Method and system design for spectral imaging based on dual micro-lens array field-of-view segmentation

Abstract

The function of a mask in the integral field imaging spectrometer (IFIS), which segments image and samples, leads to the drawback of low spectral energy transmittance. Here, we improve field-of-view segmentation method and propose a dual micro-lens array imaging spectrometer (DMAIS). DMAIS comprises a projection lens (PL), a segmentation collimation module (SCM), and a telecentric lens (TL). And SCM, based on a dual micro-lens array, is the core component of it. By employing a lens array focusing approach instead of aperture sampling, DMAIS effectively enhances energy transmittance and reduces spectral bending. The ZEMAX simulation results indicate that compared to IFIS, DMAIS demonstrates a 109.2% increase in energy transmittance and a 32.9% reduction in spectral bending.

Optical Design of a Hyperspectral Remote-Sensing System Based on an Image-Slicer Integral Field Unit in the Short-Wave Infrared Band

“…Dispersive spectral imaging systems have been a focus in the field of spectral imaging due to their simple design [ 9 ]. Gratings are one of the commonly used optical elements in dispersive spectrometers, and they are used to achieve high spectral resolution due to their high dispersion efficiency [ 10 ].…”