Oblique illumination in self-referencing digital holographic microscopy and its applications

Ganjkhani, Yasaman; Calabuig, Alejandro; Pedrini, Giancarlo; Moradi, Ali‐Reza

doi:10.1117/12.2592613

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…Furthermore, the setup has the possibility to be combined with the techniques such as microsphere-assisted microscopy and structure illumination microscopy towards superresolution DHM. 61,62 A UV light source (Analytik Jena Hand-held UV lamp, 254-365 nm Wavelength, 230 V AC , 60 Hz) along with a collimating lens L (focal length = 10.3 mm) and the steering mirrors M 2 and M 3 are used to provide a uniform UV irradiation on the samples. During the UV light irradiation, the DHM laser is blocked by the shutter Sh.…”

Section: Methodsmentioning

confidence: 99%

“…It is remarkable that the presented SR-DHM scheme, which is built on an up-right microscope, can be similarly used on an inverted microscope. Furthermore, the setup has the possibility to be combined with the techniques such as microsphere-assisted microscopy and structure illumination microscopy toward super-resolution DHM 59,60 . A UV light source (Analytik Jena Hand-held UV lamp, 254-365 nm Wavelength, 230 V AC , 60 Hz) along with a collimating lens L (focal length = 10.3 mm) and the steering mirrors M 2 and M 3 are used to provide a uniform UV irradiation on the samples.…”

Section: Methodsmentioning

confidence: 99%

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Digital holographic microscopy of spiropyran‐based dynamic materials

Jamali,

Rad,

Razaghi

et al. 2023

Journal of Microscopy

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Spiropyran (SP)‐based dynamic materials undergo structural changes in response to external stimuli. In this paper, we show that digital holographic microscopy (DHM) is an effective candidate for characterisation of SPs (embedded in polymer matrices) and for monitoring of their dynamical changes. The polymer matrices are polylactic acid (PLA) and poly(methyl methacrylate) (PMMA) films, which are decorated with SPs and immobilised on graphene quantum dots (GQDs). GQDs are modified by benzylamines prior to the loading of SP species because of the enhancement of hydrophobic characteristics. UV irradiation is used as the external stimulus and the dynamical changes of the samples before and after UV irradiation are measured. DHM is arranged on a novel self‐referencing setup, which substantially reduces the sensitivity of DHM to environmental vibrations. Morphometric information for characterisation of the samples is obtained by analysis of the recorded digital holograms. The experimental results demonstrate the potential of the presented technique to serve as an alternative technique for surface measurement methodologies such as atomic force microscope and stylus profiler for surface characterisation of similar materials.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%