Now showing items 1-10 of 11
Circle of holography : digital in-line holography for imaging, microscopy and measurement
Gabor proposed the concept of holography for wavefront reconstruction. The advent of the laser enabled Leith et al. to develop this concept into a technology with off-axis holography. Advances in computational methods and ...
Double exposure time averaged in-line digital holography
Theory, analysis and applications of digital in-line holography are presented for metrological applications. Particularly time averaged in-line digital holography is explored for dynamic characterization of membranes and ...
Development of simple user-friendly commercial digital holographic microscope
We report the development of a simple commercial digital holographic microscope. The hologram is recorded using a CCD sensor and numerically reconstructed to provide quantitative analysis of the object. The laser source ...
Characterisation of laser marks using digital holographic microscopy
The inspection and characterisation of laser marks using digital holographic microscopy (DHM) is presented in this paper. A DHM system in transmission mode was designed and the reconstruction algorithm for this configuration ...
Amplitude and phase analysis in digital dynamic holography
Lensless in-line digital holographic interferometry has the potential for vibration analysis of objects smaller than 5 mm in diameter. This is particularly useful for dynamic characterization of microelectromechanical ...
Vibration analysis of membrane by time average in-line digital holographic interferometry
In this paper, in-line digital holography is combined with time average method and applied for vibration analysis of an aluminum membrane. The numerically reconstructed wave from time average holograms contains information ...
Time-averaged in-line digital holographic interferometry for vibration analysis
Time-averaged in-line digital holography is applied for vibration analysis. In particular, by use of a double-exposure approach, simultaneous determination of vibration mode shape and mean static state deformation during ...
Dynamic characterization of MEMS diaphragm using time averaged in-line digital holography
In this paper dynamic characterization of a MEMS diaphragm is investigated using lens-less time averaged in-line digital holography. The analysis and capability of the numerically reconstructed amplitude and phase information ...
Digital holography a new paradigm for imaging microscopy and measurement
Digital Holography has introduced a new revolution to the field of holography. Despite the shortcoming of low resolution of the CCD camera in comparison to the photographic film, the ability to instantaneously observe the ...
Digital holography for MEMS application
Studies on digital holographic microscopy for full field high resolution 3-D profiling of MEMS and micro-devices are presented. Applications for thin film thickness measurement and studies on a MEMS accelerometer are presented.