Amorphous Silicon Position Sensitive Detector Array for Fast 3-D Object Profiling

Contreras, Jaime Contreras; Idzikowski, M.; Pereira, Sónia; Filonovich, Sergej; Fortunato, Elvira; Martins, Rodrigo; Ferreira, I.

doi:10.1109/jsen.2011.2164398

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…The lateral photovoltaic effect (LPE) has been widely employed in optical transducers and sensors especially for those applications where precise autocontrol measurement is necessary such as machine tool alignment, surface profiling, rotation monitoring and robotic vision owing to its linear relation between the instant electrical signal output and the laser spot position illuminated on the hybrid structure surface. On this account, series of jobs recently have been carried out aiming to seek much more reasonable systems which could present with better sensitivity and higher linearity such as hydrogenated amorphous silicon 1 2 3 , quantum dots 4 , and the blended perovskite based heterojunctions 5 since it was first discovered by Schottky 6 and then expanded by Wallmark in floating Ge p-n junctions in 1957 7 . To date, stemming from this desire, our group also have proposed a variety of nano metal (metal-oxide)-semiconductor (MS/MOS) type or MOS-related structures and have achieved a great deal of remarkable photoelectric effect, including large LPE 4 8 9 10 11 and laser-induced bipolar resistance effect 12 13 .…”

mentioning

confidence: 99%

Localized surface plasmon resonances dominated giant lateral photovoltaic effect observed in ZnO/Ag/Si nanostructure

Zhang

Wang

Gan

et al. 2016

Sci Rep

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We report substantially enlarged lateral photovoltaic effect (LPE) in the ZnO/Ag/Si nanostructures. The maximum LPE sensitivity (55.05 mv/mm) obtained in this structure is about seven times larger than that observed in the control sample (7.88 mv/mm) of ZnO/Si. We attribute this phenomenon to the strong localized surface plasmon resonances (LSPRs) induced by nano Ag semicontinuous films. Quite different from the traditional LPE in PN junction type structures, in which light-generated carriers contributed to LPE merely depends on direct excitation of light in semiconductor, this work firstly demonstrates that, by introducing a super thin metal Ag in the interface between two different kinds of semiconductors, the nanoscale Ag embedded in the interface will produce strong resonance of localized field, causing extra intraband excitation, interband excitation and an enhanced direct excitation. As a consequence, these LSPRs dominated contributions harvest much more carriers, giving rise to a greatly enhanced LPE. In particular, this LSPRs-driven mechanism constitutes a sharp contrast to the traditional LPE operation mechanism. This work suggests a brand new LSPRs approach for tailoring LPE-based devices and also opens avenues of research within current photoelectric sensors area.

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mentioning

confidence: 99%

Localized surface plasmon resonances dominated giant lateral photovoltaic effect observed in ZnO/Ag/Si nanostructure

Zhang

Wang

Gan

et al. 2016

Sci Rep

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“…As already described in our previous work [ 7 ], an array of 32 amorphous silicon position sensitive detectors, was integrated inside a self-constructed machine vision system as the vision sensor component and the response was analyzed for the required application. Such work proposed the use of these sensors and relevant systems for 3D object profiling even at high speeds.…”

Section: 128 Psd Array System 3d Object Profile Scanningmentioning

confidence: 99%

“…The experimental setup and procedure for obtaining 3D object profiles with the 32 PSD sensor system were already described elsewhere [ 7 , 8 ] and these also apply for the 128 PSD sensor system. Here, we show results for the detection of the same object when using the 128 PSD array sensor system.…”

Section: 128 Psd Array System 3d Object Profile Scanningmentioning

confidence: 99%

“…The existing 128 PSD array sensor system, when mounted in a triangulation platform, is able to perform 3D object profile scans at high resolutions and speeds with a large number of frames, and this experiment was already presented here. Our previous works describe the implementation, characteristics and behavior of such 32/128 PSD array sensor systems, as well as the manner in which the scanned 3D object profile image is constructed thereby presenting a high speed sheet-of-light 3D object rendering platform [ 7 ] using as sensor an array of 32 amorphous silicon position sensitive detectors [ 6 ]. In the most recent work [ 8 ], we also exploited the 3D scanning optical characteristics of such an inspection system.…”

Section: Introductionmentioning

confidence: 99%

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Simulated and Real Sheet-of-Light 3D Object Scanning Using a-Si:H Thin Film PSD Arrays

Contreras

Tornero

Ferreira

et al. 2015

Sensors

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A MATLAB/SIMULINK software simulation model (structure and component blocks) has been constructed in order to view and analyze the potential of the PSD (Position Sensitive Detector) array concept technology before it is further expanded or developed. This simulation allows changing most of its parameters, such as the number of elements in the PSD array, the direction of vision, the viewing/scanning angle, the object rotation, translation, sample/scan/simulation time, etc. In addition, results show for the first time the possibility of scanning an object in 3D when using an a-Si:H thin film 128 PSD array sensor and hardware/software system. Moreover, this sensor technology is able to perform these scans and render 3D objects at high speeds and high resolutions when using a sheet-of-light laser within a triangulation platform. As shown by the simulation, a substantial enhancement in 3D object profile image quality and realism can be achieved by increasing the number of elements of the PSD array sensor as well as by achieving an optimal position response from the sensor since clearly the definition of the 3D object profile depends on the correct and accurate position response of each detector as well as on the size of the PSD array.

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“…Laser displacement sensors also have high sensitivity and a quick response [29], whereas the volume of a laser displacement sensor is too large for a highly integrated maglev vibration isolation system. Compared with the above-mentioned sensors, the split-type position-sensitive detector (PSD) has an extremely high position resolution, which is a feasible choice to measure the relative position between the base and the platform [30,31]. Moreover, it is more suitable and economical to combine translation and rotation in the expression of coordinate system transformation without adopting additional angle sensors.…”

Section: Introductionmentioning

confidence: 99%

Tracking Control of a Maglev Vibration Isolation System Based on a High-Precision Relative Position and Attitude Model

Liu

Cui

et al. 2019

Sensors

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The maglev vibration isolation system exhibits excellent micro-vibration isolation performance (0.01 Hz to 100 Hz band) in the space environment. However, a collision between the base and the floating platform may occur in an ultra-low frequency range (≤0.01 Hz). To avoid collision, the relative position and attitude between the base and the floating platform needs to be accurately tracked and controlled. In this study, a novel measurement method with four groups of two-dimensional position-sensitive detectors equipped with four laser light sources was proposed. A high-precision relative position and attitude measurement model was established based on the geometric relationship of space coordinates. A proportional-differential (PD) fixed-point control algorithm was adopted to realize tracking control. The control performance of the system was evaluated through simulation. Experiments were also carried out to verify the stability of the system and the precision of the control algorithm. A maglev vibration isolation system prototype was constructed and a test system was established. The proposed relative position and attitude measurement model was verified and the six degrees of freedom relative position and attitude response of the system was tested. Based on the measurement model, the tracking control of the system was proven to have high precision.

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Amorphous Silicon Position Sensitive Detector Array for Fast 3-D Object Profiling

Cited by 11 publications

References 16 publications

Localized surface plasmon resonances dominated giant lateral photovoltaic effect observed in ZnO/Ag/Si nanostructure

Localized surface plasmon resonances dominated giant lateral photovoltaic effect observed in ZnO/Ag/Si nanostructure

Simulated and Real Sheet-of-Light 3D Object Scanning Using a-Si:H Thin Film PSD Arrays

Tracking Control of a Maglev Vibration Isolation System Based on a High-Precision Relative Position and Attitude Model

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