An optical system under investigation is called schema in terms of rezonator. The schema consists of several optical components, ranges between them, and some helper objects. They all are called elements.

Schemas are saved in files with the extension .REZ.

You can calculate propagation of the Gaussian beam through an open optical system and a stable resonator. In the current version, rezonator can calculate only planar optical systems. ‘Planar’ means such a system where all breaks of the optical axis (reflections, refractions) do occur on the same plane. This plane is called the tangential plane.

An open optical system is called a single-pass system (SP) in rezonator. For example, it is a telescope, microscope, beam expander, and so on. You have to set-up an input beam, and the software can compute how this beam propagates through all elements of the schema.


A resonator can be a standing wave resonator (SW) or ring resonator (RR). With the help of the software, you can conceive which value of element parameters brings resonator to a stable operation regime and which properties the self-consistent Gaussian beam has inside the resonator.


You can change the type of schema through the Trip-type dialog at any time. The status bar of the project window displays an icon denoting selected schema type. The icon pointed as 1 on the screenshot below.

Each time you modify any schema properties or elements’ parameters, rezonator computes a value of stability parameter (for SW and RR). When schema stability gets broken, then the stability icon (shown as 2 on the screenshot below) gets highlighted in red color. Calculation of beam properties for unstable resonators is not supported.