Glossary

The coaxial light of S7 / OPMI PROergo, S100 / OPMI pico and S100 / OPMI pico in combination with MORA interface provides a shadow free light for homogenous illumination even in cavities or root canals. With coaxial light fine details are visible (1). Diffuse light (2) or oblique light (3) produce shadows. Root canals or fractures in shadowy areas might be missed.

The lens collects the image information from the object. The left and right light path in the surgical microscope view different angles of the object and thus create the impression of a three-dimensional image.

The magnification changer minifies or magnifies the image depending on the selected position. The tube lens creates an intermediate image of the object, which is projected into the eye magnified with the eyepiece.

The prisms in the tube rotate the image the right way and allow for adjusting the pupil distance, so that the pupils of the viewer match the surgical microscope's exit pupils.

The magnification with which we can see a structure in the eyepiece is the end magnification. It is the end result of the various optical components of a surgical microscope. It can be calculated easily with the following formula:

Unlike an objective lens, the varioscope of S7 / OPMI PROergo can be set to different focusing ranges. That accommodates a working distance of between 200 and 415mm. OPMI PROergo can then be positioned at varying distances within this range from the treatment area. Unlike a surgical microscope with a fixed focal distance lens (like S100 / OPMI pico and S100 / OPMI pico in combination with MORA interface), it is not necessary to raise or lower OPMI PROergo to focus it.

How is that possible? The lens system of a varioscope is composed of two lens groups. To focus at a selected working distance, the upper lens group is repositioned along the optical axis. The motorized varioscope of OPMI PROergo can be controlled by pressing a button on the multifunctional handgrip.

When working with a surgical microscope on a patient, a certain distance is required between the object and the front lens of the surgical microscope. That is what is referred to as the working distance. The working distance is the distance between the front lens of the surgical microscope and the object.

The closer the working distance, the higher the end magnification. The longer the working distance, the lower the end magnification.

For S100 / OPMI pico and S100 / OPMI pico in combination with MORA interface lenses with 200, 250 or 300 mm working distance are available. These are lenses with a fixed focal length. The varioscope of the OPMI PROergo accommodates a working distance of between 200 and 415mm. This allows the dentist to adjust the surgical microscope to suit his or her individual ergonomic needs.