Multispectral imager with spectral focusing optical group and associated acquisition method

Abstract

This multispectral imager (1) comprises a sensor (3) and an optical system (5) including a spectral focusing optical group (9) and an axial displacement system (13) for said spectral focusing optical group (9). The optical system (5) is configured to refract electromagnetic radiation (R) incident on the sensor (3) and to implement spectral defocusing of the refracted electromagnetic radiation (R), the spectral defocusing being greater than 100 micrometers for a wavelength difference of 100 nanometers. The axial displacement system (13) moves the spectral focusing optical group (9) between a focusing position on the sensor (3) for electromagnetic radiation (R) with a wavelength of 500 nm, and a focusing position for electromagnetic radiation (R) with a wavelength of 1800 nm. Figure for the abbreviation: Fig. 1

Inventors

DAVENEL ARNAUD
GAWRON DAMIEN

Assignees

SAFRAN ELECTRONICS & DEFENSE

Dates

Publication Date: 20260501
Application Date: 20231219
Priority Date: 20231219