The article discusses the development of the circuitry of acousto-optic (AO) laser displacement interferometers (LDI) and the values of resolution and speed of controlled displacements achieved by them. The issues of frequency matching of blocks of AO LDI are discussed: AO modulator. photodetector device (FDD) and frequency generator. The features of phototransformation of the FDD und... https://www.cosmeticssquadets.shop/product-category/bath-soak/