To increase productivity in agricultural production, speed, and accuracy is the key requirement for long-term economic growth, competitiveness, sustainability. Traditional manual paddy rice seed classification operations are costly unreliable because human decisions identifying objects issues inconsistent, subjective, slow. Machine vision technology provides an alternative automated processes, which nondestructive, cost-effective, fast, accurate techniques. In this work, we presented a study...

The optical spectrometer is a widely established and used scientific instrument for analyzing biochemical samples. However, it expensive, bulky, requires an external power source computer to operate, which makes difficult use in resource-limited countries remote locations. Advancement smartphone technology has led the development of portable, low-cost smartphone-based spectrometers. lack software automatic wavelength calibration results irrelevant workloads students within time limit course....

In this paper, automatic fever screening system is proposed and experimentally implemented using an IR camera a mobile phone. Our locates position of patients automatically face detection algorithm on RGB image obtains temperature from at detected location. Advantages are fast, portable, non-contacting simultaneously measurement. Furthermore, allows the to track patient's position. Hence, robust measurement can be properly done even not stand still. has been field-tested measure screen ill...

Nowadays, body temperature screening is very important especially in the current global coronavirus disease (COVID-19) epidemic. It can be considered as first step monitoring fever symptom if checked regularly. Aiming at alleviating influence of working distance and ambient disturbance, this article proposes demonstrates a self-compensation technique that built into our low-cost thermal imaging-based system. The key idea relies on combination 3-D depth sensor, an electronic reference for...

The need of mobile microscope is escalating as well the demand high quality optical components in low price. We report here a novel needle moving technique to fabricate milli-size lens together with thermal assist moldless method. Our proposed protocol able create tensile strength structure and its base which beneficial for exploiting convertinga smart phone be digital microscope. observe that no bubble trapped when this performed can overcome challenge problem found typical dropping...

We introduce and experimentally demonstrate an optofluidics-based refractometer structure arranged in a simple free-space Young interferometer design. Our key idea is based on the use of very microfluidic chip that consists one or two flow channels parallel. then pass optical beam through chip. Behind channels, there are small apertures where incident automatically divided into beams. These beams propagating free space for desired distance before they interfere with each other at observation...

As fast human temperature screening is needed in large public areas, this paper proposes a low-cost mobile platform module that combines the advantages of analyzing visible and thermal images. In particular, key idea relies on face detection image. Then coordinates all faces detected are mapped to image determine their corresponding temperatures. Internal compensation external reference also employed reduce unwanted fluctuation inside surrounding environment. Our module, called , uses FLIR...

We propose a simple single-flow-channel microfluidic chip that can be used in an interferometry-based refractometer for the realization of highly sensitive refractive index analysis. The key idea relies on sandwiching two chips such way their flow channels are laterally shifted with respect to each other, forming use our Young's interferometric-based refractometer. Experimental demonstrations laboratory prototype, comprised large 1 mm deep 400 μm lateral shift between channels, 635 nm...

This paper introduces a non-invasive human temperature screening system for use in large public area. Our key idea is to combine an image filtering process, morphology algorithm, and particle analysis process such way that individual's face live thermal can be located so the skin monitored displayed. From our experiment, we find measurement depends on each response ambient contrast of against black body radiation source. indicates using blackbody source as reference does not totally...

A wavelength-sensitive three-port variable fiber-optic attenuator (VFOA) is introduced by incorporating the movable optical mirror with a fixed desired thin-film filter (TF). Experimental proof of concept using an off-the-shelf measured 1545.60-nm TF and mechanically shows low 0.47-dB loss, polarization-dependent loss 0.6 dB at maximum attenuation setting, 15.9-dB dynamic range output port. Several proposed VFOAs can also be cascaded to form cost compact multiwavelength amplitude controller.

A reconfigurable 2 /spl times/ add-drop fiber-optic switch structure is proposed by incorporating the independent mechanical control and alignment of an off-the-shelf thin-film filter with a reflective optical element. Cascading several switches gives low-cost polarization-independent wavelength routing system limitation in loss that can be compensated using amplifiers. The experimental result indicates measured average <1.30 dB at center wavelength. In addition, coherent crosstalk values...

This paper proposes a highly sensitive and compact optofluidics-based refractometer. Our key idea is based on the use of two-channel microfluidic chip in free-space Young interferometer structure that provides an inherent advantage cancelling unwanted optical phase noise induced from surrounding environment during beam propagation. By using 655-nm monochromatic light travels free space for 57.5 cm designed to have two fluidic channels parallel with distance between 900 μm channel depth 100...

In this article, we propose a built-in-mask two-flow-channel microfluidic chip for use in our highly-sensitive Young interferometry-based refractometer structure. Our key idea is to make the area surrounding two flow channels opaque by using black material (e.g., silicone). Once incoming optical beam passes through channels, it automatically divided into beams that will interfere with each other at two-dimensional detection plane, eliminating highly precise alignment technique previously...

A surface plasmon resonance (SPR)-based optical touch sensor structure is proposed that provides high switch sensitivity and requires a weak activating force. Our SPR-based arranged in compact Kretschmann-Raether configuration which the prism acting as our head coated with metal nanofilm. optical-based noise rejection scheme relies on wavelength filtering, spatial reflectivity of nanofilm, whereas electrical-based reduction obtained by means an electrical signal filtering process. In...

Due to the need of a highly sensitive touch keyboard for disabled, we propose no-moving-parts optical architectures based on use light splitting and blocking concepts. Light via fiber optic splitter is also introduced reduce precise alignment technique required in our free-space-based keyboard. Several key features are accomplished, including high switch sensitivity, scalability, ease implementation, low electrical power consumption. Our 5×4 prototype shows activating time 19 ms scanning...

We propose and experimentally show that a highly-sensitive optofluidics-based refractometer structure can be simply realized. Our key idea is based on the use of very simple microfluidic chip consists only one flow channel. Specifically, we sandwich two chips in such way their channels are laterally shifted at desired distance, forming for our Young interferometric-based structure. Experimental demonstration using large 1-mm-deep single-flow-channel chips, 635-nm wavelength laser diode,...

This paper shows how only a single-channel microfluidic chip when deployed in our interferometric optofluidics-based refractometer can offer very high sensitivity of 6.16×10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-6</sup> RIU/pixel suitable for sensitive bio and chemical sensing applications.

We propose a two-flow-channel microfluidic chip for use in Young interferometry-based refractometer structure. Specifically, this work embeds the optical mask inside chip, thus completely eliminating precise free-space alignment between and chip. The key idea is accomplished by permanently making area surrounding two flow channels opaque. Once incoming beam passes through channels, it automatically divided into beams that will interfere with each other at two-dimensional detection plane....

&lt;p&gt;Multispectral imaging camera is an important tool for two-dimensional (2-D) and 3-D spectroscopic analysis. First deployment was in space remote sensing application, it now available applying on sites or installing with drones. In this work, we propose affordable palm-size wide-band multispectral camera, covering broad blue, green, red, near infrared, long wave infrared regions. Our module also embedded our own designed software capturing recording 2-D spectral images depth...

This paper proposes an edge quality assessment system for a sub-millimeter thick wafer bar suitable semiconductor and harddisk drive industries. Our key approach is based on Fourier optics analysis in retro-reflective optical architecture featuring nondestructive non-contact measurement. In our proposed design, collimated beam incident from its side. this way, part of the reflected back then transformed two-dimensional image sensor. By investigating far-field diffraction pattern, important...