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

Claim 0:
1. 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 a positive optical power, the first group comprising one of a first changeable optical group according to a first configuration and a second changeable optical group according to a second configuration, wherein the first changeable optical group and the second changeable optical group are configured to be interchangeable to provide different properties for the discrete zoom lens;
a fold mirror;
a second group having a positive optical power;
an aperture stop; and
a focal plane array;
wherein the discrete zoom lens having the first changeable optical group has a focal length of 6.39 inches and the discrete zoom lens having the second changeable optical group has a focal length of 9 inches.