance light. The
Sensor provides stable sensing characteristics if disturbance
light occurs from fluorescent lamps in-line.
Amplifier Units
E3X-NL11
A-197E3X-NL
Short-distance, small spot type
Application
Detection of tacked labels Detection of grease or adhesive on parts
Long-distance type
Detection of on-bottle labels insensitive to
distance variation or object inclination, enabling label detection on conveyor line.
Detection of shrink tubes Transparent shrink
tubes can be detected stable.
Detection of pipe, can or similar joints
Detection of sealing tape
Features
Principles for Glossiness Detection by FAO
First, the light from a red LED passes through a polarizing filter so only the S wave is emitted.
If the detectable object is glossy, the S wave is reflected regularly and is transmitted as is to the Fiber Receiver 1.
If the detectable object is not glossy, there is more diffuse reflection, thus the polarization direction is randomized and a P
wave is generated.
The S and P waves are divided by the FAO (special polarized
beam splitter), the waves travel to their respective fiber receivers, and the variation in the glossiness is determined by comparing the two received signals.
Received fiber 2
(P wave only)
Received fiber 1
(S wave only)
Emitter
Lens
S wave: vertical
P wave: parallel
FAO
Emission S wave only
Polarized filter
Sensing
object
Fuzzy Teaching Function Backs up Stable Detection
Supported by the fuzzy teaching function if objects have no
difference in glossiness. If the glossiness difference goes below than the minimum sensing level, the microprocessor in the
Difference in
grossiness
Difference in
light energy
amplifier determines the discrimination means automatically.
Distinction means
Sensed by light energy difference
like an ordinary mark sensor.
(When 2-point teaching is selected)
Output
Measures against Double Refraction
There are transparent films and transparent plastic objects that
change the direction of polarized light when it passes through
the transparent films and transparent plastic objects. This is
called double refraction. Using the optional rotary mounting
bracket (E39-L109), the sensor unit can be inclined 45 degrees
to take measures against double refraction.
(Example) Metal cylindrical object coated with transparent film
Metal cylindrical
object coated with
transparent film
Sensing head
45
˚
The object can be sensed smoothly when
the angle of the sensing head is either 0
˚
or 45˚.
A-198 Standard Photoelectric Sensors
Ordering Information
Sensors
Amplifier Units
Connection
method
Shape Model
E3X-NL
Pre-wired type E3X-NL11
33
32.2
59
Fiber Units
Sensor type Shape Sensing distance Fiber length Model
0.5 m E32-S15-1
10 ± 3 mm
1 m E32-S15-2
Reflective model
0.5 m E32-S15L-1
20 ± 7 mm
1 m E32-S15L-2
Accessories (Order Separately)
Mounting Brackets
Shape Model Quantity Remarks
Can be used with the fiber unit
E39-L109 1
E32-S15able in rotary angle (0°, 45°) for stable detection of transparent films
(double-refractive objects) on
glossy objects such as metal or
glass plates.
#
. Mounting bracket vari-
Red light
Covers
Shape Model Quantity Remarks
Attached to the amplifier unit
E39-G9 1
E3X-NL11. Please place an
order when the protective cover
is damaged or lost.
A-199E3X-NL
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