Folded Beam Dark Field

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.