| 摘要 |
<p>The invention concerns the field of multiple field multispectral optical combination designed to be incorporated in an optical device, in particular an imaging device. Said multiple field optical combination is of the Cassegrain type having an image focal plane (PFI), comprising a primary perforated concave mirror (M1) stationary relative to the image focal plane and a secondary convex mirror (M2), the structure and the position, in small field configuration, of the mirrors being such that the light which is derived from an external scene and designed to be focused at the image focal plane is in the interval first reflected by the first primary mirror then by the secondary mirror, further comprising a second primary perforated concave mirror (M5) mobile relative to the image focal plane, the structure and the position, in median field configuration, of the mirrors being such that the light which is derived from an external scene and designed to be focused at the image focal point is in the interval first reflected by the second primary mirror then by the secondary mirror, the secondary mirror being mobile relative to the image focal plane, and the optical combination further comprising a wide field focusing optics (OFGC) mobile relative to the image focal plane, the structure and the position, in wide field configuration, of the mirrors and of the wide field focusing optics being such that the light derived from an external scene and designed to be focused at the image focal plane via the wide field focusing optics in not reflected by any of said primary or secondary mirrors in the interval.</p> |
