Editing Goniometer (section)

===Positioning===
{{Main|Positioning goniometer}}
[[File:Positioning goniometer stage.jpg|thumb|A miniature electro-mechanical goniometer stage. This type of stage is used primarily in the field of lasers and optics.]]
A positioning goniometer or goniometric stage is a device that rotates an object precisely about a fixed axis in space. It is similar to a [[linear stage]]—however, rather than move linearly relative to its base, the stage platform rotates partially about a fixed axis above the mounting surface of the platform. Positioning goniometers typically use a [[worm drive]] with a partial worm wheel fixed to the underside of the stage platform meshing with a worm in the base. The worm gear may be rotated manually, or by a motor in automated positioning systems.