RGBW and 4 Segments
With 4 individually controllable channels each, the two special ringlights simplify demanding inspection tasks - for example, the determination of 3D surface structures or specific color assessments. At the same time, they offer the familiar advantages of ring lights, such as the avoidance of hard object shadows or space-saving installation. Of course, accessories such as diffusers are also available for the 4-channel ringlights.
4 Segment Ringlight
In shape-from-shading, an object is illuminated from different directions and one image is taken in each case. Pure 3D images (heights and depths) are calculated from the different light and shadow information using software. Even the slightest deviations in height can be represented. Interference factors such as reflections, prints or different surface textures no longer have a relevant influence on the image and a time-consuming adjustment of the lighting situation can thus be shortened.
3D shape determination - examples Inspection task:
- Braille on printed surfaces
- Inspection of relief structures/ embossing on objects
- Inspection of highly reflective objects
Advantages of the 4 Segment Ringlight
Compared to an arrangement of four small beam illuminators, the 4-segment ring light has the advantage that no dark gaps can appear on the object as reflections. By varying the working distances, different inspection tasks can be performed - e.g. Braille on an otherwise smooth surface vs. inspecting an embossing in the bottom of a can.
RGBW Ringlight
The RGBW ringlights can be used to create contrasts for clear and easy color surface distinction when captured with a monochrome camera.
When the light color is similar to the object color, the light ist reflected: objects appear brighter in a monochrome camera image. When the color of the light and object are complementary, they are on opposite sites of the color wheel, the light is absorbed: objects appear dark
Advantages of RGBW ring light
A real advantage over other RGB lighting is the true 4000K white. In addition to the individual color channels in Red (625nm), Green (535nm) and Blue (465nm), White is available as a separate channel and can therefore not only be generated additively. This ensures a uniform spectral distribution for white and provides additional brightness.
The advantages of the stepless color selection are:
- Precise color control - detection of color deviations, color differences
- Fast adjustments to different color spaces possible
- True white can be controlled via its own channel - uniform spectral distribution and additional light intensity
Angled Ringlight
With its 45° angle, the angled ring light is particularly suitable for surface analysis. Punched and relief structures in particular can be inspected well.
The lighting is mounted at a short working distance from the object, while the camera is mounted at a greater distance to avoid direct reflections.
In this way, slanted edges are highlighted and slight deepenings are illuminated.
Short Wave Infrared
The new SWIR series belongs to the direct illuminators with a beam angle of approx. 45°.
The wide range of wavelengths from 1050 - 1550 nm allows a wide variety of inspection focal points to be set. The control diode in the light field indicates whether the illumination is in operation.
Due to the heat sink of the bar illumination, an optimal thermal management is ensured and thus the performance of the LED is maximized.
The SWIR series is suitable for:
- Differentiation of chemically different materials
- Transillumination of silicon or plastics
- Analysis of water content (e.g. bruises on fruit, condition of plants)