High Process Reliability
Various functional principles ensure high process stability, even with demanding materials.
Design Variety
Numerous designs cover all application cases, especially harsh ambient conditions.
Different Light Sources
Sensors in the visible and invisible spectral range of light are available.
Contactless Detection
Contactless detection of different surface finishes, sizes and colors of objects.
Light Sources at a Glance
wenglor sensors and machine vision products cover different wavelength ranges that move in both the visible and invisible spectrum. The sensors are available in numerous designs and offer different functional principles, light spot sizes and light sources, including variants with laser or LED.
Light Sources and Their Effect on Different Surfaces and Materials
Choosing the right light source depends heavily on the properties of the surface to be measured and the material. For example, red light often penetrates deeper into an object, while blue-violet light penetrates less deeply due to its shorter wavelength. Depending on the material, this effect may be stronger or weaker, making other light sources more suitable for certain applications. The following summary provides an overview of which light source is optimal for different surfaces and materials. Feel free to contact us for individual advice!
Dark to Deep Black Surfaces
Difficulty: Dark surfaces absorb red light. This causes less light to be reflected and makes detection difficult.
Solution: Sensors with blue light are better suited because the light penetrates less deeply into the test object.
Solution: Sensors with blue light are better suited because the light penetrates less deeply into the test object.
Glossy, Reflective Surfaces
Difficulty: These surfaces tend to reflect light strongly, which can cause interference.
Solution: Blue light sensors are the better choice here. Red light sensors are also suitable for certain applications.
Solution: Blue light sensors are the better choice here. Red light sensors are also suitable for certain applications.
Matt or Rough Surfaces
Difficulty: Dull and rough surfaces scatter the light more, making detection difficult.
Solution: Red light sensors are ideal because, despite the light scattering, enough light returns to the sensor to detect the test object.
Solution: Red light sensors are ideal because, despite the light scattering, enough light returns to the sensor to detect the test object.
Organic Materials
Difficulty: Organic materials vary greatly in their properties.
Solution: Due to the lower absorption of blue light, blue light sensors are particularly suitable for dark materials.
Solution: Due to the lower absorption of blue light, blue light sensors are particularly suitable for dark materials.
Objects of Different Colors
Difficulty: Different colors have different effects on light reflection.
Solution: Red light sensors are best suited to detect objects of different colors.
Solution: Red light sensors are best suited to detect objects of different colors.
Glowing Surfaces
Difficulty: Glowing surfaces mainly emit red light, which can make detection difficult.
Solution: Blue laser is more suitable for glowing objects, as the light penetrates less deeply into the test object.
Solution: Blue laser is more suitable for glowing objects, as the light penetrates less deeply into the test object.
Transparent Materials
Difficulty: Transparent materials are often translucent because they reflect little light.
Solution: Red or blue light sensors are suitable for detecting transparent objects.
Solution: Red or blue light sensors are suitable for detecting transparent objects.
Sloped or Curved Surfaces
Difficulty: These surfaces reflect light in different directions, which can make it difficult to detect theme correctly.
Solution: Blue light sensors are best suited as they allow for more accurate detection on irregular surfaces.
Solution: Blue light sensors are best suited as they allow for more accurate detection on irregular surfaces.
Difference between LED Light and Laser Light
LED Light
- LED light is electromagnetic radiation with different wavelengths visible to the human eye
- Light spot diameter increases with increasing range
- Detection of larger objects thanks to larger light spot
- Visible light beam for easy installation and setup
Laser Light
- Laser light is created by amplifying light through stimulated emission
- Strongly focused light into one beam, no scattering over long distances
- Small light point for high precision and exact switching points
- Even the smallest parts can be detected thanks to the minimal light spot
- Visible light beam for easy installation and setup
Applications of Various Light Sources in Industry
Length and Width Measurement of Parquet Planks or Wooden Battens
Challenge: During parquet production, planks must be checked for their exact width so that they can be laid cleanly later. The surfaces can vary greatly in brightness and gloss.
Solution: Two opposing triangulation laser distance sensors with red light reliably measure the width of wood surfaces, regardless of brightness and degree of gloss.
Solution: Two opposing triangulation laser distance sensors with red light reliably measure the width of wood surfaces, regardless of brightness and degree of gloss.
Leading Edge Detection of Furniture Parts Made of Plank Materials
Application Control of Luminescent Glues in Furniture Production
Challenge: When manufacturing furniture, it is important to check that the glue has been applied completely. Since the glue must not be visible on the end product, it must be transparent.
Solution: A luminescence sensor reliably detects the transparent glue track offset with luminophores to ensure the quality of the furniture.
Solution: A luminescence sensor reliably detects the transparent glue track offset with luminophores to ensure the quality of the furniture.
Overview of Solutions
| Products | Light sources | Benefits | Product links | |
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Triangulation laser distance sensors | Laser (red, blue) |
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Time-of-flight laser distance sensors | Laser (red, infrared) |
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Fiber-optic sensors | Red light, blue light, pink light, infrared light |
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Contrast sensors | White light, laser (red) |
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Reflex sensors with background suppression | Red light, blue light, laser (red), infrared light |
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Reflex light barrier | Red light |
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Sensors for roller conveyor systems | Infrared, red light |
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Luminescence Sensors | UV light |
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Machine Vision
Products |
Light sources | Benefits | Product links | |
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2D/3D profile sensors | Laser (red, blue, UV/red) |
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Product Flyers for Download
P3 Series Product Flyer
(2 MB)
This document provides an overview of the P3 series laser distance sensors.
der wintec. Brochure
(1 MB)
This document contains the brochure on long-range laser distance sensors with wintec (wenglor interference-free technology).
P1XD Product Flyer
(902 KB)
This document provides an overview of the P1XD series fiber-optic amplifiers.
PNG//smart Product Flyer
(961 KB)
This document contains the PNG//smart sensors product flyer. Photoelectronic Next Generation stands for a new age of smart photoelectronic sensors.
Sensors for Roller Conveyor Systems Product Flyer
(6 MB)
This document contains the product flyer for the sensors for roller conveyor systems.
Light Curtains Product Flyer
(680 KB)
This document contains the product flyer for the light curtains for measuring tasks.
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