Abstract A silicon chip integrated microelectromechanical (MEMS) wind energy harvester, based on the vortex-induced vibration (VIV) concept, has been designed, fabricated, and tested as a proof-of-concept demonstration. The harvester comprises of cylindrical oscillator attached to piezoelectric MEMS device. Wind tunnel experiments are conducted measure power output harvester. Additionally, is placed within formation up 25 cylinders test whether vortex interactions multiple in can enhance...

Grating plays an essential role in various optical systems owing to its unique dispersion properties. In recent years, there is increasing demand miniaturize for a wide range of field applications. Therefore, the integration diffraction grating with MEMS technology provides efficient way build truly miniaturized systems. Till now, gratings have mainly been explored two directions, namely scanning and tunable gratings. are constructed variety actuators drive platform scan across target, they...

In this paper, a single-pixel hyperspectral imager is developed based on the Hadamard transformation. The imager's design, fabrication, signal processing method, and experimental results are discussed. works in pushbroom mode employs both spatial encoding spectral to acquire data cube. patterns, which known for their multiplexing advantage achieve high signal-to-noise ratio (SNR), used schemes. A digital micromirror device (DMD) from Texas Instruments (TI) slow resonant scanning mirror...

This letter demonstrates a miniature spectrometer suitable for transmission spectroscopy. A MEMS oscillating mask is designed to encode the light distribution dispersed along slit. single-pixel photodetector employed collect encoded light, and thus proposed principle workable any wavelength range. Compressive sensing theory used design encoding patterns implemented on encoder release requirement long travel range of actuators improve spectral resolution. The experimental results prove that...

In this paper, a single-pixel mid-infrared (mid-IR) Hadamard transform spectrometer is developed. The spectrometer's design, fabrication and experimental results are discussed. mid-IR has dual cascaded encoding regions, 2875 nm to 3500 4077 nm, reduce the travel range required by moving mask. encoded wavelength band determined bandpass filter used. A collection optics consisting of reverse used collect signal onto detector with small sensing area. 635 laser as reference within calibrate...

A novel concept of on-chip Fourier transform spectrometer is proposed. It consists semiconductor waveguide directional couplers and NEMS actuators. The optical path difference can be tuned by controlling the actuators to couple or decouple couplers. With 9 stages couplers, we demonstrate numerically that spectral resolution reach up 4 nm in 1.5 μm 1.8 wavelength range. Further enhancement achieved increasing number integrated driven This design meets requirement small size, weight power may...

A microelectromechanical systems (MEMS) based self-referencing cascaded line-scan camera using single-pixel detectors is proposed and verified. Single-pixel make it an attractive low-cost alternative of a traditional that can operate at any wavelength. The system composed several identical line imager units driven by common actuator. Each unit integration imaging slit, MEMS encoding mask, light concentrator detector. spatial resolution the thus be N-fold immediately cascading N to achieve...

In this paper, a one-dimensional (1D) line imager based on single pixel detector is proposed. A cyclic S-matrix used to construct the MEMS encoding mask. Compressive sensing (CS), which can reduce sampling points requirement, successfully recover image. The proposed imaging principle might be useful in optical spectrometers.

In this paper, we present a single-pixel hyperspectral imager based on Hadamard transformat ion. The uses micromirror array and resonant scanning mirror to implement spatial spectral encoding. For proof of concept, the sensing wavelength is 450nm 750nm, but it can easily be applied infrared wavelengths. It has high robustness frame rate compared with conventional imagers. We also introduce cascading method that enhance resolution imager. Some experimental results are presented in paper...

Novel concepts of on-chip Fourier transform spectrometers is proposed. The principal element in the spectrometer semiconductor waveguide directional couplers. optical path difference can be tuned by varying coupling length or influencing propagation mode coupler. Solutions both these two methods are proposed, and theories verified spectra recovering. They function well around 1.5 μm wavelength. Further enhancement achieved cascading more stages couplers extending length. This design meets...

In this paper, a spectrometer based on compressive sensing is proposed to recover sparse spectrums. Compressive can reduce the required travel range provided by MEMS actuators, and single-pixel detector employed collect encoded light overall construction cost.

This paper introduces a cascaded single-pixel line imager. Single-pixel detectors in the imager has potential application any wavelength at low cost and small scale. Experimental results with row of 12 white LEDs are presented this paper, 2D 40 array also to demonstrating its use imaging.

Wind tunnel experiments have been conducted to investigate the effect of turbulence on power output a MEMS aeroelastic wind energy harvester approximately 5.5 mm × 10 in size. The consisted mainly cylinder (2 diameter, length) attached platform equipped with piezoelectric. is artificially created via generator comprising series rectangular beams placed upstream harvester. By varying speed and width beams, it shown that time-averaged increases significantly as size increases. In particular,...