ögonmikroskop

ögonmikroskop, or ocular microscope, refers to the eyepiece assembly of a microscope. It is the part that delivers the magnified image directly to the viewer's eye. In a typical compound microscope the ochlet comprises a lens or a set of lenses that further magnifies the view from the objective lens, allowing for a clearer, larger image. Common types of eyepieces include the single‑objective and the tricom, which offer different magnification ranges and fields of view.

The eyepiece contains a tube that positions the retina of the eye at a comfortable viewing distance while reducing the exit pupil to a suitable size for visual detection. Modern designs also integrate diopter adjustment rings, enabling users to fine‑tune the focus for bright‑field, dark‑field or other specialized microscopy modalities. Design variations such as ergonomic, shaped or flat optics reduce eye strain and improve ergonomics during extended observation.

The use of ochlet in microscopy dates back to the early 19th century, when the compound microscope began to replace simple observation tools. Pioneers such as Robert Hooke and later Antonie van Leeuwenhoek contributed to the evolution of eyepiece optics, driving the standardization of magnification steps. With the advent of high‑resolution imaging technology, oculars now integrate optical elements that improve resolution, contrast and brightness. In contemporary laboratories and classrooms, paraxial microscopes equipped with high‑power oculars are indispensable for cell biology, pathology, and materials science.