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Laser Sensors/Features/Detection configuration |
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Outline
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A laser sensor emits a beam of light from its transmitter. A reflective type photoelectric sensor is used to detect the light beam reflected from the target and the thrubeam type is used to measure the change in light quantity caused by the target crossing the beam.
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Features
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Non-contact detection |
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Non-contact detection eliminates damage either to the
target or sensor head, ensuring long service life and
maintenance-free operation.
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Detection of targets of virtually any material |
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Detection is based on the quantity of light received, or
the change in the quantity of reflected light. This
method allows detection of targets of diverse
materials.
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Long-detecting distance |
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Some laser sensors have a detecting distance of up to 1 m (3.3'), and some thrubeam types have a detecting distance up to 2 m (6.6').
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High response speed |
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The laser sensor is capable of a response
speed as high as 80 µs.
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Highly accurate detection |
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A unique optical system and a precision electronic
circuit allows highly accurate positioning and detection
of minute objects.
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Detection configuration and features |
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| Type |
Detection configuration |
Features |
Model
(KEYENCE products) |
| Thrubeam |
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Detection occurs when the target crosses the beam between transmitter and receiver.
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Long-detecting distance |
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Stable detection |
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Opaque objects are detectable regardless of shape, color or material |
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Powerful beam |
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LV,LX2,PZ-M,PZ2,PS,PW,PJ,PQ and FS,FS2 units |
| Retro-reflective |
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Detection occurs when the target crosses the beam between sensor head and reflector.
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Reflector allows for installation in a limited space |
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Simple wiring |
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Easily-adjustable optical axis |
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Opaque objects are detectable regardless of shape, color, or material |
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PZ-M,PZ2,PW and LV,FS units |
| Focused-beam reflective |
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Detection occurs when the beam spot is reflected by the target and received by the sensor.
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Minute objects detectable |
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Target markings detectable |
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Detection throuth narrow slits |
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Visible beam spot |
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LV and FS,FS2 units |
| Small-spot definite reflective |
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The transmitting and receiving portions are constructed at
an angle allowing detection within the limited area where the optical axes intersect.
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Effect of target background minimal |
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Low hysteresis |
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Slight height differences detectable |
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PS, and FS,FS2,LV units
(Internal lens units) |
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