Compact dual-field ir2-ir3 imaging system

G - Physics – 02 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G02B 23/12 (2006.01)

Patent

CA 2672624

The invention relates to a dual-field (small field and large field) imaging system including an optronic detector (1) and an optical combination of small field focalisation (Fpc) comprising on an optical axis: a head lens (G1); a small-field inlet pupil in the vicinity of the head lens; a real large-field inlet pupil, i.e. provided upstream the head lens; an intermediate focal plane (IFP); the optical combination further comprising on the optical axis the following dioptric groups: a convergent head group G1 having a focal F, with F<Fpc/2, said G1 group including the head lens; a field changing divergent group G2 capable of displacement along the optical axis, said group being located upstream the IFP in a SF configuration and downstream the IFP in a LF configuration; a relay group G3 imaging the IFP on the focal plane of the detector. It comprises a cooled IR2 and IR3 detector and an optical combination including 6 lenses, including at least one diffractive lens, in the head group G1, and at least 3 different materials including CaF2 are used for the lenses of the head group G1.

L'invention concerne un système d'imagerie bi-champ (petit champ et grand champ) comportant un détecteur optronique (1 ) et une combinaison optique de focale petit champ Fpc présentant sur un axe optique: - une lentille de tête (G1 ), - une pupille d'entrée petit champ située au voisinage de la lentille de tête, - une pupille d'entrée grand champ réelle c'est-à-dire située en amont de la lentille de tête, - un plan focal intermédiaire (PFI), la combinaison optique comprenant sur l'axe optique les groupes dioptriques suivants: - un groupe de tête G1 convergent de focale F, avec F<FPC/2, ce groupe G1 comprenant la lentille de tête, - un groupe divergent de changement de champ G2 mobile le long de l'axe optique, ce groupe étant situé en amont du PFI en configuration PC et en aval du PFI en configuration GC1 - un groupe relais G3 imageant le PFI sur le plan focal du détecteur. Il comprend un détecteur IR2 et IR3 refroidi, au moins 3 matériaux différents dont du CaF2 sont utilisés pour les lentilles du groupe de tête G1.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Compact dual-field ir2-ir3 imaging system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compact dual-field ir2-ir3 imaging system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact dual-field ir2-ir3 imaging system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1812783

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.