Abstract
This report compares the measurement accuracy of off-axis holographic technique with that of in-line holographic one, in digital holographic particle measurement. Off-axis holographic can separately reconstruct a real image a virtual image and offset to easily measure the object position in 3-D space with accuracy. It is seen in numerical performance tests that the object position can be more accurately measured with off-axis technique than in-line one, and the measurement error is affected by increasing object size and object number density.
