Wavelength-adjustable hyperspectral imager device

Abstract

The invention belongs to the technical field of spectral imaging equipment, and relates to a wavelength-adjustable hyperspectral imager device. A transparent window is designed on the circumference ofa filter wheel; a testing light source and a photodetector are mounted on a coaxial optical path corresponding to the transparent window so as to accurately locate wavelengths; the wavelength-adjustable hyperspectral imager device is produced by combining the filter wheel, the light source, a front objective lens, a lens combination, a sensor and simple mechanical brackets; a motor drives the filter wheel to rotate to change optical filters working in optical path of a lens combination-sensor to accurately determine different wavelengths; the front objective lens receives natural scattered light emitted by the light source, the natural scattered light forms parallel light after passing through the lens combination, a light signal of the parallel light is detected by the sensor and then converted into an analog current signal, the analog current signal is amplified and analog-digital conversion is performed on the analog current signal. The wavelength-adjustable hyperspectral imager device can achieve acquisition, storage, transmission, processing and recurrence of an image, and is suitable for the spectral range of 200-2500nm, especially suitable for a deep ultraviolet light waveband.

Description

Technical field: [0001] The invention belongs to the technical field of spectral imaging equipment, and relates to a hyperspectral imager device with adjustable wavelength. Rotation of the target object under different wavelength conditions to obtain high-resolution spectral images. Background technique: [0002] Hyperspectral imaging technology is based on very narrow-band image data technology. It combines imaging technology with spectral technology to detect the two-dimensional geometric space and one-dimensional spectral information of the target, and obtain continuous and narrow-band images with high spectral resolution. data. Hyperspectral imaging technology is developing rapidly. The common ones include grating spectroscopy, acousto-optic tunable filter spectroscopy, prism spectroscopy, chip coating, etc., which can be applied in food safety, medical diagnosis, aerospace and other fields. With the improvement of the spectral resolution of hyperspectral imaging, its ...

AI Technical Summary

Problems solved by technology

Hyperspectral imagers are classified according to the way they split light, including prism-type imaging spectrometers, grating-type imaging spectrometers, and interference-type imaging spectrometers. Prism-type imaging spectrometers are based on the principle of prism dispersion. Data processing; grating-type imaging spectrometers are based on the principle of optical diffraction, which is prone to high-order spectral line interference, which is not conducive to wide-spectrum spectral separation, and also loses part of the energy

Interferometric imaging spectrometers are large in size and complex in optical path

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