title: Paraxial analysis of four-component zoom lens with fixed distance between focal points.
abstract: Zoom lenses with a fixed distance between focal points are analyzed. Formulas are derived for the primary design of basic parameters of a four-component zoom lens. It is also demonstrated that a three-component zoom lens can be analyzed using derived formulas. Zoom lenses with such a design can be used in a 4-f system with variable magnification or as a part of a double side telecentric lenses with variable magnification.
authors.affiliation: Czech Technical University in Prague, Faculty of Civil Engineering, Department of Physics, Prague, Czech Republic.
authors.forename: Antonin
authors.initials: A
authors.lastname: Miks
authors.forename: Jiri
authors.initials: J
authors.lastname: Novak