High-Performance Line Light
What is not sufficiently illuminated cannot be optimally captured – even by the best camera. This old machine vision principle applies particularly to line-scan camera applications and thus also to MSTVision’s photometric stereo system. To meet the high demands for speed and light intensity, the company has therefore developed its own high-performance line light specifically for photometric stereo. „Our line illumination module, the Photometric Stereo Line Light MST-PSL, features integrated LED drivers and four directional channels through which light is emitted at defined oblique angles,“ explains Gräff. „Compared to other systems, this arrangement offers clear advantages in terms of irradiance and angular precision.“
In a typical setup, the MST-PSL operates with an average tilt angle of 35° and a lateral emission angle of the individual LEDs of 35° ± 8°. The individual LEDs are focused in such a way that, in strobe operation, irradiance levels of up to 6 kW/m² can be achieved, with a depth measurement range of 40 to 60mm below the system. The lighting concept is based on an integrated illumination unit with four lighting directions. This simplifies mechanical integration at a constant working distance and enables a particularly compact design that requires less than 300mm in the direction of motion. In line direction, standardised inspection widths of up to approximately 1,400mm are available. Custom lengths are also possible upon request.
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