Fokussteg

Fokussteg is a German-language term used in technical contexts to denote a component, surface, or mechanism related to focusing in optical and imaging systems. The word combines fokus (focus) with steg (bridge or plate), so its literal translation is "focus bridge" or "focus plate." Because it is not standardized across disciplines, its exact meaning can vary by context.

In optics and photography, fokussteg commonly refers to a fixed or adjustable plate or reference surface within a camera, lens mount, or sensor assembly that establishes or stabilizes the focal plane. It may serve to align the image plane with the sensor and to reduce focus drift during focusing operations or when changing magnification.

In microscopy and laser systems, the term can denote a stage or support that positions focusing elements relative to the specimen or beam path. It can also describe calibration features or reference surfaces used during instrument setup to ensure accurate focusing across configurations.

Usage and variations: The term appears in German-language manuals, textbooks, and product documentation. Because terminology varies by manufacturer and field, users should consult the specific device’s documentation to confirm what fokussteg refers to in that context.

See also: focus, focal plane, optical alignment, stage, lens mount.