Reibold R
Ultrasound Med Biol. 1982;8(2):191-7. doi: 10.1016/0301-5629(82)90098-9.
A system using a water-immersed balance with laser interferometer for radiation force measurements has been developed which is capable of determining powers in the range of a few microwatts up to about 100 mW. High consistency of measuring values and low background noise levels are achieved by compensating thermal and atmospheric pressure drifts, shielding the balance system from convection currents and effective isolation from building vibrations. The sensitivity ascertained is 104 micrometer/mW or, expressed as interferometer steps (IS), 8740 IS/mW. The standard deviation for a power output of 100 mu W is less than 1% ; it increases to 11% for 3.5 mu W, the lowest value measured.
已开发出一种使用带激光干涉仪的水浸天平进行辐射力测量的系统，该系统能够测定几微瓦至约100毫瓦范围内的功率。通过补偿热漂移和大气压力漂移、使天平系统免受对流影响以及有效隔离建筑物振动，实现了测量值的高度一致性和低背景噪声水平。确定的灵敏度为104微米/毫瓦，或以干涉仪步长（IS）表示为8740 IS/毫瓦。100微瓦功率输出的标准偏差小于1%；对于测量的最低值3.5微瓦，标准偏差增加到11%。
