Lenses of other diameters are used with commonly available stepping rings. The unit is battery powered but also comes with an AC adapter. It provides uniform, interference and free illumination over a wide distance range. Its patented design enables users to adjust light output to match their specific applications. The R-90 can be quickly adjusted to change contrast, thereby eliminating glare without altering the stereo microscope optics.
Light output is brilliant and cool.
Shadows are completely eliminated. The ring's 8-point light sources are the polished ends of optical glass fibers which are mounted in tilting carriers. Tilting is accomplished via a sophisticated mechanical rotating disk which uniformly directs the motion of the 8 light sources to a single convergence point. The adjustable ring light has darkfield advantage as well as brightness, adjustability and light intensity, allowing it to be used in a broad variety of scientific, industrial and commercial applications. The Chiu R-90 is hard coat anodized, with rugged aluminum construction, polished stainless steel fittings and the finest quality optical glass.