DCM Sistemes DKL5650B Darkfield Ring Light

Wavelength is selectable, and the choice changes what the light brings out. The unit is offered as W00 white plus monochromatic 470 nm blue, 525 nm green, 630 nm red, 850 nm IR and 400 nm UV. A monochromatic option paired with a matching bandpass filter on the camera lets you suppress ambient light and lift contrast on a specific defect type, while white is the general-purpose, colour-faithful choice. As a general rule in machine-vision lighting, shorter wavelengths tend to emphasise fine surface texture and longer wavelengths interact differently with certain surface colours, so the available band can be matched to the target defect. Because the frame geometry is fixed, the practical positioning variable an installer controls is standoff: the working distance and the height of the ring above the part set the effective grazing angle, so the light is dialled in by moving it up or down until the defect of interest pops and the good surface stays dark.

Electrically the DKL5650B runs on 24 VDC and supports four operating modes: Continuous (C), Powered (P), Strobe (S) and DCM's iBlueDrive (i). In continuous mode it needs no external controller and can be driven directly from a 24 VDC supply (regulated to +/-3%), which is the simplest way to deploy it for steady-state inspection. For external strobing - pulsing the light in sync with the camera to freeze fast-moving parts - a VST-series strobe controller is required, and peak instantaneous consumption can reach about 4390 mA in strobe mode, so the supply and wiring must be sized for that draw. iBlueDrive mode relaxes the supply tolerance to +/-8% and uses a 3-pole aerial connector (150 mm); in the standard C/P/S modes the unit terminates in 2-pole flying leads (1800 mm), which an installer wires straight into the power source or controller. The thin 10 mm profile and ring form factor make it straightforward to mount over a conveyor or fixture, with the camera looking down through the open centre.