Short-wave infrared imaging spectrometer based on a tandem acousto-optical tunable filter

Subject of study. This study focuses on methods for designing optical schemes for acousto-optical (AO) hyperspectral devices tailored for applied problems. Aim of study. The objective is to develop a hyperspectral device incorporating a tandem AO tunable filter for the 0.85–1.6 µm spectral range. Method. The optical system of the hyperspectral device was designed using Zemax, supported by an original software module. The simulation outcomes were experimentally verified. Main results. A short-wave infrared hyperspectral device was designed and manufactured. The device employs an InGaAs sensor and uses tandem AO filtration to enhance both spatial and spectral resolution. With an afocal optical system at the entrance, the device offers an angular field of view of 8×12 ∘ . It enables the acquisition of spectral images from objects located at distances of 1 m or greater, delivering a spatial resolution of approximately 200×150 resolvable elements within its field of view. The spectral bandwidth is 12 nm at a wavelength of 1.06 µm. Practical significance. Although primarily developed for agricultural applications, the hyperspectral device is versatile and can be applied in other fields, such as remote sensing, biomedical diagnostics, and non-destructive testing of technical objects.