【摘要】 本文讨论了微颗粒同轴远场全息干涉条纹叶比度、颗粒尺寸范围和颗粒密度，以 及上述诸因素对全息记录景深的综合影响。分析了在实际应用中，平面波照明记录、 再现的条件下，远场数取值范围减小，因而可记录场深度减少的实验事实。出了提高 微颗粒场问轴全息测量景深的方法──分层记录微颗粒场同轴全息方法。最后，本文 给出了该方法对柴油机样机缸头燃油雾场所做的实际测量分析结果。更多还原

【Abstract】 The visibility, the range of particle size, the density of particle in on- line far field particle holography (OLFFPH), and the composite effect of these factors on the de pth of field are discussed in this paper. The experimen tal fact is analysed that the depth of field which can be recorded in OLFFPH decreases because the range of far field number decreases by means of plane wave in recording a nd reconstruction in practical application. A method is suggested to increase the depth of field measured in OLFFPH──recording Layer by layer (RLL). Finally, the field of oil spray in cylinder of text diesel engine is measured using RLL method. The analysis and result are given.更多还原