CPC G01J 5/07 (2022.01) [G01J 5/0025 (2013.01); G02B 17/061 (2013.01); G02B 17/0808 (2013.01); H04N 5/33 (2013.01)] | 10 Claims |
1. An optical device, intended to be arranged on a detector equipped with an infrared sensor in order to increase an angle of the field of view of the detector, comprising:
a primary mirror of circular overall shape, comprising a circular opening at its center,
a secondary mirror of circular overall shape and of diameter smaller than the diameter of the primary mirror, comprising a circular opening at its center,
at least one connecting means for connecting the primary mirror and the secondary mirror, so as to arrange a reflective surface of the primary mirror facing a reflective surface of the secondary mirror,
the primary and secondary mirrors being designed to reflect radiation in the infrared; and
the primary mirror and the secondary mirror being configured to form an afocal system and to form a continuous very wide-angle image with the center of the image obtained by the central circular openings, the angle (α) of the field of view of the device being greater than 90°.
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