Visualization of acoustic surface waves in the lithium niobate crystal on a frequency of 17 MHz under thermal expansion of the sample.

Wave length — 0.532 µm, exposure time — 60 ps; sample surface area size — 3.84 by 3.84 mm
Interferograms obtained by means of comparing a hologram of the stall position with a series of holograms recorded consequently after loading. Time of holographing is provided under respective pictures (HH:MM:SS).

No. 1 No. 2 No. 3 No. 4
21:33:16 21:33:36 21:33:54 21:34:32
No. 5 No. 6 No. 7 No. 8
21:34:52 21:35:06 21:35:40 21:36:24