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.