Sagittal plane (optics)
The sagittal plane (from Latin sagitta , arrow) is an auxiliary plane in geometric optics for calculating and assessing the properties of an imaging system. For each object point, it is the plane that contains the main ray of the beam and is perpendicular to its meridional plane .
For an object point that lies on the optical axis, all planes that contain the main ray form a family of meridional planes . In this case there is no sagittal plane.
- Eugene Hecht: Optics . 4th ed. Addison-Wesley, an Francisco 2002, ISBN 978-0-321-18878-6 (EA Reading, Mass. 1982).
- German translation: optics . 5th edition Oldenbourg, Munich 2009, ISBN 978-3-486-58861-3 (EA Bonn 1991).