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...

Water, as a finite and vital resource, necessitates water quality monitoring to ensure its sustainable use. A key aspect of this process is the accurate measurement critical parameters such chemical oxygen demand (COD). However, current spectroscopic methods struggle with accurately consistently measuring COD in large-scale, complex environments due an insufficient understanding spectra limited generalizability. To address these limitations, we introduce physicochemical-informed spectral...

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...

High fill factor for Fresnel lens arrays has been achieved with the aid of polygonal lenses. This done both circular trimmed lenses and full lenses, which present some optical drawbacks. The composite (CPFL) avoids these issues its unique design - a radial symmetric center filling into polygon, avoiding any intersecting facets within by introducing fillets. To manufacture CPFL, diamond shaping is applied to not only meet strict standards required fabrication but also maneuver around...

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 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...

Calibration is an important step in the construction of traditional spectrometers to ensure accuracy obtained spectrum. Recent advancements computational spectroscopy have also spurred need for calibration with aid machine learning enable recovery spectrums, but they generally require large datasets. In this paper, we present arbitrary spectrum generation engine (ASGE) using a digital micromirror device (DMD) that can be configured work broad wavelength range from visible near-infrared. The...

Light detection and ranging (LiDAR) have emerged as a crucial tool for high-resolution 3D imaging, particularly in autonomous vehicles, remote sensing, augmented reality. However, the increasing demand faster acquisition speed higher resolution LiDAR systems has highlighted limitations of traditional mechanical scanning methods. This study introduces novel wavelength-multiplexed code-division multiple access (CDMA) parallel laser approach with single-pixel receiver to address these...

The time-delay integration (TDI) technique is increasingly used to improve the signal-to-noise ratio (SNR) of remote sensing and imaging by exposing scene multiple times. Inspired principle TDI, we propose a TDI-like pushbroom multi-slit hyperspectral (MSHSI) approach. In our system, slits are significantly throughput thereby enhancing sensitivity SNR through exposures same during scan. Meanwhile, linear dynamic model for MSHSI established, where Kalman filter (KF) employed reconstruct...

This paper introduces a hyperspectral imager using single-pixel detector. The employs digital micromirror device and scanning mirror for spatial spectral encoding, respectively. Experimental results in the visible wavelength range are presented proposed imaging principle can also be easily applied to at any other wavelengths.

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...

Infrared devices are increasingly used in industrial, medical, and environmental monitoring applications. Cost-effectiveness, robustness, portability characteristics that highly sought after they can be enabled by a dispersive spectrometer carrying single-pixel detector. In this paper, we demonstrate novel, high-throughput has its spectral resolution decoupled from throughput. The proposed implements two-stage Hadamard transform encoding process allows significantly more light into the...

In this paper, we present a doubly-encoded single-pixel Hadamard transform spectrometer that has its spectral resolution decoupled from throughput. The proof-of-concept is designed in the 1500 nm to 1600 near-infrared (NIR) wavelength range and uses digital micromirror device (DMD) conjunction with fixed mask for encoding. proposed system can easily be extended other infrared (IR) wavelengths achieve maximum throughput multiplexing advantage.

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.

Complex environments, such as those found in surgical and search-and-rescue applications, require soft devices to adapt minimal space conditions without sacrificing the ability complete dexterous tasks. Stacked Balloon Actuators (SBAs) are capable of large deformations despite folding nearly flat when deflated, making them ideal candidates for applications. This paper presents design, fabrication, modeling, characterization monolithic, inflatable, SBAs. Modeling is presented using analytical...