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The RL3940 is characterized as a Folded Beam Dark Field ring light.

Precisely aimed LEDs, along with an aluminum beam folder, provide a specific and repeatable light pattern on the imaging plane.

The RL3940 is characterized as a Folded Beam Dark Field ring light.

Precisely aimed LEDs, along with an aluminum beam folder, provide a specific and repeatable light pattern on the imaging plane.

The light provides up to 11kLux at a working distance of .6” (15mm).

The RL3940 is available in a wide range of wavelengths from UV to IR.

The folded-beam configuration provides dark field illumination in a compact 3.9” (100mm) housing.

The housing’s large inner diameter can accommodate lenses up to 55mm in diameter.

The light can also be ordered with an optional mounting ring.

Electrical Specifications
Color
24V Current
All Other Controls
625, 660, 880
0.24A
0.18A Max
395, 470, 520, WHI
0.16A
0.12A Max
Normal Operating Temperature
0 - 60°C
Weight
246.8g (8.71 oz) for standard mounting option
Standard Cable Information
Up to 2 meters (80") long - 105°C rated PVC jacket, foil shield with drain.
Photobiological Risk Factor
Exempt Applicable Wavelengths: 880
Group 1 (Low-Risk) Applicable Wavelengths: 470, 520, 625, 660, WHI
Group 2 (Moderate-Risk) Applicable Wavelengths: 395
Compliance
CE, RoHS, IEC 62471
IP Rating
Not Rated
Lumen Maintenance
L70 = 50,000 Hours