SU643756A1 - Device for visualization of acoustic fields - Google Patents

Description

The invention relates to the measurement technique and can be used on the day of recording sound drinks during experiments on physical applied acoustics processes.

A device is known for the day-to-day viaugaza- tion of sound drinkers, which contains an ultrasonic transducer with an oscillator of electrical oscillations, a shadow optical device and a visualizing circular raster placed in the output focus of the shadow op- eous instrument l.

However, this device has a low sensitivity due to the lack of adjusting the image contrast.

The circuit of the invention is an increase in the sensitization of the device for the visualization of sound and drink.

This is achieved by the fact that the device is supplied with a constant voltage source with adjustable voltage.

and an interfacial interference filter including a crossed driver and analyzer and a bentrelumfering pump interposed between them with a circular pattern, made in the form of transparent cathodic concentric electrodes, each of which is connected to a constant source, and each has a fixed concentric electrode. the radii (d) of adjacent genera are determined by the ratio

J p And d-F-dgde F-focal distance of the shadow device;

I is the average wavelength of the spectrum of the light source of the shadow device;

L - the length of the sound wave in the environment.

The drawing is a block diagram of the device.

The device for visualizing sound waves contains an oscillator 1 of electrically oscillating with electroacoustic transducer 2, a shadow optical device 3 including a claptimator and a receiving part 4, a source 5 of light. The output focal pposkosti shadow ustanovpen interference optical device (filter -by 5fiaatsionny vkshochayugtsy crossed polarizer 6 and 7 anashshator, raspoprzhennuyu therebetween tsvugeucheprepomd guide plate 8 with the deposited. It a circular pattern, vgpolnenn M in the form of transparent electrodes 9 kontsentrichesShH ring, each of KOTopbFX through deTell 10 is connected to the poshishy voltage source 11, as well as the circular diaphragm 12. On the opposite side, one common spectrometer is found 13.

The luminous flux from the source 5 of the light, passing through the shadow shadow controller. boron 3, the sound field in the environment and the receiving part 4 falls on the polarizer 6.

As a result of diffraction of light by sound waves in the focal plane of the receiving part, diffraction spectra are formed.

The zero-order spectrum shields with the diaphragm 12, and the light from the diffraction spectra of other orders falls on the corresponding concentric electrolyte 9 of the birefringent plasmaTKHbj 8. The double flux-refraction in the plate provides, at the output of the anapraator 7, the light intensity maxima, downloaded the dgga violet beams, then blue and so on further, when changing the voltage on any of the lance concentric electrodes

9 using divider adjustment 10.

In this case, with the interference of diffraction spectra on screen 14, a luminous image of the sound field is observed, which is characterized by high color contrast and high sensitivity to color change in the image under diffuse sound vibrations.

The proposed device provides povpiene sensitivity to color change in the image, high color contrast and obtaining detailed information when studying complex sound drinks.

Claims (1)

1. USSR author's certificate N94985O6, cl. Q O1 H 9 / OO, 1973. S. / j / 5 f .T one