A laser monitor with two image acquisition channels based on two brightness amplifiers and two digital cameras is presented. The laser monitor makes it possible to visualize the surface of metal nanopowders during combustion simultaneously in two regions of the sample or in one region with different magnifications. The delay between the radiation pulses of the brightness amplifiers is set in such a way that the radiation of one brightness amplifier does not affect the image formed by the other brightness amplifier. The proposed experimental technique makes it possible to study the surface of samples of powder materials during high-temperature combustion, accompanied by intense glowing and scattering of combustion products. The use of two-channel visualization makes it possible to study the surface of a burning sample in more detail, in particular, to study the inhomogeneity of the combustion process.

The paper presents a laser monitor with independent illumination and a mirror imaging scheme based on an active medium on copper bromide vapors, which allows visualizing the surface of metal nanopowders during combustion. Independent laser illumination using a second active element based on copper bromide vapors can significantly increase the contrast of images compared to a laser monitor based on a single active element. This feature is advantageous when examining surfaces of materials with low light reflection. The paper also demonstrates the realization of a two-channel pulse generator for pumping active elements on copper bromide vapors based on one high-voltage power supply.