KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Search Results

Now showing 1 - 7 of 7

Some of the metrics are blocked by your
consent settings
The electrochemical measurements investigation of NiCo2O4for electrode materials of energy storage devices by using digital holography technique
(2021-01-01)
Prakobsang, Tawipon
;
Saei, Worawee
;
Kongsubto, Thee
;
Ruttanapun, Chesta
;
Buranasiri, Prathan
The electrochemical properties of NiCo2O4for using as electrode materials for the potential applications have been investigated by electrochemical measurement which composed of cyclic voltammetry (CV) and galvanostatic chargedischarge (GCD). These processes are generating the ion exchange between the electrode and electrolyte, wherein induce the surface change of the interface. Especially, since in the cycle ability measurement using the potentiostat needed to repeat the cycle into the electrode for many times, the effective of the electrode is reduced. In this research, digital holographic technique was used to investigate the different properties of interface of the NiCo2O4 electrode while operating under the various electrochemical techniques. In our DH recording, the surface change of the electrode was expose at the difference potential scan rate at 1, 5, 10, 50, 100 and 200 mV/s of CV, and the difference current densities at 1, 2, 3, 5, 10 and 20 A/g of GCD and vary times of cycle ability test every 50 cycle times to 1000 cycles. In the end the reconstructed DH images of the electrode have been used to analyze the results from electrochemical measurement.
Some of the metrics are blocked by your
consent settings
Polarization effect of quantitative phase imaging using digital holography method
(2019-01-01)
Gasosoth, T.
;
Jongjinakool, K.
;
Buranasiri, P.
In this study, we investigate polarization effect of quantitative phase imaging (QPI) using digital holography (DH) technique. By using different polarization state of writing beam the reconstructed images of different kinds of samples including biological cells from DH interferometer have been analyzed and shown their difference of quantitative measurement with reconstructed images of unpolarized writing fields. In addition, the property changes of some samples have been studied using the property analysis of the polarization image fields.
Some of the metrics are blocked by your
consent settings
The investigation of corrosion behavior of electrodeposited Co-Fe alloys surface with phase and 3D reconstruction of image using TIE and TPE
(2018-01-01)
Srisuwan, Thanthanat
;
Somphonsane, Ratchanok
;
Sutthiruangwong, Sutha
;
Buranasiri, Prathan
In this research, phase retrieval using transport of intensity equation (TIE) and transport of phase equation (TPE) have been used for determine the surface of corrosion behavior of electrodeposited Co-Fe alloys, an important component in hard disk drive. Without interferometer as used in digital holography technique, by using TIE and TPE, our observing setup is simple and compact. The experimental results show the capability of TIE and TPE for observing the pitting corrosion. The pitting corrosion of Co-Fe image results have also shown. The dynamic process of microstructure surface system would be conducted and may be applied to hard disk drive industry in the future.
Some of the metrics are blocked by your
consent settings
Digital holography system for undergraduate student laboratory
(2015-01-01)
Buranasiri, P.
;
Plaipichit, S.
;
Yindeesuk, W.
;
Yoshimori, K.
In this paper, we discuss the digital holography (DH) experiment in our optical and communication laboratory course for undergraduate students at Physics department, KMITL. The purposes of DH experiment are presenting our students the meaning and advantage of DH and its applications. The Gabor configurations of in-line DH has been set up for recording a number of samples, which were placed on different distances, simultaneously. Then, the images of all objects have been numerical reconstructed by using computer. The students have been learned that all of reconstructed images have been got from only one time recording, while using the conventional recording technique, sharp images of different objects have been gotten from different recording time. The students also have been learned how to use DH technique for investigation some different kinds of samples on their own of interested such as a human hair or a fingerprint. In our future work, our DH system will be developed to be a portable apparatus for easily showing to children in different areas.
Some of the metrics are blocked by your
consent settings
Imaging enhancement of digital holography using photorefractive effect
(2015-01-01)
Sidakum, K.
;
Buranasiri, P.
;
Plaipichit, S.
;
Yindeesuk, W.
;
Yoshimori, K.
In this research, two-wave coupling in photorefractive lithium niobate crystal has been used to do imaging enhancement of digital holography (DH) system. The image bearing beam of in-line DH system has been incident and interfered with a reference beam that was emerged from the same laser on a LiNbO<inf>3</inf> crystal. With certain angles between both beams, the energy of the reference beam was transferred to the image bearing beam then resulted the enhancement of the reconstructed image of the DH system. By using the suitable intensity of laser beam with a right PR crystal, the image from an in-line DH imaging system would be improved.
Some of the metrics are blocked by your
consent settings
The investigation of thermal effect on dynamical shape changing of solder paste by using double-view digital holography
(2015-01-01)
Thong-On, T.
;
Prakobsang, T.
;
Pethsanthad, W.
;
Boonsri, C.
;
Plaipichit, S.
In this paper we propose a modern technique to evaluate the shape changes of solder paste by using double-view in-line digital holography. We observed the transformation of three different kinds of solder paste composition: pure solder paste, solder paste mixed with 0.02%, 0.05%, 0.10% graphene (GPN) and 0.02%, 0.05%, 0.10% graphene oxide (GPNO), respectively. The shape of the solder pastes was investigated at different melt temperatures (i.e. 200°C, 250°C, and 300°C) for 30 seconds using a collimated beam propagating through the solder paste, then being double reflected on a mirror and second incident on another sides of the solder paste. The double images bearing beams were recorded with a CCD sensor simultaneously. The single recorded digital hologram from double view technique was reconstructed using digital holography. The results show that the double-view technique provides reliably data. Moreover, it would be developed for observing more than two images by single holography writing in the future.
Some of the metrics are blocked by your
consent settings
The direct measurement of the photorefractive grating on anisotropic self diffraction using digital holography
(2014-09-02)
Plaipichit, Suwan
;
Buranasiri, Prathan
;
Ruttanapun, Chesta
;
Jindajitawat, Phumin
In this paper, the measurement of grating period in photorefractive anisotropic self diffraction by using digital holography technique is proposed. In our experimental setup, He -Ne laser beam with wavelength of 632.8 nm has been separated and then incident on photorefractive cerium doped barium titanate crystal to produce photorefractive index grating. The transmitted probe beam, which contains phase and amplitude has been expanded and recorded on digital camera. To explore the grating periods, both phase and amplitude of the images are reconstructed by numerical process using computer. Then the grating periods in photorefractive anisotropic self diffraction have been measured. The results show grating periods, holograms and their reconstruction. © 2014 Taylor & Francis Group, LLC.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results