Patent ID: 11860345
Assignee: BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A discrete zoom lens, with elements arranged in order from a remote object to an image plane, comprising:
a scanning mirror;
a first group having one of the following:
a first changeable optical group having a positive optical power, wherein the first changeable optical group is configured to receive light from the remote object and to direct converged light onto the second group, the first changeable optical group comprising three optical elements having in order from the remote object to the image plane positive, negative, and positive optical powers; or
a second changeable optical group having a positive optical power, wherein the second changeable optical group is configured to receive light from the remote object and to direct converged light onto the second group, the second changeable optical group comprising three optical elements having in order from the remote object to the image plane positive, negative, and positive optical powers;

a fold mirror;
a second group having a positive optical power, wherein the second group comprises eight elements having in order from the remote object to the image plane positive, positive, negative, positive, negative, positive, positive, positive optical powers;
an aperture stop; and
a focal plane array;
wherein a magnification of the second group is about 1x.