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1 实验原理大功率声波在液体中传播会伴有热效应、声空化效应产生.在声强度大的地方,热效应、空化效应相对较强.超声这种效应,在进行化学反应的试剂中会起到加速反应的作用.如果在像纸显影液中加入超声,这种机理也会在像纸显影过程中发生.对均匀曝光的洗像纸,把其浸入有超声存在的显影液中显影,则像纸上化学颗粒与显影液的化学反应快慢会随着声场分布不同而不同:在声强大的地方,反应强烈,像纸很快显影变黑;在声强小的地方,反应较慢,像纸相对较亮.利用这个原理,可以纪录显影液中声场的相对空间分布.当显影液非常
1 Experimental principle High-power sound wave propagation in the liquid will be accompanied by a thermal effect, the acoustic cavitation effect generated in the place of large sound intensity, thermal effect, cavitation effect is relatively strong.This effect of ultrasound in the chemical reaction reagents will Play a role in accelerating the reaction.If ultrasound is added to the developer like paper, this mechanism also occurs during development of the image.For a uniformly exposed imager, the developer is immersed in a developing solution that is present in the ultrasound, The chemical reaction speed between the chemical particles on the paper and the developing solution will vary according to the distribution of the sound field: in the place where the sound is strong, the reaction is intense, and the paper like the image develops black immediately; in the place where the sound intensity is small, the reaction is slow, Relatively bright like paper.Using this principle, you can record the relative spatial distribution of the sound field in the developer.When the developer is very