nanospot nextion tft display in stock
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Programmable colored illumination microscopy (PCIM) has been proposed as a flexible optical staining technique for microscopic contrast enhancement. In this method, we replace the condenser diaphragm of a conventional microscope with a programmable thin film transistor-liquid crystal display (TFT-LCD). By displaying different patterns on the LCD, numerous established imaging modalities can be realized, such as bright field, dark field, phase contrast, oblique illumination, and Rheinberg illuminations, which conventionally rely on intricate alterations in the respective microscope setups. Furthermore, the ease of modulating both the color and the intensity distribution at the aperture of the condenser opens the possibility to combine multiple microscopic techniques, or even realize completely new methods for optical color contrast staining, such as iridescent dark-field and iridescent phase-contrast imaging. The versatility and effectiveness of PCIM is demonstrated by imaging of several transparent colorless specimens, such as unstained lung cancer cells, diatom, textile fibers, and a cryosection of mouse kidney. Finally, the potentialities of PCIM for RGB-splitting imaging with stained samples are also explored by imaging stained red blood cells and a histological section.
Here, we present dual-dimensional microscopy that captures both two-dimensional (2-D) and light-field images of an in-vivo sample simultaneously, synthesizes an upsampled light-field image in real time, and visualizes it with a computational light-field display system in real time. Compared with conventional light-field microscopy, the additional 2-D image greatly enhances the lateral resolution at the native object plane up to the diffraction limit and compensates for the image degradation at the native object plane. The whole process from capturing to displaying is done in real time with the parallel computation algorithm, which enables the observation of the sample"s three-dimensional (3-D) movement and direct interaction with the in-vivo sample. We demonstrate a real-time 3-D interactive experiment with Caenorhabditis elegans. (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).
In this paper, under investigation is a coupled variable-coefficient higher-order nonlinear Schrödinger system, which describes the simultaneous propagation of optical pulses in an inhomogeneous optical fiber. Based on the Lax pair and binary Darboux transformation, we present the nondegenerate N-dark-dark soliton solutions. With the graphical simulation, soliton propagation and interaction are discussed with the group velocity dispersion and fourth-order dispersion effects, which affect the velocity but have no effect on the amplitude. Linear, parabolic and periodic one dark-dark solitons are displayed. Interactions between the two solitons are presented as well, which are all elastic.
A nanoimmunosensor based on wavelength-dependent dark-field illumination with enhanced sensitivity was used to detect a disease-related protein molecule at zeptomolar (zM) concentrations. The assay platform of 100-nm gold nanospots could be selectively acquired using the wavelength-dependence of enhanced scattering signals from antibody-conjugated plasmonic silver nanoparticles (NPs) with on-off switching using optical filters. Detection of human thyroid-stimulating hormone (hTSH) at a sensitivity of 100 zM, which corresponds to 1-2 molecules per gold spot, was possible within a linear range of 100 zM-100 fM (R=0.9968). A significantly enhanced sensitivity (~4-fold) was achieved with enhanced dark-field illumination compared to using a total internal reflection fluorescence immunosensor. Immunoreactions were confirmed via optical axial-slicing based on the spectral characteristics of two plasmonic NPs. This method of using wavelength-dependent dark-field illumination had an enhanced sensitivity and a wide, linear dynamic range of 100 zM-100 fM, and was an effective tool for quantitatively detecting a single molecule on a nanobiochip for molecular diagnostics. Copyright © 2016 Elsevier B.V. All rights reserved.
We investigate Huygens" optical vector wave field synthesis scheme for electric dipole metasurfaces with the capability of modulating in-plane polarization and complex amplitude and discuss the practical issues involved in realizing multi-modulation metasurfaces. The proposed Huygens" vector wave field synthesis scheme identifies the vector Airy disk as a synthetic unit element and creates a designed vector optical field by integrating polarization-controlled and complex-modulated Airy disks. The metasurface structure for the proposed vector field synthesis is analyzed in terms of the signal-to-noise ratio of the synthesized field distribution. The design of practical metasurface structures with true vector modulation capability is possible through the analysis of the light field modulation characteristics of various complex modulated geometric phase metasurfaces. It is shown that the regularization of meta-atoms is a key factor that needs to be considered in field synthesis, given that it is essential for a wide range of optical field synthetic applications, including holographic displays, microscopy, and optical lithography.
While optical tweezers have been widely used for the manipulation and organization of microscopic objects in three dimensions, observing the manipulated objects along axial direction has been quite challenging. In order to visualize organization and orientation of objects along axial direction, we report development of a Digital holographic microscopy combined with optical tweezers. Digital holography is achieved by use of a modified Mach-Zehnder interferometer with digital recording of interference pattern of the reference and sample laser beams by use of a single CCD camera. In this method, quantitative phase information is retrieved dynamically with high temporal resolution, only limited by frame rate of the CCD. Digital focusing, phase-unwrapping as well as online analysis and display of the quantitative phase images was performed on a software developed on LabView platform. Since phase changes observed in DHOT is very sensitive to optical thickness of trapped volume, estimation of number of particles trapped in the axial direction as well as orientation of non-spherical objects could be achieved with high precision. Since in diseases such as malaria and diabetics, change in refractive index of red blood cells occurs, this system can be employed to map such disease-specific changes in biological samples upon immobilization with optical tweezers.
