Device and method for measuring electrostriction coefficient by multi-beam laser heterodyne method
A laser heterodyne and multi-beam technology, applied in the field of measurement, can solve problems such as unsatisfactory measurement accuracy
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specific Embodiment approach 1
[0022] Specific implementation mode one: see figure 1 Describe the present embodiment, the device of multi-beam laser heterodyne measurement electrostriction coefficient described in the present embodiment is composed of Ho solid-state laser 2, quarter-wave plate 12, vibrating mirror 13, first plane mirror 3, polarizer Beam splitter PBS11, converging lens 10, thin glass plate 9, second plane mirror 6, piezoelectric ceramic tube to be tested 7, two-dimensional adjustment frame 8, high voltage power supply, photodetector 4 and signal processing system 5;
[0023] The linearly polarized light emitted by the Ho solid-state laser 2 is reflected by the first plane reflector 3 and then enters the polarizing beam splitter PBS11, and the light beam reflected by the polarizing beam splitting mirror PBS11 is transmitted by the quarter-wave plate 12 and then enters the vibrating beam. The light receiving surface of the mirror 13, the light beam reflected by the oscillating mirror 13 is tr...
specific Embodiment approach 2
[0027] Specific embodiment two: this embodiment is to further limit the structure of the signal processing system 5 in the device for measuring the electrostrictive coefficient by the multi-beam laser heterodyne method described in the specific embodiment one, the signal processing system in the present embodiment 5 is composed of a filter circuit 5-1, a preamplifier circuit 5-2, an analog-to-digital conversion circuit A / D and a control circuit DSP, and the filter circuit 5-1 filters the received electrical signal output by the photodetector 4 Send to preamplifier circuit 5-2 afterwards, the signal output after described preamplifier circuit 5-2 amplifies to analog-to-digital conversion circuit A / D, and described analog-to-digital conversion circuit A / D sends the signal after conversion To the control circuit DSP.
specific Embodiment approach 3
[0028] Specific embodiment three: what this embodiment describes is the method for measuring the electrostrictive coefficient by means of the multi-beam laser heterodyne method described in the specific embodiment one or two to measure the electrostrictive coefficient, and the process of the method is:
[0029] First, by adjusting the two-dimensional adjustment frame 8, the reflection surface of the second flat mirror 6 fixedly connected with the piezoelectric ceramic tube 7 to be tested is parallel to the thin glass plate 9, and the height between the two plates is equal, and the first The distance d between the reflective surface of the two plane mirrors 6 and the thin glass plate 9 is 20mm;
[0030] Then, connect the two electrode output terminals of the high-voltage power supply to the inner surface and the outer surface of the piezoelectric ceramic tube 7 to be measured through the electrodes, and turn on the driving power of the vibrating mirror 13 to make the vibrating ...
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