Smartphone-Based Critical Angle Refractometer for Real-Time Monitoring of Brix Value

Amloy, Supaluck; Preechaburana, Pakorn

doi:10.1109/lpt.2019.2892898

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…Because the dynamic range of the intensity is only 256 levels for an eight-bit image sensor, the resolution of the SPRi system is limited to ∼10 −5 RIU [29]. However, it should be noted that the resolution achieved in this work is comparable to resolutions achieved in previous research [22], and is ten times better than that achieved in our previous work [30].…”

Section: Resultsmentioning

confidence: 48%

Smartphone-based surface plasmon resonance imaging for near-field concentration mapping

Preechaburana

Amloy

2021

Eur. J. Phys.

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In this work, smartphone-based surface plasmon resonance imaging is used for the near-field mapping of a liquid sample’s concentration distribution. The principal design uses a special coupler based on a parallel incident light beam with p-polarization from a smartphone screen; this light is used to excite surface plasmons on a gold layer 50 nm thick. Using a bespoke application, surface plasmon resonance (SPR) intensity changes are detected in the SPR images captured with the front-facing camera. The SPR intensity is converted to the corresponding concentration using the three-layer Fresnel equation. Concentration mapping observations are presented for the dilution of ethanol dilution by water in a flow cell and an array of chlorine droplets on a gold surface. The high efficiency of this device means that it can be used for photonics research and advanced laboratory experiments.

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Section: Resultsmentioning

confidence: 48%

Smartphone-based surface plasmon resonance imaging for near-field concentration mapping

Preechaburana

Amloy

2021

Eur. J. Phys.

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“…The resolution of the presented sensing configuration is larger than that reported for other smartphone-based refractometric schemes [20,21], briefly introduced in Section 1. This was expected since, unlike the aforementioned configurations, the proof of concept demonstrated here has been built with no specifically designed optical components.…”

Section: Discussionmentioning

confidence: 80%

“…Finally, concerning future works, the simplicity of the proposed platform architecture should facilitate the design and fabrication of a low-cost clip-on module for smartphones by using additive manufacturing (3D printing). Such a module would essentially consist of a plastic frame hosting the DVD-based liquid cell, which can be adapted for continuous flow operation by including proper inlet and outlet ports as, for example, reported in [21]. In addition, a smartphone software application for image analysis, such as that implemented in [20], could be developed in order to provide the analytical response directly on the smartphone screen, which would be required for actual on-site testing.…”

Section: Discussionmentioning

confidence: 99%

“…That sensing platform showed a quadratic response in the RI range of 1.325−1.344 and a linear response in the RI range of 1.325−1.330 with a resolution of 5.3 × 10 −4 RIU. Later, Amloy et al [21] demonstrated a smartphone-based critical angle refractometer for real-time refractive index monitoring by designing a specific optical coupler with a flow cell on top of the smartphone screen. In that platform, total internal Sensors 2022, 22, 903 2 of 9 reflection of incident light from the phone screen led to images that were sensitive to liquid RI and acquired from the front-facing phone camera.…”

Section: Introductionmentioning

confidence: 99%

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Smartphone-Based Refractive Index Optosensing Platform Using a DVD Grating

Barrios

2022

Sensors

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A low-cost, smartphone-based optical diffraction grating refractometer is demonstrated. Its principle of operation is based on the dependence of the diffraction efficiency of a DVD grating on the surrounding refractive index. The studied configuration uses the built-in LED flashlight and camera of a smartphone as a light source and a detector, respectively, to image the DVD grating diffraction pattern. No additional optical accessories, such as lenses, fibers, filters, or pinholes, are employed. The refractive index sensor exhibits a linear response in the refractive index range of 1.333–1.358 RIU (refractive index unit), with a sensitivity of 32.4 RIU−1 and a resolution of 2 × 10−3 RIU at the refractive index of water. This performance makes the proposed scheme suitable for affinity-based biosensing and a promising optosensing refractometric platform for point-of-need applications.

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“…In order to improve the ability of smart phones to collect optical signals, additional accessories need to be developed. [ 149 ] For the optical chemical sensor array, a significant way to improve the sensitivity is to improve the resolution. The microdevice can remove the limitation of camera lens resolution on optical signal acquisition.…”

Section: From Optical Chemical Sensor To Artificial Olfactory Systemmentioning

confidence: 99%

A March to Shape Optical Artificial Olfactory System toward Ultrasensitive Detection of Improvised Explosives

Zhang

et al. 2022

Advanced Photonics Research

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Smartphone-Based Critical Angle Refractometer for Real-Time Monitoring of Brix Value

Cited by 6 publications

References 14 publications

Smartphone-based surface plasmon resonance imaging for near-field concentration mapping

Smartphone-based surface plasmon resonance imaging for near-field concentration mapping

Smartphone-Based Refractive Index Optosensing Platform Using a DVD Grating

A March to Shape Optical Artificial Olfactory System toward Ultrasensitive Detection of Improvised Explosives

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