LUMIMAX · DARK FIELD
DFL50 Dark Field Ring Light
LMX-DFL50Low-angle dark field ring light with moderate performance for surface defects, edges and embossing - 50mm inner diameter.
- Light colour | wavelength
- 470 to 625 nm, white
- Power-LED
- SMD LEDs
- Light field size
- 50

About the LMX-DFL50
The DFL50 is the smallest LUMIMAX ring-shaped dark field light, with a 50mm light area diameter. Radial illumination runs almost parallel to the object plane, so a flat surface throws the light away from the camera and only features that deflect the rays appear bright. That regime shows engraving, embossing, stamped numbers, dot-peened and laser-cut codes, edges and cavities in high contrast, including on strongly reflective parts.
Six colours are orderable: blue at 470nm, green at 528nm, red at 625nm, white at 6000K, ultraviolet at 400nm and infrared at 870nm, in continuous and switch or flash operation. Strobe brightness reaches up to 25 times that of the continuous variants.
A representative white flash article gives 7 W/m2 at 0.2m from SMD LEDs, on 0.3A at 24 V DC and 120W at the light area with the external FLC2 controller. Flash times of 10 to 100us, 20 to 220us or 50 to 750us run at 100Hz, 35Hz or 10Hz, full output within 3us, brightness set by potentiometer or analogue input. The housing is 85mm by 26mm and 210g, rated IP40.

Specifications
Operation
- Operating mode (varies by part number)
- Continuous and switching mode | Strobe mode
- controller (varies by part number)
- External illumination controller PLC2 (101.0029.00) available as accessory | External strobe controller series FLC2 (102.0030.xx) available as accessory
Environment
- Ingress protection
- IP40
- Allowed ambient temperature
- 5 to 45 °C, non-condensing
- Risk Group
- 0
Mechanical
- Dimensions (Ø x h in mm)
- 85 x 26 (Ø = 125 mm with cable incl. bending radius)
- Material housing | window
- Aluminium, anodised | PMMA
Electrical
- Operating voltage
- 19 to 30 V DC wide-range voltage input *
- Maximum current consumption (varies by part number)
- 0.1 A * | 0.3 A * | 0.5 A *
- Maximum electrical power at light field (varies by part number)
- 109 W * | 120 W* | 2 W* | 217 W* | 4 W * | 98 W *
- Electrical connection (varies by part number)
- 1.5 m cable with M16 6-pin plug for connection to PLC2 controller | 1.5 m cable with M16 8-pin plug for connection to FLC2 controller series
- Brightness control via potentiometer
- 0 % (left stop) to 100 % (right stop) brightness # Note: automatic deactivation at VC > 1 V DC *
- Brightness control via analogue VC input
- VC = 2 to 10 V DC (0 % to 100 % brightness) # Note: Turn potentiometer to left stop *
- TTL-Trigger
- High level = 3 to 30 V DC *
- SPS-Trigger
- High level = 15 to 30 V DC *
- Trigger slope
- Rising slope *
- Switch-on delay
- 100 % brightness within a maximum of 3 µs
- Flash duration 1
- 10 to 100 µs | 20 to 220 µs |50 to 750 µs *
- Flash frequency
- 100 Hz | 35 Hz | 10 Hz *
- TTL switching input
- High level = 3 to 30 V DC *
- PLC switching input
- High level = 15 to 30 V DC *
- Switching mode
- Switching time follows the switching signal # Connect + ON / OFF and GND ON / OFF *
- Continuous mode
- Assign + ON / OFF permanently with high signal, e. g. by applying to operating voltage # Connect GND ON / OFF *
Optical
- Light field size (Ø in mm)
- 50
- Light colour | wavelength (varies by part number)
- Blue | 470 nm | Green | 528 nm | Red | 625 nm | White | 6000 K
- Light guidance
- Radial, directional
- Power-LED
- SMD LEDs
- Illuminance at 0 mm
- continuous 2143–30168 lx · strobe 37154–369558 lx
- Illuminance at 50 mm
- continuous 594–3275 lx · strobe 10176–68355 lx
- Illuminance at 100 mm
- continuous 139–454 lx · strobe 1833–9476 lx
- Illuminance at 200 mm
- continuous 34–105 lx · strobe 498–2200 lx
- Irradiance at 0 mm
- continuous 12.1–54.4 W/m² · strobe 297.6–666.4 W/m²
- Irradiance at 50 mm
- continuous 3.4–11 W/m² · strobe 56.4–229.6 W/m²
- Irradiance at 100 mm
- continuous 0.7–1.6 W/m² · strobe 8.3–31.9 W/m²
- Irradiance at 200 mm
- continuous 1 W/m² · strobe 2.1–7.3 W/m²
General
- Country of origin
- Federal Republic of Germany
- Weight (kg)
- 0.21
Media
Request a quote or talk to an applications engineer
Tell us about your application and we will confirm the right product and configuration, or specify a variant outside the catalogue.

