DEVICE FOR speckle - interferograms cylindrical cavity

摘要

Proposed as a utility model concerns a device to test and measurement equipment and may be used to assess the quality of manufacture of the cylindrical resonator frequency pressure sensors. The advantage of this device is to simplify the circuit and constructive solutions, and simplification of quotation adjusting operations. This is achieved by the fact that the device for producing the speckle interferograms cylindrical resonators comprises a source of optical coherent radiation, a collimator optically coupled between a reference and subject tracts with formers of light, the conical ring mirror backlight cavity mount, digital video camera electrically connected with monitor via the PC. Also it achieved by the fact that the support path is formed as a mirror surface-coated and mounted in a fixture that allows the mirror to rotate in the horizontal and vertical planes. Also it achieved by the fact that the collimator is designed as a short-and a biconcave lens and a diffuse glass fastened in a fixture, which allows to move the glass diffusion between the collimator lens along an optical axis. The proposed as a useful model device for obtaining speckle interferograms cylindrical resonators simplifies circuit design and hence and structure of the apparatus, and increases to 25-30% of the signal / noise ratio. The result is increased by 25-30% contrast speckle interferogram cylindrical resonators. The claimed device allows to simplify the alignment procedure and the adjustment device. Alignment is to ensure perpendicularity to each other the optical axes of the object and reference paths with an accuracy of 1 °, and combining them in a horizontal plane by adjusting the position of reflecting mirror in the reference path.