Development of a simple user-friendly commercial digital holographic microscope

Abstract

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 is coupled via fibre optics and the opto-mechanical setup is flexible and customizable for either the reflection or transmission mode. The user-friendly software allows live reconstruction, simultaneously providing both the amplitude and phase images. System performance is improved with phase unwrapping and interferometric comparison. Additional features include various image enhancements, cross-sectional and line profiling, measurement and data analysis tools for quantitative 3D imaging and surface topography measurement. The performance of the product is tested on different micro devices, glass and silicon surfaces.

Characterisation of laser marks using digital holographic microscopy

“…We have developed the DHM system in both the transmission and reflection modes [13]. In the present study of the laser marks on glass substrates, the DHM system in transmission mode was used.…”

Numerical reconstruction of digital holograms for conventional 3D display

“…By using digital sensors we can talk about digital holography [2]. With digital holography both macroscopic and microscopic real-world 3D objects can be recorded [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The first commercial products, which are using digital holography, are from the field of 3D microscopy.…”

Three dimensional digital holographic profiling of micro-fibers

“…In this technique, a hologram of a scene is recorded digitally and numerical processing yields reconstructions focused at different depths of the scene. By using an appropriate recording setup, the scene can be magnified enabling digital holographic microscopy measurements [3,4].…”