Modern optical variosystems include lenses with a fixed and tunable focal length, which can also move relative to each other according to a certain law. The method of dimensional synthesis of the variosystems converting incoherent radiation and laser Gaussian beams is considered. Examples of the calculation of optical variosystems are presented.

In this paper, a modeling of a laser optical system for heating samples in a high-pressure cell was performed, in which the laser heating system and the optical system for measuring the temperature distribution are separated. It is shown that a setup with separate heating and temperature measurement systems allows one to: (i) adjust the optical temperature measurement system regardless of the alignment of the IR laser; (ii) obtain the optimal spot of the IR laser beam and control the beam in the future using a movable lens and an acousto-optical deflector.

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