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Wide-field Spectrometer

••This optical system is a new type of integrated field of view imaging spectrometer.••••This optical system is a new type of integrated field of view imaging spectrometer.••The structure can simultaneously obtain high resolution with a wide field of view.••This new structure has the characteristics of simple structure, easy debugging.The currently available area array imaging spectrometer fails to provide high spectral resolution and fast imaging under a wide field of view (FOV). Therefore, this study proposes an integral field imaging spectrometer (IFIS) that uses an image-space telecentric lens (ISTL), a mask, and lenslet array (MLA) as the front structure of the system. The influence of their structural parameters on the optical performance of the system is analyzed by establishing ISTL and MLA models. We selected suitable structural parameters to establish the imaging spectrometer, and provided an experimental demonstration of the system. Our system can achieve a 1.6 nm spectral resolution in a wide FOV of 48.8°. Compared with other spectrometer designs, our system is characterized by a simple structure, wider FOV, and higher spectra. Imaging spectrometerImage-space telecentric lensLenslet arrayIntegral fieldAn imaging spectrometer provides both spatial and spectral information simultaneously to facilitate the analysis of the target scene. Therefore, imaging spectrometers have been widely used in defense, aerospace, remote sensing, public safety, and various other fields,,,. Studies in spectrum acquisition have been conducted for decades, the scanning method used by the earlier spectrometers can only acquire a single beam of light at a time, which limits the sampling rate. Later works focused on developing both efficient image capturing capability and high spectral and spatial resolutions. Although the design of some spectrometers with new structures has improved the spectral resolution, field of view (FOV), and spatial resolution to some extent, these three parameters still need further improvement.A schematic of the system is shown in Fig. 1. The system consists of an ISTL, MLA, dispersion system, and imaging system. The core of the system is a combination of ISTL and MLA. The ISTL makes the chief ray of each object point, in different FOV, parallel. Therefore, the incident light in different FOV has a similar geometric light path for entering the subsequent system. The parallelism of the chief rays emitted from the ISTL will largely affect the spectral resolution. Each object point corresponds to an image point on the focal plane of the ISTL. At this time, a mask is placed on the image focal plane near to the down-sample object surface. A certain number of sub-apertures are distributed on the mask. These number of sub-apertures determine the spatial resolution. Through discretized sampling of the object surface, mutual cr.

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What is the communication distance of optical fiber

Single-mode fiber (SMF) supports distances up to 40-100+ kilometers for standard applications, while multimode fiber (MMF) is typically limited to 300 meters to 2 kilometers. The actual distance depends on factors including fiber type, wavelength, network equipment, and signal. Many factors decide the fiber cable distance, but the key factors include the below six aspects. Attenuation First is the attenuation of the optical fiber. The greater the distance, the greater. Fiber optic cables are the backbone of modern communications, enabling high-speed data transfer over vast distances.

Reasons for Modifying the Distribution Box

Distribution boxes act as important junctions, ensuring uniform effluent distribution to prevent system overload. Signs of issues include odors, slow drainage, and standing water. Regular inspection and maintenance are key. The outlet pipe's location is critical for proper flow. A distribution box — commonly abbreviated as a D-box — is a concrete, plastic, or fiberglass chamber positioned between a septic tank and a drain field to divide clarified effluent into equal flows across multiple leach lines. Its structural integrity and hydraulic balance directly affect the. When it fails, symptoms include uneven wet spots in the yard, slow indoor drains, and sewage odors. Fixes range from jetting clogged outlets ($200–$500) to full box replacement ($600–$2,000). However, not all septic systems are created equal, and one of the key components that can vary is the distribution box. Typically constructed from concrete or plastic, the D-box receives partially treated liquid effluent from the septic tank.