An aplanatic surface is an optical surface that is specifically designed or shaped to minimize spherical aberration and coma. Spherical aberration is an optical aberration that occurs when light rays passing through different parts of a lens or...

In an optical system, the gradual reduction of image illuminance as the off-axis angle increases, resulting from limitations...

Optical artifacts refer to undesired or unintended effects that can occur in optical systems, such as microscopes, cameras,...

A formula indicating that, for an imaging lens system, the image brightness for off-axis points will fall off at a rate...

A positive lens located at or close to an intermediate image plane. The collector refracts off-axis light bundles, directing...

Aplanatic points refer to specific points in an optical system where certain aberrations, such as spherical aberration or...

Two lenses, separated by a distance equal to the sum of their focal lengths, and retroreflecting mirror assemblies, one of...

A compound lens combination whose astigmatic difference is zero for one or more off-axis zones in the image plane. In such a...

Specified curved optic intended for maximum collection of light, including off-axis rays, before leaving the exit aperture.

Seidel aberrations refer to a set of monochromatic aberrations in optical systems, named after the German mathematician and...

Lensless microscopy, also known as computational or holographic microscopy, is an imaging technique that captures and...

A computer-generated, phase-and-amplitude, off-axis hologram made by a multi-exposure technique that uses three computer...

Freeform mirrors refer to reflective optical components that deviate from traditional symmetric or rotationally symmetric...

Of all the rays passing through a lens from an off-axis object point to its corresponding image point, there is always one...

Off-axis paraboloid and ellipsoid mirrors are specialized optical components used in various optical systems, particularly...

A concave mirror that has the form of a paraboloid of revolution. The paraboloidal mirror may have only a portion of a...