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	2 m long -0/+150 mm (80" -0/+6") - 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

CAD Files

Support Materials

Advanced Illumination - RL3940 Folded Beam Dark Field