This page is optimized for large screens. Zooming may cause some display problems.
glossary
- Lens: optical component with two refractive surfaces axially symmetrical for redirecting the light in a controlled manner
- Refracting surface: surface interfacing two transparent media with different refraction indexes
- Clear aperture: aperture diameter of an optical system
- Refraction index: for a transparent medium, ratio between the light speed in the air and the light speed in the medium ; for a reflective surface in the air or vacuum, the refraction index is « - 1 »
- Object: element (point, line, plane, or whatever,…) of the space linked to another element called image in a way that rays coming from the object and transmitted by an optical system focus on the image ; object and image are said to be conjugate by the optical system
- Apex: top of a surface
- Longitudinal spherical aberration: algebraic distance from the paraxial image to the marginal image obtained with rays propagating through an optical system from an on-axis point
- Transversal spherical aberration: diameter of the spot formed in the paraxial image plane with rays propagating through an optical system and coming from an on-axis object