High-speed surface inspection plays an important role in industrial manufacturing, safety monitoring, and quality control. It is desirable to go beyond the speed limitation of current technologies for reducing manufacturing costs and opening a new window onto a class of applications that require high-throughput sensing. Here, we report a high-speed dark-field surface inspector for detection of micrometer-sized surface defects that can travel at a record high speed as high as a few kilometers per second. This method is based on a modified time-stretch microscope that illuminates temporally and spatially dispersed laser pulses on the surface of a fast-moving object and detects scattered light from defects on the surface with a sensitive photodetector in a dark-field configuration. The inspector"s ability to perform ultrafast dark-field surface inspection enables real-time identification of difficult-to-detect features on weakly reflecting surfaces and hence renders the method much more practical than in the previously demonstrated bright-field configuration. Consequently, our inspector provides nearly 1000 times higher scanning speed than conventional inspectors. To show our method"s broad utility, we demonstrate real-time inspection of the surface of various objects (a non-reflective black film, transparent flexible film, and reflective hard disk) for detection of 10 μm or smaller defects on a moving target at 20 m/s within a scan width of 25 mm at a scan rate of 90.9 MHz. Our method holds promise for improving the cost and performance of organic light-emitting diode displays for next-generation smart phones, lithium-ion batteries for green electronics, and high-efficiency solar cells.
2. Wait for Pi-Star to boot up, which normally takes a minute or so (a bit longer when using a slower computer like the RPi Zero W). Note: If your hotspot has a display, you can watch Pi-Star start up until the login prompt is displayed, but don"t log in there because you can"t set up Pi-Star via the hotspot.
⋀ Top | Quick links ⋁ Ⓢ 5) Performing initial Pi-Star con gurationAfter authentication, the Con guration view is displayed. I"m going to discuss these con gurationsettings in three parts: Basic, Digital mode, and Additional.
Clicking any of the Apply Changes buttons will apply all changes made in any of the sections, but it"s a good idea to apply changes after working in each section. For example, if you have enabled various modes (DMR, D-STAR, etc.), the associated con guration section is displayed only after you apply your changes.
Note 2: To learn more about Nextion screens, visit the Nextion Screens⩘ group or the Nextion Ham-Radio Screens⩘ Facebook group, both moderated by Dutch ham and digital voice enthusiast Rob van Rheenen, PD0DIB.
Layout, for Nextion displays: G4KLX or ON7LDS L2, L3, or L3 HS. Note 1: For a good summary explanation of the differences between the layout types, see the Pi-Star User Forum "Screen layout" post⩘ by Ryan, WA6HXG as well as his GitHub project page: WA6HXG/MMDVM-Nextion-Screen- Layouts⩘ .
Note 2: For a selection of Nextion screen layouts as well as the more detailed readme explanations of the differences between the layouts, see the Nextion subfolders of the g4klx/MMDVMHost GitHub page⩘ . See also my note: Nextion screen customizations⩘ .
Optionally, you can open the Pi-Star dashboard on any Windows, Mac, or Linux computer (not thehotspot) connected to the same network as the hotspot by browsing to (use trailing slash) http://pi-star/for Windows, or http://pi-star.local/. Enabled modes are highlighted green, and you can monitor activity. Note: If you enable YSF, P25, NXDN, or any of the cross modes, you"ll see additional info displayed in the dashboard"s left column. (This image is for illustration purposes only. Normally, only one cross-mode network is enabled, for example, only YSF2DMR, and you would disable the corresponding base cross-mode, for example if using YSF2DMR, DMR would be disabled.)
Activity modules – The lower portion of Admin view displays activity modules.DMR links: In the DMR Repeater module, linked talkgroups are shown on the left and linkedre ectors on the right. For example, if you link to DMR+ re ector 4400 with a private call to84400, you"ll then talk on TG 9, so you"ll see TG 9/Ref 4400. For more info, see: DMRGatewaynotes⩘ .
[General] Callsign=fill in your callsign Timeout=180 Duplex=0 # ModeHang=10 # RFModeHang=10 RFModeHang=30 #(minimum 30sec required for Fusion) NetModeHang=3 Display=Nextion #(in case Nextion display is used) #Display=None Daemon=0
[LCDproc]Address=localhostPort=13666 #LocalPort=13667 DimOnIdle=0 DisplayClock=1 UTC=0
Download the Nextion Firmware into the display using the Raspberry Pi 3 # cd /opt/MMDVMHost/Nextion # python nextion.py NX3224T024.tft /dev/ttyUSB0 #(use the .tft file conform the productcode mentioned on the back
[Nextion] # Port=modem # Port=/dev/ttyAMA0 Port=/dev/ttyUSB0 Brightness=50 DisplayClock=1 UTC=0 IdleBrightness=5 #(level at your own preference)
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