The paper considers an optical laser-free system for express analysis of vibration state, which includes a dedicated backlight and a videocamera of vision system, which is a displacement sensor. The problem of determining the degree of mutual influence of the reflecting properties of the surface and the spectral composition of the radiation of the light source on the noise level of the CCD matrix is ​​solved. Using dispersion analysis of the results of a field experiment, it was determined that the spectral composition of the backlight is the most significant factor; the best combinations of parameters were identified. Comparison of the noise level with the real vibration signal showed the crucial role of the selection of combinations of the backlight and the type of the reflecting surface.

Keywords: noise CCD, dispersion analysis, vision system, vibration control, optical measurement, reflective properties, spectral composition, backlight, vibration