Study on the tool setting method of micro-milling tool based on in-line holography

Aiming at the various shortcomings of existing tool setting methods, this paper proposes a coaxial holographic tool setting method for tiny tools. Based on the research and analysis of the principle of holographic imaging and the key issues of holographic images, a set of holographic tool setting detection device for micro milling tool was built, and the micro milling tool measurement was carried out on the five-axis machining center using standard tools. experiment. Experimental results show that the tool setting device can efficiently perform tool setting detection of micro-milling tool. Compared with the measurement results of the high-precision external presetting instrument, the relative error of the contact tool setting instrument is 0.033%, and the relative error of the holographic tool setting prototype is 0.007%, which is more effective in realizing the tool setting of tiny tools. Detection. This result verifies the feasibility of the coaxial holographic tool setting method for micro tool, that is, holographic measurement can be used for high-precision tool setting of micro milling tool.

Поляризационно-чувствительные регистрирующие среды для голографии на базе красителя--флуорофора lucifer yellow

Polarization-sensitive hologram media based on matrices of polyvinyl pyrrolidone and gelatin are created, containing Lucifer Yellow and Coummarine 466. A multiplexed dynamic hologram of Denisyuk is recorded in a luminescent photoanisotropic gyrotropic material, using linearly polarized radiation of the laser LSR 405 NL-50 (= 405 nm). Using the method of polarization-luminescent holography, the photoanisotropic characteristics of the beam have been measured corresponding to the reconstructed imaginary image of the object field. The polarization spectra and photoluminescence intensity spectra of the reconstructed image were measured, depending on the composition of the recording medium. The possibility of multiplex recording has been demonstrated, as well as simultaneous observation of several images of an anisotropic-gyrotropic object encoded by different emission frequencies and / or polarization state. The combination of non-destructive polarization-luminescent holographic measurement method with other luminescent spectroscopic methods significantly expands the scope of this application by increasing dramatically the overall information content of the study.

Holographic measurement of surface acoustic wave parameters in crystals

The theoretical basis of a specialized technique for applying digital holographic interferometry to measure the parameters of surface acoustic waves is presented, a measuring system for visualization and quantitative analysis of the parameters of ultralow-amplitude high-frequency oscillations arising in electronic devices using surface acoustic waves is developed, and experimental results of the study of surface acoustic waves in crystals of lithium niobate are obtained. In this case, to ensure the possibility of recording precision double-exposure interferograms of high-frequency surface acoustic waves, a picosecond pulsed laser with two-stage frequency multiplication was used as a radiation source, and to increase the spatial resolution of the system with the possibility of observing a wide field of view, an adjustable optical zoom of the incoming image was applied to the matrix input (based on charge-coupled devices) of the recording camera and digital zoom was used for obtained interferogram. We achieved the measuring sensitivity of the surface acoustic waves amplitude and spatial-temporal resolution allowing visualization and measurement of surface acoustic waves with amplitudes of the order of 1 nm and frequencies of the order of 10 MHz, which is far beyond the capabilities of standard methods of holographic interferometry.