Patent ID: 11960064
Assignee: BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A MidWave InfraRed (MWIR) lens device for remote sensing comprising;
a first optical group configured to converge MWIR radiation from a remote object, wherein first optical group comprises a first optical element having a positive optical power, a second optical element having a negative optical power and a third optical element having a positive optical power;
a first fold mirror configured to receive a converged MWIR radiation from the first optical group;
a second fold mirror configured to receive the converged MWIR radiation from the first fold mirror;
a second optical group configured to receive the converged MWIR radiation from the second fold mirror and focus the converged MWIR radiation, wherein the second optical group comprises a fourth optical element having a positive optical power, a fifth optical element having a positive optical power, a sixth optical element having a negative optical power, and a seventh optical element having a positive optical power;
an aperture stop configured to receive the focused MWIR radiation from the second optical group;
a Focal Plane Array (FPA) configured to receive an output from the aperture stop;
wherein the MidWave InfraRed (MWIR) lens device has a spectral waveband of 3.3 μm to 5.1 μm, with a distortion of 1% at an edge of said FPA, an angular field of view of 10.94 degrees, FPA edge-to-edge, an effective focal length of 20 inches, and an F # of 3.33;
whereby an image is formed on the FPA.