Related Experiment Video
Updated: Jun 16, 2026

Quantifying Microorganisms at Low Concentrations Using Digital Holographic Microscopy (DHM)
Published on: November 1, 2017
Signal-to-noise ratio and smallest detectable vibration amplitude in frequency-translated holography: an analysis
Abstract:
The theoretical and experimental analysis of SNR in frequency-translated holography that is applied to the detection of small vibration amplitude is presented in this paper. The feature of the experiments lies on the usage of acoustic surface waves as the vibrating test object, since the acoustic surface waves give the reliable vibration amplitude and the easiness of the measurement of SNR. Furthermore the detectable smallest amplitude is estimated as 2.7 x 10(-4) lambda, which is several tenths smaller than the previously presented estimations, and the dependences of the detectable smallest vibration amplitude on the experimental arrangements are also made clear.
Related Concept Videos
Difference from Background: Limit of Detection
The LOD indicates the presence or absence...
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
Aliasing
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration
According to Hooke's law, the vibrational frequency is directly proportional to the...
¹H NMR: Interpreting Distorted and Overlapping Signals
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...

